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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.
"""Quick and not really nice docker_pull rules based on the docker daemon."""
def _impl(repository_ctx):
docker = repository_ctx.which("docker")
if docker == None and repository_ctx.attr.optional:
repository_ctx.file("BUILD", """
load("@bazel_tools//tools/build_defs/docker:docker.bzl", "docker_build")
# an empty image to still allow building despite not having the base
# image.
docker_build(
name = "image",
visibility = ['//visibility:public'],
)
""")
repository_ctx.file("image.tar")
return
repository_ctx.file("BUILD", """
load("@bazel_tools//tools/build_defs/docker:docker.bzl", "docker_build")
docker_build(
name = "image",
base = ":base.tar",
visibility = ["//visibility:public"],
)
""")
tag = repository_ctx.attr.tag
cmd = "pull"
if repository_ctx.attr.dockerfile:
dockerfile = repository_ctx.path(repository_ctx.attr.dockerfile)
cmd = "build"
print("Running `docker build`")
result = repository_ctx.execute([
docker,
"build",
"-q",
"-t",
tag,
"-f",
dockerfile,
dockerfile.dirname,
], quiet=False, timeout=3600)
else:
print("Running `docker pull`")
result = repository_ctx.execute([docker, "pull", tag], quiet=False, timeout=3600)
if result.return_code:
fail("docker %s failed with error code %s:\n%s" % (
cmd,
result.return_code,
result.stderr))
result = repository_ctx.execute([
docker, "save", "-o", repository_ctx.path("base.tar"), tag])
if result.return_code:
fail("docker save failed with error code %s:\n%s" % (
result.return_code,
result.stderr))
docker_pull = repository_rule(
implementation = _impl,
attrs = {
"tag": attr.string(mandatory=True),
"dockerfile": attr.label(default=None),
"optional": attr.bool(default=False),
},
)
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