430 lines
11 KiB
Perl
430 lines
11 KiB
Perl
#!/usr/bin/perl
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package IkiWiki::Plugin::darcs;
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use warnings;
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use strict;
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use IkiWiki;
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sub import {
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hook(type => "checkconfig", id => "darcs", call => \&checkconfig);
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hook(type => "getsetup", id => "darcs", call => \&getsetup);
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hook(type => "rcs", id => "rcs_update", call => \&rcs_update);
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hook(type => "rcs", id => "rcs_prepedit", call => \&rcs_prepedit);
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hook(type => "rcs", id => "rcs_commit", call => \&rcs_commit);
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hook(type => "rcs", id => "rcs_commit_staged", call => \&rcs_commit_staged);
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hook(type => "rcs", id => "rcs_add", call => \&rcs_add);
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hook(type => "rcs", id => "rcs_remove", call => \&rcs_remove);
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hook(type => "rcs", id => "rcs_rename", call => \&rcs_rename);
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hook(type => "rcs", id => "rcs_recentchanges", call => \&rcs_recentchanges);
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hook(type => "rcs", id => "rcs_diff", call => \&rcs_diff);
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hook(type => "rcs", id => "rcs_getctime", call => \&rcs_getctime);
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}
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sub silentsystem (@) {
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open(SAVED_STDOUT, ">&STDOUT");
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open(STDOUT, ">/dev/null");
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my $ret = system @_;
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open(STDOUT, ">&SAVED_STDOUT");
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return $ret;
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}
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sub darcs_info ($$$) {
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my $field = shift;
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my $repodir = shift;
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my $file = shift; # Relative to the repodir.
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my $child = open(DARCS_CHANGES, "-|");
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if (! $child) {
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exec('darcs', 'changes', '--repodir', $repodir, '--xml-output', $file) or
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error("failed to run 'darcs changes'");
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}
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# Brute force for now. :-/
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while (<DARCS_CHANGES>) {
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last if /^<\/created_as>$/;
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}
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($_) = <DARCS_CHANGES> =~ /$field=\'([^\']+)/;
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$field eq 'hash' and s/\.gz//; # Strip away the '.gz' from 'hash'es.
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close(DARCS_CHANGES);
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return $_;
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}
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sub file_in_vc($$) {
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my $repodir = shift;
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my $file = shift;
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my $child = open(DARCS_MANIFEST, "-|");
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if (! $child) {
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exec('darcs', 'query', 'manifest', '--repodir', $repodir) or
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error("failed to run 'darcs query manifest'");
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}
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my $found=0;
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while (<DARCS_MANIFEST>) {
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$found = 1, last if /^(\.\/)?$file$/;
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}
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close(DARCS_MANIFEST) or error("'darcs query manifest' exited " . $?);
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return $found;
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}
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sub darcs_rev($) {
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my $file = shift; # Relative to the repodir.
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my $repodir = $config{srcdir};
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return "" if (! file_in_vc($repodir, $file));
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my $hash = darcs_info('hash', $repodir, $file);
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return defined $hash ? $hash : "";
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}
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sub checkconfig() {
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if (defined $config{darcs_wrapper} && length $config{darcs_wrapper}) {
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push @{$config{wrappers}}, {
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wrapper => $config{darcs_wrapper},
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wrappermode => (defined $config{darcs_wrappermode} ? $config{darcs_wrappermode} : "06755"),
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};
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}
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}
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sub getsetup() {
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return
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plugin => {
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safe => 0, # rcs plugin
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rebuild => undef,
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},
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darcs_wrapper => {
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type => "string",
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example => "/darcs/repo/_darcs/ikiwiki-wrapper",
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description => "wrapper to generate (set as master repo apply hook)",
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safe => 0, # file
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rebuild => 0,
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},
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darcs_wrappermode => {
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type => "string",
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example => '06755',
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description => "mode for darcs_wrapper (can safely be made suid)",
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safe => 0,
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rebuild => 0,
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},
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historyurl => {
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type => "string",
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example => "http://darcs.example.com/darcsweb.cgi?r=wiki;a=filehistory;f=[[file]]",
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description => "darcsweb url to show file history ([[file]] substituted)",
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safe => 1,
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rebuild => 1,
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},
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diffurl => {
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type => "string",
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example => "http://darcs.example.com/darcsweb.cgi?r=wiki;a=filediff;h=[[hash]];f=[[file]]",
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description => "darcsweb url to show a diff ([[hash]] and [[file]] substituted)",
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safe => 1,
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rebuild => 1,
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},
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}
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sub rcs_update () {
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silentsystem('darcs', "pull", "--repodir", $config{srcdir}, "-qa")
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}
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sub rcs_prepedit ($) {
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# Prepares to edit a file under revision control. Returns a token that
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# must be passed to rcs_commit() when the file is to be commited. For us,
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# this token the hash value of the latest patch that modifies the file,
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# i.e. something like its current revision.
