mercurial: Implement rcs_diff. (Daniel Andersson)

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

diff --git a/IkiWiki/Plugin/mercurial.pm b/IkiWiki/Plugin/mercurial.pm
index 1793ab4bb3f01d0abc22c4b70128b51fa3d6aa5c..102b4692b805024ec02dc78a7db09896436e3d2b 100644 (file)
--- a/IkiWiki/Plugin/mercurial.pm
+++ b/IkiWiki/Plugin/mercurial.pm
@@ -69,6 +69,50 @@ sub getsetup () {
                },
 }
 
                },
 }
 

+sub safe_hg (&@) {
+       # 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, $data_handler, @cmdline) = @_;
+
+       my $pid = open my $OUT, "-|";
+
+       error("Cannot fork: $!") if !defined $pid;
+
+       if (!$pid) {
+               # In child.
+               # hg commands want to be in wc.
+               chdir $config{srcdir}
+                   or error("cannot chdir to $config{srcdir}: $!");
+
+               exec @cmdline or error("Cannot exec '@cmdline': $!");
+       }
+       # In parent.
+
+       my @lines;
+       while (<$OUT>) {
+               chomp;
+
+               if (! defined $data_handler) {
+                       push @lines, $_;
+               }
+               else {
+                       last unless $data_handler->($_);
+               }
+       }
+
+       close $OUT;
+
+       $error_handler->("'@cmdline' failed: $!") if $? && $error_handler;
+
+       return wantarray ? @lines : ($? == 0);
+}
+# Convenient wrappers.
+sub run_or_die ($@) { safe_hg(\&error, undef, @_) }
+sub run_or_cry ($@) { safe_hg(sub { warn @_ }, undef, @_) }
+sub run_or_non ($@) { safe_hg(undef, undef, @_) }
+

 sub mercurial_log ($) {
        my $out = shift;
        my @infos;
 sub mercurial_log ($) {
        my $out = shift;
        my @infos;


@@ -116,75 +160,93 @@ sub mercurial_log ($) {
 }
 
 sub rcs_update () {
 }
 
 sub rcs_update () {

-       my @cmdline = ("hg", "-q", "-R", "$config{srcdir}", "update");
-       if (system(@cmdline) != 0) {
-               warn "'@cmdline' failed: $!";
-       }
+       run_or_cry('hg', '-q', 'update');

 }
 
 sub rcs_prepedit ($) {
        return "";
 }
 
 }
 
 sub rcs_prepedit ($) {
        return "";
 }
 

-sub rcs_commit ($$$;$$$) {
-       my ($file, $message, $rcstoken, $user, $ipaddr, $emailuser) = @_;
+sub rcs_commit (@) {
+       my %params=@_;

 
 

-       if (defined $user) {
-               $user = IkiWiki::possibly_foolish_untaint($user);
-       }
-       elsif (defined $ipaddr) {
-               $user = "Anonymous from ".IkiWiki::possibly_foolish_untaint($ipaddr);
-       }
-       else {
-               $user = "Anonymous";
+       return rcs_commit_helper(@_);
+}
+
+sub rcs_commit_helper (@) {
+       my %params=@_;
+
+       my %env=%ENV;
+       $ENV{HGENCODING} = 'utf-8';
+
+       my $user="Anonymous";
+       my $nickname;
+       if (defined $params{session}) {
+               if (defined $params{session}->param("name")) {
+                       $user = $params{session}->param("name");
+               }
+               elsif (defined $params{session}->remote_addr()) {
+                       $user = $params{session}->remote_addr();
+               }
+
+               if (defined $params{session}->param("nickname")) {
+                       $nickname=encode_utf8($params{session}->param("nickname"));
+                       $nickname=~s/\s+/_/g;
+                       $nickname=~s/[^-_0-9[:alnum:]]+//g;
+               }
+               $ENV{HGUSER} = encode_utf8($user . ' <' . $nickname . '@web>');

        }
 
        }
 

-       $message = IkiWiki::possibly_foolish_untaint($message);
-       if (! length $message) {
-               $message = "no message given";
+       if (! length $params{message}) {
+               $params{message} = "no message given";

