-sub rcs_notify () { #{{{
- # Send notification mail to subscribed users.
- #
- # In usual Git usage, hooks/update script is presumed to send
- # notification mails (see git-receive-pack(1)). But we prefer
- # hooks/post-update to support IkiWiki commits coming from a
- # cloned repository (through command line) because post-update
- # is called _after_ each ref in repository is updated (update
- # hook is called _before_ the repository is updated). Since
- # post-update hook does not accept command line arguments, we
- # don't have an $ENV variable in this function.
- #
- # Here, we rely on a simple fact: we can extract all parts of the
- # notification content by parsing the "HEAD" commit (which also
- # triggers a refresh of IkiWiki pages) and we can obtain the diff
- # by comparing HEAD and HEAD^ (the previous commit).
-
- my $sha1 = 'HEAD'; # the commit which triggers this action
-
- my $ci = git_commit_info($sha1);
- return if !defined $ci;
-
- my @changed_pages = map { $_->{'file'} } @{ $ci->{'details'} };
-
- my ($user, $message);
- if (@{ $ci->{'comment'} }[0] =~ m/$config{web_commit_regexp}/) {
- $user = defined $2 ? "$2" : "$3";
- $message = $4;
+sub rcs_diff ($) { #{{{
+ my $rev=shift;
+ my ($sha1) = $rev =~ /^($sha1_pattern)$/; # untaint
+ my @lines;
+ foreach my $line (run_or_non("git", "show", $sha1)) {
+ if (@lines || $line=~/^diff --git/) {
+ push @lines, $line."\n";
+ }
+ }
+ if (wantarray) {
+ return @lines;