[PATCH v2 00/22] git-remote-mediawiki: Follow perlcritic's recommandations

[PATCH v2 00/22] git-remote-mediawiki: Follow perlcritic's recommandations

[Célestin Matte]

v2 of patch to follow perlcritic's recommandations ([1])

Changes with v1:
- split first commit into 6 different commits
- remove commit [17/18] about moving open() call
- took every other comment into account

[1]: http://thread.gmane.org/gmane.comp.version-control.git/226533

Célestin Matte (22):
  git-remote-mediawiki: Replace :utf8 by :encoding(UTF-8)
  git-remote-mediawiki: Use the Readonly module instead of the constant
    pragma
  git-remote-mediawiki: Always end a subroutine with a return
  git-remote-mediawiki: Move a variable declaration at the top of the
    code
  git-remote-mediawiki: Change syntax of map calls
  git-remote-mediawiki: Rewrite unclear line of instructions
  git-remote-mediawiki: Change style of some regular expressions
  git-remote-mediawiki: Add newline in the end of die() error messages
  git-remote-mediawiki: Change the name of a variable
  git-remote-mediawiki: Turn double-negated expressions into simple
    expressions
  git-remote-mediawiki: Remove unused variable $entry
  git-remote-mediawiki: Rename a variable ($last) which has the name of
    a keyword
  git-remote-mediawiki: Assign a variable as undef and make proper
    indentation
  git-remote-mediawiki: Check return value of open + remove import of
    unused open2
  git-remote-mediawiki: Put long code into a subroutine
  git-remote-mediawiki: Modify strings for a better coding-style
  git-remote-mediawiki: Brace file handles for print for more clarity
  git-remote-mediawiki: Replace "unless" statements with negated "if"
    statements
  git-remote-mediawiki: Don't use quotes for empty strings
  git-remote-mediawiki: Put non-trivial numeric values in constants.
  git-remote-mediawiki: Fix a typo ("mediwiki" instead of "mediawiki")
  git-remote-mediawiki: Clearly rewrite double dereference

 contrib/mw-to-git/git-remote-mediawiki.perl |  545 ++++++++++++++-------------
 1 file changed, 293 insertions(+), 252 deletions(-)

-- 
1.7.9.5

[PATCH v2 01/22] git-remote-mediawiki: Replace :utf8 by :encoding(UTF-8)

[Célestin Matte]

Follow perlcritic's InputOutput::RequireEncodingWithUTF8Layer policy

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 7b61e73..4893442 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -18,8 +18,8 @@ use DateTime::Format::ISO8601;
 use warnings;
 
 # By default, use UTF-8 to communicate with Git and the user
-binmode STDERR, ":utf8";
-binmode STDOUT, ":utf8";
+binmode STDERR, ":encoding(UTF-8)";
+binmode STDOUT, ":encoding(UTF-8)";
 
 use URI::Escape;
 use IPC::Open2;
@@ -588,7 +588,7 @@ sub literal_data_raw {
 	utf8::downgrade($content);
 	binmode STDOUT, ":raw";
 	print STDOUT "data ", bytes::length($content), "\n", $content;
-	binmode STDOUT, ":utf8";
+	binmode STDOUT, ":encoding(UTF-8)";
 }
 
 sub mw_capabilities {
-- 
1.7.9.5

[PATCH v2 02/22] git-remote-mediawiki: Use the Readonly module instead of the constant pragma

[Célestin Matte]

Follow ValuesAndExpressions::ProhibitConstantPragma

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 4893442..e60793a 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -26,21 +26,21 @@ use IPC::Open2;
 use Readonly;
 
 # Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
-use constant SLASH_REPLACEMENT => "%2F";
+Readonly my $SLASH_REPLACEMENT => "%2F";
 
 # It's not always possible to delete pages (may require some
 # privileges). Deleted pages are replaced with this content.
-use constant DELETED_CONTENT => "[[Category:Deleted]]\n";
+Readonly my $DELETED_CONTENT => "[[Category:Deleted]]\n";
 
 # It's not possible to create empty pages. New empty files in Git are
 # sent with this content instead.
-use constant EMPTY_CONTENT => "<!-- empty page -->\n";
+Readonly my $EMPTY_CONTENT => "<!-- empty page -->\n";
 
 # used to reflect file creation or deletion in diff.
-use constant NULL_SHA1 => "0000000000000000000000000000000000000000";
+Readonly my $NULL_SHA1 => "0000000000000000000000000000000000000000";
 
 # Used on Git's side to reflect empty edit messages on the wiki
-use constant EMPTY_MESSAGE => '*Empty MediaWiki Message*';
+Readonly my $EMPTY_MESSAGE => '*Empty MediaWiki Message*';
 
 if (@ARGV != 2) {
 	exit_error_usage();
@@ -538,7 +538,7 @@ sub mediawiki_clean {
 	$string =~ s/\s+$//;
 	if ($string eq "" && $page_created) {
 		# Creating empty pages is forbidden.
-		$string = EMPTY_CONTENT;
+		$string = $EMPTY_CONTENT;
 	}
 	return $string."\n";
 }
@@ -546,7 +546,7 @@ sub mediawiki_clean {
 # Filter applied on MediaWiki data before adding them to Git
 sub mediawiki_smudge {
 	my $string = shift;
-	if ($string eq EMPTY_CONTENT) {
+	if ($string eq $EMPTY_CONTENT) {
 		$string = "";
 	}
 	# This \n is important. This is due to mediawiki's way to handle end of files.
@@ -707,7 +707,7 @@ sub import_file_revision {
 	if (!$full_import && $n == 1) {
 		print STDOUT "from refs/mediawiki/$remotename/master^0\n";
 	}
-	if ($content ne DELETED_CONTENT) {
+	if ($content ne $DELETED_CONTENT) {
 		print STDOUT "M 644 inline " .
 		    fe_escape_path($title . ".mw") . "\n";
 		literal_data($content);
@@ -888,7 +888,7 @@ sub mw_import_revids {
 
 		my %commit;
 		$commit{author} = $rev->{user} || 'Anonymous';
-		$commit{comment} = $rev->{comment} || EMPTY_MESSAGE;
+		$commit{comment} = $rev->{comment} || $EMPTY_MESSAGE;
 		$commit{title} = mediawiki_smudge_filename($page_title);
 		$commit{mw_revision} = $rev->{revid};
 		$commit{content} = mediawiki_smudge($rev->{'*'});
@@ -1006,14 +1006,14 @@ sub mw_push_file {
 	my $oldrevid = shift;
 	my $newrevid;
 
-	if ($summary eq EMPTY_MESSAGE) {
+	if ($summary eq $EMPTY_MESSAGE) {
 		$summary = '';
 	}
 
 	my $new_sha1 = $diff_info_split[3];
 	my $old_sha1 = $diff_info_split[2];
-	my $page_created = ($old_sha1 eq NULL_SHA1);
-	my $page_deleted = ($new_sha1 eq NULL_SHA1);
+	my $page_created = ($old_sha1 eq $NULL_SHA1);
+	my $page_deleted = ($new_sha1 eq $NULL_SHA1);
 	$complete_file_name = mediawiki_clean_filename($complete_file_name);
 
 	my ($title, $extension) = $complete_file_name =~ /^(.*)\.([^\.]*)$/;
@@ -1032,7 +1032,7 @@ sub mw_push_file {
 			# special privileges. A common
 			# convention is to replace the page
 			# with this content instead:
-			$file_content = DELETED_CONTENT;
+			$file_content = $DELETED_CONTENT;
 		} else {
 			$file_content = run_git("cat-file blob $new_sha1");
 		}
-- 
1.7.9.5

Re: [PATCH v2 02/22] git-remote-mediawiki: Use the Readonly module instead of the constant pragma

[Jeff King]

On Fri, Jun 07, 2013 at 11:42:03PM +0200, Célestin Matte wrote:

> diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
> index 4893442..e60793a 100755
> --- a/contrib/mw-to-git/git-remote-mediawiki.perl
> +++ b/contrib/mw-to-git/git-remote-mediawiki.perl
> @@ -26,21 +26,21 @@ use IPC::Open2;
>  use Readonly;

What does this series apply on top of? The existing version in "master"
does not have "use Readonly" in it at all. The first version of your
series introduced that line, but here it is shown as an existing line.
Did you miss a commit when putting your patches together?

>  # Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
> -use constant SLASH_REPLACEMENT => "%2F";
> +Readonly my $SLASH_REPLACEMENT => "%2F";

What advantage does this have over "use constant"? I do not mind
following guidelines from perlcritic if they are a matter of style, but
in this case there is a cost: we now depend on the "Readonly" module,
which is not part of the standard distribution. I.e., users now have to
deal with installing an extra dependency. Is it worth it?

-Peff

Re: [PATCH v2 02/22] git-remote-mediawiki: Use the Readonly module instead of the constant pragma

[Benoît Person]

The major drawback of using perl `constant` is the fact that they do
not interpolate like variables in most of the contexts (those who
automatically quotes barewords). Like said on Perl Monks here [1], you
have to do some "tricks" depending on the context in which you're
using the constant and that's not really "clean".

But maybe trading clean for another package is not worth it. I just
searched for alternatives way of doing it and none seems to be in the
core packages so maybe we should just drop this.

[1] http://www.perlmonks.org/?node_id=777711

On 8 June 2013 05:23, Jeff King <peff@peff.net> wrote:
> On Fri, Jun 07, 2013 at 11:42:03PM +0200, Célestin Matte wrote:
>
>> diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
>> index 4893442..e60793a 100755
>> --- a/contrib/mw-to-git/git-remote-mediawiki.perl
>> +++ b/contrib/mw-to-git/git-remote-mediawiki.perl
>> @@ -26,21 +26,21 @@ use IPC::Open2;
>>  use Readonly;
>
> What does this series apply on top of? The existing version in "master"
> does not have "use Readonly" in it at all. The first version of your
> series introduced that line, but here it is shown as an existing line.
> Did you miss a commit when putting your patches together?
>
>>  # Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
>> -use constant SLASH_REPLACEMENT => "%2F";
>> +Readonly my $SLASH_REPLACEMENT => "%2F";
>
> What advantage does this have over "use constant"? I do not mind
> following guidelines from perlcritic if they are a matter of style, but
> in this case there is a cost: we now depend on the "Readonly" module,
> which is not part of the standard distribution. I.e., users now have to
> deal with installing an extra dependency. Is it worth it?
>
> -Peff
> --
> To unsubscribe from this list: send the line "unsubscribe git" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH v2 02/22] git-remote-mediawiki: Use the Readonly module instead of the constant pragma

[Célestin Perdu]

Le 08/06/2013 05:23, Jeff King a écrit :
> What does this series apply on top of? The existing version in "master"
> does not have "use Readonly" in it at all. The first version of your
> series introduced that line, but here it is shown as an existing line.
> Did you miss a commit when putting your patches together?

Oh yes, part of this commit went into the previous one, which was not
formated as an email when I did my git-format-patch. I should check my
patches more carefully before sending them. Sorry for this.

> What advantage does this have over "use constant"? I do not mind
> following guidelines from perlcritic if they are a matter of style, but
> in this case there is a cost: we now depend on the "Readonly" module,
> which is not part of the standard distribution. I.e., users now have to
> deal with installing an extra dependency. Is it worth it?

Like Benoit said, the problem is that they sometimes don't interpolate.
I don't know if we should keep this commit or not.

Re: [PATCH v2 02/22] git-remote-mediawiki: Use the Readonly module instead of the constant pragma

[Jeff King]

On Sat, Jun 08, 2013 at 03:01:03PM +0200, Célestin Perdu wrote:

> Oh yes, part of this commit went into the previous one, which was not
> formated as an email when I did my git-format-patch. I should check my
> patches more carefully before sending them. Sorry for this.

No problem. It is easy to make simple mistakes like that with our
workflow, but it is also easy to fix them and repost. :)

> > What advantage does this have over "use constant"? I do not mind
> > following guidelines from perlcritic if they are a matter of style, but
> > in this case there is a cost: we now depend on the "Readonly" module,
> > which is not part of the standard distribution. I.e., users now have to
> > deal with installing an extra dependency. Is it worth it?
> 
> Like Benoit said, the problem is that they sometimes don't interpolate.
> I don't know if we should keep this commit or not.

Thanks both for the explanation.  I don't see us using that to our
advantage anywhere in the patch. So I think this is purely a style
issue, which to me indicates that the extra dependency is not worth it,
and the patch should be dropped.

-Peff

Re: [PATCH v2 02/22] git-remote-mediawiki: Use the Readonly module instead of the constant pragma

[Matthieu Moy]

Jeff King <peff@peff.net> writes:

> Thanks both for the explanation.  I don't see us using that to our
> advantage anywhere in the patch. So I think this is purely a style
> issue, which to me indicates that the extra dependency is not worth it,
> and the patch should be dropped.

Same here: I'd rather keep the dependency list small.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

[PATCH v2 03/22] git-remote-mediawiki: Always end a subroutine with a return

[Célestin Matte]

Follow Subroutines::RequireFinalReturn

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index e60793a..bbde9fd 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -198,12 +198,14 @@ sub mw_connect_maybe {
 			exit 1;
 		}
 	}
+	return;
 }
 
 ## Functions for listing pages on the remote wiki
 sub get_mw_tracked_pages {
 	my $pages = shift;
 	get_mw_page_list(\@tracked_pages, $pages);
+	return;
 }
 
 sub get_mw_page_list {
@@ -219,6 +221,7 @@ sub get_mw_page_list {
 		get_mw_first_pages(\@slice, $pages);
 		@some_pages = @some_pages[51..$#some_pages];
 	}
+	return;
 }
 
 sub get_mw_tracked_categories {
@@ -241,6 +244,7 @@ sub get_mw_tracked_categories {
 			$pages->{$page->{title}} = $page;
 		}
 	}
+	return;
 }
 
 sub get_mw_all_pages {
@@ -260,6 +264,7 @@ sub get_mw_all_pages {
 	foreach my $page (@{$mw_pages}) {
 		$pages->{$page->{title}} = $page;
 	}
+	return;
 }
 
 # queries the wiki for a set of pages. Meant to be used within a loop
@@ -290,6 +295,7 @@ sub get_mw_first_pages {
 			$pages->{$page->{title}} = $page;
 		}
 	}
+	return;
 }
 
 # Get the list of pages to be fetched according to configuration.
@@ -358,6 +364,7 @@ sub get_all_mediafiles {
 	foreach my $page (@{$mw_pages}) {
 		$pages->{$page->{title}} = $page;
 	}
+	return;
 }
 
 sub get_linked_mediafiles {
@@ -404,6 +411,7 @@ sub get_linked_mediafiles {
 
 		@titles = @titles[($batch+1)..$#titles];
 	}
+	return;
 }
 
 sub get_mw_mediafile_for_page_revision {
@@ -579,6 +587,7 @@ sub mediawiki_smudge_filename {
 sub literal_data {
 	my ($content) = @_;
 	print STDOUT "data ", bytes::length($content), "\n", $content;
+	return;
 }
 
 sub literal_data_raw {
@@ -589,6 +598,7 @@ sub literal_data_raw {
 	binmode STDOUT, ":raw";
 	print STDOUT "data ", bytes::length($content), "\n", $content;
 	binmode STDOUT, ":encoding(UTF-8)";
+	return;
 }
 
 sub mw_capabilities {
@@ -600,6 +610,7 @@ sub mw_capabilities {
 	print STDOUT "list\n";
 	print STDOUT "push\n";
 	print STDOUT "\n";
+	return;
 }
 
 sub mw_list {
@@ -608,11 +619,13 @@ sub mw_list {
 	print STDOUT "? refs/heads/master\n";
 	print STDOUT "\@refs/heads/master HEAD\n";
 	print STDOUT "\n";
+	return;
 }
 
 sub mw_option {
 	print STDERR "remote-helper command 'option $_[0]' not yet implemented\n";
 	print STDOUT "unsupported\n";
+	return;
 }
 
 sub fetch_mw_revisions_for_page {
@@ -734,6 +747,7 @@ sub import_file_revision {
 	print STDOUT "N inline :$n\n";
 	literal_data("mediawiki_revision: " . $commit{mw_revision});
 	print STDOUT "\n\n";
+	return;
 }
 
 # parse a sequence of
@@ -754,6 +768,7 @@ sub get_more_refs {
 			die("Invalid command in a '$cmd' batch: ". $_);
 		}
 	}
+	return;
 }
 
 sub mw_import {
@@ -763,6 +778,7 @@ sub mw_import {
 		mw_import_ref($ref);
 	}
 	print STDOUT "done\n";
+	return;
 }
 
 sub mw_import_ref {
@@ -806,6 +822,7 @@ sub mw_import_ref {
 		# thrown saying that HEAD is referring to unknown object 0000000000000000000
 		# and the clone fails.
 	}
+	return;
 }
 
 sub mw_import_ref_by_pages {
@@ -1112,6 +1129,7 @@ sub mw_push {
 		print STDERR "  git pull --rebase\n";
 		print STDERR "\n";
 	}
+	return;
 }
 
 sub mw_push_revision {
-- 
1.7.9.5

[PATCH v2 04/22] git-remote-mediawiki: Move a variable declaration at the top of the code

[Célestin Matte]

