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# Copyright 2016 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.
"""Rule for importing the docker binary for tests (experimental)."""
def _impl(ctx):
docker = ctx.which("docker")
if docker == None:
# We cannot find docker, we won't be able to run tests depending
# on it, silently ignoring.
ctx.file("BUILD",
"\n".join([
"sh_binary(",
" name = 'docker',",
" srcs = ['docker.sh'],",
" visibility = ['//visibility:public'],",
")"
]))
ctx.file("docker.sh", "\n".join([
"#!/bin/bash",
"echo 'ERROR: docker is not installed' >&2",
"exit 1"
]))
else:
exports = []
for k in ctx.os.environ:
# DOCKER* environment variable are used by the docker client
# to know how to talk to the docker daemon.
if k.startswith("DOCKER"):
exports.append("export %s='%s'" % (k, ctx.os.environ[k]))
ctx.symlink(docker, "docker-bin")
ctx.file("docker.sh", "\n".join([
"#!/bin/bash",
"\n".join(exports),
"""BIN="$0"
while [ -L "${BIN}" ]; do
BIN="$(readlink "${BIN}")"
done
exec "${BIN%%.sh}-bin" "$@"
"""]))
ctx.file("BUILD", "\n".join([
"sh_binary(",
" name = 'docker',",
" srcs = ['docker.sh'],",
" data = [':docker-bin'],",
" visibility = ['//visibility:public'],",
")"]))
docker_repository_ = repository_rule(_impl)
def docker_repository():
"""Declare a @docker repository that provide a docker binary."""
docker_repository_(name = "docker")
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