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74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
"""toolchain to provide an mkosi binary."""
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TOOLCHAIN_TYPE = "@constellation//bazel/mkosi:toolchain_type"
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MAKE_VARIABLES = "@constellation//bazel/mkosi:make_variables"
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MkosiInfo = provider(
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doc = """Information needed to invoke mkosi.""",
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fields = {
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"label": "Label of a target providing a mkosi binary",
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"name": "The name of the toolchain",
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"path": "Path to the mkosi binary",
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"valid": "Is this toolchain valid and usable?",
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},
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)
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def _mkosi_toolchain_impl(ctx):
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if ctx.attr.label and ctx.attr.path:
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fail("mkosi_toolchain: label and path are mutually exclusive")
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valid = bool(ctx.attr.label) or bool(ctx.attr.path)
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mkosi_info = MkosiInfo(
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name = str(ctx.label),
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valid = valid,
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label = ctx.attr.label,
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path = ctx.attr.path,
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)
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toolchain_info = platform_common.ToolchainInfo(
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mkosi = mkosi_info,
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)
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return [toolchain_info]
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mkosi_toolchain = rule(
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implementation = _mkosi_toolchain_impl,
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attrs = {
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"label": attr.label(
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doc = "Label of a target providing a mkosi binary. Mutually exclusive with path.",
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executable = True,
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cfg = "exec",
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allow_single_file = True,
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default = None,
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),
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"path": attr.string(
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doc = "Path to the mkosi binary. Mutually exclusive with label.",
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),
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},
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)
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def _mkosi_make_variables_impl(ctx):
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info = ctx.toolchains[TOOLCHAIN_TYPE].mkosi
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variables = {}
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if info.valid:
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binary_path = info.label[DefaultInfo].files_to_run.executable.path if info.label else info.path
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variables["MKOSI"] = binary_path
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return [platform_common.TemplateVariableInfo(variables)]
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mkosi_make_variables = rule(
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doc = "Make variables for mkosi.",
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implementation = _mkosi_make_variables_impl,
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toolchains = [TOOLCHAIN_TYPE],
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)
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def _is_mkosi_available_impl(ctx):
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toolchain = ctx.toolchains[TOOLCHAIN_TYPE]
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available = toolchain and toolchain.mkosi.valid
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return [config_common.FeatureFlagInfo(
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value = ("1" if available else "0"),
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)]
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is_mkosi_available = rule(
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implementation = _is_mkosi_available_impl,
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attrs = {},
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toolchains = [TOOLCHAIN_TYPE],
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)
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