%basetimestamps declaration was lost in the middle of subroutines

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index bbde9fd..dc8dd1f 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -96,6 +96,9 @@ unless ($fetch_strategy) {
 	$fetch_strategy = "by_page";
 }
 
+# Remember the timestamp corresponding to a revision id.
+my %basetimestamps;
+
 # Dumb push: don't update notes and mediawiki ref to reflect the last push.
 #
 # Configurable with mediawiki.dumbPush, or per-remote with
@@ -481,9 +484,6 @@ sub get_last_local_revision {
 	return $lastrevision_number;
 }
 
-# Remember the timestamp corresponding to a revision id.
-my %basetimestamps;
-
 # Get the last remote revision without taking in account which pages are
 # tracked or not. This function makes a single request to the wiki thus
 # avoid a loop onto all tracked pages. This is useful for the fetch-by-rev
-- 
1.7.9.5

[PATCH v2 05/22] git-remote-mediawiki: Change syntax of map calls

[Célestin Matte]

Put first parameter of map inside a block, for better readability.
Follow BuiltinFunctions::RequireBlockMap

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index dc8dd1f..5e348cb 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -372,7 +372,7 @@ sub get_all_mediafiles {
 
 sub get_linked_mediafiles {
 	my $pages = shift;
-	my @titles = map $_->{title}, values(%{$pages});
+	my @titles = map { $_->{title} } values(%{$pages});
 
 	# The query is split in small batches because of the MW API limit of
 	# the number of links to be returned (500 links max).
@@ -400,11 +400,13 @@ sub get_linked_mediafiles {
 		while (my ($id, $page) = each(%{$result->{query}->{pages}})) {
 			my @media_titles;
 			if (defined($page->{links})) {
-				my @link_titles = map $_->{title}, @{$page->{links}};
+				my @link_titles
+				    = map { $_->{title} } @{$page->{links}};
 				push(@media_titles, @link_titles);
 			}
 			if (defined($page->{images})) {
-				my @image_titles = map $_->{title}, @{$page->{images}};
+				my @image_titles
+				    = map { $_->{title} } @{$page->{images}};
 				push(@media_titles, @image_titles);
 			}
 			if (@media_titles) {
@@ -834,7 +836,7 @@ sub mw_import_ref_by_pages {
 	my ($n, @revisions) = fetch_mw_revisions(\@pages, $fetch_from);
 
 	@revisions = sort {$a->{revid} <=> $b->{revid}} @revisions;
-	my @revision_ids = map $_->{revid}, @revisions;
+	my @revision_ids = map { $_->{revid} } @revisions;
 
 	return mw_import_revids($fetch_from, \@revision_ids, \%pages_hash);
 }
@@ -1247,8 +1249,8 @@ sub get_allowed_file_extensions {
 		siprop => 'fileextensions'
 		};
 	my $result = $mediawiki->api($query);
-	my @file_extensions= map $_->{ext},@{$result->{query}->{fileextensions}};
-	my %hashFile = map {$_ => 1}@file_extensions;
+	my @file_extensions = map { $_->{ext}} @{$result->{query}->{fileextensions}};
+	my %hashFile = map { $_ => 1 } @file_extensions;
 
 	return %hashFile;
 }
-- 
1.7.9.5

[PATCH v2 06/22] git-remote-mediawiki: Rewrite unclear line of instructions

[Célestin Matte]

Subroutines' parameters should be affected to variable before doing anything
else
Besides, existing instruction affected a variable inside a "if", which break
Git's coding style

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 5e348cb..a5c963b 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -1334,7 +1334,8 @@ sub get_mw_namespace_id {
 }
 
 sub get_mw_namespace_id_for_page {
-	if (my ($namespace) = $_[0] =~ /^([^:]*):/) {
+	my $namespace = shift;
+	if ($namespace =~ /^([^:]*):/) {
 		return get_mw_namespace_id($namespace);
 	} else {
 		return;
-- 
1.7.9.5

[PATCH v2 07/22] git-remote-mediawiki: Change style of some regular expressions

[Célestin Matte]

- Remove m modifier when useless (m// and // was used randomly; this makes the
code more coherent)
- Remove stringy split (split('c', ...) instead of split(/c/, ...))
- Use {}{} instead of /// when slashes are used inside the regexp so as not to
escape it.
A "split ' '" is turned into a "split / /", which changes its behaviour: the old
method matched a run of whtespaces (/\s*/), while the new one will match a
single whitespace, which is what we want here.

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index a5c963b..482cd95 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -121,7 +121,7 @@ chomp($dumb_push);
 $dumb_push = ($dumb_push eq "true");
 
 my $wiki_name = $url;
-$wiki_name =~ s/[^\/]*:\/\///;
+$wiki_name =~ s{[^/]*://}{};
 # If URL is like http://user:password@example.com/, we clearly don't
 # want the password in $wiki_name. While we're there, also remove user
 # and '@' sign, to avoid author like MWUser@HTTPUser@host.com
@@ -565,7 +565,7 @@ sub mediawiki_smudge {
 
 sub mediawiki_clean_filename {
 	my $filename = shift;
-	$filename =~ s/@{[SLASH_REPLACEMENT]}/\//g;
+	$filename =~ s{$SLASH_REPLACEMENT}{/}g;
 	# [, ], |, {, and } are forbidden by MediaWiki, even URL-encoded.
 	# Do a variant of URL-encoding, i.e. looks like URL-encoding,
 	# but with _ added to prevent MediaWiki from thinking this is
@@ -579,7 +579,7 @@ sub mediawiki_clean_filename {
 
 sub mediawiki_smudge_filename {
 	my $filename = shift;
-	$filename =~ s/\//@{[SLASH_REPLACEMENT]}/g;
+	$filename =~ s{/}{$SLASH_REPLACEMENT}g;
 	$filename =~ s/ /_/g;
 	# Decode forbidden characters encoded in mediawiki_clean_filename
 	$filename =~ s/_%_([0-9a-fA-F][0-9a-fA-F])/sprintf("%c", hex($1))/ge;
@@ -762,7 +762,7 @@ sub get_more_refs {
 	my @refs;
 	while (1) {
 		my $line = <STDIN>;
-		if ($line =~ m/^$cmd (.*)$/) {
+		if ($line =~ /^$cmd (.*)$/) {
 			push(@refs, $1);
 		} elsif ($line eq "\n") {
 			return @refs;
@@ -1168,11 +1168,11 @@ sub mw_push_revision {
 		my @local_ancestry = split(/\n/, run_git("rev-list --boundary --parents $local ^$parsed_sha1"));
 		my %local_ancestry;
 		foreach my $line (@local_ancestry) {
-			if (my ($child, $parents) = $line =~ m/^-?([a-f0-9]+) ([a-f0-9 ]+)/) {
-				foreach my $parent (split(' ', $parents)) {
+			if (my ($child, $parents) = $line =~ /^-?([a-f0-9]+) ([a-f0-9 ]+)/) {
+				foreach my $parent (split(/ /, $parents)) {
 					$local_ancestry{$parent} = $child;
 				}
-			} elsif (!$line =~ m/^([a-f0-9]+)/) {
+			} elsif (!$line =~ /^([a-f0-9]+)/) {
 				die "Unexpected output from git rev-list: $line";
 			}
 		}
@@ -1190,10 +1190,10 @@ sub mw_push_revision {
 		# history (linearized with --first-parent)
 		print STDERR "Warning: no common ancestor, pushing complete history\n";
 		my $history = run_git("rev-list --first-parent --children $local");
-		my @history = split('\n', $history);
+		my @history = split(/\n/, $history);
 		@history = @history[1..$#history];
 		foreach my $line (reverse @history) {
-			my @commit_info_split = split(/ |\n/, $line);
+			my @commit_info_split = split(/[ \n]/, $line);
 			push(@commit_pairs, \@commit_info_split);
 		}
 	}
@@ -1272,7 +1272,7 @@ sub get_mw_namespace_id {
 		# Look at configuration file, if the record for that namespace is
 		# already cached. Namespaces are stored in form:
 		# "Name_of_namespace:Id_namespace", ex.: "File:6".
-		my @temp = split(/[\n]/, run_git("config --get-all remote."
+		my @temp = split(/\n/, run_git("config --get-all remote."
 						. $remotename .".namespaceCache"));
 		chomp(@temp);
 		foreach my $ns (@temp) {
-- 
1.7.9.5

Re: [PATCH v2 07/22] git-remote-mediawiki: Change style of some regular expressions

[Eric Sunshine]

On Fri, Jun 7, 2013 at 5:42 PM, Célestin Matte
<celestin.matte@ensimag.fr> wrote:
> - Remove m modifier when useless (m// and // was used randomly; this makes the
> code more coherent)
> - Remove stringy split (split('c', ...) instead of split(/c/, ...))
> - Use {}{} instead of /// when slashes are used inside the regexp so as not to
> escape it.

When you split up 1/22 from v1 into distinct patches, review became
much easier. The same can be done here (IMHO). The above bullet points
are each conceptually distinct (even if they may happen to overlap
textually in some cases).

> A "split ' '" is turned into a "split / /", which changes its behaviour: the old
> method matched a run of whtespaces (/\s*/), while the new one will match a
> single whitespace, which is what we want here.

The phrase "which is what we want here" does not convey much. Taking a
hint from Junio's responses explaining why he finds this subtle change
acceptable, perhaps a paragraph like this might be appropriate:

  Note the special case split(' ') for which Perl splits on runs of
  whitespace, whereas split(/ /) splits on exactly one space.  In
  other contexts, changing split(' ') to split(/ /) could potentially
  be a regression, however, here, when parsing the output of
  "rev-list --parents", whose output SHA-1's are each separated by a
  single space, splitting on a single space is perfectly correct.

More comments below.

> Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
> Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
> ---
>  contrib/mw-to-git/git-remote-mediawiki.perl |   20 ++++++++++----------
>  1 file changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
> index a5c963b..482cd95 100755
> --- a/contrib/mw-to-git/git-remote-mediawiki.perl
> +++ b/contrib/mw-to-git/git-remote-mediawiki.perl
> @@ -121,7 +121,7 @@ chomp($dumb_push);
>  $dumb_push = ($dumb_push eq "true");
>
>  my $wiki_name = $url;
> -$wiki_name =~ s/[^\/]*:\/\///;
> +$wiki_name =~ s{[^/]*://}{};
>  # If URL is like http://user:password@example.com/, we clearly don't
>  # want the password in $wiki_name. While we're there, also remove user
>  # and '@' sign, to avoid author like MWUser@HTTPUser@host.com
> @@ -565,7 +565,7 @@ sub mediawiki_smudge {
>
>  sub mediawiki_clean_filename {
>         my $filename = shift;
> -       $filename =~ s/@{[SLASH_REPLACEMENT]}/\//g;
> +       $filename =~ s{$SLASH_REPLACEMENT}{/}g;

The change from SLASH_REPLACEMENT to $SLASH_REPLACEMENT should have
happened in patch 2/22 where 'constant' was replaced with 'Readonly'.

>         # [, ], |, {, and } are forbidden by MediaWiki, even URL-encoded.
>         # Do a variant of URL-encoding, i.e. looks like URL-encoding,
>         # but with _ added to prevent MediaWiki from thinking this is
> @@ -579,7 +579,7 @@ sub mediawiki_clean_filename {
>
>  sub mediawiki_smudge_filename {
>         my $filename = shift;
> -       $filename =~ s/\//@{[SLASH_REPLACEMENT]}/g;
> +       $filename =~ s{/}{$SLASH_REPLACEMENT}g;

Ditto regarding patch 2/22.

>         $filename =~ s/ /_/g;
>         # Decode forbidden characters encoded in mediawiki_clean_filename
>         $filename =~ s/_%_([0-9a-fA-F][0-9a-fA-F])/sprintf("%c", hex($1))/ge;
> @@ -762,7 +762,7 @@ sub get_more_refs {
>         my @refs;
>         while (1) {
>                 my $line = <STDIN>;
> -               if ($line =~ m/^$cmd (.*)$/) {
> +               if ($line =~ /^$cmd (.*)$/) {
>                         push(@refs, $1);
>                 } elsif ($line eq "\n") {
>                         return @refs;
> @@ -1168,11 +1168,11 @@ sub mw_push_revision {
>                 my @local_ancestry = split(/\n/, run_git("rev-list --boundary --parents $local ^$parsed_sha1"));
>                 my %local_ancestry;
>                 foreach my $line (@local_ancestry) {
> -                       if (my ($child, $parents) = $line =~ m/^-?([a-f0-9]+) ([a-f0-9 ]+)/) {
> -                               foreach my $parent (split(' ', $parents)) {
> +                       if (my ($child, $parents) = $line =~ /^-?([a-f0-9]+) ([a-f0-9 ]+)/) {
> +                               foreach my $parent (split(/ /, $parents)) {
>                                         $local_ancestry{$parent} = $child;
>                                 }
> -                       } elsif (!$line =~ m/^([a-f0-9]+)/) {
> +                       } elsif (!$line =~ /^([a-f0-9]+)/) {
>                                 die "Unexpected output from git rev-list: $line";
>                         }
>                 }
> @@ -1190,10 +1190,10 @@ sub mw_push_revision {
>                 # history (linearized with --first-parent)
>                 print STDERR "Warning: no common ancestor, pushing complete history\n";
>                 my $history = run_git("rev-list --first-parent --children $local");
> -               my @history = split('\n', $history);
> +               my @history = split(/\n/, $history);

This looks fishy. In Perl, '\n' is not a newline, but instead a
literal backslash followed by an "n". The output of "rev-list
--first-parent" is line-oriented, so this looks like a bug in the
original code, which you may want to fix it in a separate patch to
make it clear that this is an actual bug fix, distinct from the
otherwise mechanical change of split('x') to split(/x/).

>                 @history = @history[1..$#history];
>                 foreach my $line (reverse @history) {
> -                       my @commit_info_split = split(/ |\n/, $line);
> +                       my @commit_info_split = split(/[ \n]/, $line);
>                         push(@commit_pairs, \@commit_info_split);
>                 }
>         }
> @@ -1272,7 +1272,7 @@ sub get_mw_namespace_id {
>                 # Look at configuration file, if the record for that namespace is
>                 # already cached. Namespaces are stored in form:
>                 # "Name_of_namespace:Id_namespace", ex.: "File:6".
> -               my @temp = split(/[\n]/, run_git("config --get-all remote."
> +               my @temp = split(/\n/, run_git("config --get-all remote."
>                                                 . $remotename .".namespaceCache"));
>                 chomp(@temp);
>                 foreach my $ns (@temp) {
> --

[PATCH v2 08/22] git-remote-mediawiki: Add newline in the end of die() error messages

[Célestin Matte]

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 482cd95..4baad95 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -136,16 +136,16 @@ while (<STDIN>) {
 	if (defined($cmd[0])) {
 		# Line not blank
 		if ($cmd[0] eq "capabilities") {
-			die("Too many arguments for capabilities") unless (!defined($cmd[1]));
+			die("Too many arguments for capabilities\n") unless (!defined($cmd[1]));
 			mw_capabilities();
 		} elsif ($cmd[0] eq "list") {
-			die("Too many arguments for list") unless (!defined($cmd[2]));
+			die("Too many arguments for list\n") unless (!defined($cmd[2]));
 			mw_list($cmd[1]);
 		} elsif ($cmd[0] eq "import") {
-			die("Invalid arguments for import") unless ($cmd[1] ne "" && !defined($cmd[2]));
+			die("Invalid arguments for import\n") unless ($cmd[1] ne "" && !defined($cmd[2]));
 			mw_import($cmd[1]);
 		} elsif ($cmd[0] eq "option") {
-			die("Too many arguments for option") unless ($cmd[1] ne "" && $cmd[2] ne "" && !defined($cmd[3]));
+			die("Too many arguments for option\n") unless ($cmd[1] ne "" && $cmd[2] ne "" && !defined($cmd[3]));
 			mw_option($cmd[1],$cmd[2]);
 		} elsif ($cmd[0] eq "push") {
 			mw_push($cmd[1]);
@@ -242,7 +242,7 @@ sub get_mw_tracked_categories {
 			cmtitle => $category,
 			cmlimit => 'max' } )
 			|| die $mediawiki->{error}->{code} . ': '
-				. $mediawiki->{error}->{details};
+				. $mediawiki->{error}->{details} . "\n";
 		foreach my $page (@{$mw_pages}) {
 			$pages->{$page->{title}} = $page;
 		}
@@ -767,7 +767,7 @@ sub get_more_refs {
 		} elsif ($line eq "\n") {
 			return @refs;
 		} else {
-			die("Invalid command in a '$cmd' batch: ". $_);
+			die("Invalid command in a '$cmd' batch: $_\n");
 		}
 	}
 	return;
@@ -879,7 +879,7 @@ sub mw_import_revids {
 		my $result = $mediawiki->api($query);
 
 		if (!$result) {
-			die "Failed to retrieve modified page for revision $pagerevid";
+			die "Failed to retrieve modified page for revision $pagerevid\n";
 		}
 
 		if (defined($result->{query}->{badrevids}->{$pagerevid})) {
@@ -888,7 +888,7 @@ sub mw_import_revids {
 		}
 
 		if (!defined($result->{query}->{pages})) {
-			die "Invalid revision $pagerevid.";
+			die "Invalid revision $pagerevid.\n";
 		}
 
 		my @result_pages = values(%{$result->{query}->{pages}});
@@ -999,7 +999,7 @@ sub mw_upload_file {
 			}, {
 				skip_encoding => 1
 			} ) || die $mediawiki->{error}->{code} . ':'
-				 . $mediawiki->{error}->{details};
+				 . $mediawiki->{error}->{details} . "\n";
 			my $last_file_page = $mediawiki->get_page({title => $path});
 			$newrevid = $last_file_page->{revid};
 			print STDERR "Pushed file: $new_sha1 - $complete_file_name.\n";
@@ -1079,7 +1079,7 @@ sub mw_push_file {
 				# Other errors. Shouldn't happen => just die()
 				die 'Fatal: Error ' .
 				    $mediawiki->{error}->{code} .
-				    ' from mediwiki: ' . $mediawiki->{error}->{details};
+				    ' from mediwiki: ' . $mediawiki->{error}->{details} . "\n";
 			}
 		}
 		$newrevid = $result->{edit}->{newrevid};
@@ -1101,7 +1101,7 @@ sub mw_push {
 	my $pushed;
 	for my $refspec (@refsspecs) {
 		my ($force, $local, $remote) = $refspec =~ /^(\+)?([^:]*):([^:]*)$/
-		    or die("Invalid refspec for push. Expected <src>:<dst> or +<src>:<dst>");
+		    or die("Invalid refspec for push. Expected <src>:<dst> or +<src>:<dst>\n");
 		if ($force) {
 			print STDERR "Warning: forced push not allowed on a MediaWiki.\n";
 		}
@@ -1173,7 +1173,7 @@ sub mw_push_revision {
 					$local_ancestry{$parent} = $child;
 				}
 			} elsif (!$line =~ /^([a-f0-9]+)/) {
-				die "Unexpected output from git rev-list: $line";
+				die "Unexpected output from git rev-list: $line\n";
 			}
 		}
 		while ($parsed_sha1 ne $HEAD_sha1) {
@@ -1227,7 +1227,7 @@ sub mw_push_revision {
 				return error_non_fast_forward($remote);
 			}
 			if ($status ne "ok") {
-				die("Unknown error from mw_push_file()");
+				die("Unknown error from mw_push_file()\n");
 			}
 		}
 		unless ($dumb_push) {
-- 
1.7.9.5

[PATCH v2 09/22] git-remote-mediawiki: Change the name of a variable

[Célestin Matte]

Local variable $url has the same name as a global variable. Changing the name
of the local variable prevents future possible misunderstanding.

