Stub documentation for some gRPC Core modules

templates/tools/doxygen/Doxyfile.include

@@ -9,6 +9,7 @@
 <%
   import itertools
   import glob
+  import os
   targets = []
   docpackage = packagename.replace('+', 'p').lower()
   for libname in libnames:
@@ -18,6 +19,11 @@
         target = p
     assert(target)
     targets.append(target)
+  srcdoc = []
+  for dirpath, dirnames, filenames in os.walk('src/%s' % docpackage):
+    for filename in filenames:
+      if os.path.splitext(filename)[1] == '.md':
+        srcdoc.append(os.path.join(dirpath, filename))
 %>
 # Doxyfile 1.8.9.1
 
@@ -790,7 +796,8 @@ INPUT                  = ${
     				     else target.headers + target.src)
     			      for target in targets),
             glob.glob('doc/*.md'),
-            glob.glob('doc/%s/*.md' % docpackage))
+            glob.glob('doc/%s/*.md' % docpackage),
+            [] if not internal else srcdoc)
     )
 }
 

tools/doxygen/Doxyfile.c++.internal

@@ -921,7 +921,8 @@ doc/interop-test-descriptions.md \
 doc/statuscodes.md \
 doc/g_stands_for.md \
 doc/cpp/perf_notes.md \
-doc/cpp/pending_api_cleanups.md
+doc/cpp/pending_api_cleanups.md \
+src/cpp/README.md
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses

tools/doxygen/Doxyfile.core.internal

@@ -1303,7 +1303,28 @@ doc/server-reflection.md \
 doc/interop-test-descriptions.md \
 doc/statuscodes.md \
 doc/g_stands_for.md \
-doc/core/pending_api_cleanups.md
+doc/core/pending_api_cleanups.md \
+src/core/README.md \
+src/core/ext/README.md \
+src/core/ext/transport/README.md \
+src/core/ext/transport/chttp2/README.md \
+src/core/ext/transport/chttp2/client/secure/README.md \
+src/core/ext/transport/chttp2/client/insecure/README.md \
+src/core/ext/transport/chttp2/transport/README.md \
+src/core/ext/transport/chttp2/server/secure/README.md \
+src/core/ext/transport/chttp2/server/insecure/README.md \
+src/core/ext/client_channel/README.md \
+src/core/ext/resolver/README.md \
+src/core/ext/resolver/sockaddr/README.md \
+src/core/ext/resolver/dns/native/README.md \
+src/core/ext/census/README.md \
+src/core/ext/census/gen/README.md \
+src/core/lib/README.md \
+src/core/lib/tsi/README.md \
+src/core/lib/channel/README.md \
+src/core/lib/transport/README.md \
+src/core/lib/iomgr/README.md \
+src/core/lib/surface/README.md
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses