path: root/IkiWiki/Rcs/svn.pm

#!/usr/bin/perl
# For subversion support.

use warnings;
use strict;
use IkiWiki;
use POSIX qw(setlocale LC_CTYPE);

package IkiWiki;
        
my $svn_webcommit=qr/^web commit (by (\w+)|from (\d+\.\d+\.\d+\.\d+)):?(.*)/;

# svn needs LC_CTYPE set to a UTF-8 locale, so try to find one. Any will do.
sub find_lc_ctype() {
    my $current = setlocale(LC_CTYPE());
    return $current if $current =~ m/UTF-?8$/i;

    # Make some obvious attempts to avoid calling `locale -a`
    foreach my $locale ("$current.UTF-8", "en_US.UTF-8", "en_GB.UTF-8") {
        return $locale if setlocale(LC_CTYPE(), $locale);
    }

    # Try to get all available locales and pick the first UTF-8 one found.
    if (my @locale = grep(/UTF-?8$/i, `locale -a`)) {
        chomp @locale;
        return $locale[0] if setlocale(LC_CTYPE(), $locale[0]);
    }

    # fallback to the current locale
    return $current;
} # }}}
$ENV{LC_CTYPE} = $ENV{LC_CTYPE} || find_lc_ctype();

sub svn_info ($$) { #{{{
    my $field=shift;
    my $file=shift;

    my $info=`LANG=C svn info $file`;
    my ($ret)=$info=~/^$field: (.*)$/m;
    return $ret;
} #}}}

sub rcs_update () { #{{{
    if (-d "$config{srcdir}/.svn") {
        if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
            warn("svn update failed\n");
        }
    }
} #}}}

sub rcs_prepedit ($) { #{{{
    # Prepares to edit a file under revision control. Returns a token
    # that must be passed into rcs_commit when the file is ready
    # for committing.
    # The file is relative to the srcdir.
    my $file=shift;
    
    if (-d "$config{srcdir}/.svn") {
        # For subversion, return the revision of the file when
        # editing begins.
        my $rev=svn_info("Revision", "$config{srcdir}/$file");
        return defined $rev ? $rev : "";
    }
} #}}}

sub rcs_commit ($$$) { #{{{
    # Tries to commit the page; returns undef on _success_ and
    # a version of the page with the rcs's conflict markers on failure.
    # The file is relative to the srcdir.
    my $file=shift;
    my $message=shift;
    my $rcstoken=shift;

    if (-d "$config{srcdir}/.svn") {
        # Check to see if the page has been changed by someone
        # else since rcs_prepedit was called.
        my ($oldrev)=$rcstoken=~/^([0-9]+)$/; # untaint
        my $rev=svn_info("Revision", "$config{srcdir}/$file");
        if (defined $rev && defined $oldrev && $rev != $oldrev) {
            # Merge their changes into the file that we've
            # changed.
            chdir($config{srcdir}); # svn merge wants to be here
            if (system("svn", "merge", "--quiet", "-r$oldrev:$rev",
                       "$config{srcdir}/$file") != 0) {
                warn("svn merge -r$oldrev:$rev failed\n");
            }
        }

        if (system("svn", "commit", "--quiet", 
                   "--encoding", "UTF-8", "-m",
                   possibly_foolish_untaint($message),
               "$config{srcdir}") != 0) {
            my $conflict=readfile("$config{srcdir}/$file");
            if (system("svn", "revert", "--quiet", "$config{srcdir}/$file") != 0) {
                warn("svn revert failed\n");
            }
            return $conflict;
        }
    }
    return undef # success
} #}}}

sub rcs_add ($) { #{{{
    # filename is relative to the root of the srcdir
    my $file=shift;

    if (-d "$config{srcdir}/.svn") {
        my $parent=dirname($file);
        while (! -d "$config{srcdir}/$parent/.svn") {
            $file=$parent;
            $parent=dirname($file);
        }
        
        if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
            warn("svn add failed\n");
        }
    }
} #}}}

sub rcs_recentchanges ($) { #{{{
    my $num=shift;
    my @ret;
    
    return unless -d "$config{srcdir}/.svn";

    eval q{use CGI 'escapeHTML'};
    eval q{use Date::Parse};
    eval q{use Time::Duration};
    eval q{use XML::SAX};
    eval q{use XML::Simple};

    # avoid using XML::SAX::PurePerl, it's buggy with UTF-8 data
    my @parsers = map { ${$_}{Name} } @{XML::SAX->parsers()};
    do {
        $XML::Simple::PREFERRED_PARSER = pop @parsers;
    } until $XML::Simple::PREFERRED_PARSER ne 'XML::SAX::PurePerl';

