ikiwiki/IkiWiki/Plugin/mercurial.pm

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#!/usr/bin/perl
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package IkiWiki::Plugin::mercurial;
use warnings;
use strict;
use IkiWiki;
use Encode;
use URI::Escape q{uri_escape_utf8};
use open qw{:utf8 :std};
sub import {
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hook(type => "checkconfig", id => "mercurial", call => \&checkconfig);
hook(type => "getsetup", id => "mercurial", 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);
}
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sub checkconfig () {
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if (exists $config{mercurial_wrapper} && length $config{mercurial_wrapper}) {
push @{$config{wrappers}}, {
wrapper => $config{mercurial_wrapper},
wrappermode => (defined $config{mercurial_wrappermode} ? $config{mercurial_wrappermode} : "06755"),
};
}
}
sub getsetup () {
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return
plugin => {
safe => 0, # rcs plugin
rebuild => undef,
section => "rcs",
},
mercurial_wrapper => {
type => "string",
#example => # FIXME add example
description => "mercurial post-commit hook to generate",
safe => 0, # file
rebuild => 0,
},
mercurial_wrappermode => {
type => "string",
example => '06755',
description => "mode for mercurial_wrapper (can safely be made suid)",
safe => 0,
rebuild => 0,
},
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historyurl => {
type => "string",
example => "http://example.com:8000/log/tip/[[file]]",
description => "url to hg serve'd repository, to show file history ([[file]] substituted)",
safe => 1,
rebuild => 1,
},
diffurl => {
type => "string",
example => "http://localhost:8000/?fd=[[r2]];file=[[file]]",
description => "url to hg serve'd repository, to show diff ([[file]] and [[r2]] substituted)",
safe => 1,
rebuild => 1,
},
}
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sub safe_hg (&@) {
# Start a child process safely without resorting to /bin/sh.
# Returns command output (in list content) or success state
# (in scalar context), or runs the specified data handler.
my ($error_handler, $data_handler, @cmdline) = @_;
my $pid = open my $OUT, "-|";
error("Cannot fork: $!") if !defined $pid;
if (!$pid) {
# In child.
# hg commands want to be in wc.
chdir $config{srcdir}
or error("cannot chdir to $config{srcdir}: $!");
exec @cmdline or error("Cannot exec '@cmdline': $!");
}
# In parent.
my @lines;
while (<$OUT>) {
chomp;
if (! defined $data_handler) {
push @lines, $_;
}
else {
last unless $data_handler->($_);
}
}
close $OUT;
$error_handler->("'@cmdline' failed: $!") if $? && $error_handler;
return wantarray ? @lines : ($? == 0);
}
# Convenient wrappers.
sub run_or_die ($@) { safe_hg(\&error, undef, @_) }
sub run_or_cry ($@) { safe_hg(sub { warn @_ }, undef, @_) }
sub run_or_non ($@) { safe_hg(undef, undef, @_) }
sub mercurial_log ($) {
my $out = shift;
my @infos;
while (<$out>) {
my $line = $_;
my ($key, $value);
if (/^description:/) {
$key = "description";
$value = "";
# slurp everything as the description text
# until the next changeset
while (<$out>) {
if (/^changeset: /) {
$line = $_;
last;
}
$value .= $_;
}
local $/ = "";
chomp $value;
$infos[$#infos]{$key} = $value;
}
chomp $line;
($key, $value) = split /: +/, $line, 2;
if ($key eq "changeset") {
push @infos, {};
# remove the revision index, which is strictly
# local to the repository
$value =~ s/^\d+://;
}
$infos[$#infos]{$key} = $value;
}
close $out;
return @infos;
}
sub rcs_update () {
run_or_cry('hg', '-q', 'update');
}
sub rcs_prepedit ($) {
return "";
}
sub rcs_commit (@) {
my %params=@_;
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return rcs_commit_helper(@_);
}
sub rcs_commit_helper (@) {
my %params=@_;
my %env=%ENV;
$ENV{HGENCODING} = 'utf-8';
my $user="Anonymous";
if (defined $params{session}) {
if (defined $params{session}->param("name")) {
$user = $params{session}->param("name");
}
elsif (defined $params{session}->remote_addr()) {
$user = $params{session}->remote_addr();
}
my $nickname=$user;
if (defined $params{session}->param("nickname")) {
$nickname=encode_utf8($params{session}->param("nickname"));
$nickname=~s/\s+/_/g;
$nickname=~s/[^-_0-9[:alnum:]]+//g;
}
$ENV{HGUSER} = encode_utf8($user . ' <' . $nickname . '@web>');
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}
if (! length $params{message}) {
$params{message} = "no message given";
}
$params{message} = IkiWiki::possibly_foolish_untaint($params{message});
my @opts;
if (exists $params{file}) {
push @opts, '--', $params{file};
