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Attempt to fix a `TODO` in `Automator.pm` in combination with the Mercurial backend.
1. To define hooks, Mercurial uses paths given in the config file `.hg/hgrc`. To enable Mercurial to call `ikiwiki-wrapper` automatically after blog/wiki setup, ikiwiki thus needs to create `hgrc`.
2. To reflect changes in `$config{srcdir}` and/or `$config{mercurial_wrapper}`, relevant lines in `hgrc` need to be updated on wrapper creation.
ikiwiki can keep track of lines in `hgrc` for which it is responsible by adding a `.ikiwiki` suffix to its hooks. This is correct and recommended markup, Mercurial-wise.
Two ways follow below. I prefer the long one. --[[Daniel Andersson]]
> I comment myself: this can probably be solved without adding ad-hoc hooks and stuff (maybe not as "correct" as changing the config file only directly after wrappers have been generated, but good enough). I have a large rewrite of `mercurial.pm` ready, currently under local testing before I upload it for comments, trying to make it equal in function to `git.pm`. Comments below are of course welcome, but I will look into other ways of solving it later. Maybe `rcs_checkconfig` or `rcs_genwrapper` should host the `hgrc`-changing code. --[[Daniel Andersson]]
>> Having a hook that runs after a wrapper is generated may well be a good
>> thing anyway. In ikiwiki-hosting, there are some genwrapper hooks
>> that don't add any code to the wrapper, but are there only to run at,
>> essentially, that time.
>>
>> With that said, here it seems like unnecessary complexity.
>> Why is `mercurial_wrapper` configurable at all? Why not just always
>> write it to a specific place relative to the srcdir, and always make
>> the hgrc look there?
>>
>> (Other rcs plugins have good reasons to make their wrappers
>> configurable, because one might want the wrapper to run as a git
>> post-update or post-commit hook.) --[[Joey]]
Compact way (addresses only point 1)
------------------------------------
[This patch at pastebin](http://pastebin.com/by9f4dwX) ([raw version](http://pastebin.com/raw.php?i=by9f4dwX)).
Set default `ikiwiki-wrapper` path.
diff -r 8faf136ca94f Setup/Automator.pm
--- a/Setup/Automator.pm Tue Jul 19 21:04:13 2011 +0200
+++ b/Setup/Automator.pm Wed Jul 20 15:33:21 2011 +0200
@@ -75,8 +75,7 @@
print STDERR "warning: do not know how to set up the bzr_wrapper hook!\n";
}
elsif ($config{rcs} eq 'mercurial') {
- # TODO
- print STDERR "warning: do not know how to set up the mercurial_wrapper hook!\n";
+ $config{mercurial_wrapper}=$config{srcdir}."/.hg/ikiwiki-wrapper";
}
elsif ($config{rcs} eq 'tla') {
# TODO
Create `$config{srcdir}/.hg/hgrc` with hook info during auto-installation script. Use relative paths to not require manual `hgrc` intervention if `$config{srcdir}` is changed. If `$config{mercurial_wrapper}` is changed, manual edit of `hgrc` is needed to catch the new wrapper path.
(Is there a security risk with relative paths?)
> The code seems to assume that hg will be run from within the srcdir,
> specifically the top of the srcdir. If it's run from somewhere else,
> even a subdirectory, this will fail to find the wrapper, or could
> run some other program. Unless mercurial always interprets these paths
> as relative to the top of the repository? --[[Joey]]
@@ -187,6 +186,22 @@
die "ikiwiki --wrappers --setup $config{dumpsetup} failed";
}
+ # Setup initial config file for Mercurial to hook up the wrapper.
+ if ($config{rcs} eq 'mercurial' && exists $config{mercurial_wrapper}
+ && length $config{mercurial_wrapper}) {
+ # Use a relative path to avoid having to manually change the
+ # autogenerated hgrc if the user changes $config{srcdir}.
+ use File::Spec;
+ my $mercurial_wrapper_relpath=File::Spec->abs2rel($config{mercurial_wrapper}, $config{srcdir});
+ open (HGRC, '>', $config{srcdir}.'/.hg/hgrc');
+ print HGRC <<EOF;
+[hooks]
+post-commit.ikiwiki = $mercurial_wrapper_relpath
+incoming.ikiwiki = $mercurial_wrapper_relpath
+EOF
+ close (HGRC);
+ }
+
# Add it to the wikilist.
mkpath("$ENV{HOME}/.ikiwiki");
open (WIKILIST, ">>$ENV{HOME}/.ikiwiki/wikilist") || die "$ENV{HOME}/.ikiwiki/wikilist: $!";
Less compact but more robust way (addresses point 1 and 2)
----------------------------------------------------------
[This complete patch at pastebin](http://pastebin.com/AcDHjbK6) ([raw version](http://pastebin.com/raw.php?i=AcDHjbK6)).
This way leaks onto additional files and adds general functionality that may or may not be wanted. The main part of the extra code is contained within `mercurial.pm`, though.
Set default `ikiwiki-wrapper` path.
diff -r b08179653c00 IkiWiki/Setup/Automator.pm
--- a/IkiWiki/Setup/Automator.pm Wed Jul 20 16:56:09 2011 +0200
+++ b/IkiWiki/Setup/Automator.pm Wed Jul 20 19:28:21 2011 +0200
@@ -75,8 +75,7 @@
print STDERR "warning: do not know how to set up the bzr_wrapper hook!\n";
}
elsif ($config{rcs} eq 'mercurial') {
- # TODO
- print STDERR "warning: do not know how to set up the mercurial_wrapper hook!\n";
+ $config{mercurial_wrapper}=$config{srcdir}."/.hg/ikiwiki-wrapper";
}
elsif ($config{rcs} eq 'tla') {
# TODO
Create `$config{srcdir}/.hg/hgrc` during auto-installation with hook info.
