meson: fix website target

A number of pages don't actually exist as html inside the source tree,
and need to be generated even though they are manpages.

This caused the website.tar.gz target to only work inside a dirty tree
initially created by autotools.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>

doc/meson.build

@@ -14,6 +14,13 @@ manpages = [
   { 'name': 'BUILDINFO.5' },
 ]
 
+sitepages = [
+  { 'name': 'submitting-patches' },
+  { 'name': 'translation-help' },
+  { 'name': 'HACKING', 'source': '../HACKING' },
+  { 'name': 'index' },
+]
+
 asciidoc_conf = join_paths(meson.current_source_dir(), 'asciidoc.conf')
 
 asciidoc_opts = [
@@ -58,6 +65,12 @@ foreach page : manpages
     install : true,
     install_dir : mandirn,
   )
+endforeach
+
+foreach page: manpages + sitepages
+  manpage = page['name']
+  htmlpage = '@0@.html'.format(manpage)
+  input = page.get('source', '@0@.asciidoc'.format(manpage))
 
   html = custom_target(
     htmlpage,
@@ -96,10 +109,6 @@ custom_target(
     '-C', meson.current_build_dir(),
   ] + html_files + [
     '-C', meson.current_source_dir(),
-    'submitting-patches.html',
-    'translation-help.html',
-    'HACKING.html',
-    'index.html',
     'asciidoc-override.css',
     '-C', '/etc/asciidoc/stylesheets/',
     'asciidoc.css',