This is mostly based on the Mercurial plugin (in fact, apart from the commands
being run, only the name of the rcs was changed in rcs_recentchanges, and
rcs_commit was only changed to work around bzr's lack of a switch to set the
username). bzr_log could probably be written better by someone better at perl,
and rcs_getctime and rcs_notify aren't written at all. --[[bma]]

    #!/usr/bin/perl
    
    use warnings;
    use strict;
    use IkiWiki;
    use Encode;
    use open qw{:utf8 :std};
    
    package IkiWiki;
    
    sub bzr_log($) {
            my $out = shift;
    
            my @lines = <$out>;
    
            my @entries = split(/\n-+\s/,join("", @lines));
    
            my @ret = ();
    
            foreach my $entry (@entries) {
    
                    my ($initial,$i) = split(/message:/,$entry,2);
                    my ($message, $j, $files) = split(/(added|modified|removed):/,$i,3);
                    $message =~ s/\n/\\n/g;
                    $files =~ s/\n//g;
                    $entry = $initial . "\ndescription: " . $message . "\nfiles: " . $files;
    
                    my @lines = split(/\n/,$entry);
                    shift(@lines);
    
                    my %entry;
                    foreach (@lines) {
                            my ($key,$value) = split(/: /);
                            $entry{$key} = $value;
                    }
                    $entry{description}=~s/\\n/\n/g;
                    $entry{files}=~s/\s\s+/\ /g;
                    $entry{files}=~s/^\s+//g;
    
                    $ret[@ret] = {
                            "description" =>  $entry{description},
                            "user" => $entry{committer},
                            "files" => $entry{files},
                            "date" => $entry{timestamp},
                    }
            }
    
            return @ret;
    }
    
    sub rcs_update () { #{{{
            # Not needed.
    } #}}}
    
    sub rcs_prepedit ($) { #{{{
            return "";
    } #}}}
    
    sub rcs_commit ($$$;$$) { #{{{
            my ($file, $message, $rcstoken, $user, $ipaddr) = @_;
    
            if (defined $user) {
                    $user = possibly_foolish_untaint($user);
            }
            elsif (defined $ipaddr) {
                    $user = "Anonymous from ".possibly_foolish_untaint($ipaddr);
            }
            else {
                    $user = "Anonymous";
            }
    
            $message = possibly_foolish_untaint($message);
            if (! length $message) {
                    $message = "no message given";
            }
    
            my $olduser = `bzr whoami`;
            chomp $olduser;
            system("bzr","whoami",$user); # This will set the branch username; there doesn't seem to be a way to do it on a per-commit basis.
                                          # Save the old one and restore after the commit.
            my @cmdline = ("bzr", "commit", "-m", $message, $config{srcdir}."/".$file);
            if (system(@cmdline) != 0) {
                    warn "'@cmdline' failed: $!";
            }
    
            $olduser=possibly_foolish_untaint($olduser);
            system("bzr","whoami",$olduser);
    
            return undef; # success
    } #}}}
    
    sub rcs_add ($) { # {{{
            my ($file) = @_;
    
            my @cmdline = ("bzr", "add", "--quiet", "$config{srcdir}/$file");
            if (system(@cmdline) != 0) {
                    warn "'@cmdline' failed: $!";
            }
    } #}}}
    
    sub rcs_recentchanges ($) { #{{{
            my ($num) = @_;
    
            eval q{use CGI 'escapeHTML'};
            error($@) if $@;
    
            my @cmdline = ("bzr", "log", "--long", "--verbose", "--limit", $num,$config{srcdir});
            open (my $out, "@cmdline |");
    
            eval q{use Date::Parse};
            error($@) if $@;
    
            my @ret;
            foreach my $info (bzr_log($out)) {
                    my @pages = ();
                    my @message = ();
    
                    foreach my $msgline (split(/\n/, $info->{description})) {
                            push @message, { line => $msgline };
                    }
    
                    foreach my $file (split / /,$info->{files}) {
                            my $diffurl = $config{'diffurl'};
                            $diffurl =~ s/\[\[file\]\]/$file/go;
                            $diffurl =~ s/\[\[r2\]\]/$info->{changeset}/go;
    
                            push @pages, {
                                    page => pagename($file),
                                    diffurl => $diffurl,
                            };
                    }
    
                    my $user = $info->{"user"};
                    $user =~ s/\s*<.*>\s*$//;
                    $user =~ s/^\s*//;
    
                    push @ret, {
                            rev        => $info->{"changeset"},
                            user       => $user,
                            committype => "bzr",
                            when       => time - str2time($info->{"date"}),
                            message    => [@message],
                            pages      => [@pages],
                    };
            }
    
            return @ret;
    } #}}}
    
    sub rcs_notify () { #{{{
            # TODO
    } #}}}
    
    sub rcs_getctime ($) { #{{{
            # TODO
    } #}}}
    
    1


[[patch]]


> Thanks for doing this.
> bzr 0.90 has support for --author to commit to set the author for one commit at a time,
> you might like to use that instead of changing the global username (which is racy).
>
> Wouter van Heyst and I were also working on a plugin for bzr, but we were waiting for
> the smart server to grow the ability to run server side hooks, so that you can edit locally
> and then push to rebuild the wiki, but there is no need to stop this going in in the mean
> time.
> Thanks again --[[JamesWestby]]

>> I didn't know about --author, it doesn't seem to be mentioned in the manual.
>> I'd update the patch to reflect this, but it breaks with the version of bzr
>> from Stable, and also the one I'm currently using from backports.org.

>>> It's new (in fact I'm not even sure that it made it in to 0.90, it might be in 0.91 due
>>> in a couple of weeks.
>>> I was just noting it for a future enhancement. --[[JamesWestby]]