* [PATCH] git-cvsimport-script: handling of tags
@ 2005-09-06 17:36 H. Peter Anvin
2005-09-06 18:56 ` H. Peter Anvin
` (2 more replies)
0 siblings, 3 replies; 10+ messages in thread
From: H. Peter Anvin @ 2005-09-06 17:36 UTC (permalink / raw)
To: Git Mailing List, Junio C Hamano
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This patch changes git-cvsimport-script so that it creates tag objects
instead of refs to commits, and adds an option, -u, to convert
underscores in branch and tag names to dots (since CVS doesn't allow
dots in branches and tags.)
Pullable tree at master.kernel.org:/home/hpa/git/cvsimport.git/
-hpa
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diff --git a/Documentation/git-cvsimport-script.txt b/Documentation/git-cvsimport-script.txt
--- a/Documentation/git-cvsimport-script.txt
+++ b/Documentation/git-cvsimport-script.txt
@@ -44,6 +44,9 @@ OPTIONS
to avoid noisy changesets. Highly recommended, but off by default
to preserve compatibility with early imported trees.
+-u::
+ Convert underscores in tag and branch names to dots.
+
-o <branch-for-HEAD>::
The 'HEAD' branch from CVS is imported to the 'origin' branch within
the git repository, as 'HEAD' already has a special meaning for git.
diff --git a/git-cvsimport-script b/git-cvsimport-script
--- a/git-cvsimport-script
+++ b/git-cvsimport-script
@@ -24,23 +24,24 @@ use Time::Local;
use IO::Socket;
use IO::Pipe;
use POSIX qw(strftime dup2);
+use IPC::Open2;
$SIG{'PIPE'}="IGNORE";
$ENV{'TZ'}="UTC";
-our($opt_h,$opt_o,$opt_v,$opt_k,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_s,$opt_m,$opt_M);
+our($opt_h,$opt_o,$opt_v,$opt_k,$opt_u,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_s,$opt_m,$opt_M);
sub usage() {
print STDERR <<END;
Usage: ${\basename $0} # fetch/update GIT from CVS
- [ -o branch-for-HEAD ] [ -h ] [ -v ] [ -d CVSROOT ]
- [ -p opts-for-cvsps ] [ -C GIT_repository ] [ -z fuzz ]
- [ -i ] [ -k ] [-s subst] [ -m ] [ -M regex] [ CVS_module ]
+ [-o branch-for-HEAD] [-h] [-v] [-d CVSROOT]
+ [-p opts-for-cvsps] [-C GIT_repository] [-z fuzz]
+ [-i] [-k] [-u] [-s subst] [-m] [-M regex] [CVS_module]
END
exit(1);
}
-getopts("hivmko:d:p:C:z:s:M:") or usage();
+getopts("hivmkuo:d:p:C:z:s:M:") or usage();
usage if $opt_h;
@ARGV <= 1 or usage();
@@ -628,13 +629,37 @@ my $commit = sub {
or die "Cannot write branch $branch for update: $!\n";
if($tag) {
- open(C,">$git_dir/refs/tags/$tag")
- or die "Cannot create tag $tag: $!\n";
- print C "$cid\n"
- or die "Cannot write tag $branch: $!\n";
+ my($in, $out) = ('','');
+ my($xtag) = $tag;
+ $xtag =~ s/\s+\*\*.*$//; # Remove stuff like ** INVALID ** and ** FUNKY **
+ $xtag =~ tr/_/\./ if ( $opt_u );
+
+ my $pid = open2($in, $out, 'git-mktag');
+ print $out "object $cid\n".
+ "type commit\n".
+ "tag $xtag\n".
+ "tagger $author <$author>\n"
+ or die "Cannot create tag object $xtag: $!\n";
+ close($out)
+ or die "Cannot create tag object $xtag: $!\n";
+
+ my $tagobj = <$in>;
+ chomp $tagobj;
+
+ if ( !close($in) or waitpid($pid, 0) != $pid or
+ $? != 0 or $tagobj !~ /^[0123456789abcdef]{40}$/ ) {
+ die "Cannot create tag object $xtag: $!\n";
+ }
+
+
+ open(C,">$git_dir/refs/tags/$xtag")
+ or die "Cannot create tag $xtag: $!\n";
+ print C "$tagobj\n"
+ or die "Cannot write tag $xtag: $!\n";
close(C)
- or die "Cannot write tag $branch: $!\n";
- print "Created tag '$tag' on '$branch'\n" if $opt_v;
+ or die "Cannot write tag $xtag: $!\n";
+
+ print "Created tag '$xtag' on '$branch'\n" if $opt_v;
}
};
^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-06 17:36 [PATCH] git-cvsimport-script: handling of tags H. Peter Anvin
@ 2005-09-06 18:56 ` H. Peter Anvin
2005-09-06 20:24 ` H. Peter Anvin
2005-09-06 19:01 ` Junio C Hamano
2005-09-07 2:44 ` Martin Langhoff
2 siblings, 1 reply; 10+ messages in thread
From: H. Peter Anvin @ 2005-09-06 18:56 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Git Mailing List, Junio C Hamano
H. Peter Anvin wrote:
> This patch changes git-cvsimport-script so that it creates tag objects
> instead of refs to commits, and adds an option, -u, to convert
> underscores in branch and tag names to dots (since CVS doesn't allow
> dots in branches and tags.)
