[NaCl SDK Docs] Simplify PPAPI documentation generation.

native_client_sdk/src/doc/doxygen/rst_index.py

Index: native_client_sdk/src/doc/doxygen/rst_index.py
diff --git a/native_client_sdk/src/doc/doxygen/rst_index.py b/native_client_sdk/src/doc/doxygen/rst_index.py
new file mode 100755
index 0000000000000000000000000000000000000000..2b303c2c74bb38d74d0fd8f6819c9ad63a2f6bf8
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+#!/usr/bin/env python
+# Copyright (c) 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import cStringIO
+import fnmatch
+import optparse
+import os
+import sys
+
+VALID_CHANNELS = ('stable', 'beta', 'dev')
+
+ROOT_FILE_CONTENTS = """.. _pepper_%(channel)s_index:
+
+:orphan:
+
+.. DO NOT EDIT! This document is auto-generated by doxygen/rst_index.py.
+
+########################################
+Pepper API Reference (%(channel_title)s)
+########################################
+
+:ref:`Pepper C API Reference <pepper_%(channel)s_c_index>`
+===========================================================
+
+:ref:`Pepper C++ API Reference <pepper_%(channel)s_cpp_index>`
+===============================================================
+
+"""
+
+C_FILE_CONTENTS = """.. _pepper_%(channel)s_c_index:
+
+.. DO NOT EDIT! This document is auto-generated by doxygen/rst_index.py.
+
+##########################################
+Pepper C API Reference (%(channel_title)s)
+##########################################
+
+`Interfaces <group___interfaces.html>`_
+=======================================
+%(interfaces)s
+
+`Structures <group___structs.html>`_
+====================================
+%(structures)s
+
+`Functions <group___functions.html>`_
+=====================================
+
+`Enums <group___enums.html>`_
+=============================
+
+`Typedefs <group___typedefs.html>`_
+===================================
+
+`Macros <globals_defs.html>`_
+=============================
+
+Files
+=====
+%(files)s
+"""
+
+C_INTERFACE_WILDCARDS =  ['struct_p_p_p__*', 'struct_p_p_b__*']
+
+C_STRUCT_WILDCARDS =  ['struct_p_p__*', 'union_p_p__*']
+
+CPP_FILE_CONTENTS = """.. _pepper_%(channel)s_cpp_index:
+
+.. DO NOT EDIT! This document is auto-generated by doxygen/rst_index.py.
+
+############################################
+Pepper C++ API Reference (%(channel_title)s)
+############################################
+
+`Classes <inherits.html>`_
+==========================
+%(classes)s
+
+Files
+=====
+%(files)s
+"""
+
+CPP_CLASSES_WILDCARDS = ['classpp_1_1*.html']
+CPP_CLASSES_EXCLUDES = ['*-members*']
+
+FILE_WILDCARDS = ['*_8h.html']
+
+
+def GetName(filename):
+  filename = os.path.splitext(filename)[0]
+  out = ''
+  if filename.startswith('struct_p_p_b__'):
+    mangle = filename[7:]  # skip "struct_"
+  elif filename.startswith('struct_p_p_p__'):
+    mangle = filename[7:]  # skip "struct_"
+  elif filename.startswith('struct_p_p__'):
+    mangle = filename[7:]  # skip "struct_"
+  elif filename.startswith('union_p_p__'):
+    mangle = filename[6:]  # skip "union_"
+  elif filename.startswith('classpp_1_1_'):
+    mangle = filename[12:]
+  elif filename.startswith('classpp_1_1ext_1_1_'):
+    out = 'Ext::'      # maybe 'ext::' ?
+    mangle = filename[19:]
+  elif filename.startswith('classpp_1_1internal_1_1_'):
+    out = 'Internal::' # maybe 'internal::'
+    mangle = filename[24:]
+  elif filename.startswith('structpp_1_1internal_1_1_'):
+    out = 'Internal::'
+    mangle = filename[25:]
+  elif filename.endswith('_8h'):
+    return filename[:-3].replace('__', '_') + '.h'
+  else:
+    print 'No match: ' + filename
+  cap = True
+  for c in mangle:
+    if c == '_':
+      if cap:
+        # If cap is True, we've already read one underscore. The second means
+        # that we should insert a literal underscore.
