ikiwiki/IkiWiki/Plugin/cvs.pm

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#!/usr/bin/perl
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package IkiWiki::Plugin::cvs;
# Copyright (c) 2009 Amitai Schlair
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# All rights reserved.
#
# This code is derived from software contributed to ikiwiki
# by Amitai Schlair.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY IKIWIKI AND CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION
# OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
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use warnings;
use strict;
use IkiWiki;
use URI::Escape q{uri_escape_utf8};
use File::chdir;
# GENERAL PLUGIN API CALLS
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sub import {
hook(type => "checkconfig", id => "cvs", call => \&checkconfig);
hook(type => "getsetup", id => "cvs", call => \&getsetup);
hook(type => "genwrapper", id => "cvs", call => \&genwrapper);
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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);
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}
sub checkconfig () {
if (! defined $config{cvspath}) {
$config{cvspath}="ikiwiki";
}
if (exists $config{cvspath}) {
# code depends on the path not having extraneous slashes
$config{cvspath}=~tr#/#/#s;
$config{cvspath}=~s/\/$//;
$config{cvspath}=~s/^\///;
}
if (defined $config{cvs_wrapper} && length $config{cvs_wrapper}) {
push @{$config{wrappers}}, {
wrapper => $config{cvs_wrapper},
wrappermode => (defined $config{cvs_wrappermode} ? $config{cvs_wrappermode} : "04755"),
};
}
}
sub getsetup () {
return
plugin => {
safe => 0, # rcs plugin
rebuild => undef,
section => "rcs",
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},
cvsrepo => {
type => "string",
example => "/cvs/wikirepo",
description => "cvs repository location",
safe => 0, # path
rebuild => 0,
},
cvspath => {
type => "string",
example => "ikiwiki",
description => "path inside repository where the wiki is located",
safe => 0, # paranoia
rebuild => 0,
},
cvs_wrapper => {
type => "string",
example => "/cvs/wikirepo/CVSROOT/post-commit",
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description => "cvs post-commit hook to generate (triggered by CVSROOT/loginfo entry)",
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safe => 0, # file
rebuild => 0,
},
cvs_wrappermode => {
type => "string",
example => '04755',
description => "mode for cvs_wrapper (can safely be made suid)",
safe => 0,
rebuild => 0,
},
historyurl => {
type => "string",
example => "http://cvs.example.org/cvsweb.cgi/ikiwiki/[[file]]",
description => "cvsweb url to show file history ([[file]] substituted)",
safe => 1,
rebuild => 1,
},
diffurl => {
type => "string",
example => "http://cvs.example.org/cvsweb.cgi/ikiwiki/[[file]].diff?r1=text&tr1=[[r1]]&r2=text&tr2=[[r2]]",
description => "cvsweb url to show a diff ([[file]], [[r1]], and [[r2]] substituted)",
safe => 1,
rebuild => 1,
},
}
sub genwrapper () {
return <<EOF;
{
int j;
for (j = 1; j < argc; j++)
if (strstr(argv[j], "New directory") != NULL)
exit(0);
}
EOF
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}
# VCS PLUGIN API CALLS
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sub rcs_update () {
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return unless cvs_is_controlling();
cvs_runcvs('update', '-dP');
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}
sub rcs_prepedit ($) {
# 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;
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return unless cvs_is_controlling();
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# For cvs, return the revision of the file when
# editing begins.
my $rev=cvs_info("Repository revision", "$file");
return defined $rev ? $rev : "";
}
sub rcs_commit (@) {
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# Tries to commit the page; returns undef on _success_ and
# a version of the page with the rcs's conflict markers on failure.
# The file is relative to the srcdir.
my %params=@_;
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return unless cvs_is_controlling();
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# Check to see if the page has been changed by someone
# else since rcs_prepedit was called.
my ($oldrev)=$params{token}=~/^([0-9]+)$/; # untaint
my $rev=cvs_info("Repository revision", "$config{srcdir}/$params{file}");
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if (defined $rev && defined $oldrev && $rev != $oldrev) {
# Merge their changes into the file that we've
# changed.
cvs_runcvs('update', $params{file}) ||
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warn("cvs merge from $oldrev to $rev failed\n");
}
if (! cvs_runcvs('commit', '-m',
IkiWiki::possibly_foolish_untaint(commitmessage(%params)))) {
my $conflict=readfile("$config{srcdir}/$params{file}");
cvs_runcvs('update', '-C', $params{file}) ||
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warn("cvs revert failed\n");
return $conflict;
}
return undef # success
}
sub rcs_commit_staged (@) {
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# Commits all staged changes. Changes can be staged using rcs_add,