>
> Pullable tree at master.kernel.org:/home/hpa/git/cvsimport.git/
I should probably point out that there are still bugs in
git-cvsimport-script; for one thing, it seems to fail to register a tag
associated with the head, and I have yet to get the "recognize merge"
feature to actually work. It's also possible -- but I haven't verified
it -- that two tags which are aliases may not be properly registered.
-hpa
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-06 18:56 ` H. Peter Anvin
@ 2005-09-06 20:24 ` H. Peter Anvin
2005-09-06 21:21 ` Martin Langhoff
0 siblings, 1 reply; 10+ messages in thread
From: H. Peter Anvin @ 2005-09-06 20:24 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Git Mailing List, Junio C Hamano
H. Peter Anvin wrote:
> H. Peter Anvin wrote:
>
>> This patch changes git-cvsimport-script so that it creates tag objects
>> instead of refs to commits, and adds an option, -u, to convert
>> underscores in branch and tag names to dots (since CVS doesn't allow
>> dots in branches and tags.)
>>
>> Pullable tree at master.kernel.org:/home/hpa/git/cvsimport.git/
>
>
> I should probably point out that there are still bugs in
> git-cvsimport-script; for one thing, it seems to fail to register a tag
> associated with the head, and I have yet to get the "recognize merge"
> feature to actually work. It's also possible -- but I haven't verified
> it -- that two tags which are aliases may not be properly registered.
>
I just verified this; git-cvsimport-script will not handle more than one
tag per commit.
-hpa
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-06 20:24 ` H. Peter Anvin
@ 2005-09-06 21:21 ` Martin Langhoff
2005-09-06 21:33 ` H. Peter Anvin
0 siblings, 1 reply; 10+ messages in thread
From: Martin Langhoff @ 2005-09-06 21:21 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Git Mailing List, Junio C Hamano
On 9/7/05, H. Peter Anvin <hpa@zytor.com> wrote:
> > I should probably point out that there are still bugs in
> > git-cvsimport-script; for one thing, it seems to fail to register a tag
> > associated with the head, and I have yet to get the "recognize merge"
> > feature to actually work. It's also possible -- but I haven't verified
> > it -- that two tags which are aliases may not be properly registered.
> I just verified this; git-cvsimport-script will not handle more than one
> tag per commit.
Tell me more about how you are trying the 'recognize merge'. It is a
pretty unsophisticated thing, as it trusts the commit message in the
first place. But when it works, it works.
I have a more refined merge detection already working in the Arch
imports -- patch coming soon -- but with cvs it is pretty hard to do.
cheers,
martin
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-06 21:21 ` Martin Langhoff
@ 2005-09-06 21:33 ` H. Peter Anvin
2005-09-06 22:59 ` Martin Langhoff
0 siblings, 1 reply; 10+ messages in thread
From: H. Peter Anvin @ 2005-09-06 21:33 UTC (permalink / raw)
To: martin.langhoff; +Cc: Git Mailing List, Junio C Hamano
Martin Langhoff wrote:
>
> Tell me more about how you are trying the 'recognize merge'. It is a
> pretty unsophisticated thing, as it trusts the commit message in the
> first place. But when it works, it works.
>
Perhaps it would be good to know what it expects in the commit message?
My style has always be to use tags for merges; tag the origin branch as
well as before and after on the receiving branch.
-hpa
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-06 21:33 ` H. Peter Anvin
@ 2005-09-06 22:59 ` Martin Langhoff
2005-09-06 23:19 ` H. Peter Anvin
0 siblings, 1 reply; 10+ messages in thread
From: Martin Langhoff @ 2005-09-06 22:59 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Git Mailing List, Junio C Hamano
On 9/7/05, H. Peter Anvin <hpa@zytor.com> wrote:
> Martin Langhoff wrote:
> >
> > Tell me more about how you are trying the 'recognize merge'. It is a
> > pretty unsophisticated thing, as it trusts the commit message in the
> > first place. But when it works, it works.
> >
>
> Perhaps it would be good to know what it expects in the commit message?
