revert spam

[git.ikiwiki.info.git] / IkiWiki / Plugin / git.pm

diff --git a/IkiWiki/Plugin/git.pm b/IkiWiki/Plugin/git.pm
index 996ab6fba0f5e6076c3a793d4ec06ef57ec93b6f..bbdcbdba82aba3b4c6499245e5d8f6bc9f041285 100644 (file)
--- a/IkiWiki/Plugin/git.pm
+++ b/IkiWiki/Plugin/git.pm
@@ -5,11 +5,11 @@ use warnings;
 use strict;
 use IkiWiki;
 use Encode;
 use strict;
 use IkiWiki;
 use Encode;

+use URI::Escape q{uri_escape_utf8};

 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
 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;

 
 sub import {
        hook(type => "checkconfig", id => "git", call => \&checkconfig);
 
 sub import {
        hook(type => "checkconfig", id => "git", call => \&checkconfig);


@@ -151,11 +151,23 @@ sub genwrapper {
        }
 }
 
        }
 }
 

+my $git_dir=undef;
+my $prefix=undef;
+
+sub in_git_dir ($$) {
+       $git_dir=shift;
+       my @ret=shift->();
+       $git_dir=undef;
+       $prefix=undef;
+       return @ret;
+}
+

 sub safe_git (&@) {
 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, "-|";
 
 
        my $pid = open my $OUT, "-|";
 


@@ -164,9 +176,13 @@ sub safe_git (&@) {
        if (!$pid) {
                # In child.
                # Git commands want to be in wc.
        if (!$pid) {
                # In child.
                # Git commands want to be in wc.

-               if (! $no_chdir) {
+               if (! defined $git_dir) {

                        chdir $config{srcdir}
                        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': $!");
        }
                }
                exec @cmdline or error("Cannot exec '@cmdline': $!");
        }


@@ -183,7 +199,12 @@ sub safe_git (&@) {
 
                chomp;
 
 
                chomp;
 

-               push @lines, $_;
+               if (! defined $data_handler) {
+                       push @lines, $_;
+               }
+               else {
+                       last unless $data_handler->($_);
+               }

        }
 
        close $OUT;
        }
 
        close $OUT;


@@ -193,9 +214,9 @@ sub safe_git (&@) {
        return wantarray ? @lines : ($? == 0);
 }
 # Convenient wrappers.
        return wantarray ? @lines : ($? == 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 ($$$) {
 
 
 sub merge_past ($$$) {


@@ -292,8 +313,6 @@ sub merge_past ($$$) {
        return $conflict;
 }
 
        return $conflict;
 }
 

-{
-my $prefix;

 sub decode_git_file ($) {
        my $file=shift;
 
 sub decode_git_file ($) {
        my $file=shift;
 


@@ -315,7 +334,6 @@ sub decode_git_file ($) {
 
        return decode("utf8", $file);
 }
 
        return decode("utf8", $file);
 }

-}

 
 sub parse_diff_tree ($) {
        # Parse the raw diff tree chunk and return the info hash.
 
 sub parse_diff_tree ($) {
        # Parse the raw diff tree chunk and return the info hash.


@@ -323,8 +341,8 @@ sub parse_diff_tree ($) {
        my $dt_ref = shift;
 
        # End of stream?
        my $dt_ref = shift;
 
        # End of stream?

-       return if !defined @{ $dt_ref } ||
-                 !defined @{ $dt_ref }[0] || !length @{ $dt_ref }[0];
+       return if ! @{ $dt_ref } ||
+                 !defined $dt_ref->[0] || !length $dt_ref->[0];

 
        my %ci;
        # Header line.
 
        my %ci;
        # Header line.