@@ -182,6 +181,19 @@
}
}
+ # Setup initial config file for Mercurial to hook up the wrapper. The
+ # path to the wrapper will be automatically added when it is generated.
+ if ($config{rcs} eq 'mercurial' && exists $config{mercurial_wrapper}
+ && length $config{mercurial_wrapper}) {
+ open (HGRC, '>', $config{srcdir}.'/.hg/hgrc');
+ print HGRC <<EOF;
+[hooks]
+post-commit.ikiwiki =
+incoming.ikiwiki =
+EOF
+ close (HGRC);
+ }
+
# Add wrappers, make live.
if (system("ikiwiki", "--wrappers", "--setup", $config{dumpsetup}) != 0) {
die "ikiwiki --wrappers --setup $config{dumpsetup} failed";
`hgrc` is setup initially. Below follows code to keep `hgrc` updated.
Add backend specific function `rcs_wrapper_postcall()` for later call in `Wrappers.pm`.
diff -r b08179653c00 IkiWiki/Plugin/mercurial.pm
--- a/IkiWiki/Plugin/mercurial.pm Wed Jul 20 16:56:09 2011 +0200
+++ b/IkiWiki/Plugin/mercurial.pm Wed Jul 20 19:28:21 2011 +0200
@@ -21,6 +21,7 @@
hook(type => "rcs", id => "rcs_diff", call => \&rcs_diff);
hook(type => "rcs", id => "rcs_getctime", call => \&rcs_getctime);
hook(type => "rcs", id => "rcs_getmtime", call => \&rcs_getmtime);
+ hook(type => "rcs", id => "rcs_wrapper_postcall", call => \&rcs_wrapper_postcall);
}
sub checkconfig () {
Pass variable to `gen_wrapper()` to decide if `rcs_wrapper_postcall()` should run. Default is `1` to update `hgrc`, since it is done non-intrusive (won't create `hgrc` if it doesn't exist, won't overwrite anything unless it is set by ikiwiki itself).
@@ -28,6 +29,7 @@
push @{$config{wrappers}}, {
wrapper => $config{mercurial_wrapper},
wrappermode => (defined $config{mercurial_wrappermode} ? $config{mercurial_wrappermode} : "06755"),
+ wrapper_postcall => (defined $config{mercurial_wrapper_hgrc_update} ? $config{mercurial_wrapper_hgrc_update} : "1"),
};
}
}
Include default configuration value and comment.
@@ -53,6 +55,13 @@
safe => 0,
rebuild => 0,
},
+ mercurial_wrapper_hgrc_update => {
+ type => "string",
+ example => "1",
+ description => "updates existing hgrc to reflect path changes for mercurial_wrapper",
+ safe => 0,
+ rebuild => 0,
+ },
historyurl => {
type => "string",
example => "http://example.com:8000/log/tip/\[[file]]",
`hgrc` should be updated to point to the new wrapper path. The regexp transforms lines as e.g.
post-commit.ikiwiki = /home/daniel/blog/.hg/ikiwiki-wrapper-oldpath
incoming.ikiwiki = /home/daniel/blog/.hg/ikiwiki-wrapper-oldpath
to
post-commit.ikiwiki = $config{mercurial_wrapper}
incoming.ikiwiki = $config{mercurial_wrapper}
with absolute paths.
@@ -402,4 +411,23 @@
return findtimes($file, 0);
}
+sub rcs_wrapper_postcall($) {
+ # Update hgrc if it exists. Change post-commit/incoming hooks with the
+ # .ikiwiki suffix to point to the wrapper path given in the setup file.
+ # Work with a tempfile to not delete hgrc if the loop is interrupted
+ # midway.
+ my $hgrc=$config{srcdir}.'/.hg/hgrc';
+ my $backup_suffix='.ikiwiki.bak';
+ if (-e $hgrc) {
+ use File::Spec;
+ my $mercurial_wrapper_abspath=File::Spec->rel2abs($config{mercurial_wrapper}, $config{srcdir});
+ local ($^I, @ARGV)=($backup_suffix, $hgrc);
+ while (<>) {
+ s/^(post-commit|incoming)(\.ikiwiki[ \t]*=[ \t]*).*$/$1$2$mercurial_wrapper_abspath/;
+ print;
+ }
+ unlink($hgrc.$backup_suffix);
+ }
+}
+
1
`rcs_wrapper_postcall` is made available.
diff -r b08179653c00 IkiWiki.pm
--- a/IkiWiki.pm Wed Jul 20 16:56:09 2011 +0200
+++ b/IkiWiki.pm Wed Jul 20 19:28:21 2011 +0200
@@ -2059,6 +2059,10 @@
$hooks{rcs}{rcs_getmtime}{call}->(@_);
}
+sub rcs_wrapper_postcall (@) {
+ $hooks{rcs}{rcs_wrapper_postcall}{call}->(@_);
+}
+
sub rcs_receive () {
$hooks{rcs}{rcs_receive}{call}->();
}
`rcs_wrapper_postcall` is called if $config{wrapper_postcall} is true, which it should only be for Mercurial at the moment.
diff -r b08179653c00 IkiWiki/Wrapper.pm
--- a/IkiWiki/Wrapper.pm Wed Jul 20 16:56:09 2011 +0200
+++ b/IkiWiki/Wrapper.pm Wed Jul 20 19:28:21 2011 +0200
@@ -238,6 +238,10 @@
}
#translators: The parameter is a filename.
debug(sprintf(gettext("successfully generated %s"), $wrapper));
+
+ if (defined $config{wrapper_postcall} && $config{wrapper_postcall} ) {
+ IkiWiki::rcs_wrapper_postcall();
+ }
}
1
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