mirror of
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50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
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"""A rule to build a single executable for a specific platform."""
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def _platform_transition_impl(settings, attr):
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_ignore = settings # @unused
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return {
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"//command_line_option:platforms": "{}".format(attr.platform),
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}
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_platform_transition = transition(
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implementation = _platform_transition_impl,
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inputs = [],
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outputs = [
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"//command_line_option:platforms",
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],
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)
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def _platform_binary_impl(ctx):
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out = ctx.actions.declare_file("{}_{}".format(ctx.file.target_file.basename, ctx.attr.platform))
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ctx.actions.symlink(output = out, target_file = ctx.file.target_file)
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return [
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DefaultInfo(
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executable = out,
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files = depset([out]),
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runfiles = ctx.runfiles(files = ctx.files.target_file),
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),
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]
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_attrs = {
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"platform": attr.string(
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doc = "The platform to build the target for.",
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),
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"target_file": attr.label(
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allow_single_file = True,
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mandatory = True,
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doc = "Target to build.",
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),
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"_allowlist_function_transition": attr.label(
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default = "@bazel_tools//tools/allowlists/function_transition_allowlist",
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),
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}
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# wrap a single exectable and build it for the specified platform.
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platform_binary = rule(
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implementation = _platform_binary_impl,
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cfg = _platform_transition,
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attrs = _attrs,
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executable = True,
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)
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