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my $file = shift; # Relative to the repodir.
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my $rev = darcs_rev($file);
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return $rev;
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}
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sub rcs_commit ($$$;$$) {
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# Commit the page. Returns 'undef' on success and a version of the page
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# with conflict markers on failure.
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my ($file, $message, $rcstoken, $user, $ipaddr) = @_;
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# Compute if the "revision" of $file changed.
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my $changed = darcs_rev($file) ne $rcstoken;
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# Yes, the following is a bit convoluted.
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if ($changed) {
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# TODO. Invent a better, non-conflicting name.
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rename("$config{srcdir}/$file", "$config{srcdir}/$file.save") or
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error("failed to rename $file to $file.save: $!");
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# Roll the repository back to $rcstoken.
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# TODO. Can we be sure that no changes are lost? I think that
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# we can, if we make sure that the 'darcs push' below will always
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# succeed.
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# We need to revert everything as 'darcs obliterate' might choke
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# otherwise.
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# TODO: 'yes | ...' needed? Doesn't seem so.
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silentsystem('darcs', "revert", "--repodir", $config{srcdir}, "--all") == 0 ||
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error("'darcs revert' failed");
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# Remove all patches starting at $rcstoken.
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my $child = open(DARCS_OBLITERATE, "|-");
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if (! $child) {
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open(STDOUT, ">/dev/null");
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exec('darcs', "obliterate", "--repodir", $config{srcdir},
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"--match", "hash " . $rcstoken) and
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error("'darcs obliterate' failed");
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}
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1 while print DARCS_OBLITERATE "y";
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close(DARCS_OBLITERATE);
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# Restore the $rcstoken one.
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silentsystem('darcs', "pull", "--quiet", "--repodir", $config{srcdir},
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"--match", "hash " . $rcstoken, "--all") == 0 ||
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error("'darcs pull' failed");
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# We're back at $rcstoken. Re-install the modified file.
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rename("$config{srcdir}/$file.save", "$config{srcdir}/$file") or
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error("failed to rename $file.save to $file: $!");
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}
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# Record the changes.
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my $author;
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if (defined $user) {
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$author = "$user\@web";
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}
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elsif (defined $ipaddr) {
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$author = "$ipaddr\@web";
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}
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else {
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$author = "anon\@web";
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}
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if (!defined $message || !length($message)) {
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$message = "empty message";
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}
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silentsystem('darcs', 'record', '--repodir', $config{srcdir}, '--all',
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'-m', $message, '--author', $author, $file) == 0 ||
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error("'darcs record' failed");
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# Update the repository by pulling from the default repository, which is
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# master repository.
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silentsystem('darcs', "pull", "--quiet", "--repodir", $config{srcdir},
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"--all") == 0 || error("'darcs pull' failed");
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# If this updating yields any conflicts, we'll record them now to resolve
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# them. If nothing is recorded, there are no conflicts.
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$rcstoken = darcs_rev($file);
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# TODO: Use only the first line here, i.e. only the patch name?
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writefile("$file.log", $config{srcdir}, 'resolve conflicts: ' . $message);
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silentsystem('darcs', 'record', '--repodir', $config{srcdir}, '--all',
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'-m', 'resolve conflicts: ' . $message, '--author', $author, $file) == 0 ||
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error("'darcs record' failed");
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my $conflicts = darcs_rev($file) ne $rcstoken;
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unlink("$config{srcdir}/$file.log") or
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error("failed to remove '$file.log'");
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# Push the changes to the main repository.
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silentsystem('darcs', 'push', '--quiet', '--repodir', $config{srcdir}, '--all') == 0 ||
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error("'darcs push' failed");
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# TODO: darcs send?
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if ($conflicts) {
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my $document = readfile("$config{srcdir}/$file");
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# Try to leave everything in a consistent state.
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# TODO: 'yes | ...' needed? Doesn't seem so.
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silentsystem('darcs', "revert", "--repodir", $config{srcdir}, "--all") == 0 ||
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warn("'darcs revert' failed");
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return $document;
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}
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else {
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return undef;
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}
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}
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sub rcs_commit_staged($$$) {
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my ($message, $user, $ipaddr) = @_;
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my $author;
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if (defined $user) {
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$author = "$user\@web";
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}
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elsif (defined $ipaddr) {
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$author = "$ipaddr\@web";
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}
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else {
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$author = "anon\@web";
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}
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if (!defined $message || !length($message)) {
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$message = "empty message";
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}
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silentsystem('darcs', "record", "--repodir", $config{srcdir}, "-a", "-A", $author,
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"-m", $message) == 0 || error("'darcs record' failed");
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# Push the changes to the main repository.