+        cap = False
+      else:
+        cap = True
+        continue
+    if cap:
+      c = c.upper()
+      cap = False
+    out += c
+  return out
+
+
+def GetPath(filepath):
+  if os.path.exists(filepath):
+    return filepath
+  raise OSError('Couldnt find: ' + filepath)
+
+
+def MakeReSTListFromFiles(path, matches, excludes=None):
+  dir_files = os.listdir(path)
+  good_files = []
+  for match in matches:
+    good_files.extend(fnmatch.filter(dir_files, match))
+
+  if excludes:
+    for exclude in excludes:
+      good_files = [filename for filename in good_files
+                    if not fnmatch.fnmatch(filename, exclude)]
+
+  good_files.sort()
+  return '\n'.join('  * `%s <%s>`_\n' % (GetName(f), f) for f in good_files)
+
+
+def MakeTitleCase(s):
+  return s[0].upper() + s[1:]
+
+
+def GenerateRootIndex(channel, out_filename):
+  channel_title = MakeTitleCase(channel)
+
+  # Use StringIO so we don't write out a partial file on error.
+  output = cStringIO.StringIO()
+  output.write(ROOT_FILE_CONTENTS % vars())
+
+  with open(out_filename, 'w') as f:
+    f.write(output.getvalue())
+
+
+def GenerateCIndex(root_dir, channel, out_filename):
+  interfaces = MakeReSTListFromFiles(root_dir, C_INTERFACE_WILDCARDS)
+  structures = MakeReSTListFromFiles(root_dir, C_STRUCT_WILDCARDS)
+  files = MakeReSTListFromFiles(root_dir, FILE_WILDCARDS)
+  channel_title = MakeTitleCase(channel)
+
+  # Use StringIO so we don't write out a partial file on error.
+  output = cStringIO.StringIO()
+  output.write(C_FILE_CONTENTS % vars())
+
+  with open(out_filename, 'w') as f:
+    f.write(output.getvalue())
+
+
+def GenerateCppIndex(root_dir, channel, out_filename):
+  classes = MakeReSTListFromFiles(root_dir, CPP_CLASSES_WILDCARDS,
+                                  CPP_CLASSES_EXCLUDES)
+  files = MakeReSTListFromFiles(root_dir, FILE_WILDCARDS)
+  channel_title = MakeTitleCase(channel)
+
+  # Use StringIO so we don't write out a partial file on error.
+  output = cStringIO.StringIO()
+  output.write(CPP_FILE_CONTENTS % vars())
+
+  with open(out_filename, 'w') as f:
+    f.write(output.getvalue())
+
+
+def main(argv):
+  usage = 'Usage: %prog [options] <--root|--c|--cpp> directory'
+  parser = optparse.OptionParser(usage=usage)
+  parser.add_option('--channel', help='pepper channel (stable, beta, dev)')
+  parser.add_option('--root', help='Generate root API index',
+                    action='store_true', default=False)
+  parser.add_option('--c', help='Generate C API index', action='store_true',
+                    default=False)
+  parser.add_option('--cpp', help='Generate C++ API index', action='store_true',
+                    default=False)
+  parser.add_option('-o', '--output', help='output file.')
+  options, files = parser.parse_args(argv)
+
+  if len(files) != 1:
+    parser.error('Expected one directory')
+
+  if not options.output:
+    parser.error('Need output file')
+
+  if options.channel not in VALID_CHANNELS:
+    parser.error('Expected channel to be one of %s' % ', '.join(VALID_CHANNELS))
+
+  if sum((options.c, options.cpp, options.root)) != 1:
+    parser.error('Exactly one of --c/--cpp/--root flags is required.')
+
+  root_dir = files[0]
+
+  if options.c:
+    GenerateCIndex(root_dir, options.channel, options.output)
+  elif options.cpp:
+    GenerateCppIndex(root_dir, options.channel, options.output)
+  elif options.root:
+    GenerateRootIndex(options.channel, options.output)
+  else:
+    assert(False)
+  return 0
+
+
+if __name__ == '__main__':
+  try:
+    rtn = main(sys.argv[1:])
+  except KeyboardInterrupt:
+    sys.stderr.write('%s: interrupted\n' % os.path.basename(__file__))
+    rtn = 1
+  sys.exit(rtn)