I tested it briefly with `test.java` and `test.mdwn` just to see what would happen. Things got quite strange. The source-highlighting plugin was called (probably for the java file), but then when it calls `pagetype($pagesources{$page})` to figure out the file type, that function returns `mdwn`, which confuses things somewhat.
+> This is a known possible point of confusion. If there are multiple source
+> files, it will render them both, in an arbitrary sequence, so one "wins".
+> --[[Joey]]
+
Anyway, I'm thinking about possible solutions. The best option I've come up with so far is: when registering an htmlize hook, add a new optional paramter 'keep_extension'. This would make a source file of `hello.c` generate a page with name `hello.c` rather than the current `hello`. This would keep the pages unique (until someone makes `hello.c.mdwn`...).
Suggestions welcome.
-- [[Will]]
+
+> Ok, this turned out not to be a hard change. [[patch]] is below. With this patch you can tell IkiWiki not to drop the suffix when you register a hook: `hook(type => "htmlize", id => $lang, call => \&htmlize, leavesuffix => 1);`
+
+>> I think that's a good solution to the problem that most syntax plugins
+>> have struggled with. It makes sense. It doesn't solve the case where
+>> you have source files without any extension (eg `Makefile`), but at
+>> least it covers the common cases.
+>>
+>> I'm going to be annoying and call it "keepextension", otherwise, applied
+>> as-is. --[[Joey]] [[done]]
+
+ diff --git a/IkiWiki.pm b/IkiWiki.pm
+ index 4e4da11..853f905 100644
+ --- a/IkiWiki.pm
+ +++ b/IkiWiki.pm
+ @@ -618,7 +618,7 @@ sub pagename ($) { #{{{
+
+ my $type=pagetype($file);
+ my $page=$file;
+ - $page=~s/\Q.$type\E*$// if defined $type;
+ + $page=~s/\Q.$type\E*$// if defined $type && !$hooks{htmlize}{$type}{leavesuffix};
+ return $page;
+ } #}}}
+
+ diff --git a/t/pagename.t b/t/pagename.t
+ index 96e6a87..58811b9 100755
+ --- a/t/pagename.t
+ +++ b/t/pagename.t
+ @@ -6,7 +6,7 @@ use Test::More tests => 5;
+ BEGIN { use_ok("IkiWiki"); }
+
+ # Used internally.
+ -$IkiWiki::hooks{htmlize}{mdwn}=1;
+ +$IkiWiki::hooks{htmlize}{mdwn}{call}=1;
+
+ is(pagename("foo.mdwn"), "foo");
+ is(pagename("foo/bar.mdwn"), "foo/bar");
+
+----
+
+I wonder if this patch will also be useful:
+
+> Reasonable, applied.
+
+ diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
+ index 752d176..3f1b67b 100644
+ --- a/IkiWiki/Render.pm
+ +++ b/IkiWiki/Render.pm
+ @@ -279,7 +279,11 @@ sub refresh () { #{{{
+ else {
+ $f=~s/^\Q$config{srcdir}\E\/?//;
+ push @files, $f;
+ - $exists{pagename($f)}=1;
+ + my $pagename = pagename($f);
+ + if ($exists{$pagename}) {
+ + warn(sprintf(gettext("Page %s has multiple possible source pages"), $pagename)."\n");
+ + }
+ + $exists{$pagename}=1;
+ }
+ }
+ },