po: clarify code with some comments

[git.ikiwiki.info.git] / IkiWiki / Wrapper.pm

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index d2cc0a69e1df4e774d082f58ac53db30a6564620..99237d3b5c5b46b6b5afb85436938b1cbbd329c4 100644 (file)
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -1,17 +1,17 @@
 #!/usr/bin/perl
 
+package IkiWiki;
+
 use warnings;
 use strict;
-use Cwd q{abs_path};
+use File::Spec;
 use Data::Dumper;
 use IkiWiki;
 
-package IkiWiki;
-
 sub gen_wrapper () { #{{{
-       $config{srcdir}=abs_path($config{srcdir});
-       $config{destdir}=abs_path($config{destdir});
-       my $this=abs_path($0);
+       $config{srcdir}=File::Spec->rel2abs($config{srcdir});
+       $config{destdir}=File::Spec->rel2abs($config{destdir});
+       my $this=File::Spec->rel2abs($0);
        if (! -x $this) {
                error(sprintf(gettext("%s doesn't seem to be executable"), $this));
        }
@@ -28,15 +28,46 @@ sub gen_wrapper () { #{{{
        my @envsave;
        push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
                       CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
-                      HTTP_COOKIE REMOTE_USER} if $config{cgi};
+                      HTTP_COOKIE REMOTE_USER HTTPS} if $config{cgi};
        my $envsave="";
        foreach my $var (@envsave) {
-               $envsave.=<<"EOF"
+               $envsave.=<<"EOF";
        if ((s=getenv("$var")))
                addenv("$var", s);
 EOF
        }
-       
+
+       my $test_receive="";
+       if ($config{test_receive}) {
+               require IkiWiki::Receive;
+               $test_receive=IkiWiki::Receive::gen_wrapper();
+       }
+
+       my $check_commit_hook="";
+       if ($config{post_commit}) {
+               # Optimise checking !commit_hook_enabled() , 
+               # so that ikiwiki does not have to be started if the
+               # hook is disabled.
+               #
+               # Note that perl's flock may be implemented using fcntl
+               # or lockf on some systems. If so, and if there is no
+               # interop between the locking systems, the true C flock will
+               # always succeed, and this optimisation won't work.
+               # The perl code will later correctly check the lock,
+               # so the right thing will still happen, though without
+               # the benefit of this optimisation.
+               $check_commit_hook=<<"EOF";
+       {
+               int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR);
+               if (fd != -1) {
+                       if (flock(fd, LOCK_SH | LOCK_NB) != 0)
+                               exit(0);
+                       close(fd);
+               }
+       }
+EOF
+       }
+
        $Data::Dumper::Indent=0; # no newlines
        my $configstring=Data::Dumper->Dump([\%config], ['*config']);
        $configstring=~s/\\/\\\\/g;
@@ -50,12 +81,15 @@ EOF
 /* A wrapper for ikiwiki, can be safely made suid. */
 #include <stdio.h>
 #include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/file.h>
 
 extern char **environ;
-char *newenviron[$#envsave+5];
+char *newenviron[$#envsave+6];
 int i=0;
 
 addenv(char *var, char *val) {
@@ -67,8 +101,10 @@ addenv(char *var, char *val) {
 }
 
 int main (int argc, char **argv) {
-       /* Sanitize environment. */
        char *s;
+
+$check_commit_hook
+$test_receive
 $envsave
        newenviron[i++]="HOME=$ENV{HOME}";
        newenviron[i++]="WRAPPED_OPTIONS=$configstring";