@@ -451,13 +469,10 @@ sub git_sha1 (;$) {
        # Ignore error since a non-existing file might be given.
        my ($sha1) = run_or_non('git', 'rev-list', '--max-count=1', 'HEAD',
                '--', $file);
        # Ignore error since a non-existing file might be given.
        my ($sha1) = run_or_non('git', 'rev-list', '--max-count=1', 'HEAD',
                '--', $file);

-       if ($sha1) {
+       if (defined $sha1) {

                ($sha1) = $sha1 =~ m/($sha1_pattern)/; # sha1 is untainted now
        }
                ($sha1) = $sha1 =~ m/($sha1_pattern)/; # sha1 is untainted now
        }

-       else {
-               debug("Empty sha1sum for '$file'.");
-       }
-       return defined $sha1 ? $sha1 : q{};
+       return defined $sha1 ? $sha1 : '';

 }
 
 sub rcs_update () {
 }
 
 sub rcs_update () {


@@ -492,16 +507,16 @@ sub rcs_commit (@) {
                return $conflict if defined $conflict;
        }
 
                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.
 }
 
 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;
        my %params=@_;
        
        my %env=%ENV;


@@ -535,17 +550,25 @@ sub rcs_commit_staged (@) {
                # Force git to allow empty commit messages.
                # (If this version of git supports it.)
                my ($version)=`git --version` =~ /git version (.*)/;
                # Force git to allow empty commit messages.
                # (If this version of git supports it.)
                my ($version)=`git --version` =~ /git version (.*)/;

-               if ($version ge "1.5.4") {
+               if ($version ge "1.7.8") {
+                       push @opts, "--allow-empty-message", "--no-edit";
+               }
+               if ($version ge "1.7.2") {
+                       push @opts, "--allow-empty-message";
+               }
+               elsif ($version ge "1.5.4") {

                        push @opts, '--cleanup=verbatim';
                }
                else {
                        $params{message}.=".";
                }
        }
                        push @opts, '--cleanup=verbatim';
                }
                else {
                        $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});
                }
                if (length $config{gitorigin_branch}) {
                        run_or_cry('git', 'push', $config{gitorigin_branch});
                }


@@ -598,9 +621,10 @@ sub rcs_recentchanges ($) {
                my @pages;
                foreach my $detail (@{ $ci->{'details'} }) {
                        my $file = $detail->{'file'};
                my @pages;
                foreach my $detail (@{ $ci->{'details'} }) {
                        my $file = $detail->{'file'};

+                       my $efile = uri_escape_utf8($file);

 
                        my $diffurl = defined $config{'diffurl'} ? $config{'diffurl'} : "";
 
                        my $diffurl = defined $config{'diffurl'} ? $config{'diffurl'} : "";

-                       $diffurl =~ s/\[\[file\]\]/$file/go;
+                       $diffurl =~ s/\[\[file\]\]/$efile/go;

                        $diffurl =~ s/\[\[sha1_parent\]\]/$ci->{'parent'}/go;
                        $diffurl =~ s/\[\[sha1_from\]\]/$detail->{'sha1_from'}/go;
                        $diffurl =~ s/\[\[sha1_to\]\]/$detail->{'sha1_to'}/go;
                        $diffurl =~ s/\[\[sha1_parent\]\]/$ci->{'parent'}/go;
                        $diffurl =~ s/\[\[sha1_from\]\]/$detail->{'sha1_from'}/go;
                        $diffurl =~ s/\[\[sha1_to\]\]/$detail->{'sha1_to'}/go;


@@ -657,15 +681,19 @@ sub rcs_recentchanges ($) {
        return @rets;
 }
 
        return @rets;
 }
 

-sub rcs_diff ($) {
+sub rcs_diff ($;$) {

        my $rev=shift;
        my $rev=shift;

+       my $maxlines=shift;

        my ($sha1) = $rev =~ /^($sha1_pattern)$/; # untaint
        my @lines;
        my ($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;
        }
        if (wantarray) {
                return @lines;
        }


@@ -684,7 +712,7 @@ sub findtimes ($$) {
        if (! keys %time_cache) {
                my $date;
                foreach my $line (run_or_die('git', 'log',
        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;
                                '--name-only', '--relative')) {
                        if (! defined $date && $line =~ /^(\d+)$/) {
                                $date=$line;


@@ -721,14 +749,13 @@ 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.
 
