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https://github.com/bazel-contrib/bazel-lib
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61 lines
1.8 KiB
Python
61 lines
1.8 KiB
Python
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"""A small utility module dedicated to detecting whether or not the `--stamp` flag is enabled
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This module can be removed likely after the following PRs ar addressed:
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- https://github.com/bazelbuild/bazel/issues/11164
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"""
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StampSettingInfo = provider(
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doc = "Information about the `--stamp` command line flag",
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fields = {
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"value": "bool: Whether or not the `--stamp` flag was enabled",
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},
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)
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def _stamp_build_setting_impl(ctx):
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return StampSettingInfo(value = ctx.attr.value)
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_stamp_build_setting = rule(
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doc = "Adapter from our config_setting to a Provider for downstream rules",
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implementation = _stamp_build_setting_impl,
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attrs = {
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"value": attr.bool(
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doc = "The default value of the stamp build flag",
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mandatory = True,
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),
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},
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)
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def stamp_build_setting(name, visibility = ["//visibility:public"]):
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native.config_setting(
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name = "stamp_detect",
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values = {"stamp": "1"},
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visibility = visibility,
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)
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_stamp_build_setting(
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name = name,
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value = select({
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":stamp_detect": True,
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"//conditions:default": False,
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}),
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visibility = visibility,
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)
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def is_stamping_enabled(attr):
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"""Determine whether or not build stamping is enabled.
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Args:
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attr (struct): A rule's struct of attributes (`ctx.attr`)
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Returns:
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bool: The stamp value
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"""
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stamp_num = getattr(attr, "stamp", -1)
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if stamp_num > 0:
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return True
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elif stamp_num == 0:
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return False
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elif stamp_num < 0:
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stamp_flag = getattr(attr, "_stamp_flag", None)
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return stamp_flag[StampSettingInfo].value if stamp_flag else False
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else:
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fail("Unexpected `stamp` value: {}".format(stamp_num))
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