X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/5c6f7a8d1b805001a3d1ee912683755cec773682..1572c3c376df36ea09e27a1ea437e3a75cdf0f84:/IkiWiki/Plugin/git.pm

diff --git a/IkiWiki/Plugin/git.pm b/IkiWiki/Plugin/git.pm
index 48e71aa9a..3117e4291 100644
--- a/IkiWiki/Plugin/git.pm
+++ b/IkiWiki/Plugin/git.pm
@@ -9,7 +9,7 @@ use open qw{:utf8 :std};
 
 my $sha1_pattern     = qr/[0-9a-fA-F]{40}/; # pattern to validate Git sha1sums
 my $dummy_commit_msg = 'dummy commit';      # message to skip in recent changes
-my $no_chdir=0;
+my $git_dir=undef;
 
 sub import {
 	hook(type => "checkconfig", id => "git", call => \&checkconfig);
@@ -152,10 +152,11 @@ sub genwrapper {
 }
 
 sub safe_git (&@) {
-	# Start a child process safely without resorting /bin/sh.
-	# Return command output or success state (in scalar context).
+	# Start a child process safely without resorting to /bin/sh.
+	# Returns command output (in list content) or success state
+	# (in scalar context), or runs the specified data handler.
 
-	my ($error_handler, @cmdline) = @_;
+	my ($error_handler, $data_handler, @cmdline) = @_;
 
 	my $pid = open my $OUT, "-|";
 
@@ -164,9 +165,13 @@ sub safe_git (&@) {
 	if (!$pid) {
 		# In child.
 		# Git commands want to be in wc.
-		if (! $no_chdir) {
+		if (! defined $git_dir) {
 			chdir $config{srcdir}
-			    or error("Cannot chdir to $config{srcdir}: $!");
+			    or error("cannot chdir to $config{srcdir}: $!");
+		}
+		else {
+			chdir $git_dir
+			    or error("cannot chdir to $git_dir: $!");
 		}
 		exec @cmdline or error("Cannot exec '@cmdline': $!");
 	}
@@ -183,7 +188,12 @@ sub safe_git (&@) {
 
 		chomp;
 
-		push @lines, $_;
+		if (! defined $data_handler) {
+			push @lines, $_;
+		}
+		else {
+			last unless $data_handler->($_);
+		}
 	}
 
 	close $OUT;
@@ -193,9 +203,9 @@ sub safe_git (&@) {
 	return wantarray ? @lines : ($? == 0);
 }
 # Convenient wrappers.
-sub run_or_die ($@) { safe_git(\&error, @_) }
-sub run_or_cry ($@) { safe_git(sub { warn @_ },  @_) }
-sub run_or_non ($@) { safe_git(undef,            @_) }
+sub run_or_die ($@) { safe_git(\&error, undef, @_) }
+sub run_or_cry ($@) { safe_git(sub { warn @_ }, undef, @_) }
+sub run_or_non ($@) { safe_git(undef, undef, @_) }
 
 
 sub merge_past ($$$) {
@@ -492,16 +502,16 @@ sub rcs_commit (@) {
 		return $conflict if defined $conflict;
 	}
 
-	rcs_add($params{file});
-	return rcs_commit_staged(
-		message => $params{message},
-		session => $params{session},
-	);
+	return rcs_commit_helper(@_);
 }
 
 sub rcs_commit_staged (@) {
 	# Commits all staged changes. Changes can be staged using rcs_add,
 	# rcs_remove, and rcs_rename.
+	return rcs_commit_helper(@_);
+}
+
+sub rcs_commit_helper (@) {
 	my %params=@_;
 	
 	my %env=%ENV;
@@ -542,10 +552,12 @@ sub rcs_commit_staged (@) {
 			$params{message}.=".";
 		}
 	}
-	push @opts, '-q';
-	# git commit returns non-zero if file has not been really changed.
-	# so we should ignore its exit status (hence run_or_non).
-	if (run_or_non('git', 'commit', @opts, '-m', $params{message})) {
+	if (exists $params{file}) {
+		push @opts, '--', $params{file};
+	}
+	# git commit returns non-zero if nothing really changed.
+	# So we should ignore its exit status (hence run_or_non).
+	if (run_or_non('git', 'commit', '-m', $params{message}, '-q', @opts)) {
 		if (length $config{gitorigin_branch}) {
 			run_or_cry('git', 'push', $config{gitorigin_branch});
 		}
@@ -657,15 +669,19 @@ sub rcs_recentchanges ($) {
 	return @rets;
 }
 
-sub rcs_diff ($) {
+sub rcs_diff ($;$) {
 	my $rev=shift;
+	my $maxlines=shift;
 	my ($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";
-		}
-	}
+	my $addlines=sub {
+		my $line=shift;
+		return if defined $maxlines && @lines == $maxlines;
+		push @lines, $line."\n"
+			if (@lines || $line=~/^diff --git/);
+		return 1;
+	};
+	safe_git(undef, $addlines, "git", "show", $sha1);
 	if (wantarray) {
 		return @lines;
 	}
@@ -684,7 +700,7 @@ sub findtimes ($$) {
 	if (! keys %time_cache) {
 		my $date;
 		foreach my $line (run_or_die('git', 'log',
-				'--pretty=format:%ct',
+				'--pretty=format:%at',
 				'--name-only', '--relative')) {
 			if (! defined $date && $line =~ /^(\d+)$/) {
 				$date=$line;
@@ -721,14 +737,13 @@ sub rcs_getmtime ($) {
 }
 
 {
-my $git_root;
-
+my $ret;
 sub git_find_root {
 	# The wiki may not be the only thing in the git repo.
 	# Determine if it is in a subdirectory by examining the srcdir,
 	# and its parents, looking for the .git directory.
 