}
# hg commit returns non-zero if nothing really changed.
# So we should ignore its exit status (hence run_or_non).
run_or_non('hg', 'commit', '-m', $params{message}, '-q', @opts);
%ENV=%env;
return undef; # success
}
sub rcs_commit_staged (@) {
# Commits all staged changes. Changes can be staged using rcs_add,
# rcs_remove, and rcs_rename.
return rcs_commit_helper(@_);
}
sub rcs_add ($) {
my ($file) = @_;
run_or_cry('hg', 'add', $file);
}
sub rcs_remove ($) {
# Remove file from archive.
my ($file) = @_;
run_or_cry('hg', 'remove', '-f', $file);
}
sub rcs_rename ($$) {
my ($src, $dest) = @_;
run_or_cry('hg', 'rename', '-f', $src, $dest);
}
sub rcs_recentchanges ($) {
my ($num) = @_;
my %env=%ENV;
$ENV{HGENCODING} = 'utf-8';
my @cmdline = ("hg", "-R", $config{srcdir}, "log", "-v", "-l", $num,
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"--style", "default");
open (my $out, "@cmdline |");
eval q{use Date::Parse};
error($@) if $@;
my @ret;
foreach my $info (mercurial_log($out)) {
my @pages = ();
my @message = ();
foreach my $msgline (split(/\n/, $info->{description})) {
push @message, { line => $msgline };
}
foreach my $file (split / /,$info->{files}) {
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my $diffurl = defined $config{diffurl} ? $config{'diffurl'} : "";
my $efile = uri_escape_utf8($file);
$diffurl =~ s/\[\[file\]\]/$efile/go;
$diffurl =~ s/\[\[r2\]\]/$info->{changeset}/go;
push @pages, {
page => pagename($file),
diffurl => $diffurl,
};
}
#"user <email@domain.net>": parse out "user".
my $user = $info->{"user"};
$user =~ s/\s*<.*>\s*$//;
$user =~ s/^\s*//;
#"user <nickname@web>": if "@web" hits, set $web_commit=true.
my $web_commit = ($info->{'user'} =~ /\@web>/);
#"user <nickname@web>": if user is a URL (hits "://") and "@web"
#was present, parse out nick.
my $nickname;
if ($user =~ /:\/\// && $web_commit) {
$nickname = $info->{'user'};
$nickname =~ s/^[^<]*<([^\@]+)\@web>\s*$/$1/;
}
push @ret, {
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rev => $info->{"changeset"},
user => $user,
nickname => $nickname,
committype => $web_commit ? "web" : "hg",
when => str2time($info->{"date"}),
message => [@message],
pages => [@pages],
};
}
%ENV=%env;
return @ret;
}
sub rcs_diff ($;$) {
my $rev=shift;
my $maxlines=shift;
my @lines;
my $addlines=sub {
my $line=shift;
return if defined $maxlines && @lines == $maxlines;
push @lines, $line."\n"
if (@lines || $line=~/^diff --git/);
return 1;
};
safe_hg(undef, $addlines, "hg", "diff", "-c", $rev, "-g");
if (wantarray) {
return @lines;
}
else {
return join("", @lines);
}
}
{
my %time_cache;
sub findtimes ($$) {
my $file=shift;
my $id=shift; # 0 = mtime ; 1 = ctime
if (! keys %time_cache) {
my $date;
# It doesn't seem possible to specify the format wanted for the
# changelog (same format as is generated in git.pm:findtimes(),
# though the date differs slightly) without using a style
# _file_. There is a "hg log" switch "--template" to directly
# control simple output formatting, but in this case, the
# {file} directive must be redefined, which can only be done
# with "--style".
#
# If {file} is not redefined, all files are output on a single
# line separated with a space. It is not possible to conclude
# if the space is part of a filename or just a separator, and
# thus impossible to use in this case.
#
# Some output filters are available in hg, but they are not fit
# for this cause (and would slow down the process
# unnecessarily).
eval q{use File::Temp};
error $@ if $@;
my ($tmpl_fh, $tmpl_filename) = File::Temp::tempfile(UNLINK => 1);
print $tmpl_fh 'changeset = "{date}\\n{files}\\n"' . "\n";
print $tmpl_fh 'file = "{file}\\n"' . "\n";
foreach my $line (run_or_die('hg', 'log', '--style', $tmpl_filename)) {
if (! defined $date && $line =~ /^(\d+)/) {
$date=$1;
}
elsif (! length $line) {
$date=undef;
}
else {
my $f=$line;
if (! $time_cache{$f}) {
$time_cache{$f}[0]=$date; # mtime
}
$time_cache{$f}[1]=$date; # ctime
}
}
}
return exists $time_cache{$file} ? $time_cache{$file}[$id] : 0;
}
}
sub rcs_getctime ($) {
my $file = shift;
return findtimes($file, 1);
}
sub rcs_getmtime ($) {
my $file = shift;
return findtimes($file, 0);
}
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