Adding check that all public modules are documented.

Fixes googleapis#714.

scripts/run_pylint.py

@@ -21,6 +21,8 @@
 violations (hence it has a reduced number of style checks).
 """
 
+from __future__ import print_function
+
 import ConfigParser
 import copy
 import os
@@ -212,7 +214,7 @@ def lint_fileset(filenames, rcfile, description):
         if status_code != 0:
             error_message = ('Pylint failed on %s with '
                              'status %d.' % (description, status_code))
-            print >> sys.stderr, error_message
+            print(error_message, file=sys.stderr)
             sys.exit(status_code)
     else:
         print 'Skipping %s, no files to lint.' % (description,)
@@ -230,7 +232,7 @@ def main():
             raise
 
         message = 'Restricted lint failed, expanding to full fileset.'
-        print >> sys.stderr, message
+        print(message, file=sys.stderr)
         all_files, _ = get_files_for_linting(allow_limited=False)
         library_files, non_library_files, _ = get_python_files(
             all_files=all_files)

scripts/verify_included_modules.py

@@ -0,0 +1,135 @@
+# Copyright 2016 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Check if all public modules are included in our docs."""
+
+
+from __future__ import print_function
+
+import os
+import sys
+import warnings
+
+from sphinx.ext.intersphinx import fetch_inventory
+
+
+BASE_DIR = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), '..'))
+DOCS_DIR = os.path.join(BASE_DIR, 'docs')
+OBJECT_INVENTORY_RELPATH = os.path.join('_build', 'html', 'objects.inv')
+IGNORED_PREFIXES = ('test_', '_')
+IGNORED_MODULES = frozenset([
+    'gcloud.bigquery.query',
+    'gcloud.bigtable.client',
+    'gcloud.bigtable.cluster',
+    'gcloud.bigtable.column_family',
+    'gcloud.bigtable.happybase.connection',
+    'gcloud.bigtable.row',
+    'gcloud.bigtable.table',
+    'gcloud.datastore.demo.demo',
+    'gcloud.demo',
+    'gcloud.storage.demo.demo',
+])
+
+
+class SphinxApp(object):
+    """Mock app to interact with Sphinx helpers."""
+    warn = warnings.warn
+    srcdir = DOCS_DIR
+
+
+def is_valid_module(filename):
+    """Determines if a filename is a valid Python module.
+
+    Assumes if is just the end of a path (i.e. does not contain
+    ``os.path.sep``.
+
+    :type filename: string
+    :param filename: The name of a file.
+
+    :rtype: bool
+    :returns: Flag indicating if the filename is valid.
+    """
+    if not filename.endswith('.py'):
+        return False
+    for prefix in IGNORED_PREFIXES:
+        if filename.startswith(prefix):
+            return False
+    return True
+
+
+def get_public_modules(path, base_package=None):
+    """Get list of all public modules relative to a path.
+
+    :type path: string
+    :param path: The path containing the python modules.
+
+    :type base_package: string
+    :param base_package: (Optional) A package to prepend in
+                         front of the path.
+
+    :rtype: list
+    :returns: List of all modules found.
+    """
+    result = []
+    for subdir, _, files in os.walk(path):
+        # Skip folders that start with _.
+        if any([part.startswith('_')
+                for part in subdir.split(os.path.sep)]):
+            continue
+        _, rel_dir = subdir.split(path)
+        rel_dir = rel_dir.lstrip(os.path.sep)
+        for filename in files:
+            if is_valid_module(filename):
+                mod_name, _ = os.path.splitext(filename)
+                rel_path = os.path.join(rel_dir, mod_name)
+                if base_package is not None:
+                    rel_path = os.path.join(base_package, rel_path)
+                # Turn into a Python module rather than a file path.
+                result.append(rel_path.replace(os.path.sep, '.'))
+
+    return result
+
+
+def main():
+    """Main script to verify modules included."""
+    mock_uri = ''
+    inventory = fetch_inventory(SphinxApp, mock_uri,
+                                OBJECT_INVENTORY_RELPATH)
+    sphinx_mods = set(inventory['py:module'].keys())
+
+    library_dir = os.path.join(BASE_DIR, 'gcloud')
+    public_mods = get_public_modules(library_dir,
+                                     base_package='gcloud')
+    public_mods = set(public_mods)
+
+    if not sphinx_mods <= public_mods:
+        message = ('Unexpected error. There were modules referenced by '
+                   'Sphinx that are not among the public modules.')
+        print(message, file=sys.stderr)
+        sys.exit(1)
+
+    undocumented_mods = public_mods - sphinx_mods
+    # Remove ignored modules.
+    undocumented_mods -= IGNORED_MODULES
+    if undocumented_mods:
+        message_parts = ['Found undocumented public modules:']
+        message_parts.extend(['- ' + mod_name
+                              for mod_name in sorted(undocumented_mods)])
+        print('\n'.join(message_parts), file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()

tox.ini

@@ -45,6 +45,7 @@ basepython =
 commands =
     python -c "import shutil; shutil.rmtree('docs/_build', ignore_errors=True)"
     sphinx-build -W -b html -d docs/_build/doctrees docs docs/_build/html
+    python {toxinidir}/scripts/verify_included_modules.py
 deps =
     Sphinx
 passenv = {[testenv:system-tests]passenv} SPHINX_RELEASE READTHEDOCS LOCAL_RTD
@@ -57,6 +58,7 @@ basepython = {[testenv:docs]basepython}
 commands =
     python -c "import shutil; shutil.rmtree('docs/_build_rtd', ignore_errors=True)"
     sphinx-build -W -b html -d docs/_build_rtd/doctrees docs docs/_build_rtd/html
+    python {toxinidir}/scripts/verify_included_modules.py
 deps = {[testenv:docs]deps}
 passenv = {[testenv:docs]passenv}