path: root/IkiWiki/Receive.pm

#!/usr/bin/perl

package IkiWiki::Receive;

use warnings;
use strict;
use IkiWiki;

sub getuser () { #{{{
    my $user=(getpwuid($<))[0];
    if (! defined $user) {
        error("cannot determine username for $<");
    }
    return $user;
} #}}}

sub trusted () { #{{{
    my $user=getuser();
    return ! ref $config{untrusted_committers} ||
        ! grep { $_ eq $user } @{$config{untrusted_committers}};
} #}}}

sub test () { #{{{
    exit 0 if trusted();
    
    # Dummy up a cgi environment to use when calling check_canedit
    # and friends.
    eval q{use CGI};
    error($@) if $@;
    my $cgi=CGI->new;
    require IkiWiki::CGI;
    my $session=IkiWiki::cgi_getsession($cgi);
    $session->param("name", getuser());
    $ENV{REMOTE_ADDR}='unknown' unless exists $ENV{REMOTE_ADDR};

    # Wiki is not locked because we lack permission to do so.
    # So, relying on atomic index file updates to avoid trouble.
    IkiWiki::loadindex();

    my %newfiles;

    foreach my $change (IkiWiki::rcs_receive()) {
        # This untaint is safe because we check file_pruned and
        # wiki_file_regexp.
        my ($file)=$change->{file}=~/$config{wiki_file_regexp}/;
        $file=IkiWiki::possibly_foolish_untaint($file);
        if (! defined $file || ! length $file ||
            IkiWiki::file_pruned($file, $config{srcdir})) {
            error(gettext("bad file name %s"), $file);
        }

        my $type=pagetype($file);
        my $page=pagename($file) if defined $type;
        
        if ($change->{action} eq 'add') {
            $newfiles{$file}=1;
        }

        if ($change->{action} eq 'change' ||
            $change->{action} eq 'add') {
            if (defined $page) {
                if (IkiWiki->can("check_canedit")) {
                    IkiWiki::check_canedit($page, $cgi, $session);
                    next;
                }
            }
            else {
                if (IkiWiki::Plugin::attachment->can("check_canattach")) {
                    IkiWiki::Plugin::attachment::check_canattach($session, $file, $change->{path});
                    next;
                }
            }
        }
        elsif ($change->{action} eq 'remove') {
            # check_canremove tests to see if the file is present
            # on disk. This will fail is a single commit adds a
            # file and then removes it again. Avoid the problem
            # by not testing the removal in such pairs of changes.
            # (The add is still tested, just to make sure that
            # no data is added to the repo that a web edit
            # could add.)
            next if $newfiles{$file};

            if (IkiWiki::Plugin::remove->can("check_canremove")) {
                IkiWiki::Plugin::remove::check_canremove(defined $page ? $page : $file, $cgi, $session);
                next;
            }
        }
        else {
            error "unknown action ".$change->{action};
        }
        
        error sprintf(gettext("you are not allowed to change %s"), $file);
    }

    exit 0;
} #}}}

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