54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
"params_file rule"
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load("//lib/private:expand_make_vars.bzl", "expand_locations")
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_ATTRS = {
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"args": attr.string_list(),
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"data": attr.label_list(allow_files = True),
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"is_windows": attr.bool(mandatory = True),
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"newline": attr.string(
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values = ["unix", "windows", "auto"],
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default = "auto",
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),
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"out": attr.output(mandatory = True),
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}
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def _expand_locations(ctx, s):
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# `.split(" ")` is a work-around https://github.com/bazelbuild/bazel/issues/10309
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# TODO: If the string has intentional spaces or if one or more of the expanded file
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# locations has a space in the name, we will incorrectly split it into multiple arguments
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return expand_locations(ctx, s, targets = ctx.attr.data).split(" ")
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def _impl(ctx):
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if ctx.attr.newline == "auto":
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newline = "\r\n" if ctx.attr.is_windows else "\n"
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elif ctx.attr.newline == "windows":
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newline = "\r\n"
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else:
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newline = "\n"
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expanded_args = []
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# First expand predefined source/output path variables
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for a in ctx.attr.args:
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expanded_args += _expand_locations(ctx, a)
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# Next expand predefined variables & custom variables
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expanded_args = [ctx.expand_make_variables("args", e, {}) for e in expanded_args]
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# ctx.actions.write creates a FileWriteAction which uses UTF-8 encoding.
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ctx.actions.write(
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output = ctx.outputs.out,
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content = newline.join(expanded_args),
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is_executable = False,
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)
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files = depset(direct = [ctx.outputs.out])
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runfiles = ctx.runfiles(files = [ctx.outputs.out])
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return [DefaultInfo(files = files, runfiles = runfiles)]
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params_file = rule(
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implementation = _impl,
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provides = [DefaultInfo],
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attrs = _ATTRS,
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)
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