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 4baad95..68fd129 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -455,14 +455,14 @@ sub get_mw_mediafile_for_page_revision {
 }
 
 sub download_mw_mediafile {
-	my $url = shift;
+	my $download_url = shift;
 
-	my $response = $mediawiki->{ua}->get($url);
+	my $response = $mediawiki->{ua}->get($download_url);
 	if ($response->code == 200) {
 		return $response->decoded_content;
 	} else {
 		print STDERR "Error downloading mediafile from :\n";
-		print STDERR "URL: $url\n";
+		print STDERR "URL: $download_url\n";
 		print STDERR "Server response: " . $response->code . " " . $response->message . "\n";
 		exit 1;
 	}
-- 
1.7.9.5

[PATCH v2 10/22] git-remote-mediawiki: Turn double-negated expressions into simple expressions

[Célestin Matte]

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 68fd129..a6c7de2 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -136,16 +136,16 @@ while (<STDIN>) {
 	if (defined($cmd[0])) {
 		# Line not blank
 		if ($cmd[0] eq "capabilities") {
-			die("Too many arguments for capabilities\n") unless (!defined($cmd[1]));
+			die("Too many arguments for capabilities\n") if (defined($cmd[1]));
 			mw_capabilities();
 		} elsif ($cmd[0] eq "list") {
-			die("Too many arguments for list\n") unless (!defined($cmd[2]));
+			die("Too many arguments for list\n") if (defined($cmd[2]));
 			mw_list($cmd[1]);
 		} elsif ($cmd[0] eq "import") {
-			die("Invalid arguments for import\n") unless ($cmd[1] ne "" && !defined($cmd[2]));
+			die("Invalid arguments for import\n") if ($cmd[1] eq "" || defined($cmd[2]));
 			mw_import($cmd[1]);
 		} elsif ($cmd[0] eq "option") {
-			die("Too many arguments for option\n") unless ($cmd[1] ne "" && $cmd[2] ne "" && !defined($cmd[3]));
+			die("Too many arguments for option\n") if ($cmd[1] eq "" || $cmd[2] eq "" || defined($cmd[3]));
 			mw_option($cmd[1],$cmd[2]);
 		} elsif ($cmd[0] eq "push") {
 			mw_push($cmd[1]);
-- 
1.7.9.5

[PATCH v2 11/22] git-remote-mediawiki: Remove unused variable $entry

[Célestin Matte]

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    1 -
 1 file changed, 1 deletion(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index a6c7de2..cf8dfc8 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -128,7 +128,6 @@ $wiki_name =~ s{[^/]*://}{};
 $wiki_name =~ s/^.*@//;
 
 # Commands parser
-my $entry;
 my @cmd;
 while (<STDIN>) {
 	chomp;
-- 
1.7.9.5

[PATCH v2 12/22] git-remote-mediawiki: Rename a variable ($last) which has the name of a keyword

[Célestin Matte]

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index cf8dfc8..7fbc998 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -215,11 +215,11 @@ sub get_mw_page_list {
 	my $pages = shift;
 	my @some_pages = @$page_list;
 	while (@some_pages) {
-		my $last = 50;
-		if ($#some_pages < $last) {
-			$last = $#some_pages;
+		my $last_page = 50;
+		if ($#some_pages < $last_page) {
+			$last_page = $#some_pages;
 		}
-		my @slice = @some_pages[0..$last];
+		my @slice = @some_pages[0..$last_page];
 		get_mw_first_pages(\@slice, $pages);
 		@some_pages = @some_pages[51..$#some_pages];
 	}
-- 
1.7.9.5

[PATCH v2 13/22] git-remote-mediawiki: Assign a variable as undef and make proper indentation

[Célestin Matte]

Explicitly assign local variable $/ as undef and make a proper
one-instruction-by-line indentation

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 7fbc998..ae6dd2e 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -339,7 +339,10 @@ sub run_git {
 	my $args = shift;
 	my $encoding = (shift || "encoding(UTF-8)");
 	open(my $git, "-|:$encoding", "git " . $args);
-	my $res = do { local $/; <$git> };
+	my $res = do { 
+		local $/ = undef;
+		<$git>
+	};
 	close($git);
 
 	return $res;
-- 
1.7.9.5

[PATCH v2 14/22] git-remote-mediawiki: Check return value of open + remove import of unused open2

[Célestin Matte]

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index ae6dd2e..1c34ada 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -22,7 +22,6 @@ binmode STDERR, ":encoding(UTF-8)";
 binmode STDOUT, ":encoding(UTF-8)";
 
 use URI::Escape;
-use IPC::Open2;
 use Readonly;
 
 # Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
@@ -338,7 +337,8 @@ sub get_mw_pages {
 sub run_git {
 	my $args = shift;
 	my $encoding = (shift || "encoding(UTF-8)");
-	open(my $git, "-|:$encoding", "git " . $args);
+	open(my $git, "-|:$encoding", "git " . $args)
+	    or die "Unable to open: $!\n";
 	my $res = do { 
 		local $/ = undef;
 		<$git>
-- 
1.7.9.5

Re: [PATCH v2 14/22] git-remote-mediawiki: Check return value of open + remove import of unused open2

[Eric Sunshine]

On Fri, Jun 7, 2013 at 5:42 PM, Célestin Matte
<celestin.matte@ensimag.fr> wrote:
> Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
> Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
> ---
>  contrib/mw-to-git/git-remote-mediawiki.perl |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
> index ae6dd2e..1c34ada 100755
> --- a/contrib/mw-to-git/git-remote-mediawiki.perl
> +++ b/contrib/mw-to-git/git-remote-mediawiki.perl
> @@ -22,7 +22,6 @@ binmode STDERR, ":encoding(UTF-8)";
>  binmode STDOUT, ":encoding(UTF-8)";
>
>  use URI::Escape;
> -use IPC::Open2;
>  use Readonly;
>
>  # Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
> @@ -338,7 +337,8 @@ sub get_mw_pages {
>  sub run_git {
>         my $args = shift;
>         my $encoding = (shift || "encoding(UTF-8)");
> -       open(my $git, "-|:$encoding", "git " . $args);
> +       open(my $git, "-|:$encoding", "git " . $args)
> +           or die "Unable to open: $!\n";
>         my $res = do {
>                 local $/ = undef;
>                 <$git>

These two changes are unrelated and could be split into distinct
patches (IMHO, though others may disagree).

Re: [PATCH v2 14/22] git-remote-mediawiki: Check return value of open + remove import of unused open2

[Célestin Matte]

Le 08/06/2013 02:14, Eric Sunshine a écrit :
> These two changes are unrelated and could be split into distinct
> patches (IMHO, though others may disagree).

Two distinct patches or two distinct commits?
I assumed it was two distinct commits, but thinking about it, removing a
library could have its own patch.

-- 
Célestin Matte

Re: [PATCH v2 14/22] git-remote-mediawiki: Check return value of open + remove import of unused open2

[Matthieu Moy]

Célestin Matte <celestin.matte@ensimag.fr> writes:

> Le 08/06/2013 02:14, Eric Sunshine a écrit :
>> These two changes are unrelated and could be split into distinct
>> patches (IMHO, though others may disagree).
>
> Two distinct patches or two distinct commits?

That's the same. You write commits locally, send them as patches, and
Junio uses "git am" to turn the patches back into commits.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

Re: [PATCH v2 14/22] git-remote-mediawiki: Check return value of open + remove import of unused open2

[Célestin Matte]

Le 08/06/2013 20:41, Matthieu Moy a écrit :
> Célestin Matte <celestin.matte@ensimag.fr> writes:
> 
>> Le 08/06/2013 02:14, Eric Sunshine a écrit :
>>> These two changes are unrelated and could be split into distinct
>>> patches (IMHO, though others may disagree).
>>
>> Two distinct patches or two distinct commits?
> 
> That's the same. You write commits locally, send them as patches, and
> Junio uses "git am" to turn the patches back into commits.
> 

Oh, I thought a part of a patch was called a commit. So the question was
rather: "Should it be sent to this list independently from this series
of patches?".

-- 
Célestin Matte

Re: [PATCH v2 14/22] git-remote-mediawiki: Check return value of open + remove import of unused open2

[Matthieu Moy]

Célestin Matte <celestin.matte@ensimag.fr> writes:

> Oh, I thought a part of a patch was called a commit.

1 patch = 1 commit
1 patch series = several commits sent together. Will normally end-up in
                 a branch in Junio's repo (named with <initials>/<topic>)

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

Re: [PATCH v2 14/22] git-remote-mediawiki: Check return value of open + remove import of unused open2

[Eric Sunshine]

On Sat, Jun 8, 2013 at 2:45 PM, Célestin Matte
<celestin.matte@ensimag.fr> wrote:
> Le 08/06/2013 20:41, Matthieu Moy a écrit :
>> Célestin Matte <celestin.matte@ensimag.fr> writes:
>>
>>> Le 08/06/2013 02:14, Eric Sunshine a écrit :
>>>> These two changes are unrelated and could be split into distinct
>>>> patches (IMHO, though others may disagree).
>>>
>>> Two distinct patches or two distinct commits?
>>
>> That's the same. You write commits locally, send them as patches, and
>> Junio uses "git am" to turn the patches back into commits.
>>
>
> Oh, I thought a part of a patch was called a commit. So the question was
> rather: "Should it be sent to this list independently from this series
> of patches?".

Terms "patch" and "commit" tend to be used interchangeably, as Matthieu notes.

There is no need to send the split up patches to the list
independently from this series.

[PATCH v2 15/22] git-remote-mediawiki: Put long code into a subroutine

[Célestin Matte]

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   42 +++++++++++++++++----------
 1 file changed, 26 insertions(+), 16 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 1c34ada..f37488b 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -133,22 +133,7 @@ while (<STDIN>) {
 	@cmd = split(/ /);
 	if (defined($cmd[0])) {
 		# Line not blank
-		if ($cmd[0] eq "capabilities") {
-			die("Too many arguments for capabilities\n") if (defined($cmd[1]));
-			mw_capabilities();
-		} elsif ($cmd[0] eq "list") {
-			die("Too many arguments for list\n") if (defined($cmd[2]));
-			mw_list($cmd[1]);
-		} elsif ($cmd[0] eq "import") {
-			die("Invalid arguments for import\n") if ($cmd[1] eq "" || defined($cmd[2]));
-			mw_import($cmd[1]);
-		} elsif ($cmd[0] eq "option") {
-			die("Too many arguments for option\n") if ($cmd[1] eq "" || $cmd[2] eq "" || defined($cmd[3]));
-			mw_option($cmd[1],$cmd[2]);
-		} elsif ($cmd[0] eq "push") {
-			mw_push($cmd[1]);
-		} else {
-			print STDERR "Unknown command. Aborting...\n";
+		if (parse_commands() == 1) {
 			last;
 		}
 	} else {
@@ -168,6 +153,31 @@ sub exit_error_usage {
     die "ERROR: git-remote-mediawiki module was not called with a correct number of parameters\n";
 }
 
+sub parse_commands {
+	if ($cmd[0] eq "capabilities") {
+		die("Too many arguments for capabilities\n")
+		    if (defined($cmd[1]));
+		mw_capabilities();
+	} elsif ($cmd[0] eq "list") {
+		die("Too many arguments for list\n") if (defined($cmd[2]));
+		mw_list($cmd[1]);
+	} elsif ($cmd[0] eq "import") {
+		die("Invalid arguments for import\n")
+		    if ($cmd[1] eq "" || defined($cmd[2]));
+		mw_import($cmd[1]);
+	} elsif ($cmd[0] eq "option") {
+		die("Too many arguments for option\n")
+		    if ($cmd[1] eq "" || $cmd[2] eq "" || defined($cmd[3]));
+		mw_option($cmd[1],$cmd[2]);
+	} elsif ($cmd[0] eq "push") {
+		mw_push($cmd[1]);
+	} else {
+		print STDERR "Unknown command. Aborting...\n";
+		return 1;
+	}
+	return 0;
+}
+
 # MediaWiki API instance, created lazily.
 my $mediawiki;
 
-- 
1.7.9.5

Re: [PATCH v2 15/22] git-remote-mediawiki: Put long code into a subroutine

[Eric Sunshine]

On Fri, Jun 7, 2013 at 5:42 PM, Célestin Matte
<celestin.matte@ensimag.fr> wrote:
> Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
> Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
> ---
>  contrib/mw-to-git/git-remote-mediawiki.perl |   42 +++++++++++++++++----------
>  1 file changed, 26 insertions(+), 16 deletions(-)
>
> diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
> index 1c34ada..f37488b 100755
> --- a/contrib/mw-to-git/git-remote-mediawiki.perl
> +++ b/contrib/mw-to-git/git-remote-mediawiki.perl
> @@ -133,22 +133,7 @@ while (<STDIN>) {
>         @cmd = split(/ /);
>         if (defined($cmd[0])) {
>                 # Line not blank
> -               if ($cmd[0] eq "capabilities") {
> -                       die("Too many arguments for capabilities\n") if (defined($cmd[1]));
> -                       mw_capabilities();
> -               } elsif ($cmd[0] eq "list") {
> -                       die("Too many arguments for list\n") if (defined($cmd[2]));
> -                       mw_list($cmd[1]);
> -               } elsif ($cmd[0] eq "import") {
> -                       die("Invalid arguments for import\n") if ($cmd[1] eq "" || defined($cmd[2]));
> -                       mw_import($cmd[1]);
> -               } elsif ($cmd[0] eq "option") {
> -                       die("Too many arguments for option\n") if ($cmd[1] eq "" || $cmd[2] eq "" || defined($cmd[3]));
> -                       mw_option($cmd[1],$cmd[2]);
> -               } elsif ($cmd[0] eq "push") {
> -                       mw_push($cmd[1]);
> -               } else {
> -                       print STDERR "Unknown command. Aborting...\n";
> +               if (parse_commands() == 1) {
>                         last;

Better. A few minor nits:

The new subroutine is only parsing/invoking a single command at a time
from the input line rather than multiple commands, so the name
parse_commands() is slightly misleading. Perhaps parse_command() would
be more appropriate.

Now that the functionality has been pushed into a subroutine, it does
not necessarily need to be accessing global @cmd. It might be
appropriate to pass @cmd as an argument to parse_command() (or not
depending upon your preference).