    # --limit is only supported on Subversion 1.2.0+
    my $svn_version=`svn --version -q`;
    my $svn_limit='';
    $svn_limit="--limit $num"
        if $svn_version =~ /\d\.(\d)\.\d/ && $1 >= 2;

    my $svn_url=svn_info("URL", $config{srcdir});
    my $xml = XMLin(scalar `svn $svn_limit --xml -v log '$svn_url'`,
        ForceArray => [ 'logentry', 'path' ],
        GroupTags => { paths => 'path' },
        KeyAttr => { path => 'content' },
    );
    foreach my $logentry (@{$xml->{logentry}}) {
        my (@pages, @message);

        my $rev = $logentry->{revision};
        my $user = $logentry->{author};

        my $date = $logentry->{date};
        $date =~ s/T/ /;
        $date =~ s/\.\d+Z$//;
        my $when=concise(ago(time - str2time($date, 'UTC')));

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

        my $committype="web";
        if (defined $message[0] &&
            $message[0]->{line}=~/$svn_webcommit/) {
            $user=defined $2 ? "$2" : "$3";
            $message[0]->{line}=$4;
        }
        else {
            $committype="svn";
        }

        foreach (keys %{$logentry->{paths}}) {
            next unless /^\/\Q$config{svnpath}\E\/([^ ]+)(?:$|\s)/;
            my $file=$1;
            my $diffurl=$config{diffurl};
            $diffurl=~s/\[\[file\]\]/$file/g;
            $diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
            $diffurl=~s/\[\[r2\]\]/$rev/g;
            push @pages, {
                link => htmllink("", "", pagename($file), 1),
                diffurl => $diffurl,
            } if length $file;
        }
        push @ret, { rev => $rev,
            user => htmllink("", "", $user, 1),
            committype => $committype,
            when => $when,
            message => [@message],
            pages => [@pages],
        } if @pages;
        return @ret if @ret >= $num;
    }

    return @ret;
} #}}}

sub rcs_notify () { #{{{
    if (! exists $ENV{REV}) {
        error("REV is not set, not running from svn post-commit hook, cannot send notifications");
    }
    my $rev=int(possibly_foolish_untaint($ENV{REV}));
    
    my $user=`svnlook author $config{svnrepo} -r $rev`;
    chomp $user;
    my $message=`svnlook log $config{svnrepo} -r $rev`;
    if ($message=~/$svn_webcommit/) {
        $user=defined $2 ? "$2" : "$3";
        $message=$4;
    }

    my @changed_pages;
    foreach my $change (`svnlook changed $config{svnrepo} -r $rev`) {
        chomp $change;
        if ($change =~ /^[A-Z]+\s+\Q$config{svnpath}\E\/(.*)/) {
            push @changed_pages, $1;
        }
    }
        
    require IkiWiki::UserInfo;
    my @email_recipients=commit_notify_list($user, @changed_pages);
    if (@email_recipients) {
        # TODO: if a commit spans multiple pages, this will send
        # subscribers a diff that might contain pages they did not
        # sign up for. Should separate the diff per page and
        # reassemble into one mail with just the pages subscribed to.
        my $diff=`svnlook diff $config{svnrepo} -r $rev --no-diff-deleted`;

        my $subject="$config{wikiname} update of ";
        if (@changed_pages > 2) {
            $subject.="$changed_pages[0] $changed_pages[1] etc";
        }
        else {
            $subject.=join(" ", @changed_pages);
        }
        $subject.=" by $user";

        my $template=template("notifymail.tmpl");
        $template->param(
            wikiname => $config{wikiname},
            diff => $diff,
            user => $user,
            message => $message,
        );
        
        eval q{use Mail::Sendmail};
        foreach my $email (@email_recipients) {
            sendmail(
                To => $email,
                From => "$config{wikiname} <$config{adminemail}>",
                Subject => $subject,
                Message => $template->output,
            ) or error("Failed to send update notification mail");
        }
    }
} #}}}

sub rcs_getctime ($) { #{{{
    my $file=shift;
    eval q{use Date::Parse};

    my $svn_log_infoline=qr/^r\d+\s+\|\s+[^\s]+\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
        
    my $child = open(SVNLOG, "-|");
    if (! $child) {
        exec("svn", "log", $file) || error("svn log $file failed to run");
    }

    my $date;
    while (<SVNLOG>) {
        if (/$svn_log_infoline/) {
            $date=$1;
            }
    }
    close SVNLOG || warn "svn log $file exited $?";

    if (! defined $date) {
        warn "failed to parse svn log for $file\n";
        return 0;
    }
        
    $date=str2time($date);
    debug("found ctime ".localtime($date)." for $file");
    return $date;
} #}}}

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