# rcs_remove, and rcs_rename.
my %params=@_;
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if (! cvs_runcvs('commit', '-m',
IkiWiki::possibly_foolish_untaint(commitmessage(%params)))) {
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warn "cvs staged commit failed\n";
return 1; # failure
}
return undef # success
}
sub rcs_add ($) {
# filename is relative to the root of the srcdir
my $file=shift;
my $parent=IkiWiki::dirname($file);
my @files_to_add = ($file);
until ((length($parent) == 0) || cvs_is_controlling("$config{srcdir}/$parent")){
push @files_to_add, $parent;
$parent = IkiWiki::dirname($parent);
}
while ($file = pop @files_to_add) {
if (@files_to_add == 0) {
cvs_runcvs('add', cvs_keyword_subst_args($file)) ||
warn("cvs add file $file failed\n");
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}
else {
cvs_runcvs('add', $file) ||
warn("cvs add dir $file failed\n");
}
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}
}
sub rcs_remove ($) {
# filename is relative to the root of the srcdir
my $file=shift;
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return unless cvs_is_controlling();
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cvs_runcvs('rm', '-f', $file) ||
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warn("cvs rm $file failed\n");
}
sub rcs_rename ($$) {
# filenames relative to the root of the srcdir
my ($src, $dest)=@_;
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return unless cvs_is_controlling();
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local $CWD = $config{srcdir};
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if (system("mv", "$src", "$dest") != 0) {
warn("filesystem rename failed\n");
}
rcs_add($dest);
rcs_remove($src);
}
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sub rcs_recentchanges ($) {
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my $num = shift;
my @ret;
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return unless cvs_is_controlling();
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eval q{use Date::Parse};
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error($@) if $@;
local $CWD = $config{srcdir};
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# There's no cvsps option to get the last N changesets.
# Write full output to a temp file and read backwards.
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eval q{use File::Temp qw/tempfile/};
error($@) if $@;
eval q{use File::ReadBackwards};
error($@) if $@;
my ($tmphandle, $tmpfile) = tempfile();
system("env TZ=UTC cvsps -q --cvs-direct -z 30 -x >$tmpfile");
if ($? == -1) {
error "couldn't run cvsps: $!\n";
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}
elsif (($? >> 8) != 0) {
error "cvsps exited " . ($? >> 8) . ": $!\n";
}
tie(*SPSVC, 'File::ReadBackwards', $tmpfile)
|| error "couldn't open $tmpfile for read: $!\n";
while (my $line = <SPSVC>) {
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$line =~ /^$/ || error "expected blank line, got $line";
my ($rev, $user, $committype, $when);
my (@message, @pages);
# We're reading backwards.
# Forwards, an entry looks like so:
# ---------------------
# PatchSet $rev
# Date: $when
# Author: $user (or user CGI runs as, for web commits)
# Branch: branch
# Tag: tag
# Log:
# @message_lines
# Members:
# @pages (and revisions)
#
while ($line = <SPSVC>) {
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last if ($line =~ /^Members:/);
for ($line) {
s/^\s+//;
s/\s+$//;
}
my ($page, $revs) = split(/:/, $line);
my ($oldrev, $newrev) = split(/->/, $revs);
$oldrev =~ s/INITIAL/0/;
$newrev =~ s/\(DEAD\)//;
my $diffurl = defined $config{diffurl} ? $config{diffurl} : "";
my $epage = join('/',
map { uri_escape_utf8($_) } split('/', $page)
);
$diffurl=~s/\[\[file\]\]/$epage/g;
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$diffurl=~s/\[\[r1\]\]/$oldrev/g;
$diffurl=~s/\[\[r2\]\]/$newrev/g;
unshift @pages, {
page => pagename($page),
diffurl => $diffurl,
} if length $page;
}
while ($line = <SPSVC>) {
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last if ($line =~ /^Log:$/);
chomp $line;
unshift @message, { line => $line };
}
$committype = "web";
if (defined $message[0] &&
$message[0]->{line}=~/$config{web_commit_regexp}/) {
$user=defined $2 ? "$2" : "$3";
$message[0]->{line}=$4;
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}
else {
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$committype="cvs";
}
$line = <SPSVC>; # Tag
$line = <SPSVC>; # Branch
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$line = <SPSVC>;
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if ($line =~ /^Author: (.*)$/) {
$user = $1 unless defined $user && length $user;
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}
else {
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error "expected Author, got $line";
