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# Copyright 2020 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.
"""Repository rule to autoconfigure a toolchain using the system rpmbuild."""
def _write_build(rctx, path, version):
if not path:
path = ""
rctx.template(
"BUILD",
Label("//toolchains/rpm:BUILD.tpl"),
substitutions = {
"{GENERATOR}": "@rules_pkg//toolchains/rpm/rpmbuild_configure.bzl%find_system_rpmbuild",
"{RPMBUILD_PATH}": str(path),
"{RPMBUILD_VERSION}": version,
},
executable = False,
)
def _find_system_rpmbuild_impl(rctx):
rpmbuild_path = rctx.which("rpmbuild")
if rctx.attr.verbose:
if rpmbuild_path:
print("Found rpmbuild at '%s'" % rpmbuild_path) # buildifier: disable=print
else:
print("No system rpmbuild found.") # buildifier: disable=print
version = "unknown"
if rpmbuild_path:
res = rctx.execute([rpmbuild_path, "--version"])
if res.return_code == 0:
# expect stdout like: RPM version 4.16.1.2
parts = res.stdout.strip().split(" ")
if parts[0] == "RPM" and parts[1] == "version":
version = parts[2]
_write_build(rctx = rctx, path = rpmbuild_path, version = version)
_find_system_rpmbuild = repository_rule(
implementation = _find_system_rpmbuild_impl,
doc = """Create a repository that defines an rpmbuild toolchain based on the system rpmbuild.""",
local = True,
environ = ["PATH"],
attrs = {
"verbose": attr.bool(
doc = "If true, print status messages.",
),
},
)
def find_system_rpmbuild(name, verbose=False):
_find_system_rpmbuild(name=name, verbose=verbose)
native.register_toolchains(
"@%s//:rpmbuild_auto_toolchain" % name,
"@rules_pkg//toolchains/rpm:rpmbuild_missing_toolchain")
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