The "Unknown command. Aborting" case indicates a failure. It's pretty
typical for failures to return false rather than true. The resulting
conditional would then read a bit more idiomatically:

  if (!parse_command(\@cmd)) {
    last;
  }

>                 }
>         } else {
> @@ -168,6 +153,31 @@ sub exit_error_usage {
>      die "ERROR: git-remote-mediawiki module was not called with a correct number of parameters\n";
>  }
>
> +sub parse_commands {
> +       if ($cmd[0] eq "capabilities") {
> +               die("Too many arguments for capabilities\n")
> +                   if (defined($cmd[1]));
> +               mw_capabilities();
> +       } elsif ($cmd[0] eq "list") {
> +               die("Too many arguments for list\n") if (defined($cmd[2]));
> +               mw_list($cmd[1]);
> +       } elsif ($cmd[0] eq "import") {
> +               die("Invalid arguments for import\n")
> +                   if ($cmd[1] eq "" || defined($cmd[2]));
> +               mw_import($cmd[1]);
> +       } elsif ($cmd[0] eq "option") {
> +               die("Too many arguments for option\n")
> +                   if ($cmd[1] eq "" || $cmd[2] eq "" || defined($cmd[3]));
> +               mw_option($cmd[1],$cmd[2]);
> +       } elsif ($cmd[0] eq "push") {
> +               mw_push($cmd[1]);
> +       } else {
> +               print STDERR "Unknown command. Aborting...\n";
> +               return 1;
> +       }
> +       return 0;
> +}
> +
>  # MediaWiki API instance, created lazily.
>  my $mediawiki;
>
> --

[PATCH v2 16/22] git-remote-mediawiki: Modify strings for a better coding-style

[Célestin Matte]

- strings which don't need interpolation are single-quoted for more clarity and
slight gain of performance
- interpolation is preferred over concatenation in many cases, for more clarity
- variables are always used with the ${} operator inside strings
- strings including double-quotes are written with qq() so that the quotes do
not have to be escaped

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>

Conflicts:

	contrib/mw-to-git/git-remote-mediawiki.perl
---
 contrib/mw-to-git/git-remote-mediawiki.perl |  244 +++++++++++++--------------
 1 file changed, 121 insertions(+), 123 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index f37488b..2d4ea1d 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -18,14 +18,14 @@ use DateTime::Format::ISO8601;
 use warnings;
 
 # By default, use UTF-8 to communicate with Git and the user
-binmode STDERR, ":encoding(UTF-8)";
-binmode STDOUT, ":encoding(UTF-8)";
+binmode STDERR, ':encoding(UTF-8)';
+binmode STDOUT, ':encoding(UTF-8)';
 
 use URI::Escape;
 use Readonly;
 
 # Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
-Readonly my $SLASH_REPLACEMENT => "%2F";
+Readonly my $SLASH_REPLACEMENT => '%2F';
 
 # It's not always possible to delete pages (may require some
 # privileges). Deleted pages are replaced with this content.
@@ -36,7 +36,7 @@ Readonly my $DELETED_CONTENT => "[[Category:Deleted]]\n";
 Readonly my $EMPTY_CONTENT => "<!-- empty page -->\n";
 
 # used to reflect file creation or deletion in diff.
-Readonly my $NULL_SHA1 => "0000000000000000000000000000000000000000";
+Readonly my $NULL_SHA1 => '0000000000000000000000000000000000000000';
 
 # Used on Git's side to reflect empty edit messages on the wiki
 Readonly my $EMPTY_MESSAGE => '*Empty MediaWiki Message*';
@@ -50,35 +50,35 @@ my $url = $ARGV[1];
 
 # Accept both space-separated and multiple keys in config file.
 # Spaces should be written as _ anyway because we'll use chomp.
-my @tracked_pages = split(/[ \n]/, run_git("config --get-all remote.". $remotename .".pages"));
+my @tracked_pages = split(/[ \n]/, run_git("config --get-all remote.${remotename}.pages"));
 chomp(@tracked_pages);
 
 # Just like @tracked_pages, but for MediaWiki categories.
-my @tracked_categories = split(/[ \n]/, run_git("config --get-all remote.". $remotename .".categories"));
+my @tracked_categories = split(/[ \n]/, run_git("config --get-all remote.${remotename}.categories"));
 chomp(@tracked_categories);
 
 # Import media files on pull
-my $import_media = run_git("config --get --bool remote.". $remotename .".mediaimport");
+my $import_media = run_git("config --get --bool remote.${remotename}.mediaimport");
 chomp($import_media);
-$import_media = ($import_media eq "true");
+$import_media = ($import_media eq 'true');
 
 # Export media files on push
-my $export_media = run_git("config --get --bool remote.". $remotename .".mediaexport");
+my $export_media = run_git("config --get --bool remote.${remotename}.mediaexport");
 chomp($export_media);
-$export_media = !($export_media eq "false");
+$export_media = !($export_media eq 'false');
 
-my $wiki_login = run_git("config --get remote.". $remotename .".mwLogin");
+my $wiki_login = run_git("config --get remote.${remotename}.mwLogin");
 # Note: mwPassword is discourraged. Use the credential system instead.
-my $wiki_passwd = run_git("config --get remote.". $remotename .".mwPassword");
-my $wiki_domain = run_git("config --get remote.". $remotename .".mwDomain");
+my $wiki_passwd = run_git("config --get remote.${remotename}.mwPassword");
+my $wiki_domain = run_git("config --get remote.${remotename}.mwDomain");
 chomp($wiki_login);
 chomp($wiki_passwd);
 chomp($wiki_domain);
 
 # Import only last revisions (both for clone and fetch)
-my $shallow_import = run_git("config --get --bool remote.". $remotename .".shallow");
+my $shallow_import = run_git("config --get --bool remote.${remotename}.shallow");
 chomp($shallow_import);
-$shallow_import = ($shallow_import eq "true");
+$shallow_import = ($shallow_import eq 'true');
 
 # Fetch (clone and pull) by revisions instead of by pages. This behavior
 # is more efficient when we have a wiki with lots of pages and we fetch
@@ -86,13 +86,13 @@ $shallow_import = ($shallow_import eq "true");
 # Possible values:
 # - by_rev: perform one query per new revision on the remote wiki
 # - by_page: query each tracked page for new revision
-my $fetch_strategy = run_git("config --get remote.$remotename.fetchStrategy");
+my $fetch_strategy = run_git("config --get remote.${remotename}.fetchStrategy");
 unless ($fetch_strategy) {
-	$fetch_strategy = run_git("config --get mediawiki.fetchStrategy");
+	$fetch_strategy = run_git('config --get mediawiki.fetchStrategy');
 }
 chomp($fetch_strategy);
 unless ($fetch_strategy) {
-	$fetch_strategy = "by_page";
+	$fetch_strategy = 'by_page';
 }
 
 # Remember the timestamp corresponding to a revision id.
@@ -112,12 +112,12 @@ my %basetimestamps;
 # will get the history with information lost). If the import is
 # deterministic, this means everybody gets the same sha1 for each
 # MediaWiki revision.
-my $dumb_push = run_git("config --get --bool remote.$remotename.dumbPush");
+my $dumb_push = run_git("config --get --bool remote.${remotename}.dumbPush");
 unless ($dumb_push) {
-	$dumb_push = run_git("config --get --bool mediawiki.dumbPush");
+	$dumb_push = run_git('config --get --bool mediawiki.dumbPush');
 }
 chomp($dumb_push);
-$dumb_push = ($dumb_push eq "true");
+$dumb_push = ($dumb_push eq 'true');
 
 my $wiki_name = $url;
 $wiki_name =~ s{[^/]*://}{};
@@ -154,22 +154,22 @@ sub exit_error_usage {
 }
 
 sub parse_commands {
-	if ($cmd[0] eq "capabilities") {
+	if ($cmd[0] eq 'capabilities') {
 		die("Too many arguments for capabilities\n")
 		    if (defined($cmd[1]));
 		mw_capabilities();
-	} elsif ($cmd[0] eq "list") {
+	} elsif ($cmd[0] eq 'list') {
 		die("Too many arguments for list\n") if (defined($cmd[2]));
 		mw_list($cmd[1]);
-	} elsif ($cmd[0] eq "import") {
+	} elsif ($cmd[0] eq 'import') {
 		die("Invalid arguments for import\n")
 		    if ($cmd[1] eq "" || defined($cmd[2]));
 		mw_import($cmd[1]);
-	} elsif ($cmd[0] eq "option") {
+	} elsif ($cmd[0] eq 'option') {
 		die("Too many arguments for option\n")
 		    if ($cmd[1] eq "" || $cmd[2] eq "" || defined($cmd[3]));
 		mw_option($cmd[1],$cmd[2]);
-	} elsif ($cmd[0] eq "push") {
+	} elsif ($cmd[0] eq 'push') {
 		mw_push($cmd[1]);
 	} else {
 		print STDERR "Unknown command. Aborting...\n";
@@ -186,7 +186,7 @@ sub mw_connect_maybe {
 		return;
 	}
 	$mediawiki = MediaWiki::API->new;
-	$mediawiki->{config}->{api_url} = "$url/api.php";
+	$mediawiki->{config}->{api_url} = "${url}/api.php";
 	if ($wiki_login) {
 		my %credential = (
 			'url' => $url,
@@ -199,10 +199,10 @@ sub mw_connect_maybe {
 			       lgdomain => $wiki_domain};
 		if ($mediawiki->login($request)) {
 			Git::credential \%credential, 'approve';
-			print STDERR "Logged in mediawiki user \"$credential{username}\".\n";
+			print STDERR qq(Logged in mediawiki user "$credential{username}".\n);
 		} else {
-			print STDERR "Failed to log in mediawiki user \"$credential{username}\" on $url\n";
-			print STDERR "  (error " .
+			print {*STDERR} qq(Failed to log in mediawiki user "$credential{username}" on ${url}\n);
+			print {*STDERR} '  (error ' .
 				$mediawiki->{error}->{code} . ': ' .
 				$mediawiki->{error}->{details} . ")\n";
 			Git::credential \%credential, 'reject';
@@ -242,7 +242,7 @@ sub get_mw_tracked_categories {
 			# Mediawiki requires the Category
 			# prefix, but let's not force the user
 			# to specify it.
-			$category = "Category:" . $category;
+			$category = "Category:${category}";
 		}
 		my $mw_pages = $mediawiki->list( {
 			action => 'query',
@@ -268,8 +268,8 @@ sub get_mw_all_pages {
 	});
 	if (!defined($mw_pages)) {
 		print STDERR "fatal: could not get the list of wiki pages.\n";
-		print STDERR "fatal: '$url' does not appear to be a mediawiki\n";
-		print STDERR "fatal: make sure '$url/api.php' is a valid page.\n";
+		print STDERR "fatal: '${url}' does not appear to be a mediawiki\n";
+		print STDERR "fatal: make sure '${url}/api.php' is a valid page.\n";
 		exit 1;
 	}
 	foreach my $page (@{$mw_pages}) {
@@ -295,8 +295,8 @@ sub get_mw_first_pages {
 	});
 	if (!defined($mw_pages)) {
 		print STDERR "fatal: could not query the list of wiki pages.\n";
-		print STDERR "fatal: '$url' does not appear to be a mediawiki\n";
-		print STDERR "fatal: make sure '$url/api.php' is a valid page.\n";
+		print STDERR "fatal: '${url}' does not appear to be a mediawiki\n";
+		print STDERR "fatal: make sure '${url}/api.php' is a valid page.\n";
 		exit 1;
 	}
 	while (my ($id, $page) = each(%{$mw_pages->{query}->{pages}})) {
@@ -346,10 +346,10 @@ sub get_mw_pages {
 #        $out = run_git("command args", "raw"); # don't interpret output as UTF-8.
 sub run_git {
 	my $args = shift;
-	my $encoding = (shift || "encoding(UTF-8)");
-	open(my $git, "-|:$encoding", "git " . $args)
-	    or die "Unable to open: $!\n";
-	my $res = do { 
+	my $encoding = (shift || 'encoding(UTF-8)');
+	open(my $git, "-|:${encoding}", "git ${args}")
+	    or die "Unable to fork: $!\n";
+	my $res = do {
 		local $/ = undef;
 		<$git>
 	};
@@ -367,7 +367,7 @@ sub get_all_mediafiles {
 	my $mw_pages = $mediawiki->list({
 		action => 'query',
 		list => 'allpages',
-		apnamespace => get_mw_namespace_id("File"),
+		apnamespace => get_mw_namespace_id('File'),
 		aplimit => 'max'
 	});
 	if (!defined($mw_pages)) {
@@ -404,7 +404,7 @@ sub get_linked_mediafiles {
 			action => 'query',
 			prop => 'links|images',
 			titles => $mw_titles,
-			plnamespace => get_mw_namespace_id("File"),
+			plnamespace => get_mw_namespace_id('File'),
 			pllimit => 'max'
 		};
 		my $result = $mediawiki->api($query);
@@ -442,7 +442,7 @@ sub get_mw_mediafile_for_page_revision {
 	my $query = {
 		action => 'query',
 		prop => 'imageinfo',
-		titles => "File:" . $filename,
+		titles => "File:${filename}",
 		iistart => $timestamp,
 		iiend => $timestamp,
 		iiprop => 'timestamp|archivename|url',
@@ -473,27 +473,27 @@ sub download_mw_mediafile {
 	if ($response->code == 200) {
 		return $response->decoded_content;
 	} else {
-		print STDERR "Error downloading mediafile from :\n";
-		print STDERR "URL: $download_url\n";
-		print STDERR "Server response: " . $response->code . " " . $response->message . "\n";
+		print {*STDERR} "Error downloading mediafile from :\n";
+		print {*STDERR} "URL: ${download_url}\n";
+		print {*STDERR} 'Server response: ' . $response->code . q{ } . $response->message . "\n";
 		exit 1;
 	}
 }
 
 sub get_last_local_revision {
 	# Get note regarding last mediawiki revision
-	my $note = run_git("notes --ref=$remotename/mediawiki show refs/mediawiki/$remotename/master 2>/dev/null");
+	my $note = run_git("notes --ref=${remotename}/mediawiki show refs/mediawiki/${remotename}/master 2>/dev/null");
 	my @note_info = split(/ /, $note);
 
 	my $lastrevision_number;
-	if (!(defined($note_info[0]) && $note_info[0] eq "mediawiki_revision:")) {
-		print STDERR "No previous mediawiki revision found";
+	if (!(defined($note_info[0]) && $note_info[0] eq 'mediawiki_revision:')) {
+		print STDERR 'No previous mediawiki revision found';
 		$lastrevision_number = 0;
 	} else {
 		# Notes are formatted : mediawiki_revision: #number
 		$lastrevision_number = $note_info[1];
 		chomp($lastrevision_number);
-		print STDERR "Last local mediawiki revision found is $lastrevision_number";
+		print STDERR "Last local mediawiki revision found is ${lastrevision_number}";
 	}
 	return $lastrevision_number;
 }
@@ -572,7 +572,7 @@ sub mediawiki_smudge {
 		$string = "";
 	}
 	# This \n is important. This is due to mediawiki's way to handle end of files.
-	return $string."\n";
+	return "${string}\n";
 }
 
 sub mediawiki_clean_filename {
@@ -594,13 +594,13 @@ sub mediawiki_smudge_filename {
 	$filename =~ s{/}{$SLASH_REPLACEMENT}g;
 	$filename =~ s/ /_/g;
 	# Decode forbidden characters encoded in mediawiki_clean_filename
-	$filename =~ s/_%_([0-9a-fA-F][0-9a-fA-F])/sprintf("%c", hex($1))/ge;
+	$filename =~ s/_%_([0-9a-fA-F][0-9a-fA-F])/sprintf('%c', hex($1))/ge;
 	return $filename;
 }
 
 sub literal_data {
 	my ($content) = @_;
-	print STDOUT "data ", bytes::length($content), "\n", $content;
+	print STDOUT 'data ', bytes::length($content), "\n", $content;
 	return;
 }
 
@@ -619,7 +619,7 @@ sub mw_capabilities {
 	# Revisions are imported to the private namespace
 	# refs/mediawiki/$remotename/ by the helper and fetched into
 	# refs/remotes/$remotename later by fetch.
-	print STDOUT "refspec refs/heads/*:refs/mediawiki/$remotename/*\n";
+	print STDOUT "refspec refs/heads/*:refs/mediawiki/${remotename}/*\n";
 	print STDOUT "import\n";
 	print STDOUT "list\n";
 	print STDOUT "push\n";
@@ -678,7 +678,7 @@ sub fetch_mw_revisions_for_page {
 		@page_revs = sort {$b->{revid} <=> $a->{revid}} (@page_revs);
 		return $page_revs[0];
 	}
-	print STDERR "  Found ", $revnum, " revision(s).\n";
+	print STDERR "  Found ${revnum} revision(s).\n";
 	return @page_revs;
 }
 
@@ -690,8 +690,7 @@ sub fetch_mw_revisions {
 	my $n = 1;
 	foreach my $page (@pages) {
 		my $id = $page->{pageid};
-
-		print STDERR "page $n/", scalar(@pages), ": ". $page->{title} ."\n";
+		print {*STDERR} "page ${n}/", scalar(@pages), ': ', $page->{title}, "\n";
 		$n++;
 		my @page_revs = fetch_mw_revisions_for_page($page, $id, $fetch_from);
 		@revisions = (@page_revs, @revisions);
@@ -705,7 +704,7 @@ sub fe_escape_path {
     $path =~ s/\\/\\\\/g;
     $path =~ s/"/\\"/g;
     $path =~ s/\n/\\n/g;
-    return '"' . $path . '"';
+    return qq("${path}");
 }
 
 sub import_file_revision {
@@ -725,41 +724,41 @@ sub import_file_revision {
 	my $author = $commit{author};
 	my $date = $commit{date};
 