}
$line = <SPSVC>;
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if ($line =~ /^Date: (.*)$/) {
$when = str2time($1, 'UTC');
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}
else {
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error "expected Date, got $line";
}
$line = <SPSVC>;
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if ($line =~ /^PatchSet (.*)$/) {
$rev = $1;
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}
else {
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error "expected PatchSet, got $line";
}
$line = <SPSVC>; # ---------------------
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push @ret, {
rev => $rev,
user => $user,
committype => $committype,
when => $when,
message => [@message],
pages => [@pages],
} if @pages;
last if @ret >= $num;
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}
unlink($tmpfile) || error "couldn't unlink $tmpfile: $!\n";
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return @ret;
}
sub rcs_diff ($;$) {
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my $rev=IkiWiki::possibly_foolish_untaint(int(shift));
my $maxlines=shift;
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local $CWD = $config{srcdir};
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# diff output is unavoidably preceded by the cvsps PatchSet entry
my @cvsps = `env TZ=UTC cvsps -q --cvs-direct -z 30 -g -s $rev`;
my $blank_lines_seen = 0;
# skip log, get to the diff
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while (my $line = shift @cvsps) {
$blank_lines_seen++ if ($line =~ /^$/);
last if $blank_lines_seen == 2;
}
@cvsps = @cvsps[0..$maxlines-1]
if defined $maxlines && @cvsps > $maxlines;
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if (wantarray) {
return @cvsps;
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}
else {
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return join("", @cvsps);
}
}
sub rcs_getctime ($) {
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my $file=shift;
local $CWD = $config{srcdir};
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my $cvs_log_infoline=qr/^date: (.+);\s+author/;
open CVSLOG, "cvs -Q log -r1.1 '$file' |"
|| error "couldn't get cvs log output: $!\n";
my $date;
while (<CVSLOG>) {
if (/$cvs_log_infoline/) {
$date=$1;
}
}
close CVSLOG || warn "cvs log $file exited $?";
if (! defined $date) {
warn "failed to parse cvs log for $file\n";
return 0;
}
eval q{use Date::Parse};
error($@) if $@;
$date=str2time($date, 'UTC');
debug("found ctime ".localtime($date)." for $file");
return $date;
}
sub rcs_getmtime ($) {
error "rcs_getmtime is not implemented for cvs\n"; # TODO
}
# INTERNAL SUPPORT ROUTINES
sub commitmessage (@) {
my %params=@_;
if (defined $params{session}) {
if (defined $params{session}->param("name")) {
return "web commit by ".
$params{session}->param("name").
(length $params{message} ? ": $params{message}" : "");
}
elsif (defined $params{session}->remote_addr()) {
return "web commit from ".
$params{session}->remote_addr().
(length $params{message} ? ": $params{message}" : "");
}
}
return $params{message};
}
sub cvs_info ($$) {
my $field=shift;
my $file=shift;
local $CWD = $config{srcdir};
my $info=`cvs status $file`;
my ($ret)=$info=~/^\s*$field:\s*(\S+)/m;
return $ret;
}
sub cvs_is_controlling {
my $dir=shift;
$dir=$config{srcdir} unless defined($dir);
return (-d "$dir/CVS") ? 1 : 0;
}
sub cvs_keyword_subst_args ($) {
my $file = shift;
local $CWD = $config{srcdir};
eval q{use File::MimeInfo};
error($@) if $@;
my $filemime = File::MimeInfo::default($file);
# if (-T $file) {
defined($filemime) && $filemime eq 'text/plain'
? return ('-kkv', $file)
: return ('-kb', $file);
}
sub cvs_runcvs(@) {
my @cmd = @_;
unshift @cmd, 'cvs', '-Q';
# CVS can't operate outside a srcdir, so we're always setting $CWD.
# "local $CWD" restores the previous value when we go out of scope.
# Usually that's correct. But if we're removing the last file from
# a directory, the post-commit hook will exec in a working directory
# that's about to not exist (CVS will prune it).
#
# chdir() manually here, so we can selectively not chdir() back.
my $oldcwd = $CWD;
chdir($config{srcdir});
eval q{
use IPC::Open3;
use Symbol qw(gensym);
use IO::File;
};
error($@) if $@;
my $cvsout = '';
my $cvserr = '';
local *CATCHERR = IO::File->new_tmpfile;
my $pid = open3(gensym(), \*CATCHOUT, ">&CATCHERR", @cmd);
while (my $l = <CATCHOUT>) {
$cvsout .= $l
unless 1;
}
waitpid($pid, 0);
my $ret = $? >> 8;
seek CATCHERR, 0, 0;
while (my $l = <CATCHERR>) {
$cvserr .= $l
unless $l =~ /^cvs commit: changing keyword expansion /;
}
print STDOUT $cvsout;
print STDERR $cvserr;
chdir($oldcwd) if -d $oldcwd;
return ($ret == 0) ? 1 : 0;
}
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