        }
 
        }
 

-       my @cmdline = ("hg", "-q", "-R", $config{srcdir}, "commit", 
-                      "-m", $message, "-u", $user);
-       if (system(@cmdline) != 0) {
-               warn "'@cmdline' failed: $!";
+       $params{message} = IkiWiki::possibly_foolish_untaint($params{message});
+
+       my @opts;
+
+       if (exists $params{file}) {
+               push @opts, '--', $params{file};

        }
        }

+       # hg commit returns non-zero if nothing really changed.
+       # So we should ignore its exit status (hence run_or_non).
+       run_or_non('hg', 'commit', '-m', $params{message}, '-q', @opts);

 
 

+       %ENV=%env;

        return undef; # success
 }
 
        return undef; # success
 }
 

-sub rcs_commit_staged ($$$;$) {
+sub rcs_commit_staged (@) {

        # Commits all staged changes. Changes can be staged using rcs_add,
        # rcs_remove, and rcs_rename.
        # Commits all staged changes. Changes can be staged using rcs_add,
        # rcs_remove, and rcs_rename.

-       my ($message, $user, $ipaddr, $emailuser)=@_;
-       
-       error("rcs_commit_staged not implemented for mercurial"); # TODO
+       return rcs_commit_helper(@_);

 }
 
 sub rcs_add ($) {
        my ($file) = @_;
 
 }
 
 sub rcs_add ($) {
        my ($file) = @_;
 

-       my @cmdline = ("hg", "-q", "-R", "$config{srcdir}", "add", "$config{srcdir}/$file");
-       if (system(@cmdline) != 0) {
-               warn "'@cmdline' failed: $!";
-       }
+       run_or_cry('hg', 'add', $file);

 }
 
 sub rcs_remove ($) {
 }
 
 sub rcs_remove ($) {

+       # Remove file from archive.

        my ($file) = @_;
 
        my ($file) = @_;
 

-       error("rcs_remove not implemented for mercurial"); # TODO
+       run_or_cry('hg', 'remove', '-f', $file);

 }
 
 sub rcs_rename ($$) {
        my ($src, $dest) = @_;
 
 }
 
 sub rcs_rename ($$) {
        my ($src, $dest) = @_;
 

-       error("rcs_rename not implemented for mercurial"); # TODO
+       run_or_cry('hg', 'rename', '-f', $src, $dest);

 }
 
 sub rcs_recentchanges ($) {
        my ($num) = @_;
 
 }
 
 sub rcs_recentchanges ($) {
        my ($num) = @_;
 

+       my %env=%ENV;
+       $ENV{HGENCODING} = 'utf-8';
+

        my @cmdline = ("hg", "-R", $config{srcdir}, "log", "-v", "-l", $num,
                "--style", "default");
        open (my $out, "@cmdline |");
        my @cmdline = ("hg", "-R", $config{srcdir}, "log", "-v", "-l", $num,
                "--style", "default");
        open (my $out, "@cmdline |");


@@ -196,7 +258,7 @@ sub rcs_recentchanges ($) {
        foreach my $info (mercurial_log($out)) {
                my @pages = ();
                my @message = ();
        foreach my $info (mercurial_log($out)) {
                my @pages = ();
                my @message = ();

-        
+

                foreach my $msgline (split(/\n/, $info->{description})) {
                        push @message, { line => $msgline };
                }
                foreach my $msgline (split(/\n/, $info->{description})) {
                        push @message, { line => $msgline };
                }


@@ -212,49 +274,132 @@ sub rcs_recentchanges ($) {
                        };
                }
 
                        };
                }
 

+               #"user <email@domain.net>": parse out "user".

                my $user = $info->{"user"};
                $user =~ s/\s*<.*>\s*$//;
                $user =~ s/^\s*//;
 
                my $user = $info->{"user"};
                $user =~ s/\s*<.*>\s*$//;
                $user =~ s/^\s*//;
 

+               #"user <nickname@web>": if "@web" hits, set $web_commit=true.
+               my $web_commit = ($info->{'user'} =~ /\@web>/);
+
+               #"user <nickname@web>": if user is a URL (hits "://") and "@web"
+               #was present, parse out nick.
+               my $nickname;
+               if ($user =~ /:\/\// && $web_commit) {
+                       $nickname = $info->{'user'};
+                       $nickname =~ s/^[^<]*<([^\@]+)\@web>\s*$/$1/;
+               }
+

                push @ret, {
                        rev        => $info->{"changeset"},
                        user       => $user,
                push @ret, {
                        rev        => $info->{"changeset"},
                        user       => $user,