-	print STDOUT "commit refs/mediawiki/$remotename/master\n";
-	print STDOUT "mark :$n\n";
-	print STDOUT "committer $author <$author\@$wiki_name> ", $date->epoch, " +0000\n";
+	print STDOUT "commit refs/mediawiki/${remotename}/master\n";
+	print STDOUT "mark :${n}\n";
+	print STDOUT "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
 	literal_data($comment);
 
 	# If it's not a clone, we need to know where to start from
 	if (!$full_import && $n == 1) {
-		print STDOUT "from refs/mediawiki/$remotename/master^0\n";
+		print STDOUT "from refs/mediawiki/${remotename}/master^0\n";
 	}
 	if ($content ne $DELETED_CONTENT) {
-		print STDOUT "M 644 inline " .
-		    fe_escape_path($title . ".mw") . "\n";
+		print {*STDOUT} 'M 644 inline ' .
+		    fe_escape_path("${title}.mw") . "\n";
 		literal_data($content);
 		if (%mediafile) {
-			print STDOUT "M 644 inline "
+			print STDOUT 'M 644 inline '
 			    . fe_escape_path($mediafile{title}) . "\n";
 			literal_data_raw($mediafile{content});
 		}
 		print STDOUT "\n\n";
 	} else {
-		print STDOUT "D " . fe_escape_path($title . ".mw") . "\n";
+		print STDOUT 'D ' . fe_escape_path("${title}.mw") . "\n";
 	}
 
 	# mediawiki revision number in the git note
 	if ($full_import && $n == 1) {
-		print STDOUT "reset refs/notes/$remotename/mediawiki\n";
+		print STDOUT "reset refs/notes/${remotename}/mediawiki\n";
 	}
-	print STDOUT "commit refs/notes/$remotename/mediawiki\n";
-	print STDOUT "committer $author <$author\@$wiki_name> ", $date->epoch, " +0000\n";
-	literal_data("Note added by git-mediawiki during import");
+	print STDOUT "commit refs/notes/${remotename}/mediawiki\n";
+	print STDOUT "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
+	literal_data('Note added by git-mediawiki during import');
 	if (!$full_import && $n == 1) {
-		print STDOUT "from refs/notes/$remotename/mediawiki^0\n";
+		print STDOUT "from refs/notes/${remotename}/mediawiki^0\n";
 	}
-	print STDOUT "N inline :$n\n";
-	literal_data("mediawiki_revision: " . $commit{mw_revision});
+	print STDOUT "N inline :${n}\n";
+	literal_data("mediawiki_revision: $commit{mw_revision}");
 	print STDOUT "\n\n";
 	return;
 }
@@ -787,7 +786,7 @@ sub get_more_refs {
 
 sub mw_import {
 	# multiple import commands can follow each other.
-	my @refs = (shift, get_more_refs("import"));
+	my @refs = (shift, get_more_refs('import'));
 	foreach my $ref (@refs) {
 		mw_import_ref($ref);
 	}
@@ -802,7 +801,7 @@ sub mw_import_ref {
 	# Since HEAD is a symbolic ref to master (by convention,
 	# followed by the output of the command "list" that we gave),
 	# we don't need to do anything in this case.
-	if ($ref eq "HEAD") {
+	if ($ref eq 'HEAD') {
 		return;
 	}
 
@@ -818,15 +817,15 @@ sub mw_import_ref {
 	}
 
 	my $n = 0;
-	if ($fetch_strategy eq "by_rev") {
+	if ($fetch_strategy eq 'by_rev') {
 		print STDERR "Fetching & writing export data by revs...\n";
 		$n = mw_import_ref_by_revs($fetch_from);
-	} elsif ($fetch_strategy eq "by_page") {
+	} elsif ($fetch_strategy eq 'by_page') {
 		print STDERR "Fetching & writing export data by pages...\n";
 		$n = mw_import_ref_by_pages($fetch_from);
 	} else {
-		print STDERR "fatal: invalid fetch strategy \"$fetch_strategy\".\n";
-		print STDERR "Check your configuration variables remote.$remotename.fetchStrategy and mediawiki.fetchStrategy\n";
+		print STDERR qq(fatal: invalid fetch strategy "${fetch_strategy}".\n);
+		print STDERR "Check your configuration variables remote.${remotename}.fetchStrategy and mediawiki.fetchStrategy\n";
 		exit 1;
 	}
 
@@ -900,7 +899,7 @@ sub mw_import_revids {
 		}
 
 		if (!defined($result->{query}->{pages})) {
-			die "Invalid revision $pagerevid.\n";
+			die "Invalid revision ${pagerevid}.\n";
 		}
 
 		my @result_pages = values(%{$result->{query}->{pages}});
@@ -910,8 +909,8 @@ sub mw_import_revids {
 		my $page_title = $result_page->{title};
 
 		if (!exists($pages->{$page_title})) {
-			print STDERR "$n/", scalar(@$revision_ids),
-				": Skipping revision #$rev->{revid} of $page_title\n";
+			print STDERR "${n}/", scalar(@$revision_ids),
+				": Skipping revision #$rev->{revid} of ${page_title}\n";
 			next;
 		}
 
@@ -936,14 +935,14 @@ sub mw_import_revids {
 		my %mediafile;
 		if ($namespace) {
 			my $id = get_mw_namespace_id($namespace);
-			if ($id && $id == get_mw_namespace_id("File")) {
+			if ($id && $id == get_mw_namespace_id('File')) {
 				%mediafile = get_mw_mediafile_for_page_revision($filename, $rev->{timestamp});
 			}
 		}
 		# If this is a revision of the media page for new version
 		# of a file do one common commit for both file and media page.
 		# Else do commit only for that page.
-		print STDERR "$n/", scalar(@$revision_ids), ": Revision #$rev->{revid} of $commit{title}\n";
+		print STDERR "${n}/", scalar(@$revision_ids), ": Revision #$rev->{revid} of $commit{title}\n";
 		import_file_revision(\%commit, ($fetch_from == 1), $n_actual, \%mediafile);
 	}
 
@@ -951,9 +950,9 @@ sub mw_import_revids {
 }
 
 sub error_non_fast_forward {
-	my $advice = run_git("config --bool advice.pushNonFastForward");
+	my $advice = run_git('config --bool advice.pushNonFastForward');
 	chomp($advice);
-	if ($advice ne "false") {
+	if ($advice ne 'false') {
 		# Native git-push would show this after the summary.
 		# We can't ask it to display it cleanly, so print it
 		# ourselves before.
@@ -961,7 +960,7 @@ sub error_non_fast_forward {
 		print STDERR "Merge the remote changes (e.g. 'git pull') before pushing again. See the\n";
 		print STDERR "'Note about fast-forwards' section of 'git push --help' for details.\n";
 	}
-	print STDOUT "error $_[0] \"non-fast-forward\"\n";
+	print STDOUT qq(error $_[0] "non-fast-forward"\n);
 	return 0;
 }
 
@@ -972,10 +971,10 @@ sub mw_upload_file {
 	my $file_deleted = shift;
 	my $summary = shift;
 	my $newrevid;
-	my $path = "File:" . $complete_file_name;
+	my $path = "File:${complete_file_name}";
 	my %hashFiles = get_allowed_file_extensions();
 	if (!exists($hashFiles{$extension})) {
-		print STDERR "$complete_file_name is not a permitted file on this wiki.\n";
+		print STDERR "${complete_file_name} is not a permitted file on this wiki.\n";
 		print STDERR "Check the configuration of file uploads in your mediawiki.\n";
 		return $newrevid;
 	}
@@ -995,11 +994,11 @@ sub mw_upload_file {
 		}
 	} else {
 		# Don't let perl try to interpret file content as UTF-8 => use "raw"
-		my $content = run_git("cat-file blob $new_sha1", "raw");
+		my $content = run_git("cat-file blob ${new_sha1}", 'raw');
 		if ($content ne "") {
 			mw_connect_maybe();
 			$mediawiki->{config}->{upload_url} =
-				"$url/index.php/Special:Upload";
+				"${url}/index.php/Special:Upload";
 			$mediawiki->edit({
 				action => 'upload',
 				filename => $complete_file_name,
@@ -1014,9 +1013,9 @@ sub mw_upload_file {
 				 . $mediawiki->{error}->{details} . "\n";
 			my $last_file_page = $mediawiki->get_page({title => $path});
 			$newrevid = $last_file_page->{revid};
-			print STDERR "Pushed file: $new_sha1 - $complete_file_name.\n";
+			print STDERR "Pushed file: ${new_sha1} - ${complete_file_name}.\n";
 		} else {
-			print STDERR "Empty file $complete_file_name not pushed.\n";
+			print STDERR "Empty file ${complete_file_name} not pushed.\n";
 		}
 	}
 	return $newrevid;
@@ -1051,11 +1050,11 @@ sub mw_push_file {
 	if (!defined($extension)) {
 		$extension = "";
 	}
-	if ($extension eq "mw") {
+	if ($extension eq 'mw') {
 		my $ns = get_mw_namespace_id_for_page($complete_file_name);
-		if ($ns && $ns == get_mw_namespace_id("File") && (!$export_media)) {
-			print STDERR "Ignoring media file related page: $complete_file_name\n";
-			return ($oldrevid, "ok");
+		if ($ns && $ns == get_mw_namespace_id('File') && (!$export_media)) {
+			print STDERR "Ignoring media file related page: ${complete_file_name}\n";
+			return ($oldrevid, 'ok');
 		}
 		my $file_content;
 		if ($page_deleted) {
@@ -1065,7 +1064,7 @@ sub mw_push_file {
 			# with this content instead:
 			$file_content = $DELETED_CONTENT;
 		} else {
-			$file_content = run_git("cat-file blob $new_sha1");
+			$file_content = run_git("cat-file blob ${new_sha1}");
 		}
 
 		mw_connect_maybe();
@@ -1086,7 +1085,7 @@ sub mw_push_file {
 				    $mediawiki->{error}->{code} .
 				    ' from mediwiki: ' . $mediawiki->{error}->{details} .
 				    ".\n";
-				return ($oldrevid, "non-fast-forward");
+				return ($oldrevid, 'non-fast-forward');
 			} else {
 				# Other errors. Shouldn't happen => just die()
 				die 'Fatal: Error ' .
@@ -1095,21 +1094,21 @@ sub mw_push_file {
 			}
 		}
 		$newrevid = $result->{edit}->{newrevid};
-		print STDERR "Pushed file: $new_sha1 - $title\n";
+		print STDERR "Pushed file: ${new_sha1} - ${title}\n";
 	} elsif ($export_media) {
 		$newrevid = mw_upload_file($complete_file_name, $new_sha1,
 					   $extension, $page_deleted,
 					   $summary);
 	} else {
-		print STDERR "Ignoring media file $title\n";
+		print STDERR "Ignoring media file ${title}\n";
 	}
 	$newrevid = ($newrevid or $oldrevid);
-	return ($newrevid, "ok");
+	return ($newrevid, 'ok');
 }
 
 sub mw_push {
 	# multiple push statements can follow each other
-	my @refsspecs = (shift, get_more_refs("push"));
+	my @refsspecs = (shift, get_more_refs('push'));
 	my $pushed;
 	for my $refspec (@refsspecs) {
 		my ($force, $local, $remote) = $refspec =~ /^(\+)?([^:]*):([^:]*)$/
@@ -1119,12 +1118,12 @@ sub mw_push {
 		}
 		if ($local eq "") {
 			print STDERR "Cannot delete remote branch on a MediaWiki\n";
-			print STDOUT "error $remote cannot delete\n";
+			print STDOUT "error ${remote} cannot delete\n";
 			next;
 		}
-		if ($remote ne "refs/heads/master") {
+		if ($remote ne 'refs/heads/master') {
 			print STDERR "Only push to the branch 'master' is supported on a MediaWiki\n";
-			print STDOUT "error $remote only master allowed\n";
+			print STDOUT "error ${remote} only master allowed\n";
 			next;
 		}
 		if (mw_push_revision($local, $remote)) {
@@ -1155,9 +1154,10 @@ sub mw_push_revision {
 	my $mw_revision = $last_remote_revid;
 
 	# Get sha1 of commit pointed by local HEAD
-	my $HEAD_sha1 = run_git("rev-parse $local 2>/dev/null"); chomp($HEAD_sha1);
+	my $HEAD_sha1 = run_git("rev-parse ${local} 2>/dev/null");
+	chomp($HEAD_sha1);
 	# Get sha1 of commit pointed by remotes/$remotename/master
-	my $remoteorigin_sha1 = run_git("rev-parse refs/remotes/$remotename/master 2>/dev/null");
+	my $remoteorigin_sha1 = run_git("rev-parse refs/remotes/${remotename}/master 2>/dev/null");
 	chomp($remoteorigin_sha1);
 
 	if ($last_local_revid > 0 &&
@@ -1177,7 +1177,7 @@ sub mw_push_revision {
 		my $parsed_sha1 = $remoteorigin_sha1;
 		# Find a path from last MediaWiki commit to pushed commit
 		print STDERR "Computing path from local to remote ...\n";
-		my @local_ancestry = split(/\n/, run_git("rev-list --boundary --parents $local ^$parsed_sha1"));
+		my @local_ancestry = split(/\n/, run_git("rev-list --boundary --parents ${local} ^${parsed_sha1}"));
 		my %local_ancestry;
 		foreach my $line (@local_ancestry) {
 			if (my ($child, $parents) = $line =~ /^-?([a-f0-9]+) ([a-f0-9 ]+)/) {
@@ -1185,7 +1185,7 @@ sub mw_push_revision {
 					$local_ancestry{$parent} = $child;
 				}
 			} elsif (!$line =~ /^([a-f0-9]+)/) {
-				die "Unexpected output from git rev-list: $line\n";
+				die "Unexpected output from git rev-list: ${line}\n";
 			}
 		}
 		while ($parsed_sha1 ne $HEAD_sha1) {
@@ -1201,7 +1201,7 @@ sub mw_push_revision {
 		# No remote mediawiki revision. Export the whole
 		# history (linearized with --first-parent)
 		print STDERR "Warning: no common ancestor, pushing complete history\n";
-		my $history = run_git("rev-list --first-parent --children $local");
+		my $history = run_git("rev-list --first-parent --children ${local}");
 		my @history = split(/\n/, $history);
 		@history = @history[1..$#history];
 		foreach my $line (reverse @history) {
@@ -1213,12 +1213,12 @@ sub mw_push_revision {
 	foreach my $commit_info_split (@commit_pairs) {
 		my $sha1_child = @{$commit_info_split}[0];
 		my $sha1_commit = @{$commit_info_split}[1];
-		my $diff_infos = run_git("diff-tree -r --raw -z $sha1_child $sha1_commit");
+		my $diff_infos = run_git("diff-tree -r --raw -z ${sha1_child} ${sha1_commit}");
 		# TODO: we could detect rename, and encode them with a #redirect on the wiki.
 		# TODO: for now, it's just a delete+add
 		my @diff_info_list = split(/\0/, $diff_infos);
 		# Keep the subject line of the commit message as mediawiki comment for the revision
-		my $commit_msg = run_git("log --no-walk --format=\"%s\" $sha1_commit");
+		my $commit_msg = run_git(qq(log --no-walk --format="%s" ${sha1_commit}));
 		chomp($commit_msg);
 		# Push every blob
 		while (@diff_info_list) {
@@ -1230,7 +1230,7 @@ sub mw_push_revision {
 			my $info = shift(@diff_info_list);
 			my $file = shift(@diff_info_list);
 			($mw_revision, $status) = mw_push_file($info, $file, $commit_msg, $mw_revision);
-			if ($status eq "non-fast-forward") {
+			if ($status eq 'non-fast-forward') {
 				# we may already have sent part of the
 				# commit to MediaWiki, but it's too
 				# late to cancel it. Stop the push in
@@ -1238,17 +1238,17 @@ sub mw_push_revision {
 				# accurate error message.
 				return error_non_fast_forward($remote);
 			}
-			if ($status ne "ok") {
+			if ($status ne 'ok') {
 				die("Unknown error from mw_push_file()\n");
 			}
 		}
 		unless ($dumb_push) {
-			run_git("notes --ref=$remotename/mediawiki add -f -m \"mediawiki_revision: $mw_revision\" $sha1_commit");
-			run_git("update-ref -m \"Git-MediaWiki push\" refs/mediawiki/$remotename/master $sha1_commit $sha1_child");
+			run_git(qq(notes --ref=${remotename}/mediawiki add -f -m "mediawiki_revision: ${mw_revision}" ${sha1_commit}));
+			run_git(qq(update-ref -m "Git-MediaWiki push" refs/mediawiki/${remotename}/master ${sha1_commit} ${sha1_child}));
 		}
 	}
 
-	print STDOUT "ok $remote\n";
+	print STDOUT "ok ${remote}\n";
 	return 1;
 }
 
@@ -1284,8 +1284,7 @@ sub get_mw_namespace_id {
 		# Look at configuration file, if the record for that namespace is
 		# already cached. Namespaces are stored in form:
 		# "Name_of_namespace:Id_namespace", ex.: "File:6".
-		my @temp = split(/\n/, run_git("config --get-all remote."
-						. $remotename .".namespaceCache"));
+		my @temp = split(/\n/, run_git("config --get-all remote.${remotename}.namespaceCache"));
 		chomp(@temp);
 		foreach my $ns (@temp) {
 			my ($n, $id) = split(/:/, $ns);
@@ -1299,7 +1298,7 @@ sub get_mw_namespace_id {
 	}
 
 	if (!exists $namespace_id{$name}) {
-		print STDERR "Namespace $name not found in cache, querying the wiki ...\n";
+		print STDERR "Namespace ${name} not found in cache, querying the wiki ...\n";
 		# NS not found => get namespace id from MW and store it in
 	        # configuration file.
 	        my $query = {
@@ -1324,7 +1323,7 @@ sub get_mw_namespace_id {
 	my $id;
 
 	unless (defined $ns) {
-		print STDERR "No such namespace $name on MediaWiki.\n";
+		print STDERR "No such namespace ${name} on MediaWiki.\n";
 		$ns = {is_namespace => 0};
 		$namespace_id{$name} = $ns;
 	}
@@ -1338,8 +1337,7 @@ sub get_mw_namespace_id {
 
 	# Store explicitely requested namespaces on disk
 	if (!exists $cached_mw_namespace_id{$name}) {
-		run_git("config --add remote.". $remotename
-			.".namespaceCache \"". $name .":". $store_id ."\"");
+		run_git(qq(config --add remote.${remotename}.namespaceCache "${name}:${store_id}"));
 		$cached_mw_namespace_id{$name} = 1;
 	}
 	return $id;
-- 
1.7.9.5

Re: [PATCH v2 16/22] git-remote-mediawiki: Modify strings for a better coding-style

[Eric Sunshine]

On Fri, Jun 7, 2013 at 5:42 PM, Célestin Matte
<celestin.matte@ensimag.fr> wrote:
> - strings which don't need interpolation are single-quoted for more clarity and
> slight gain of performance
> - interpolation is preferred over concatenation in many cases, for more clarity
> - variables are always used with the ${} operator inside strings
> - strings including double-quotes are written with qq() so that the quotes do
> not have to be escaped

Distinct changes could (IMHO) be split into separate patches for easier review.

> Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
> Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
>
> Conflicts:
>
>         contrib/mw-to-git/git-remote-mediawiki.perl

Conflict information is not interesting to reviewers or even in final
commit messages since (hopefully) you will have resolved conflicts
before committing. They can be stripped.

More below.

> ---
>  contrib/mw-to-git/git-remote-mediawiki.perl |  244 +++++++++++++--------------
>  1 file changed, 121 insertions(+), 123 deletions(-)
>
> diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
> index f37488b..2d4ea1d 100755
> --- a/contrib/mw-to-git/git-remote-mediawiki.perl
> +++ b/contrib/mw-to-git/git-remote-mediawiki.perl
> @@ -199,10 +199,10 @@ sub mw_connect_maybe {
>                                lgdomain => $wiki_domain};
>                 if ($mediawiki->login($request)) {
>                         Git::credential \%credential, 'approve';
> -                       print STDERR "Logged in mediawiki user \"$credential{username}\".\n";
> +                       print STDERR qq(Logged in mediawiki user "$credential{username}".\n);
>                 } else {
> -                       print STDERR "Failed to log in mediawiki user \"$credential{username}\" on $url\n";
> -                       print STDERR "  (error " .
> +                       print {*STDERR} qq(Failed to log in mediawiki user "$credential{username}" on ${url}\n);
> +                       print {*STDERR} '  (error ' .

This change from patch 17/22 (adding braces around file handles)
sneaked in early with this patch (16/22).

>                                 $mediawiki->{error}->{code} . ': ' .
>                                 $mediawiki->{error}->{details} . ")\n";
>                         Git::credential \%credential, 'reject';
> @@ -473,27 +473,27 @@ sub download_mw_mediafile {
>         if ($response->code == 200) {
>                 return $response->decoded_content;
>         } else {
> -               print STDERR "Error downloading mediafile from :\n";
> -               print STDERR "URL: $download_url\n";
> -               print STDERR "Server response: " . $response->code . " " . $response->message . "\n";
> +               print {*STDERR} "Error downloading mediafile from :\n";
> +               print {*STDERR} "URL: ${download_url}\n";
> +               print {*STDERR} 'Server response: ' . $response->code . q{ } . $response->message . "\n";

Ditto: Sneak in from 17/22.

>                 exit 1;
>         }
>  }
>
>  sub get_last_local_revision {
>         # Get note regarding last mediawiki revision
> -       my $note = run_git("notes --ref=$remotename/mediawiki show refs/mediawiki/$remotename/master 2>/dev/null");
> +       my $note = run_git("notes --ref=${remotename}/mediawiki show refs/mediawiki/${remotename}/master 2>/dev/null");
>         my @note_info = split(/ /, $note);
>
>         my $lastrevision_number;
> -       if (!(defined($note_info[0]) && $note_info[0] eq "mediawiki_revision:")) {
> -               print STDERR "No previous mediawiki revision found";
> +       if (!(defined($note_info[0]) && $note_info[0] eq 'mediawiki_revision:')) {
> +               print STDERR 'No previous mediawiki revision found';
>                 $lastrevision_number = 0;
>         } else {
>                 # Notes are formatted : mediawiki_revision: #number
>                 $lastrevision_number = $note_info[1];
>                 chomp($lastrevision_number);
> -               print STDERR "Last local mediawiki revision found is $lastrevision_number";
> +               print STDERR "Last local mediawiki revision found is ${lastrevision_number}";
>         }
>         return $lastrevision_number;
>  }
> @@ -690,8 +690,7 @@ sub fetch_mw_revisions {
>         my $n = 1;
>         foreach my $page (@pages) {
>                 my $id = $page->{pageid};
> -
> -               print STDERR "page $n/", scalar(@pages), ": ". $page->{title} ."\n";
> +               print {*STDERR} "page ${n}/", scalar(@pages), ': ', $page->{title}, "\n";

Again 17/22.

>                 $n++;
>                 my @page_revs = fetch_mw_revisions_for_page($page, $id, $fetch_from);
>                 @revisions = (@page_revs, @revisions);
> @@ -705,7 +704,7 @@ sub fe_escape_path {
>      $path =~ s/\\/\\\\/g;
>      $path =~ s/"/\\"/g;
>      $path =~ s/\n/\\n/g;
> -    return '"' . $path . '"';
> +    return qq("${path}");
>  }
>
>  sub import_file_revision {

Re: [PATCH v2 16/22] git-remote-mediawiki: Modify strings for a better coding-style

[Célestin Matte]

Le 08/06/2013 02:39, Eric Sunshine a écrit :
> On Fri, Jun 7, 2013 at 5:42 PM, Célestin Matte
> <celestin.matte@ensimag.fr> wrote:
>> - strings which don't need interpolation are single-quoted for more clarity and
>> slight gain of performance
>> - interpolation is preferred over concatenation in many cases, for more clarity
>> - variables are always used with the ${} operator inside strings
>> - strings including double-quotes are written with qq() so that the quotes do
>> not have to be escaped
> 
> Distinct changes could (IMHO) be split into separate patches for easier review.

This commit is a real pain to cut into 3 distinctive ones. Is this
really necessary?
I will do it if it is, of course.


-- 
Célestin Matte

Re: [PATCH v2 16/22] git-remote-mediawiki: Modify strings for a better coding-style

[Eric Sunshine]

On Sat, Jun 8, 2013 at 4:32 PM, Célestin Matte
<celestin.matte@ensimag.fr> wrote:
> Le 08/06/2013 02:39, Eric Sunshine a écrit :
>> On Fri, Jun 7, 2013 at 5:42 PM, Célestin Matte
>> <celestin.matte@ensimag.fr> wrote:
>>> - strings which don't need interpolation are single-quoted for more clarity and
>>> slight gain of performance
>>> - interpolation is preferred over concatenation in many cases, for more clarity
>>> - variables are always used with the ${} operator inside strings
>>> - strings including double-quotes are written with qq() so that the quotes do
>>> not have to be escaped
>>
>> Distinct changes could (IMHO) be split into separate patches for easier review.
>
> This commit is a real pain to cut into 3 distinctive ones. Is this
> really necessary?
> I will do it if it is, of course.

[I think you meant that it would be split into 4 patches.]

The final decision is up to the submitter (you) and the people signing
off on and accepting the patch (Matthieu and Junio).

Speaking merely as a person reviewing the patch series, I can say that
mixing conceptually unrelated changes into a single patch makes review
more onerous since it requires repeatedly switching mental gears
(often from line to line or even within a single line). Patches
involving simple "mechanical" changes typically are easy to review,
even when the patches are lengthy. In this case, however, that length
coupled with the mental gear switching, makes the review process more
burdensome that it need be.

Even if you decide ultimately not to bother splitting the patch,
ease-of-review and one-conceptual-change-per-patch are useful notions
to keep in mind for future submissions.

[PATCH v2 17/22] git-remote-mediawiki: Brace file handles for print for more clarity

[Célestin Matte]

This follows the following rule:
InputOutput::RequireBracedFileHandleWithPrint (Severity: 1)
    The `print' and `printf' functions have a unique syntax that supports an
    optional file handle argument. Conway suggests wrapping this argument in
    braces to make it visually stand out from the other arguments. When you
    put braces around any of the special package-level file handles like
    `STDOUT', `STDERR', and `DATA', you must the `'*'' sigil or else it
    won't compile under `use strict 'subs''.

      print $FH   "Mary had a little lamb\n";  #not ok
      print {$FH} "Mary had a little lamb\n";  #ok

      print   STDERR   $foo, $bar, $baz;  #not ok
      print  {STDERR}  $foo, $bar, $baz;  #won't compile under 'strict'
      print {*STDERR}  $foo, $bar, $baz;  #perfect!

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>

Conflicts:

	contrib/mw-to-git/git-remote-mediawiki.perl
---
 contrib/mw-to-git/git-remote-mediawiki.perl |  184 +++++++++++++--------------
 1 file changed, 92 insertions(+), 92 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 2d4ea1d..1024de1 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -172,8 +172,8 @@ sub parse_commands {
 	} elsif ($cmd[0] eq 'push') {
 		mw_push($cmd[1]);
 	} else {
-		print STDERR "Unknown command. Aborting...\n";
-		return 1;
+		print {*STDERR} "Unknown command. Aborting...\n";
+		last;
 	}
 	return 0;
 }
@@ -199,7 +199,7 @@ sub mw_connect_maybe {
 			       lgdomain => $wiki_domain};
 		if ($mediawiki->login($request)) {
 			Git::credential \%credential, 'approve';
-			print STDERR qq(Logged in mediawiki user "$credential{username}".\n);
+			print {*STDERR} qq(Logged in mediawiki user "$credential{username}".\n);
 		} else {
 			print {*STDERR} qq(Failed to log in mediawiki user "$credential{username}" on ${url}\n);
 			print {*STDERR} '  (error ' .
@@ -267,9 +267,9 @@ sub get_mw_all_pages {
 		aplimit => 'max'
 	});
 	if (!defined($mw_pages)) {
-		print STDERR "fatal: could not get the list of wiki pages.\n";
-		print STDERR "fatal: '${url}' does not appear to be a mediawiki\n";
-		print STDERR "fatal: make sure '${url}/api.php' is a valid page.\n";
+		print {*STDERR} "fatal: could not get the list of wiki pages.\n";
+		print {*STDERR} "fatal: '${url}' does not appear to be a mediawiki\n";
+		print {*STDERR} "fatal: make sure '${url}/api.php' is a valid page.\n";
 		exit 1;
 	}
 	foreach my $page (@{$mw_pages}) {
@@ -294,14 +294,14 @@ sub get_mw_first_pages {
 		titles => $titles,
 	});
 	if (!defined($mw_pages)) {
-		print STDERR "fatal: could not query the list of wiki pages.\n";
-		print STDERR "fatal: '${url}' does not appear to be a mediawiki\n";
-		print STDERR "fatal: make sure '${url}/api.php' is a valid page.\n";
+		print {*STDERR} "fatal: could not query the list of wiki pages.\n";
+		print {*STDERR} "fatal: '${url}' does not appear to be a mediawiki\n";
+		print {*STDERR} "fatal: make sure '${url}/api.php' is a valid page.\n";
 		exit 1;
 	}
 	while (my ($id, $page) = each(%{$mw_pages->{query}->{pages}})) {
 		if ($id < 0) {
-			print STDERR "Warning: page $page->{title} not found on wiki\n";
+			print {*STDERR} "Warning: page $page->{title} not found on wiki\n";
 		} else {
 			$pages->{$page->{title}} = $page;
 		}
@@ -313,7 +313,7 @@ sub get_mw_first_pages {
 sub get_mw_pages {
 	mw_connect_maybe();
 
-	print STDERR "Listing pages on remote wiki...\n";
+	print {*STDERR} "Listing pages on remote wiki...\n";
 
 	my %pages; # hash on page titles to avoid duplicates
 	my $user_defined;
@@ -331,14 +331,14 @@ sub get_mw_pages {
 		get_mw_all_pages(\%pages);
 	}
 	if ($import_media) {
-		print STDERR "Getting media files for selected pages...\n";
+		print {*STDERR} "Getting media files for selected pages...\n";
 		if ($user_defined) {
 			get_linked_mediafiles(\%pages);
 		} else {
 			get_all_mediafiles(\%pages);
 		}
 	}
-	print STDERR (scalar keys %pages) . " pages found.\n";
+	print {*STDERR} (scalar keys %pages) . " pages found.\n";
 	return %pages;
 }
 
@@ -371,9 +371,9 @@ sub get_all_mediafiles {
 		aplimit => 'max'
 	});
 	if (!defined($mw_pages)) {
-		print STDERR "fatal: could not get the list of pages for media files.\n";
-		print STDERR "fatal: '$url' does not appear to be a mediawiki\n";
-		print STDERR "fatal: make sure '$url/api.php' is a valid page.\n";
+		print {*STDERR} "fatal: could not get the list of pages for media files.\n";
+		print {*STDERR} "fatal: '$url' does not appear to be a mediawiki\n";
+		print {*STDERR} "fatal: make sure '$url/api.php' is a valid page.\n";
 		exit 1;
 	}
 	foreach my $page (@{$mw_pages}) {
@@ -460,7 +460,7 @@ sub get_mw_mediafile_for_page_revision {
 		$mediafile{timestamp} = $fileinfo->{timestamp};
 		# Mediawiki::API's download function doesn't support https URLs
 		# and can't download old versions of files.
-		print STDERR "\tDownloading file $mediafile{title}, version $mediafile{timestamp}\n";
+		print {*STDERR} "\tDownloading file $mediafile{title}, version $mediafile{timestamp}\n";
 		$mediafile{content} = download_mw_mediafile($fileinfo->{url});
 	}
 	return %mediafile;
@@ -487,13 +487,13 @@ sub get_last_local_revision {
 
 	my $lastrevision_number;
 	if (!(defined($note_info[0]) && $note_info[0] eq 'mediawiki_revision:')) {
-		print STDERR 'No previous mediawiki revision found';
+		print {*STDERR} 'No previous mediawiki revision found';
 		$lastrevision_number = 0;
 	} else {
 		# Notes are formatted : mediawiki_revision: #number
 		$lastrevision_number = $note_info[1];
 		chomp($lastrevision_number);
-		print STDERR "Last local mediawiki revision found is ${lastrevision_number}";
+		print {*STDERR} "Last local mediawiki revision found is ${lastrevision_number}";
 	}
 	return $lastrevision_number;
 }
@@ -526,7 +526,7 @@ sub get_last_remote_revision {
 
 	my $max_rev_num = 0;
 
-	print STDERR "Getting last revision id on tracked pages...\n";
+	print {*STDERR} "Getting last revision id on tracked pages...\n";
 
 	foreach my $page (@pages) {
 		my $id = $page->{pageid};
@@ -547,7 +547,7 @@ sub get_last_remote_revision {
 		$max_rev_num = ($lastrev->{revid} > $max_rev_num ? $lastrev->{revid} : $max_rev_num);
 	}
 
-	print STDERR "Last remote revision found is $max_rev_num.\n";
+	print {*STDERR} "Last remote revision found is $max_rev_num.\n";
 	return $max_rev_num;
 }
 
@@ -600,7 +600,7 @@ sub mediawiki_smudge_filename {
 
 sub literal_data {
 	my ($content) = @_;
-	print STDOUT 'data ', bytes::length($content), "\n", $content;
+	print {*STDOUT} 'data ', bytes::length($content), "\n", $content;
 	return;
 }
 
@@ -619,26 +619,26 @@ sub mw_capabilities {
 	# Revisions are imported to the private namespace
 	# refs/mediawiki/$remotename/ by the helper and fetched into
 	# refs/remotes/$remotename later by fetch.
-	print STDOUT "refspec refs/heads/*:refs/mediawiki/${remotename}/*\n";
-	print STDOUT "import\n";
-	print STDOUT "list\n";
-	print STDOUT "push\n";
-	print STDOUT "\n";
+	print {*STDOUT} "refspec refs/heads/*:refs/mediawiki/${remotename}/*\n";
+	print {*STDOUT} "import\n";
+	print {*STDOUT} "list\n";
+	print {*STDOUT} "push\n";
+	print {*STDOUT} "\n";
 	return;
 }
 
 sub mw_list {
 	# MediaWiki do not have branches, we consider one branch arbitrarily
 	# called master, and HEAD pointing to it.
-	print STDOUT "? refs/heads/master\n";
-	print STDOUT "\@refs/heads/master HEAD\n";
-	print STDOUT "\n";
+	print {*STDOUT} "? refs/heads/master\n";
+	print {*STDOUT} "\@refs/heads/master HEAD\n";
+	print {*STDOUT} "\n";
 	return;
 }
 
 sub mw_option {
-	print STDERR "remote-helper command 'option $_[0]' not yet implemented\n";
-	print STDOUT "unsupported\n";
+	print {*STDERR} "remote-helper command 'option $_[0]' not yet implemented\n";
+	print {*STDOUT} "unsupported\n";
 	return;
 }
 