 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};
        
        my $subdir="";
        my $dir=$config{srcdir};


@@ -740,15 +767,17 @@ sub git_find_root {
                }
        }
 
                }
        }
 

-       return $git_root=$subdir;
+       $ret=[$subdir, $dir];
+       return @$ret;

 }
 
 }
 
 sub git_parse_changes {
 }
 
 }
 
 sub git_parse_changes {

+       my $reverted = shift;

        my @changes = @_;
 
        my @changes = @_;
 

-       my $subdir = git_find_root();
+       my ($subdir, $rootdir) = git_find_root();

        my @rets;
        foreach my $ci (@changes) {
                foreach my $detail (@{ $ci->{'details'} }) {
        my @rets;
        foreach my $ci (@changes) {
                foreach my $detail (@{ $ci->{'details'} }) {


@@ -766,11 +795,11 @@ sub git_parse_changes {
                                $mode=$detail->{'mode_to'};
                        }
                        elsif ($detail->{'status'} =~ /^[AM]+\d*$/) {
                                $mode=$detail->{'mode_to'};
                        }
                        elsif ($detail->{'status'} =~ /^[AM]+\d*$/) {

-                               $action="add";
+                               $action= $reverted ? "remove" : "add";

                                $mode=$detail->{'mode_to'};
                        }
                        elsif ($detail->{'status'} =~ /^[DAM]+\d*/) {
                                $mode=$detail->{'mode_to'};
                        }
                        elsif ($detail->{'status'} =~ /^[DAM]+\d*/) {

-                               $action="remove";
+                               $action= $reverted ? "add" : "remove";

                                $mode=$detail->{'mode_from'};
                        }
                        else {
                                $mode=$detail->{'mode_from'};
                        }
                        else {


@@ -793,11 +822,9 @@ sub git_parse_changes {
                                eval q{use File::Temp};
                                die $@ if $@;
                                my $fh;
                                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'.");
                                }
                                if (system($cmd) != 0) {
                                        error("failed writing temp file '$path'.");
                                }


@@ -827,35 +854,52 @@ sub rcs_receive () {
 
                # Avoid chdir when running git here, because the changes
                # are in the master git repo, not the srcdir repo.
 
                # 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.
                # The pre-receive hook already puts us in the right place.

-               $no_chdir=1;
-               push @rets, git_parse_changes(git_commit_info($oldrev."..".$newrev));
-               $no_chdir=0;
+               in_git_dir(".", sub {
+                       push @rets, git_parse_changes(0, git_commit_info($oldrev."..".$newrev));
+               });

        }
 
        return reverse @rets;
 }
 
        }
 
        return reverse @rets;
 }
 

-sub rcs_preprevert (@) {
-       my %params = @_;
-       my $rev = $params{rev};
+sub rcs_preprevert ($) {
+       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, $rootdir) = git_find_root();
+       in_git_dir($rootdir, sub {
+               my @commits=git_commit_info($sha1, 1);
+       
+               if (! @commits) {
+                       error "unknown commit"; # just in case
+               }

 
 

-       # Note test_changes expects 'cgi' and 'session' parameters.
-       require IkiWiki::Receive;
-       IkiWiki::Receive::test_changes(%params, changes =>
-               [git_parse_changes(git_commit_info($rev, 1))]);
+               # 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");
+               }
+
+               git_parse_changes(1, @commits);
+       });

 }
 
 sub rcs_revert ($) {
        # Try to revert the given rev; returns undef on _success_.
 }
 
 sub rcs_revert ($) {
        # Try to revert the given rev; returns undef on _success_.

-       my $rev = $shift;
+       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 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);

        }
 }
 
        }
 }