path: root/IkiWiki/Plugin/bzr.pm

#!/usr/bin/perl
package IkiWiki::Plugin::bzr;

use warnings;
use strict;
use IkiWiki;
use Encode;
use open qw{:utf8 :std};

sub import {
    hook(type => "checkconfig", id => "bzr", call => \&checkconfig);
    hook(type => "getsetup", id => "bzr", call => \&getsetup);
    hook(type => "rcs", id => "rcs_update", call => \&rcs_update);
    hook(type => "rcs", id => "rcs_prepedit", call => \&rcs_prepedit);
    hook(type => "rcs", id => "rcs_commit", call => \&rcs_commit);
    hook(type => "rcs", id => "rcs_commit_staged", call => \&rcs_commit_staged);
    hook(type => "rcs", id => "rcs_add", call => \&rcs_add);
    hook(type => "rcs", id => "rcs_remove", call => \&rcs_remove);
    hook(type => "rcs", id => "rcs_rename", call => \&rcs_rename);
    hook(type => "rcs", id => "rcs_recentchanges", call => \&rcs_recentchanges);
    hook(type => "rcs", id => "rcs_diff", call => \&rcs_diff);
    hook(type => "rcs", id => "rcs_getctime", call => \&rcs_getctime);
    hook(type => "rcs", id => "rcs_getmtime", call => \&rcs_getmtime);
}

sub checkconfig () {
    if (defined $config{bzr_wrapper} && length $config{bzr_wrapper}) {
        push @{$config{wrappers}}, {
            wrapper => $config{bzr_wrapper},
            wrappermode => (defined $config{bzr_wrappermode} ? $config{bzr_wrappermode} : "06755"),
        };
    }
}

sub getsetup () {
    return
        plugin => {
            safe => 0, # rcs plugin
            rebuild => undef,
            section => "rcs",
        },
        bzr_wrapper => {
            type => "string",
            #example => "", # FIXME add example
            description => "bzr post-commit hook to generate",
            safe => 0, # file
            rebuild => 0,
        },
        bzr_wrappermode => {
            type => "string",
            example => '06755',
            description => "mode for bzr_wrapper (can safely be made suid)",
            safe => 0,
            rebuild => 0,
        },
        historyurl => {
            type => "string",
            #example => "", # FIXME add example
            description => "url to show file history, using loggerhead ([[file]] substituted)",
            safe => 1,
            rebuild => 1,
        },
        diffurl => {
            type => "string",
            example => "http://example.com/revision?start_revid=[[r2]]#[[file]]-s",
            description => "url to view a diff, using loggerhead ([[file]] and [[r2]] substituted)",
            safe => 1,
            rebuild => 1,
        },
}

sub bzr_log ($) {
    my $out = shift;
    my @infos = ();
    my $key = undef;

    my %info;
    while (<$out>) {
        my $line = $_;
        my ($value);
        if ($line =~ /^message:/) {
            $key = "message";
            $info{$key} = "";
        }
        elsif ($line =~ /^(modified|added|renamed|renamed and modified|removed):/) {
            $key = "files";
            $info{$key} = "" unless defined $info{$key};
        }
        elsif (defined($key) and $line =~ /^  (.*)/) {
            $info{$key} .= "$1\n";
        }
        elsif ($line eq "------------------------------------------------------------\n") {
            push @infos, {%info} if keys %info;
            %info = ();
            $key = undef;
        }
        elsif ($line =~ /: /) {
            chomp $line;
            if ($line =~ /^revno: (\d+)/) {
                $key = "revno";
                $value = $1;
            }
            else {
                ($key, $value) = split /: +/, $line, 2;
            }
            $info{$key} = $value;
        }
    }
    close $out;
    push @infos, {%info} if keys %info;

    return @infos;
}

sub rcs_update () {
    my @cmdline = ("bzr", "update", "--quiet", $config{srcdir});
    if (system(@cmdline) != 0) {
        warn "'@cmdline' failed: $!";
    }
}

sub rcs_prepedit ($) {
    return "";
}

sub bzr_author ($) {
    my $session=shift;

    return unless defined $session;

    my $user=$session->param("name");
    my $ipaddr=$session->remote_addr();

    if (defined $user) {
        return IkiWiki::possibly_foolish_untaint($user);
    }
    elsif (defined $ipaddr) {
        return "Anonymous from ".IkiWiki::possibly_foolish_untaint($ipaddr);
    }
    else {
        return "Anonymous";
    }
}

sub rcs_commit (@) {
    my %params=@_;

    my $user=bzr_author($params{session});