@@ -674,11 +674,11 @@ sub fetch_mw_revisions_for_page {
 		$query->{rvstartid} = $result->{'query-continue'}->{revisions}->{rvstartid};
 	}
 	if ($shallow_import && @page_revs) {
-		print STDERR "  Found 1 revision (shallow import).\n";
+		print {*STDERR} "  Found 1 revision (shallow import).\n";
 		@page_revs = sort {$b->{revid} <=> $a->{revid}} (@page_revs);
 		return $page_revs[0];
 	}
-	print STDERR "  Found ${revnum} revision(s).\n";
+	print {*STDERR} "  Found ${revnum} revision(s).\n";
 	return @page_revs;
 }
 
@@ -724,42 +724,42 @@ sub import_file_revision {
 	my $author = $commit{author};
 	my $date = $commit{date};
 
-	print STDOUT "commit refs/mediawiki/${remotename}/master\n";
-	print STDOUT "mark :${n}\n";
-	print STDOUT "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
+	print {*STDOUT} "commit refs/mediawiki/${remotename}/master\n";
+	print {*STDOUT} "mark :${n}\n";
+	print {*STDOUT} "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
 	literal_data($comment);
 
 	# If it's not a clone, we need to know where to start from
 	if (!$full_import && $n == 1) {
-		print STDOUT "from refs/mediawiki/${remotename}/master^0\n";
+		print {*STDOUT} "from refs/mediawiki/${remotename}/master^0\n";
 	}
 	if ($content ne $DELETED_CONTENT) {
 		print {*STDOUT} 'M 644 inline ' .
 		    fe_escape_path("${title}.mw") . "\n";
 		literal_data($content);
 		if (%mediafile) {
-			print STDOUT 'M 644 inline '
+			print {*STDOUT} 'M 644 inline '
 			    . fe_escape_path($mediafile{title}) . "\n";
 			literal_data_raw($mediafile{content});
 		}
-		print STDOUT "\n\n";
+		print {*STDOUT} "\n\n";
 	} else {
-		print STDOUT 'D ' . fe_escape_path("${title}.mw") . "\n";
+		print {*STDOUT} 'D ' . fe_escape_path("${title}.mw") . "\n";
 	}
 
 	# mediawiki revision number in the git note
 	if ($full_import && $n == 1) {
-		print STDOUT "reset refs/notes/${remotename}/mediawiki\n";
+		print {*STDOUT} "reset refs/notes/${remotename}/mediawiki\n";
 	}
-	print STDOUT "commit refs/notes/${remotename}/mediawiki\n";
-	print STDOUT "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
+	print {*STDOUT} "commit refs/notes/${remotename}/mediawiki\n";
+	print {*STDOUT} "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
 	literal_data('Note added by git-mediawiki during import');
 	if (!$full_import && $n == 1) {
-		print STDOUT "from refs/notes/${remotename}/mediawiki^0\n";
+		print {*STDOUT} "from refs/notes/${remotename}/mediawiki^0\n";
 	}
-	print STDOUT "N inline :${n}\n";
+	print {*STDOUT} "N inline :${n}\n";
 	literal_data("mediawiki_revision: $commit{mw_revision}");
-	print STDOUT "\n\n";
+	print {*STDOUT} "\n\n";
 	return;
 }
 
@@ -790,7 +790,7 @@ sub mw_import {
 	foreach my $ref (@refs) {
 		mw_import_ref($ref);
 	}
-	print STDOUT "done\n";
+	print {*STDOUT} "done\n";
 	return;
 }
 
@@ -807,30 +807,30 @@ sub mw_import_ref {
 
 	mw_connect_maybe();
 
-	print STDERR "Searching revisions...\n";
+	print {*STDERR} "Searching revisions...\n";
 	my $last_local = get_last_local_revision();
 	my $fetch_from = $last_local + 1;
 	if ($fetch_from == 1) {
-		print STDERR ", fetching from beginning.\n";
+		print {*STDERR} ", fetching from beginning.\n";
 	} else {
-		print STDERR ", fetching from here.\n";
+		print {*STDERR} ", fetching from here.\n";
 	}
 
 	my $n = 0;
 	if ($fetch_strategy eq 'by_rev') {
-		print STDERR "Fetching & writing export data by revs...\n";
+		print {*STDERR} "Fetching & writing export data by revs...\n";
 		$n = mw_import_ref_by_revs($fetch_from);
 	} elsif ($fetch_strategy eq 'by_page') {
-		print STDERR "Fetching & writing export data by pages...\n";
+		print {*STDERR} "Fetching & writing export data by pages...\n";
 		$n = mw_import_ref_by_pages($fetch_from);
 	} else {
-		print STDERR qq(fatal: invalid fetch strategy "${fetch_strategy}".\n);
-		print STDERR "Check your configuration variables remote.${remotename}.fetchStrategy and mediawiki.fetchStrategy\n";
+		print {*STDERR} qq(fatal: invalid fetch strategy "${fetch_strategy}".\n);
+		print {*STDERR} "Check your configuration variables remote.${remotename}.fetchStrategy and mediawiki.fetchStrategy\n";
 		exit 1;
 	}
 
 	if ($fetch_from == 1 && $n == 0) {
-		print STDERR "You appear to have cloned an empty MediaWiki.\n";
+		print {*STDERR} "You appear to have cloned an empty MediaWiki.\n";
 		# Something has to be done remote-helper side. If nothing is done, an error is
 		# thrown saying that HEAD is referring to unknown object 0000000000000000000
 		# and the clone fails.
@@ -909,7 +909,7 @@ sub mw_import_revids {
 		my $page_title = $result_page->{title};
 
 		if (!exists($pages->{$page_title})) {
-			print STDERR "${n}/", scalar(@$revision_ids),
+			print {*STDERR} "${n}/", scalar(@$revision_ids),
 				": Skipping revision #$rev->{revid} of ${page_title}\n";
 			next;
 		}
@@ -942,7 +942,7 @@ sub mw_import_revids {
 		# If this is a revision of the media page for new version
 		# of a file do one common commit for both file and media page.
 		# Else do commit only for that page.
-		print STDERR "${n}/", scalar(@$revision_ids), ": Revision #$rev->{revid} of $commit{title}\n";
+		print {*STDERR} "${n}/", scalar(@$revision_ids), ": Revision #$rev->{revid} of $commit{title}\n";
 		import_file_revision(\%commit, ($fetch_from == 1), $n_actual, \%mediafile);
 	}
 
@@ -956,11 +956,11 @@ sub error_non_fast_forward {
 		# Native git-push would show this after the summary.
 		# We can't ask it to display it cleanly, so print it
 		# ourselves before.
-		print STDERR "To prevent you from losing history, non-fast-forward updates were rejected\n";
-		print STDERR "Merge the remote changes (e.g. 'git pull') before pushing again. See the\n";
-		print STDERR "'Note about fast-forwards' section of 'git push --help' for details.\n";
+		print {*STDERR} "To prevent you from losing history, non-fast-forward updates were rejected\n";
+		print {*STDERR} "Merge the remote changes (e.g. 'git pull') before pushing again. See the\n";
+		print {*STDERR} "'Note about fast-forwards' section of 'git push --help' for details.\n";
 	}
-	print STDOUT qq(error $_[0] "non-fast-forward"\n);
+	print {*STDOUT} qq(error $_[0] "non-fast-forward"\n);
 	return 0;
 }
 
@@ -974,8 +974,8 @@ sub mw_upload_file {
 	my $path = "File:${complete_file_name}";
 	my %hashFiles = get_allowed_file_extensions();
 	if (!exists($hashFiles{$extension})) {
-		print STDERR "${complete_file_name} is not a permitted file on this wiki.\n";
-		print STDERR "Check the configuration of file uploads in your mediawiki.\n";
+		print {*STDERR} "${complete_file_name} is not a permitted file on this wiki.\n";
+		print {*STDERR} "Check the configuration of file uploads in your mediawiki.\n";
 		return $newrevid;
 	}
 	# Deleting and uploading a file requires a priviledged user
@@ -987,9 +987,9 @@ sub mw_upload_file {
 			reason => $summary
 		};
 		if (!$mediawiki->edit($query)) {
-			print STDERR "Failed to delete file on remote wiki\n";
-			print STDERR "Check your permissions on the remote site. Error code:\n";
-			print STDERR $mediawiki->{error}->{code} . ':' . $mediawiki->{error}->{details};
+			print {*STDERR} "Failed to delete file on remote wiki\n";
+			print {*STDERR} "Check your permissions on the remote site. Error code:\n";
+			print {*STDERR} $mediawiki->{error}->{code} . ':' . $mediawiki->{error}->{details};
 			exit 1;
 		}
 	} else {
@@ -1013,9 +1013,9 @@ sub mw_upload_file {
 				 . $mediawiki->{error}->{details} . "\n";
 			my $last_file_page = $mediawiki->get_page({title => $path});
 			$newrevid = $last_file_page->{revid};
-			print STDERR "Pushed file: ${new_sha1} - ${complete_file_name}.\n";
+			print {*STDERR} "Pushed file: ${new_sha1} - ${complete_file_name}.\n";
 		} else {
-			print STDERR "Empty file ${complete_file_name} not pushed.\n";
+			print {*STDERR} "Empty file ${complete_file_name} not pushed.\n";
 		}
 	}
 	return $newrevid;
@@ -1053,7 +1053,7 @@ sub mw_push_file {
 	if ($extension eq 'mw') {
 		my $ns = get_mw_namespace_id_for_page($complete_file_name);
 		if ($ns && $ns == get_mw_namespace_id('File') && (!$export_media)) {
-			print STDERR "Ignoring media file related page: ${complete_file_name}\n";
+			print {*STDERR} "Ignoring media file related page: ${complete_file_name}\n";
 			return ($oldrevid, 'ok');
 		}
 		my $file_content;
@@ -1081,7 +1081,7 @@ sub mw_push_file {
 		if (!$result) {
 			if ($mediawiki->{error}->{code} == 3) {
 				# edit conflicts, considered as non-fast-forward
-				print STDERR 'Warning: Error ' .
+				print {*STDERR} 'Warning: Error ' .
 				    $mediawiki->{error}->{code} .
 				    ' from mediwiki: ' . $mediawiki->{error}->{details} .
 				    ".\n";
@@ -1094,13 +1094,13 @@ sub mw_push_file {
 			}
 		}
 		$newrevid = $result->{edit}->{newrevid};
-		print STDERR "Pushed file: ${new_sha1} - ${title}\n";
+		print {*STDERR} "Pushed file: ${new_sha1} - ${title}\n";
 	} elsif ($export_media) {
 		$newrevid = mw_upload_file($complete_file_name, $new_sha1,
 					   $extension, $page_deleted,
 					   $summary);
 	} else {
-		print STDERR "Ignoring media file ${title}\n";
+		print {*STDERR} "Ignoring media file ${title}\n";
 	}
 	$newrevid = ($newrevid or $oldrevid);
 	return ($newrevid, 'ok');
@@ -1114,16 +1114,16 @@ sub mw_push {
 		my ($force, $local, $remote) = $refspec =~ /^(\+)?([^:]*):([^:]*)$/
 		    or die("Invalid refspec for push. Expected <src>:<dst> or +<src>:<dst>\n");
 		if ($force) {
-			print STDERR "Warning: forced push not allowed on a MediaWiki.\n";
+			print {*STDERR} "Warning: forced push not allowed on a MediaWiki.\n";
 		}
 		if ($local eq "") {
-			print STDERR "Cannot delete remote branch on a MediaWiki\n";
-			print STDOUT "error ${remote} cannot delete\n";
+			print {*STDERR} "Cannot delete remote branch on a MediaWiki\n";
+			print {*STDOUT} "error ${remote} cannot delete\n";
 			next;
 		}
 		if ($remote ne 'refs/heads/master') {
-			print STDERR "Only push to the branch 'master' is supported on a MediaWiki\n";
-			print STDOUT "error ${remote} only master allowed\n";
+			print {*STDERR} "Only push to the branch 'master' is supported on a MediaWiki\n";
+			print {*STDOUT} "error ${remote} only master allowed\n";
 			next;
 		}
 		if (mw_push_revision($local, $remote)) {
@@ -1132,15 +1132,15 @@ sub mw_push {
 	}
 
 	# Notify Git that the push is done
-	print STDOUT "\n";
+	print {*STDOUT} "\n";
 
 	if ($pushed && $dumb_push) {
-		print STDERR "Just pushed some revisions to MediaWiki.\n";
-		print STDERR "The pushed revisions now have to be re-imported, and your current branch\n";
-		print STDERR "needs to be updated with these re-imported commits. You can do this with\n";
-		print STDERR "\n";
-		print STDERR "  git pull --rebase\n";
-		print STDERR "\n";
+		print {*STDERR} "Just pushed some revisions to MediaWiki.\n";
+		print {*STDERR} "The pushed revisions now have to be re-imported, and your current branch\n";
+		print {*STDERR} "needs to be updated with these re-imported commits. You can do this with\n";
+		print {*STDERR} "\n";
+		print {*STDERR} "  git pull --rebase\n";
+		print {*STDERR} "\n";
 	}
 	return;
 }
@@ -1149,7 +1149,7 @@ sub mw_push_revision {
 	my $local = shift;
 	my $remote = shift; # actually, this has to be "refs/heads/master" at this point.
 	my $last_local_revid = get_last_local_revision();
-	print STDERR ".\n"; # Finish sentence started by get_last_local_revision()
+	print {*STDERR} ".\n"; # Finish sentence started by get_last_local_revision()
 	my $last_remote_revid = get_last_remote_revision();
 	my $mw_revision = $last_remote_revid;
 
@@ -1176,7 +1176,7 @@ sub mw_push_revision {
 	if ($last_local_revid > 0) {
 		my $parsed_sha1 = $remoteorigin_sha1;
 		# Find a path from last MediaWiki commit to pushed commit
-		print STDERR "Computing path from local to remote ...\n";
+		print {*STDERR} "Computing path from local to remote ...\n";
 		my @local_ancestry = split(/\n/, run_git("rev-list --boundary --parents ${local} ^${parsed_sha1}"));
 		my %local_ancestry;
 		foreach my $line (@local_ancestry) {
@@ -1191,7 +1191,7 @@ sub mw_push_revision {
 		while ($parsed_sha1 ne $HEAD_sha1) {
 			my $child = $local_ancestry{$parsed_sha1};
 			if (!$child) {
-				printf STDERR "Cannot find a path in history from remote commit to last commit\n";
+				print {*STDERR} "Cannot find a path in history from remote commit to last commit\n";
 				return error_non_fast_forward($remote);
 			}
 			push(@commit_pairs, [$parsed_sha1, $child]);
@@ -1200,7 +1200,7 @@ sub mw_push_revision {
 	} else {
 		# No remote mediawiki revision. Export the whole
 		# history (linearized with --first-parent)
-		print STDERR "Warning: no common ancestor, pushing complete history\n";
+		print {*STDERR} "Warning: no common ancestor, pushing complete history\n";
 		my $history = run_git("rev-list --first-parent --children ${local}");
 		my @history = split(/\n/, $history);
 		@history = @history[1..$#history];
@@ -1248,7 +1248,7 @@ sub mw_push_revision {
 		}
 	}
 
-	print STDOUT "ok ${remote}\n";
+	print {*STDOUT} "ok ${remote}\n";
 	return 1;
 }
 
@@ -1298,7 +1298,7 @@ sub get_mw_namespace_id {
 	}
 
 	if (!exists $namespace_id{$name}) {
-		print STDERR "Namespace ${name} not found in cache, querying the wiki ...\n";
+		print {*STDERR} "Namespace ${name} not found in cache, querying the wiki ...\n";
 		# NS not found => get namespace id from MW and store it in
 	        # configuration file.
 	        my $query = {
@@ -1323,7 +1323,7 @@ sub get_mw_namespace_id {
 	my $id;
 
 	unless (defined $ns) {
-		print STDERR "No such namespace ${name} on MediaWiki.\n";
+		print {*STDERR} "No such namespace ${name} on MediaWiki.\n";
 		$ns = {is_namespace => 0};
 		$namespace_id{$name} = $ns;
 	}
-- 
1.7.9.5

Re: [PATCH v2 17/22] git-remote-mediawiki: Brace file handles for print for more clarity

[Eric Sunshine]

On Fri, Jun 7, 2013 at 5:42 PM, Célestin Matte
<celestin.matte@ensimag.fr> wrote:
> This follows the following rule:
> InputOutput::RequireBracedFileHandleWithPrint (Severity: 1)
>     The `print' and `printf' functions have a unique syntax that supports an
>     optional file handle argument. Conway suggests wrapping this argument in
>     braces to make it visually stand out from the other arguments. When you
>     put braces around any of the special package-level file handles like
>     `STDOUT', `STDERR', and `DATA', you must the `'*'' sigil or else it
>     won't compile under `use strict 'subs''.
>
>       print $FH   "Mary had a little lamb\n";  #not ok
>       print {$FH} "Mary had a little lamb\n";  #ok
>
>       print   STDERR   $foo, $bar, $baz;  #not ok
>       print  {STDERR}  $foo, $bar, $baz;  #won't compile under 'strict'
>       print {*STDERR}  $foo, $bar, $baz;  #perfect!
>
> Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
> Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
>
> Conflicts:
>
>         contrib/mw-to-git/git-remote-mediawiki.perl

Uninteresting conflict information can be dropped.

