src/embedded_tools.bzl

# pylint: disable=g-bad-file-header
# Copyright 2017 The Bazel 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.
"""Contains Starlark rules used to build the embedded_tools.zip."""

def _embedded_tools(ctx):
    # The list of arguments we pass to the script.
    args_file = ctx.actions.declare_file(ctx.label.name + ".params")
    ctx.actions.write(output = args_file, content = "\n".join([f.path for f in ctx.files.srcs]))

    # Action to call the script.
    ctx.actions.run(
        inputs = ctx.files.srcs,
        outputs = [ctx.outputs.out],
        arguments = [ctx.outputs.out.path, args_file.path],
        progress_message = "Creating embedded tools: %s" % ctx.outputs.out.short_path,
        executable = ctx.executable.tool,
    )

embedded_tools = rule(
    implementation = _embedded_tools,
    attrs = {
        "srcs": attr.label_list(allow_files = True),
        "out": attr.output(mandatory = True),
        "tool": attr.label(
            executable = True,
            cfg = "host",
            allow_files = True,
            default = Label("//src:create_embedded_tools_sh"),
        ),
    },
)

def _srcsfile(ctx):
    ctx.actions.write(
        output = ctx.outputs.out,
        content = "\n".join([f.path for f in ctx.files.srcs]),
    )

srcsfile = rule(
    implementation = _srcsfile,
    attrs = {
        "srcs": attr.label_list(allow_files = True),
        "out": attr.output(mandatory = True),
    },
)