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

    my @cmdline = ("bzr", "commit", "--quiet", "-m", $params{message},
                   (defined $user ? ("--author", $user) : ()),
                   $config{srcdir}."/".$params{file});
    if (system(@cmdline) != 0) {
        warn "'@cmdline' failed: $!";
    }

    return undef; # success
}

sub rcs_commit_staged (@) {
    my %params=@_;

    my $user=bzr_author($params{session});

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

    my @cmdline = ("bzr", "commit", "--quiet", "-m", $params{message},
                   (defined $user ? ("--author", $user) : ()),
                   $config{srcdir});
    if (system(@cmdline) != 0) {
        warn "'@cmdline' failed: $!";
    }

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

    my @cmdline = ("bzr", "rm", "--force", "--quiet", "$config{srcdir}/$file");
    if (system(@cmdline) != 0) {
        warn "'@cmdline' failed: $!";
    }
}

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

    my $parent = IkiWiki::dirname($dest);
    if (system("bzr", "add", "--quiet", "$config{srcdir}/$parent") != 0) {
        warn("bzr add $parent failed\n");
    }

    my @cmdline = ("bzr", "mv", "--quiet", "$config{srcdir}/$src", "$config{srcdir}/$dest");
    if (system(@cmdline) != 0) {
        warn "'@cmdline' failed: $!";
    }
}

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

    my @cmdline = ("bzr", "log", "-v", "--show-ids", "--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->{message})) {
            push @message, { line => $msgline };
        }

        foreach my $file (split(/\n/, $info->{files})) {
            my ($filename, $fileid) = ($file =~ /^(.*?) +([^ ]+)$/);

            # Skip directories
            next if ($filename =~ /\/$/);

            # Skip source name in renames
            $filename =~ s/^.* => //;

            my $diffurl = defined $config{'diffurl'} ? $config{'diffurl'} : "";
            $diffurl =~ s/\[\[file\]\]/$filename/go;
            $diffurl =~ s/\[\[file-id\]\]/$fileid/go;
            $diffurl =~ s/\[\[r2\]\]/$info->{revno}/go;

            push @pages, {
                page => pagename($filename),
                diffurl => $diffurl,
            };
        }

        my $user = $info->{"committer"};
        if (defined($info->{"author"})) { $user = $info->{"author"}; }
        $user =~ s/\s*<.*>\s*$//;
        $user =~ s/^\s*//;

        push @ret, {
            rev        => $info->{"revno"},
            user       => $user,
            committype => "bzr",
            when       => str2time($info->{"timestamp"}),
            message    => [@message],
            pages      => [@pages],
        };
    }

    return @ret;
}

sub rcs_diff ($;$) {
    my $taintedrev=shift;
    my $maxlines=shift;
    my ($rev) = $taintedrev =~ /^(\d+(\.\d+)*)$/; # untaint

    my $prevspec = "before:" . $rev;
    my $revspec = "revno:" . $rev;
    my @cmdline = ("bzr", "diff", "--old", $config{srcdir},
        "--new", $config{srcdir},
        "-r", $prevspec . ".." . $revspec);
    open (my $out, "@cmdline |");
    my @lines;
    while (my $line=<$out>) {
        last if defined $maxlines && @lines == $maxlines;
        push @lines, $line;
    }
    if (wantarray) {
        return @lines;
    }
    else {
        return join("", @lines);
    }
}

sub extract_timestamp (@) {
    open (my $out, "-|", @_);
    my @log = bzr_log($out);

    if (length @log < 1) {
        return 0;
    }

    eval q{use Date::Parse};
    error($@) if $@;
    
    my $time = str2time($log[0]->{"timestamp"});
    return $time;
}

sub rcs_getctime ($) {
    my ($file) = @_;

    my @cmdline = ("bzr", "log", "--forward", "--limit", '1', "$config{srcdir}/$file");
    return extract_timestamp(@cmdline);
}

sub rcs_getmtime ($) {
    my ($file) = @_;

    my @cmdline = ("bzr", "log", "--limit", '1', "$config{srcdir}/$file");
    return extract_timestamp(@cmdline);
}

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