[PATCH v2 18/22] git-remote-mediawiki: Replace "unless" statements with negated "if" statements

[Célestin Matte]

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 1024de1..123730f 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -87,11 +87,11 @@ $shallow_import = ($shallow_import eq 'true');
 # - by_rev: perform one query per new revision on the remote wiki
 # - by_page: query each tracked page for new revision
 my $fetch_strategy = run_git("config --get remote.${remotename}.fetchStrategy");
-unless ($fetch_strategy) {
+if (!$fetch_strategy) {
 	$fetch_strategy = run_git('config --get mediawiki.fetchStrategy');
 }
 chomp($fetch_strategy);
-unless ($fetch_strategy) {
+if (!$fetch_strategy) {
 	$fetch_strategy = 'by_page';
 }
 
@@ -113,7 +113,7 @@ my %basetimestamps;
 # deterministic, this means everybody gets the same sha1 for each
 # MediaWiki revision.
 my $dumb_push = run_git("config --get --bool remote.${remotename}.dumbPush");
-unless ($dumb_push) {
+if (!$dumb_push) {
 	$dumb_push = run_git('config --get --bool mediawiki.dumbPush');
 }
 chomp($dumb_push);
@@ -670,7 +670,7 @@ sub fetch_mw_revisions_for_page {
 			push(@page_revs, $page_rev_ids);
 			$revnum++;
 		}
-		last unless $result->{'query-continue'};
+		last if (!$result->{'query-continue'});
 		$query->{rvstartid} = $result->{'query-continue'}->{revisions}->{rvstartid};
 	}
 	if ($shallow_import && @page_revs) {
@@ -1242,7 +1242,7 @@ sub mw_push_revision {
 				die("Unknown error from mw_push_file()\n");
 			}
 		}
-		unless ($dumb_push) {
+		if (!$dumb_push) {
 			run_git(qq(notes --ref=${remotename}/mediawiki add -f -m "mediawiki_revision: ${mw_revision}" ${sha1_commit}));
 			run_git(qq(update-ref -m "Git-MediaWiki push" refs/mediawiki/${remotename}/master ${sha1_commit} ${sha1_child}));
 		}
@@ -1322,7 +1322,7 @@ sub get_mw_namespace_id {
 	my $ns = $namespace_id{$name};
 	my $id;
 
-	unless (defined $ns) {
+	if (!defined $ns) {
 		print {*STDERR} "No such namespace ${name} on MediaWiki.\n";
 		$ns = {is_namespace => 0};
 		$namespace_id{$name} = $ns;
-- 
1.7.9.5

[PATCH v2 19/22] git-remote-mediawiki: Don't use quotes for empty strings

[Célestin Matte]

Empty strings are replaced by an $EMPTY constant.

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 123730f..e6dc6db 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -41,6 +41,8 @@ Readonly my $NULL_SHA1 => '0000000000000000000000000000000000000000';
 # Used on Git's side to reflect empty edit messages on the wiki
 Readonly my $EMPTY_MESSAGE => '*Empty MediaWiki Message*';
 
+Readonly my $EMPTY => q{};
+
 if (@ARGV != 2) {
 	exit_error_usage();
 }
@@ -163,11 +165,11 @@ sub parse_commands {
 		mw_list($cmd[1]);
 	} elsif ($cmd[0] eq 'import') {
 		die("Invalid arguments for import\n")
-		    if ($cmd[1] eq "" || defined($cmd[2]));
+		    if ($cmd[1] eq $EMPTY || defined($cmd[2]));
 		mw_import($cmd[1]);
 	} elsif ($cmd[0] eq 'option') {
 		die("Too many arguments for option\n")
-		    if ($cmd[1] eq "" || $cmd[2] eq "" || defined($cmd[3]));
+		    if ($cmd[1] eq $EMPTY || $cmd[2] eq $EMPTY || defined($cmd[3]));
 		mw_option($cmd[1],$cmd[2]);
 	} elsif ($cmd[0] eq 'push') {
 		mw_push($cmd[1]);
@@ -558,7 +560,7 @@ sub mediawiki_clean {
 	# Mediawiki does not allow blank space at the end of a page and ends with a single \n.
 	# This function right trims a string and adds a \n at the end to follow this rule
 	$string =~ s/\s+$//;
-	if ($string eq "" && $page_created) {
+	if ($string eq $EMPTY && $page_created) {
 		# Creating empty pages is forbidden.
 		$string = $EMPTY_CONTENT;
 	}
@@ -569,7 +571,7 @@ sub mediawiki_clean {
 sub mediawiki_smudge {
 	my $string = shift;
 	if ($string eq $EMPTY_CONTENT) {
-		$string = "";
+		$string = $EMPTY;
 	}
 	# This \n is important. This is due to mediawiki's way to handle end of files.
 	return "${string}\n";
@@ -995,7 +997,7 @@ sub mw_upload_file {
 	} else {
 		# Don't let perl try to interpret file content as UTF-8 => use "raw"
 		my $content = run_git("cat-file blob ${new_sha1}", 'raw');
-		if ($content ne "") {
+		if ($content ne $EMPTY) {
 			mw_connect_maybe();
 			$mediawiki->{config}->{upload_url} =
 				"${url}/index.php/Special:Upload";
@@ -1037,7 +1039,7 @@ sub mw_push_file {
 	my $newrevid;
 
 	if ($summary eq $EMPTY_MESSAGE) {
-		$summary = '';
+		$summary = $EMPTY;
 	}
 
 	my $new_sha1 = $diff_info_split[3];
@@ -1048,7 +1050,7 @@ sub mw_push_file {
 
 	my ($title, $extension) = $complete_file_name =~ /^(.*)\.([^\.]*)$/;
 	if (!defined($extension)) {
-		$extension = "";
+		$extension = $EMPTY;
 	}
 	if ($extension eq 'mw') {
 		my $ns = get_mw_namespace_id_for_page($complete_file_name);
@@ -1116,7 +1118,7 @@ sub mw_push {
 		if ($force) {
 			print {*STDERR} "Warning: forced push not allowed on a MediaWiki.\n";
 		}
-		if ($local eq "") {
+		if ($local eq $EMPTY) {
 			print {*STDERR} "Cannot delete remote branch on a MediaWiki\n";
 			print {*STDOUT} "error ${remote} cannot delete\n";
 			next;
-- 
1.7.9.5

[PATCH v2 20/22] git-remote-mediawiki: Put non-trivial numeric values in constants.

[Célestin Matte]

Non-trivial numeric values (e.g., different from 0, 1 and 2) are placed in
constants at the top of the code to be easily modifiable and to make more sense

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index e6dc6db..94a0411 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -43,6 +43,16 @@ Readonly my $EMPTY_MESSAGE => '*Empty MediaWiki Message*';
 
 Readonly my $EMPTY => q{};
 
+# Number of pages taken into account at once in submodule get_mw_page_list
+Readonly my $SLICE_SIZE => 50;
+
+# Number of linked mediafile to get at once in get_linked_mediafiles
+# The query is split in small batches because of the MW API limit of
+# the number of links to be returned (500 links max).
+Readonly my $BATCH_SIZE => 10;
+
+Readonly my $HTTP_CODE_OK => 200;
+
 if (@ARGV != 2) {
 	exit_error_usage();
 }
@@ -226,13 +236,13 @@ sub get_mw_page_list {
 	my $pages = shift;
 	my @some_pages = @$page_list;
 	while (@some_pages) {
-		my $last_page = 50;
+		my $last_page = $SLICE_SIZE;
 		if ($#some_pages < $last_page) {
 			$last_page = $#some_pages;
 		}
 		my @slice = @some_pages[0..$last_page];
 		get_mw_first_pages(\@slice, $pages);
-		@some_pages = @some_pages[51..$#some_pages];
+		@some_pages = @some_pages[($SLICE_SIZE + 1)..$#some_pages];
 	}
 	return;
 }
@@ -388,9 +398,7 @@ sub get_linked_mediafiles {
 	my $pages = shift;
 	my @titles = map { $_->{title} } values(%{$pages});
 
-	# The query is split in small batches because of the MW API limit of
-	# the number of links to be returned (500 links max).
-	my $batch = 10;
+	my $batch = $BATCH_SIZE;
 	while (@titles) {
 		if ($#titles < $batch) {
 			$batch = $#titles;
@@ -472,7 +480,7 @@ sub download_mw_mediafile {
 	my $download_url = shift;
 
 	my $response = $mediawiki->{ua}->get($download_url);
-	if ($response->code == 200) {
+	if ($response->code == $HTTP_CODE_OK) {
 		return $response->decoded_content;
 	} else {
 		print {*STDERR} "Error downloading mediafile from :\n";
-- 
1.7.9.5

[PATCH v2 21/22] git-remote-mediawiki: Fix a typo ("mediwiki" instead of "mediawiki")

[Célestin Matte]

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 94a0411..be860c8 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -1093,14 +1093,14 @@ sub mw_push_file {
 				# edit conflicts, considered as non-fast-forward
 				print {*STDERR} 'Warning: Error ' .
 				    $mediawiki->{error}->{code} .
-				    ' from mediwiki: ' . $mediawiki->{error}->{details} .
+				    ' from mediawiki: ' . $mediawiki->{error}->{details} .
 				    ".\n";
 				return ($oldrevid, 'non-fast-forward');
 			} else {
 				# Other errors. Shouldn't happen => just die()
 				die 'Fatal: Error ' .
 				    $mediawiki->{error}->{code} .
-				    ' from mediwiki: ' . $mediawiki->{error}->{details} . "\n";
+				    ' from mediawiki: ' . $mediawiki->{error}->{details} . "\n";
 			}
 		}
 		$newrevid = $result->{edit}->{newrevid};
-- 
1.7.9.5

[PATCH v2 22/22] git-remote-mediawiki: Clearly rewrite double dereference

[Célestin Matte]

@$var structures are re-written in the following way: @{$var}
It makes them more readable.

Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 contrib/mw-to-git/git-remote-mediawiki.perl |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index be860c8..a13c33f 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -234,7 +234,7 @@ sub get_mw_tracked_pages {
 sub get_mw_page_list {
 	my $page_list = shift;
 	my $pages = shift;
-	my @some_pages = @$page_list;
+	my @some_pages = @{$page_list};
 	while (@some_pages) {
 		my $last_page = $SLICE_SIZE;
 		if ($#some_pages < $last_page) {
@@ -736,7 +736,7 @@ sub import_file_revision {
 
 	print {*STDOUT} "commit refs/mediawiki/${remotename}/master\n";
 	print {*STDOUT} "mark :${n}\n";
-	print {*STDOUT} "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
+	print {*STDOUT} "committer ${author} <${author}\@{${wiki_name}}> " . $date->epoch . " +0000\n";
 	literal_data($comment);
 
 	# If it's not a clone, we need to know where to start from
@@ -762,7 +762,7 @@ sub import_file_revision {
 		print {*STDOUT} "reset refs/notes/${remotename}/mediawiki\n";
 	}
 	print {*STDOUT} "commit refs/notes/${remotename}/mediawiki\n";
-	print {*STDOUT} "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
+	print {*STDOUT} "committer ${author} <${author}\@{${wiki_name}}> " . $date->epoch . " +0000\n";
 	literal_data('Note added by git-mediawiki during import');
 	if (!$full_import && $n == 1) {
 		print {*STDOUT} "from refs/notes/${remotename}/mediawiki^0\n";
@@ -884,7 +884,7 @@ sub mw_import_revids {
 	my $n_actual = 0;
 	my $last_timestamp = 0; # Placeholer in case $rev->timestamp is undefined
 
-	foreach my $pagerevid (@$revision_ids) {
+	foreach my $pagerevid (@{$revision_ids}) {
 	        # Count page even if we skip it, since we display
 		# $n/$total and $total includes skipped pages.
 		$n++;
@@ -919,7 +919,7 @@ sub mw_import_revids {
 		my $page_title = $result_page->{title};
 
 		if (!exists($pages->{$page_title})) {
-			print {*STDERR} "${n}/", scalar(@$revision_ids),
+			print {*STDERR} "${n}/", scalar(@{$revision_ids}),
 				": Skipping revision #$rev->{revid} of ${page_title}\n";
 			next;
 		}
@@ -952,7 +952,7 @@ sub mw_import_revids {
 		# If this is a revision of the media page for new version
 		# of a file do one common commit for both file and media page.
 		# Else do commit only for that page.
-		print {*STDERR} "${n}/", scalar(@$revision_ids), ": Revision #$rev->{revid} of $commit{title}\n";
+		print {*STDERR} "${n}/", scalar(@{$revision_ids}), ": Revision #$rev->{revid} of $commit{title}\n";
 		import_file_revision(\%commit, ($fetch_from == 1), $n_actual, \%mediafile);
 	}
 
-- 
1.7.9.5

Re: [PATCH v2 22/22] git-remote-mediawiki: Clearly rewrite double dereference

[Eric Sunshine]

On Fri, Jun 7, 2013 at 5:42 PM, Célestin Matte
<celestin.matte@ensimag.fr> wrote:
> @$var structures are re-written in the following way: @{$var}
> It makes them more readable.
>
> Signed-off-by: Célestin Matte <celestin.matte@ensimag.fr>
> Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
> ---
>  contrib/mw-to-git/git-remote-mediawiki.perl |   12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
> index be860c8..a13c33f 100755
> --- a/contrib/mw-to-git/git-remote-mediawiki.perl
> +++ b/contrib/mw-to-git/git-remote-mediawiki.perl
> @@ -234,7 +234,7 @@ sub get_mw_tracked_pages {
>  sub get_mw_page_list {
>         my $page_list = shift;
>         my $pages = shift;
> -       my @some_pages = @$page_list;
> +       my @some_pages = @{$page_list};
>         while (@some_pages) {
>                 my $last_page = $SLICE_SIZE;
>                 if ($#some_pages < $last_page) {
> @@ -736,7 +736,7 @@ sub import_file_revision {
>
>         print {*STDOUT} "commit refs/mediawiki/${remotename}/master\n";
>         print {*STDOUT} "mark :${n}\n";
> -       print {*STDOUT} "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
> +       print {*STDOUT} "committer ${author} <${author}\@{${wiki_name}}> " . $date->epoch . " +0000\n";

In this case, \@ is a literal '@' in the string, so it is not a @$var
reference, thus this change is incorrect.

>         literal_data($comment);
>
>         # If it's not a clone, we need to know where to start from
> @@ -762,7 +762,7 @@ sub import_file_revision {
>                 print {*STDOUT} "reset refs/notes/${remotename}/mediawiki\n";
>         }
>         print {*STDOUT} "commit refs/notes/${remotename}/mediawiki\n";
> -       print {*STDOUT} "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
> +       print {*STDOUT} "committer ${author} <${author}\@{${wiki_name}}> " . $date->epoch . " +0000\n";

Ditto: \@ is a literal '@' in the string.

>         literal_data('Note added by git-mediawiki during import');
>         if (!$full_import && $n == 1) {
>                 print {*STDOUT} "from refs/notes/${remotename}/mediawiki^0\n";
> @@ -884,7 +884,7 @@ sub mw_import_revids {
>         my $n_actual = 0;
>         my $last_timestamp = 0; # Placeholer in case $rev->timestamp is undefined
>
> -       foreach my $pagerevid (@$revision_ids) {
> +       foreach my $pagerevid (@{$revision_ids}) {
>                 # Count page even if we skip it, since we display
>                 # $n/$total and $total includes skipped pages.
>                 $n++;
> @@ -919,7 +919,7 @@ sub mw_import_revids {
>                 my $page_title = $result_page->{title};
>
>                 if (!exists($pages->{$page_title})) {
> -                       print {*STDERR} "${n}/", scalar(@$revision_ids),
> +                       print {*STDERR} "${n}/", scalar(@{$revision_ids}),
>                                 ": Skipping revision #$rev->{revid} of ${page_title}\n";
>                         next;
>                 }
> @@ -952,7 +952,7 @@ sub mw_import_revids {
>                 # If this is a revision of the media page for new version
>                 # of a file do one common commit for both file and media page.
>                 # Else do commit only for that page.
> -               print {*STDERR} "${n}/", scalar(@$revision_ids), ": Revision #$rev->{revid} of $commit{title}\n";
> +               print {*STDERR} "${n}/", scalar(@{$revision_ids}), ": Revision #$rev->{revid} of $commit{title}\n";
>                 import_file_revision(\%commit, ($fetch_from == 1), $n_actual, \%mediafile);
>         }
>
> --