-                       committype => "hg",
+                       nickname   => $nickname,
+                       committype => $web_commit ? "web" : "hg",

                        when       => str2time($info->{"date"}),
                        message    => [@message],
                        pages      => [@pages],
                };
        }
 
                        when       => str2time($info->{"date"}),
                        message    => [@message],
                        pages      => [@pages],
                };
        }
 

+       %ENV=%env;
+

        return @ret;
 }
 
        return @ret;
 }
 

-sub rcs_diff ($) {
-       # TODO
+sub rcs_diff ($;$) {
+       my $rev=shift;
+       my $maxlines=shift;
+       my @lines;
+       my $addlines=sub {
+               my $line=shift;
+               return if defined $maxlines && @lines == $maxlines;
+               push @lines, $line."\n"
+                       if (@lines || $line=~/^diff --git/);
+               return 1;
+       };
+       safe_hg(undef, $addlines, "hg", "diff", "-c", $rev, "-g");
+       if (wantarray) {
+               return @lines;
+       }
+       else {
+               return join("", @lines);
+       }

 }
 
 }
 

-sub rcs_getctime ($) {
-       my ($file) = @_;
+{
+my %time_cache;
+
+sub findtimes ($$) {
+       my $file=shift;
+       my $id=shift; # 0 = mtime ; 1 = ctime
+
+       if (! keys %time_cache) {
+               my $date;
+
+               # It doesn't seem possible to specify the format wanted for the
+               # changelog (same format as is generated in git.pm:findtimes(),
+               # though the date differs slightly) without using a style
+               # _file_. There is a "hg log" switch "--template" to directly
+               # control simple output formatting, but in this case, the
+               # {file} directive must be redefined, which can only be done
+               # with "--style".
+               #
+               # If {file} is not redefined, all files are output on a single
+               # line separated with a space. It is not possible to conclude
+               # if the space is part of a filename or just a separator, and
+               # thus impossible to use in this case.
+               # 
+               # Some output filters are available in hg, but they are not fit
+               # for this cause (and would slow down the process
+               # unnecessarily).
+               
+               eval q{use File::Temp};
+               error $@ if $@;
+               my ($tmpl_fh, $tmpl_filename) = File::Temp::tempfile(UNLINK => 1);
+               
+               print $tmpl_fh 'changeset = "{date}\\n{files}\\n"' . "\n";
+               print $tmpl_fh 'file = "{file}\\n"' . "\n";
+               
+               foreach my $line (run_or_die('hg', 'log', '--style', $tmpl_filename)) {
+                       # {date} gives output on the form
+                       # 1310694511.0-7200
+                       # where the first number is UTC Unix timestamp with one
+                       # decimal (decimal always 0, at least on my system)
+                       # followed by local timezone offset from UTC in
+                       # seconds.
+                       if (! defined $date && $line =~ /^\d+\.\d[+-]\d*$/) {
+                               $line =~ s/^(\d+).*/$1/;
+                               $date=$line;
+                       }
+                       elsif (! length $line) {
+                               $date=undef;
+                       }
+                       else {
+                               my $f=$line;
+
+                               if (! $time_cache{$f}) {
+                                       $time_cache{$f}[0]=$date; # mtime
+                               }
+                               $time_cache{$f}[1]=$date; # ctime
+                       }
+               }
+       }

 
 

-       my @cmdline = ("hg", "-R", $config{srcdir}, "log", "-v",
-               "--style", "default", $file);
-       open (my $out, "-|", @cmdline);
+       return exists $time_cache{$file} ? $time_cache{$file}[$id] : 0;
+}

 
 

-       my @log = (mercurial_log($out));
+}

 
 

-       if (@log < 1) {
-               return 0;
-       }
+sub rcs_getctime ($) {
+       my $file = shift;

 
 

-       eval q{use Date::Parse};
-       error($@) if $@;
-       
-       my $ctime = str2time($log[$#log]->{"date"});
-       return $ctime;
+       return findtimes($file, 1);

 }
 
 sub rcs_getmtime ($) {
 }
 
 sub rcs_getmtime ($) {

-       error "rcs_getmtime is not implemented for mercurial\n"; # TODO
+       my $file = shift;
+
+       return findtimes($file, 0);

 }
 
 1
 }
 
 1