zipper.bzl

# Copyright 2017 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.

"""Rule for zipping Webfiles."""

load("@io_bazel_rules_closure//closure/private:defs.bzl", "unfurl")

def _tensorboard_zip_file(ctx):
  deps = unfurl(ctx.attr.deps, provider="webfiles")
  manifests = depset(order="postorder")
  files = depset()
  webpaths = depset()
  for dep in deps:
    manifests = depset(transitive=[manifests, dep.webfiles.manifests])
    webpaths = depset(transitive=[webpaths, dep.webfiles.webpaths])
    files = depset(transitive=[files, dep.data_runfiles.files])
  ctx.actions.run(
      mnemonic="Zipper",
      inputs=depset(transitive=[manifests, files]).to_list(),
      outputs=[ctx.outputs.zip],
      executable=ctx.executable._Zipper,
      arguments=([ctx.outputs.zip.path] +
                 [m.path for m in manifests.to_list()]),
      progress_message="Zipping %d files" % len(webpaths.to_list()))
  transitive_runfiles = depset()
  for dep in deps:
    transitive_runfiles = depset(transitive=[
        transitive_runfiles,
        dep.data_runfiles.files,
    ])
  return struct(
      files=depset([ctx.outputs.zip]),
      runfiles=ctx.runfiles(
          files=ctx.files.data + [ctx.outputs.zip],
          transitive_files=transitive_runfiles))

tensorboard_zip_file = rule(
    implementation=_tensorboard_zip_file,
    attrs={
        "data": attr.label_list(allow_files=True),
        "deps": attr.label_list(providers=["webfiles"], mandatory=True),
        "_Zipper": attr.label(
            default=Label("//tensorboard/java/org/tensorflow/tensorboard/vulcanize:Zipper"),
            executable=True,
            cfg="host"),
    },
    outputs={
        "zip": "%{name}.zip",
    })