-	return $git_root if defined $git_root;
+	return @$ret if defined $ret;
 	
 	my $subdir="";
 	my $dir=$config{srcdir};
@@ -740,15 +755,17 @@ sub git_find_root {
 		}
 	}
 
-	return $git_root=$subdir;
+	$ret=[$subdir, $dir];
+	return @$ret;
 }
 
 }
 
 sub git_parse_changes {
+	my $reverted = shift;
 	my @changes = @_;
 
-	my $subdir = git_find_root();
+	my ($subdir, $rootdir) = git_find_root();
 	my @rets;
 	foreach my $ci (@changes) {
 		foreach my $detail (@{ $ci->{'details'} }) {
@@ -766,11 +783,11 @@ sub git_parse_changes {
 				$mode=$detail->{'mode_to'};
 			}
 			elsif ($detail->{'status'} =~ /^[AM]+\d*$/) {
-				$action="add";
+				$action= $reverted ? "remove" : "add";
 				$mode=$detail->{'mode_to'};
 			}
 			elsif ($detail->{'status'} =~ /^[DAM]+\d*/) {
-				$action="remove";
+				$action= $reverted ? "add" : "remove";
 				$mode=$detail->{'mode_from'};
 			}
 			else {
@@ -793,11 +810,9 @@ sub git_parse_changes {
 				eval q{use File::Temp};
 				die $@ if $@;
 				my $fh;
-				($fh, $path)=File::Temp::tempfile("XXXXXXXXXX", UNLINK => 1);
-				# Ensure we run this in the right place,
-				# see comments in rcs_receive.
-				my $cmd = ($no_chdir ? '' : "cd $config{srcdir} && ")
-					. "git show $detail->{sha1_to} > '$path'";
+				($fh, $path)=File::Temp::tempfile(undef, UNLINK => 1);
+				my $cmd = "cd $git_dir && ".
+				          "git show $detail->{sha1_to} > '$path'";
 				if (system($cmd) != 0) {
 					error("failed writing temp file '$path'.");
 				}
@@ -827,10 +842,12 @@ sub rcs_receive () {
 
 		# Avoid chdir when running git here, because the changes
 		# are in the master git repo, not the srcdir repo.
+		# (Also, if a subdir is involved, we don't want to chdir to
+		# it and only see changes in it.)
 		# The pre-receive hook already puts us in the right place.
-		$no_chdir=1;
-		push @rets, git_parse_changes(git_commit_info($oldrev."..".$newrev));
-		$no_chdir=0;
+		$git_dir=".";
+		push @rets, git_parse_changes(0, git_commit_info($oldrev."..".$newrev));
+		$git_dir=undef;
 	}
 
 	return reverse @rets;
@@ -838,20 +855,41 @@ sub rcs_receive () {
 
 sub rcs_preprevert ($) {
 	my $rev=shift;
+	my ($sha1) = $rev =~ /^($sha1_pattern)$/; # untaint
+
+	# Examine changes from root of git repo, not from any subdir,
+	# in order to see all changes.
+	my ($subdir, $rootdir) = git_find_root();
+	$git_dir=$rootdir;
+
+	my @commits=git_commit_info($sha1, 1);
+	if (! @commits) {
+		error "unknown commit"; # just in case
+	}
+
+	# git revert will fail on merge commits. Add a nice message.
+	if (exists $commits[0]->{parents} &&
+	    @{$commits[0]->{parents}} > 1) {
+		error gettext("you are not allowed to revert a merge");
+	}
 
-	return git_parse_changes(git_commit_info($rev, 1));
+	my @ret=git_parse_changes(1, @commits);
+
+	$git_dir=undef;
+	return @ret;
 }
 
 sub rcs_revert ($) {
 	# Try to revert the given rev; returns undef on _success_.
 	my $rev = shift;
+	my ($sha1) = $rev =~ /^($sha1_pattern)$/; # untaint
 
-	if (run_or_non('git', 'revert', '--no-commit', $rev)) {
+	if (run_or_non('git', 'revert', '--no-commit', $sha1)) {
 		return undef;
 	}
 	else {
 		run_or_die('git', 'reset', '--hard');
-		return sprintf(gettext("Failed to revert commit %s"), $rev);
+		return sprintf(gettext("Failed to revert commit %s"), $sha1);
 	}
 }