>From the source, with line numbers:
80 our @mergerx = ();
81 if ($opt_m) {
82 @mergerx = ( qr/\W(?:from|of|merge|merging|merged) (\w+)/i );
83 }
84 if ($opt_M) {
85 push (@mergerx, qr/$opt_M/);
86 }
If your commit messages have a particular format, feed -M a regex that
captures the branchname/tagname in $1.
> My style has always be to use tags for merges; tag the origin branch as
> well as before and after on the receiving branch.
Do you move the tags with cvs tag -F? If that's the case, the data you
need to merge is lost... otherwise, you could hack an alternative
merge detection based on your tagnames.
cheers,
martin
^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-06 22:59 ` Martin Langhoff
@ 2005-09-06 23:19 ` H. Peter Anvin
0 siblings, 0 replies; 10+ messages in thread
From: H. Peter Anvin @ 2005-09-06 23:19 UTC (permalink / raw)
To: martin.langhoff; +Cc: Git Mailing List, Junio C Hamano
Martin Langhoff wrote:
>
>>My style has always be to use tags for merges; tag the origin branch as
>>well as before and after on the receiving branch.
>
> Do you move the tags with cvs tag -F? If that's the case, the data you
> need to merge is lost... otherwise, you could hack an alternative
> merge detection based on your tagnames.
>
No, there are three tags:
before-merge-foo
| after-merge-foo
| |
branch 1 ---*--*----
/
/
branch 2 ---*-------
|
merge-point-foo
That's why I was a bit confused. I thought most people did something
similar.
-hpa
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-06 17:36 [PATCH] git-cvsimport-script: handling of tags H. Peter Anvin
2005-09-06 18:56 ` H. Peter Anvin
@ 2005-09-06 19:01 ` Junio C Hamano
2005-09-07 2:44 ` Martin Langhoff
2 siblings, 0 replies; 10+ messages in thread
From: Junio C Hamano @ 2005-09-06 19:01 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: git
"H. Peter Anvin" <hpa@zytor.com> writes:
> This patch changes git-cvsimport-script so that it creates tag objects
> instead of refs to commits, and adds an option, -u, to convert
> underscores in branch and tag names to dots (since CVS doesn't allow
> dots in branches and tags.)
Looks good. Thanks.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-06 17:36 [PATCH] git-cvsimport-script: handling of tags H. Peter Anvin
2005-09-06 18:56 ` H. Peter Anvin
2005-09-06 19:01 ` Junio C Hamano
@ 2005-09-07 2:44 ` Martin Langhoff
2005-09-07 2:48 ` H. Peter Anvin
2 siblings, 1 reply; 10+ messages in thread
From: Martin Langhoff @ 2005-09-07 2:44 UTC (permalink / raw)
To: H. Peter Anvin; +Cc: Git Mailing List, Junio C Hamano
On 9/7/05, H. Peter Anvin <hpa@zytor.com> wrote:
> This patch changes git-cvsimport-script so that it creates tag objects
> instead of refs to commits, and adds an option, -u, to convert
> underscores in branch and tag names to dots (since CVS doesn't allow
> dots in branches and tags.)
looks good. Will it add proper tag objects for tags already imported
and for tags added to the project post-initial-git-import?
cheers,
martin
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH] git-cvsimport-script: handling of tags
2005-09-07 2:44 ` Martin Langhoff
@ 2005-09-07 2:48 ` H. Peter Anvin
0 siblings, 0 replies; 10+ messages in thread
From: H. Peter Anvin @ 2005-09-07 2:48 UTC (permalink / raw)
To: martin.langhoff; +Cc: Git Mailing List, Junio C Hamano
Martin Langhoff wrote:
> On 9/7/05, H. Peter Anvin <hpa@zytor.com> wrote:
>
>>This patch changes git-cvsimport-script so that it creates tag objects
>>instead of refs to commits, and adds an option, -u, to convert
>>underscores in branch and tag names to dots (since CVS doesn't allow
>>dots in branches and tags.)
>
>
> looks good. Will it add proper tag objects for tags already imported
> and for tags added to the project post-initial-git-import?
>
No and yes, respectively.
I incorrectly stated it renamed both branches and tags. It currently
only renames tags. I'm trying to get branch renaming to work, but it
seems to be a lot more work to get right.
-hpa
^ permalink raw reply [flat|nested] 10+ messages in thread
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2005-09-06 17:36 [PATCH] git-cvsimport-script: handling of tags H. Peter Anvin
2005-09-06 18:56 ` H. Peter Anvin
2005-09-06 20:24 ` H. Peter Anvin
2005-09-06 21:21 ` Martin Langhoff
2005-09-06 21:33 ` H. Peter Anvin
2005-09-06 22:59 ` Martin Langhoff
2005-09-06 23:19 ` H. Peter Anvin
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