k3s/build/go.bzl

104 lines
3.2 KiB
Python

# Copyright 2019 The Kubernetes Authors.
#
# 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.
load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_test")
# Defines several go_binary rules to work around a Bazel issue which makes
# the pure attribute on go_binary not configurable.
# The name provided will have cgo enabled if targeting Linux, and will
# be a pure go binary otherwise. Additionally, if targeting Windows, the
# output filename will have a .exe suffix.
def go_binary_conditional_pure(name, tags = None, **kwargs):
tags = tags or []
tags.append("manual")
go_binary(
name = "_%s-cgo" % name,
out = name,
pure = "off",
tags = tags,
**kwargs
)
# Define a rule for both Unix and Windows exe suffixes.
[go_binary(
name = "_%s-pure" % out,
out = out,
pure = "on",
tags = tags,
**kwargs
) for out in [name, name + ".exe"]]
# The real magic, where we work around the pure attribute not being
# configurable: select the appropriate go_binary rule above based on the
# configured platform.
native.alias(
name = name,
actual = select({
"@io_bazel_rules_go//go/platform:linux": ":_%s-cgo" % name,
"@io_bazel_rules_go//go/platform:windows": ":_%s.exe-pure" % name,
"//conditions:default": ":_%s-pure" % name,
}),
)
# Defines several go_test rules to work around a Bazel issue which makes
# the pure attribute on go_test not configurable.
# This also defines genrules to produce test binaries named ${out} and
# ${out}.exe, and an alias named ${out}_binary which automatically selects
# the correct filename suffix (i.e. with a .exe on Windows).
def go_test_conditional_pure(name, out, tags = None, **kwargs):
tags = tags or []
tags.append("manual")
go_test(
name = "_%s-cgo" % name,
pure = "off",
testonly = False,
tags = tags,
**kwargs
)
go_test(
name = "_%s-pure" % name,
pure = "on",
testonly = False,
tags = tags,
**kwargs
)
native.alias(
name = name,
actual = select({
"@io_bazel_rules_go//go/platform:linux": ":_%s-cgo" % name,
"//conditions:default": ":_%s-pure" % name,
}),
)
[native.genrule(
name = "gen_%s" % o,
srcs = [name],
outs = [o],
cmd = "cp $< $@;",
output_to_bindir = True,
executable = True,
tags = tags,
) for o in [out, out + ".exe"]]
native.alias(
name = "%s_binary" % out,
actual = select({
"@io_bazel_rules_go//go/platform:windows": ":gen_%s.exe" % out,
"//conditions:default": ":gen_%s" % out,
}),
)