Expand markdown in content filesmarkdown-content

Here is a quick proof-of-concept patch to recognize
.md files in expand_content_files, and run ConvertMarkDown
on them. It is not quite as useful as I had hoped, since
gtk-doc's markdown support is so limited. And it insists
on emitting <refsect2> elements. But its a start.

I tested this by putting test.md in expand_content_files,
and then have this in my main xml:
    <refentry>
      <refmeta><refentrytitle>Test</refentrytitle></refmeta>
      <refnamediv><refpurpose>markdown</refpurpose></refnamediv>
      <xi:include href="xml/test.md" />
    </refentry>

1 files changed, 4 insertions, 1 deletions

diff --git a/gtkdoc/mkdb.py b/gtkdoc/mkdb.py
index 9404452..2ad2008 100644
--- a/gtkdoc/mkdb.py
+++ b/gtkdoc/mkdb.py
@@ -2381,7 +2381,10 @@ def OutputExtraFile(file):
     contents = open(file, 'r', encoding='utf-8').read()
 
     with open(new_db_file, 'w', encoding='utf-8') as out:
-        out.write(ExpandAbbreviations(basename + " file", contents))
+        if old_db_file.endswith(".md"):
+            out.write(ConvertMarkDown(basename + " file", contents))
+        else:
+           out.write(ExpandAbbreviations(basename + " file", contents))
 
     return common.UpdateFileIfChanged(old_db_file, new_db_file, 0)