clean up use of IkiWiki::Receive

Loading and use of IkiWiki::Receive can all be pushed into the git plugin,
rather than scattered around.

I had at first wanted to make a receive plugin and move it there,
but a plugin was not a good fit; you don't want users to have to manually
load it, and making the git plugin load the receive plugin at the right
times would need more, and ugly code.

IkiWiki/Plugin/git.pm

@@ -14,6 +14,7 @@ my $no_chdir=0;
 sub import {
 	hook(type => "checkconfig", id => "git", call => \&checkconfig);
 	hook(type => "getsetup", id => "git", call => \&getsetup);
+	hook(type => "genwrapper", id => "git", call => \&genwrapper);
 	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);
@@ -41,6 +42,7 @@ sub checkconfig () {
 			wrappermode => (defined $config{git_wrappermode} ? $config{git_wrappermode} : "06755"),
 		};
 	}
+
 	if (defined $config{git_test_receive_wrapper} &&
 	    length $config{git_test_receive_wrapper}) {
 		push @{$config{wrappers}}, {
@@ -49,6 +51,13 @@ sub checkconfig () {
 			wrappermode => (defined $config{git_wrappermode} ? $config{git_wrappermode} : "06755"),
 		};
 	}
+	
+	# Run receive test only if being called by the wrapper, and not
+	# when generating same.
+	if ($config{test_receive} && ! exists $config{wrapper}) {
+		require IkiWiki::Receive;
+		IkiWiki::Receive::test();
+	}
 }
 
 sub getsetup () {
@@ -115,6 +124,16 @@ sub getsetup () {
 		},
 }
 
+sub genwrapper {
+	if ($config{test_receive}) {
+		require IkiWiki::Receive;
+		return IkiWiki::Receive::genwrapper();
+	}
+	else {
+		return "";
+	}
+}
+
 sub safe_git (&@) {
 	# Start a child process safely without resorting /bin/sh.
 	# Return command output or success state (in scalar context).

IkiWiki/Receive.pm

@@ -1,5 +1,4 @@
 #!/usr/bin/perl
-
 package IkiWiki::Receive;
 
 use warnings;
@@ -20,9 +19,9 @@ sub trusted () {
 		! grep { $_ eq $user } @{$config{untrusted_committers}};
 }
 
-sub gen_wrapper () {
+sub genwrapper () {
 	# Test for commits from untrusted committers in the wrapper, to
-	# avoid loading ikiwiki at all for trusted commits.
+	# avoid starting ikiwiki proper at all for trusted commits.
 
 	my $ret=<<"EOF";
 	{
@@ -37,6 +36,8 @@ EOF
 			"u != $uid";
 		} @{$config{untrusted_committers}}).
 		") exit(0);\n";
+
+	
 	$ret.=<<"EOF";
 		asprintf(&s, "CALLER_UID=%i", u);
 		newenviron[i++]=s;

IkiWiki/Wrapper.pm

@@ -37,10 +37,6 @@ sub gen_wrapper () {
 		addenv("$var", s);
 EOF
 	}
-
-	if ($config{test_receive}) {
-		require IkiWiki::Receive;
-	}
 	
 	my @wrapper_hooks;
 	run_hooks(genwrapper => sub { push @wrapper_hooks, shift->() });

ikiwiki.in

@@ -190,10 +190,6 @@ sub main () {
 	elsif ($config{post_commit} && ! commit_hook_enabled()) {
 		# do nothing
 	}
-	elsif ($config{test_receive}) {
-		require IkiWiki::Receive;
-		IkiWiki::Receive::test();
-	}
 	else {
 		if ($config{rebuild}) {
 			debug(gettext("rebuilding wiki.."));