[PATCH v3 2/3] gitweb: introduce localtime feature

[Jakub Narebski <jnareb@gmail.com>]

From: Kevin Cernekee <cernekee@gmail.com>

With this feature enabled, all timestamps are shown in the local
timezone instead of GMT.  The timezone is taken from the appropriate
timezone string stored in the commit object.

This is useful if most of contributors (to a project) are based in a
single office, all within the same timezone.  In such case local time
is more useful than GMT / UTC time that gitweb uses by default, and
which is better choice for geographically scattered contributors.

This change does not affect relative timestamps (e.g. "5 hours ago"),
and neither does it affect 'patch' and 'patches' views which already
use localtime because they are generated by "git format-patch".

Affected views include:
* 'summary' view, "last change" field (commit time from latest change)
* 'log' view, author time
* 'commit' and 'commitdiff' views, author/committer time
* 'tag' view, tagger time

In the case of 'commit', 'commitdiff' and 'tag' views gitweb used to
print both GMT time and time in timezone of author/tagger/comitter,
marking localtime with "atnight" as appropriate; after this commit
gitweb shows only local time.  Marking localtime with "atnight" when
needed is left for subsequent commit.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Jakub Narebski <jnareb@gmail.com>
---
Changes from original v2 version by Kevin Cernekee:

* Expanded commit message, explaining "whys" behind introducing this new
  feature (why and when can it be useful), as per

    http://thread.gmane.org/gmane.comp.version-control.git/169096/focus=169284

* Minor whitespace changes

 gitweb/gitweb.perl |   21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 3960d34..1df3652 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -504,6 +504,19 @@ our %feature = (
 		'sub' => sub { feature_bool('remote_heads', @_) },
 		'override' => 0,
 		'default' => [0]},
+
+	# Use the author/commit localtime rather than GMT for all timestamps.
+	# Disabled by default.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'localtime'}{'default'} = [1];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'localtime'}{'override'} = 1;
+	# and in project config gitweb.localtime = 0|1;
+	'localtime' => {
+		'sub' => sub { feature_bool('localtime', @_) },
+		'override' => 0,
+		'default' => [0]},
 );
 
 sub gitweb_get_feature {
@@ -2930,6 +2943,12 @@ sub parse_date {
 	$date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
 	                          1900+$year, $mon+1, $mday,
 	                          $hour, $min, $sec, $tz);
+
+	if (gitweb_check_feature('localtime')) {
+		$date{'rfc2822'} = sprintf "%s, %d %s %4d %02d:%02d:%02d $tz",
+		                   $days[$wday], $mday, $months[$mon],
+		                   1900+$year, $hour ,$min, $sec;
+	}
 	return %date;
 }
 
@@ -3992,7 +4011,7 @@ sub git_print_authorship_rows {
 		      "</td></tr>\n" .
 		      "<tr>" .
 		      "<td></td><td> $wd{'rfc2822'}";
-		print_local_time(%wd);
+		print_local_time(%wd) if !gitweb_check_feature('localtime');
 		print "</td>" .
 		      "</tr>\n";
 	}
-- 
1.7.3