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silentsystem('darcs', 'push', '--quiet', '--repodir', $config{srcdir}, '--all') == 0 ||
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error("'darcs push' failed");
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# TODO: darcs send?
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return undef;
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}
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sub rcs_add ($) {
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my $file = shift; # Relative to the repodir.
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if(! file_in_vc($config{srcdir}, $file)) {
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# Intermediate directories will be added automagically.
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system('darcs', 'add', '--quiet', '--repodir', $config{srcdir},
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'--boring', $file) == 0 || error("'darcs add' failed");
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}
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}
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sub rcs_remove ($) {
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my $file = shift; # Relative to the repodir.
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unlink($config{srcdir}.'/'.$file);
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}
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sub rcs_rename ($$) {
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my $a = shift; # Relative to the repodir.
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my $b = shift; # Relative to the repodir.
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system('darcs', 'mv', '--repodir', $config{srcdir}, $a, $b) == 0 ||
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error("'darcs mv' failed");
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}
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sub rcs_recentchanges ($) {
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my $num=shift;
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my @ret;
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eval q{use Date::Parse};
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eval q{use XML::Simple};
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my $repodir=$config{srcdir};
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my $child = open(LOG, "-|");
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if (! $child) {
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$ENV{"DARCS_DONT_ESCAPE_ANYTHING"}=1;
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exec("darcs", "changes", "--xml",
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"--summary",
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"--repodir", "$repodir",
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"--last", "$num")
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|| error("'darcs changes' failed to run");
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}
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my $data;
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$data .= $_ while(<LOG>);
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close LOG;
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my $log = XMLin($data, ForceArray => 1);
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foreach my $patch (@{$log->{patch}}) {
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my $date=$patch->{local_date};
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my $hash=$patch->{hash};
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my $when=str2time($date);
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my (@pages, @files, @pg);
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push @pages, $_ foreach (@{$patch->{summary}->[0]->{modify_file}});
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push @pages, $_ foreach (@{$patch->{summary}->[0]->{add_file}});
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push @pages, $_ foreach (@{$patch->{summary}->[0]->{remove_file}});
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foreach my $f (@pages) {
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$f = $f->{content} if ref $f;
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$f =~ s,^\s+,,; $f =~ s,\s+$,,; # cut whitespace
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push @files, $f;
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}
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foreach my $p (@{$patch->{summary}->[0]->{move}}) {
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push @files, $p->{from};
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}
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foreach my $f (@files) {
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my $d = defined $config{'diffurl'} ? $config{'diffurl'} : "";
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$d =~ s/\[\[file\]\]/$f/go;
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$d =~ s/\[\[hash\]\]/$hash/go;
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push @pg, {
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page => pagename($f),
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diffurl => $d,
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};
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}
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next unless (scalar @pg > 0);
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my @message;
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push @message, { line => $_ } foreach (@{$patch->{name}});
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my $committype;
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my $author;
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if ($patch->{author} =~ /(.*)\@web$/) {
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$author = $1;
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$committype = "web";
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}
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else {
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$author=$patch->{author};
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$committype = "darcs";
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}
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push @ret, {
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rev => $patch->{hash},
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user => $author,
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committype => $committype,
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when => $when,
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message => [@message],
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pages => [@pg],
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};
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}
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return @ret;
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}
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sub rcs_diff ($) {
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my $rev=shift;
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my @lines;
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foreach my $line (silentsystem("darcs", "diff", "--match", "hash ".$rev)) {
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if (@lines || $line=~/^diff/) {
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push @lines, $line."\n";
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}
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}
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if (wantarray) {
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return @lines;
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}
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else {
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return join("", @lines);
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}
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}
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sub rcs_getctime ($) {
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my $file=shift;
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eval q{use Date::Parse};
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eval q{use XML::Simple};
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local $/=undef;
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my $filer=substr($file, length($config{srcdir}));
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$filer =~ s:^[/]+::;
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my $child = open(LOG, "-|");
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if (! $child) {
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exec("darcs", "changes", "--xml", "--reverse",
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"--repodir", $config{srcdir}, $filer)
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|| error("'darcs changes $filer' failed to run");
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}
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my $data;
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{
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local $/=undef;
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$data = <LOG>;
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}
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close LOG;
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my $log = XMLin($data, ForceArray => 1);
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my $datestr = $log->{patch}[0]->{local_date};
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if (! defined $datestr) {
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warn "failed to get ctime for $filer";
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return 0;
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}
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my $date = str2time($datestr);
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debug("ctime for '$file': ". localtime($date));
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return $date;
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}
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1
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