199 lines
6.9 KiB
Markdown
199 lines
6.9 KiB
Markdown
Here's Thomas Schwinge unfinished darcs support for ikiwiki.
|
|
|
|
> I haven't been working on this for months and also won't in the near
|
|
> future. Feel free to use what I have done so
|
|
> far and bring it into an usable state! Also, feel free to contact me
|
|
> if there are questions.
|
|
|
|
-- [Thomas Schwinge](mailto:tschwinge@gnu.org)
|
|
|
|
# Support for the darcs rcs, <URL:http://darcs.net/>.
|
|
# Copyright (C) 2006 Thomas Schwinge <tschwinge@gnu.org>
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify it
|
|
# under the terms of the GNU General Public License as published by the
|
|
# Free Software Foundation; either version 2 of the License, or (at your
|
|
# option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along
|
|
# with this program; if not, write to the Free Software Foundation, Inc.,
|
|
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
|
|
# We're guaranteed to be the only instance of ikiwiki running at a given
|
|
# time. It is essential that only ikiwiki is working on a particular
|
|
# repository. That means one instance of ikiwiki and it also means that
|
|
# you must not `darcs push' into this repository, as this might create
|
|
# race conditions, as I understand it.
|
|
|
|
|
|
use warnings;
|
|
use strict;
|
|
use IkiWiki;
|
|
|
|
package IkiWiki;
|
|
|
|
|
|
# Which darcs executable to use.
|
|
my $darcs = ($ENV{DARCS} or 'darcs');
|
|
|
|
|
|
# Internal functions.
|
|
|
|
sub darcs_info ($$$) {
|
|
my $field = shift;
|
|
my $repodir = shift;
|
|
my $file = shift; # Relative to the repodir.
|
|
|
|
my $child = open(DARCS_CHANGES, "-|");
|
|
if (! $child) {
|
|
exec($darcs, 'changes', '--repo=' . $repodir, '--xml-output', $file) or
|
|
error('failed to run `darcs changes\'');
|
|
}
|
|
|
|
# Brute force for now. :-/
|
|
while (<DARCS_CHANGES>) {
|
|
last if /^<\/created_as>$/;
|
|
}
|
|
($_) = <DARCS_CHANGES> =~ /$field=\'([^\']+)/;
|
|
$field eq 'hash' and s/\.gz//; # Strip away the `.gz' from `hash'es.
|
|
|
|
close(DARCS_CHANGES) or error('`darcs changes\' exited ' . $?);
|
|
|
|
return $_;
|
|
}
|
|
|
|
|
|
# Exported functions.
|
|
|
|
sub rcs_update () {
|
|
# Not needed.
|
|
}
|
|
|
|
sub rcs_prepedit ($) {
|
|
# Prepares to edit a file under revision control. Returns a token that
|
|
# must be passed to rcs_commit() when the file is to be commited. For us,
|
|
# this token the hash value of the latest patch that modifies the file,
|
|
# i.e. something like its current revision. If the file is not yet added
|
|
# to the repository, we return TODO: the empty string.
|
|
|
|
my $file = shift; # Relative to the repodir.
|
|
|
|
my $hash = darcs_info('hash', $config{srcdir}, $file);
|
|
return defined $hash ? $hash : "";
|
|
}
|
|
|
|
sub rcs_commit ($$$) {
|
|
# Commit the page. Returns `undef' on success and a version of the page
|
|
# with conflict markers on failure.
|
|
|
|
my $file = shift; # Relative to the repodir.
|
|
my $message = shift;
|
|
my $rcstoken = shift;
|
|
|
|
# Compute if the ``revision'' of $file changed.
|
|
my $changed = darcs_info('hash', $config{srcdir}, $file) ne $rcstoken;
|
|
|
|
# Yes, the following is a bit convoluted.
|
|
if ($changed) {
|
|
# TODO. Invent a better, non-conflicting name.
|
|
rename("$config{srcdir}/$file", "$config{srcdir}/$file.save") or
|
|
error("failed to rename $file to $file.save: $!");
