mirror of
https://github.com/bazelbuild/bazel-skylib
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93 lines
3.1 KiB
Python
93 lines
3.1 KiB
Python
# Copyright 2019 The Bazel Authors. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""native_binary() and native_test() rule implementations.
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These rules let you wrap a pre-built binary or script in a conventional binary
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and test rule respectively. They fulfill the same goal as sh_binary and sh_test
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do, but they run the wrapped binary directly, instead of through Bash, so they
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don't depend on Bash and work with --shell_executable="".
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"""
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def _impl_rule(ctx):
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out = ctx.actions.declare_file(ctx.attr.out)
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ctx.actions.symlink(
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target_file = ctx.executable.src,
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output = out,
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is_executable = True,
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)
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runfiles = ctx.runfiles(files = ctx.files.data)
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# Bazel 4.x LTS does not support `merge_all`.
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# TODO: remove `merge` branch once we drop support for Bazel 4.x.
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if hasattr(runfiles, "merge_all"):
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runfiles = runfiles.merge_all([
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d[DefaultInfo].default_runfiles
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for d in ctx.attr.data + [ctx.attr.src]
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])
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else:
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for d in ctx.attr.data:
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runfiles = runfiles.merge(d[DefaultInfo].default_runfiles)
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runfiles = runfiles.merge(ctx.attr.src[DefaultInfo].default_runfiles)
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return DefaultInfo(
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executable = out,
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files = depset([out]),
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runfiles = runfiles,
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)
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_ATTRS = {
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"src": attr.label(
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executable = True,
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# This must be used instead of `allow_single_file` because otherwise a
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# target with multiple default outputs (e.g. py_binary) would not be
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# allowed.
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allow_files = True,
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mandatory = True,
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cfg = "target",
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doc = "path of the pre-built executable",
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),
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"data": attr.label_list(
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allow_files = True,
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doc = "data dependencies. See" +
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" https://bazel.build/reference/be/common-definitions#typical.data",
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),
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# "out" is attr.string instead of attr.output, so that it is select()'able.
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"out": attr.string(mandatory = True, doc = "An output name for the copy of the binary"),
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}
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native_binary = rule(
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implementation = _impl_rule,
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attrs = _ATTRS,
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executable = True,
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doc = """
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Wraps a pre-built binary or script with a binary rule.
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You can "bazel run" this rule like any other binary rule, and use it as a tool
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in genrule.tools for example. You can also augment the binary with runfiles.
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""",
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)
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native_test = rule(
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implementation = _impl_rule,
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attrs = _ATTRS,
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test = True,
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doc = """
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Wraps a pre-built binary or script with a test rule.
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You can "bazel test" this rule like any other test rule. You can also augment
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the binary with runfiles.
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""",
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)
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