Add docs generation script. (#192)

* Add docs generation script.

* overlay files from tensorflow-core-api/src/gen/java/org/tensorflow

Author: MarkDaoust

tools/build_java_api_docs.py

@@ -0,0 +1,83 @@
+# Lint as: python3
+# Copyright 2020 The TensorFlow Authors. 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.
+# ==============================================================================
+"""Generate TensorFlow Lite Java reference docs for TensorFlow.org."""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import pathlib
+import shutil
+import tempfile
+
+from absl import app
+from absl import flags
+
+from tensorflow_docs.api_generator import gen_java
+
+FLAGS = flags.FLAGS
+
+# These flags are required by infrastructure, not all of them are used.
+flags.DEFINE_string('output_dir', '/tmp/java_api/',
+                    ("Use this branch as the root version and don't"
+                     ' create in version directory'))
+
+flags.DEFINE_string('site_path', 'java/api_docs/java',
+                    'Path prefix in the _toc.yaml')
+
+flags.DEFINE_string('code_url_prefix', None,
+                    '[UNUSED] The url prefix for links to code.')
+
+flags.DEFINE_bool(
+    'search_hints', True,
+    '[UNUSED] Include metadata search hints in the generated files')
+
+# __file__ is the path to this file
+TOOLS_DIR = pathlib.Path(__file__).resolve().parent
+REPO_ROOT = TOOLS_DIR.parent
+
+def overlay(from_root, to_root):
+  for from_path in pathlib.Path(from_root).rglob('*'):
+    relpath = from_path.relative_to(from_root)
+    to_path = to_root/relpath
+    if from_path.is_file():
+      assert not to_path.exists()
+      shutil.copyfile(from_path, to_path)
+    else:
+      to_path.mkdir(exist_ok=True)
+
+def main(unused_argv):
+  merged_source = pathlib.Path(tempfile.mkdtemp())
+  (merged_source / 'java/org').mkdir(parents=True)
+
+  shutil.copytree(REPO_ROOT/'tensorflow-core/tensorflow-core-api/src/main/java/org/tensorflow/',
+                  merged_source/'java/org/tensorflow')
+  overlay(REPO_ROOT/'tensorflow-core/tensorflow-core-api/src/gen/java/org/tensorflow',
+            merged_source/'java/org/tensorflow')
+  shutil.copytree(REPO_ROOT/'tensorflow-framework/src/main/java/org/tensorflow/framework',
+                  merged_source/'java/org/tensorflow/framework')
+  shutil.copytree(REPO_ROOT/'ndarray/src/main/java/org/tensorflow/ndarray',
+                  merged_source/'java/org/tensorflow/ndarray')
+
+  gen_java.gen_java_docs(
+      package='org.tensorflow',
+      source_path=merged_source / 'java',
+      output_dir=pathlib.Path(FLAGS.output_dir),
+      site_path=pathlib.Path(FLAGS.site_path))
+
+
+if __name__ == '__main__':
+  flags.mark_flags_as_required(['output_dir'])
+  app.run(main)