101 lines
3.4 KiB
Python
101 lines
3.4 KiB
Python
# Copyright 2019 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.
|
|
|
|
"""Common build setting rules
|
|
|
|
These rules return a BuildSettingInfo with the value of the build setting.
|
|
For label-typed settings, use the native label_flag and label_setting rules.
|
|
|
|
More documentation on how to use build settings at
|
|
https://docs.bazel.build/versions/master/skylark/config.html#user-defined-build-settings
|
|
"""
|
|
|
|
BuildSettingInfo = provider(
|
|
doc = "A singleton provider that contains the raw value of a build setting",
|
|
fields = {
|
|
"value": "The value of the build setting in the current configuration. " +
|
|
"This value may come from the command line or an upstream transition, " +
|
|
"or else it will be the build setting's default.",
|
|
},
|
|
)
|
|
|
|
def _impl(ctx):
|
|
return BuildSettingInfo(value = ctx.build_setting_value)
|
|
|
|
int_flag = rule(
|
|
implementation = _impl,
|
|
build_setting = config.int(flag = True),
|
|
doc = "An int-typed build setting that can be set on the command line",
|
|
)
|
|
|
|
int_setting = rule(
|
|
implementation = _impl,
|
|
build_setting = config.int(),
|
|
doc = "An int-typed build setting that cannot be set on the command line",
|
|
)
|
|
|
|
bool_flag = rule(
|
|
implementation = _impl,
|
|
build_setting = config.bool(flag = True),
|
|
doc = "A bool-typed build setting that can be set on the command line",
|
|
)
|
|
|
|
bool_setting = rule(
|
|
implementation = _impl,
|
|
build_setting = config.bool(),
|
|
doc = "A bool-typed build setting that cannot be set on the command line",
|
|
)
|
|
|
|
string_list_flag = rule(
|
|
implementation = _impl,
|
|
build_setting = config.string_list(flag = True),
|
|
doc = "A string list-typed build setting that can be set on the command line",
|
|
)
|
|
|
|
string_list_setting = rule(
|
|
implementation = _impl,
|
|
build_setting = config.string_list(),
|
|
doc = "A string list-typed build setting that cannot be set on the command line",
|
|
)
|
|
|
|
def _string_impl(ctx):
|
|
allowed_values = ctx.attr.values
|
|
value = ctx.build_setting_value
|
|
if len(allowed_values) == 0 or value in ctx.attr.values:
|
|
return BuildSettingInfo(value = value)
|
|
else:
|
|
fail("Error setting " + str(ctx.label) + ": invalid value '" + value + "'. Allowed values are " + str(allowed_values))
|
|
|
|
string_flag = rule(
|
|
implementation = _string_impl,
|
|
build_setting = config.string(flag = True),
|
|
attrs = {
|
|
"values": attr.string_list(
|
|
doc = "The list of allowed values for this setting. An error is raised if any other value is given.",
|
|
),
|
|
},
|
|
doc = "A string-typed build setting that can be set on the command line",
|
|
)
|
|
|
|
string_setting = rule(
|
|
implementation = _string_impl,
|
|
build_setting = config.string(),
|
|
attrs = {
|
|
"values": attr.string_list(
|
|
doc = "The list of allowed values for this setting. An error is raised if any other value is given.",
|
|
),
|
|
},
|
|
doc = "A string-typed build setting that cannot be set on the command line",
|
|
)
|