tools/bzl/genrule2.bzl

# Copyright (C) 2016 The Android Open Source Project
#
# 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.

# Syntactic sugar for native genrule() rule:
#   expose ROOT shell variable
#   expose TMP shell variable

def genrule2(cmd, **kwargs):
    cmd = " && ".join([
        "ROOT=$$PWD",
        "TMP=$$(mktemp -d || mktemp -d -t bazel-tmp)",
        "(" + cmd + ")",
    ])
    native.genrule(
        cmd = cmd,
        **kwargs
    )