|
|
|
|
# Roll the repository back to $rcstoken.
|
|
|
|
# TODO. Can we be sure that no changes are lost? I think that
|
|
# we can, if we make sure that the `darcs push' below will always
|
|
# succeed.
|
|
|
|
# We need to revert everything as `darcs obliterate' might choke
|
|
# otherwise.
|
|
# TODO: `yes | ...' needed? Doesn't seem so.
|
|
system($darcs, "revert", "--repodir=" . $config{srcdir}, "--all") and
|
|
error("`darcs revert' failed");
|
|
# Remove all patches starting at $rcstoken.
|
|
# TODO. Something like `yes | darcs obliterate ...' seems to be needed.
|
|
system($darcs, "obliterate", "--quiet", "--repodir" . $config{srcdir},
|
|
"--match", "hash " . $rcstoken) and
|
|
error("`darcs obliterate' failed");
|
|
# Restore the $rcstoken one.
|
|
system($darcs, "pull", "--quiet", "--repodir=" . $config{srcdir},
|
|
"--match", "hash " . $rcstoken, "--all") and
|
|
error("`darcs pull' failed");
|
|
|
|
# We're back at $rcstoken. Re-install the modified file.
|
|
rename("$config{srcdir}/$file.save", "$config{srcdir}/$file") or
|
|
error("failed to rename $file.save to $file: $!");
|
|
}
|
|
|
|
# Record the changes.
|
|
# TODO: What if $message is empty?
|
|
writefile("$file.log", $config{srcdir}, $message);
|
|
system($darcs, 'record', '--repodir=' . $config{srcdir}, '--all',
|
|
'--logfile=' . "$config{srcdir}/$file.log",
|
|
'--author=' . 'web commit <web-hurd@gnu.org>', $file) and
|
|
error('`darcs record\' failed');
|
|
|
|
# Update the repository by pulling from the default repository, which is
|
|
# master repository.
|
|
system($darcs, "pull", "--quiet", "--repodir=" . $config{srcdir},
|
|
"--all") and error("`darcs pull' failed\n");
|
|
|
|
# If this updating yields any conflicts, we'll record them now to resolve
|
|
# them. If nothing is recorded, there are no conflicts.
|
|
$rcstoken = darcs_info('hash', $config{srcdir}, $file);
|
|
# TODO: Use only the first line here, i.e. only the patch name?
|
|
writefile("$file.log", $config{srcdir}, 'resolve conflicts: ' . $message);
|
|
system($darcs, 'record', '--repodir=' . $config{srcdir}, '--all',
|
|
'--logfile=' . "$config{srcdir}/$file.log",
|
|
'--author=' . 'web commit <web-hurd@gnu.org>', $file) and
|
|
error('`darcs record\' failed');
|
|
my $conflicts = darcs_info('hash', $config{srcdir}, $file) ne $rcstoken;
|
|
unlink("$config{srcdir}/$file.log") or
|
|
error("failed to remove `$file.log'");
|
|
|
|
# Push the changes to the main repository.
|
|
system($darcs, 'push', '--quiet', '--repodir=' . $config{srcdir}, '--all')
|
|
and error('`darcs push\' failed');
|
|
# TODO: darcs send?
|
|
|
|
if ($conflicts) {
|
|
my $document = readfile("$config{srcdir}/$file");
|
|
# Try to leave everything in a consistent state.
|
|
# TODO: `yes | ...' needed? Doesn't seem so.
|
|
system($darcs, "revert", "--repodir=" . $config{srcdir}, "--all") and
|
|
warn("`darcs revert' failed.\n");
|
|
return $document;
|
|
} else {
|
|
return undef;
|
|
}
|
|
}
|
|
|
|
sub rcs_add ($) {
|
|
my $file = shift; # Relative to the repodir.
|
|
|
|
# Intermediate directories will be added automagically.
|
|
system($darcs, 'add', '--quiet', '--repodir=' . $config{srcdir},
|
|
'--boring', $file) and error('`darcs add\' failed');
|
|
}
|
|
|
|
sub rcs_recentchanges ($) {
|
|
warn('rcs_recentchanges() is not implemented');
|
|
return 'rcs_recentchanges() is not implemented';
|
|
}
|
|
|
|
sub rcs_notify () {
|
|
warn('rcs_notify() is not implemented');
|
|
}
|
|
|
|
sub rcs_getctime () {
|
|
warn('rcs_getctime() is not implemented');
|
|
}
|
|
|
|
1
|