37 lines
966 B
Python
37 lines
966 B
Python
def _rootfs_impl(ctx):
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output = ctx.outputs.output
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ctx.actions.run(
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outputs = [output],
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executable = ctx.files._undocker[0],
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arguments = [
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ctx.attr.src.path,
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output.path,
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],
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)
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rootfs = rule(
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doc = "Generate a rootfs from a docker container image",
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implementation = _rootfs_impl,
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outputs = {
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"out": "%{name}.tar",
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},
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attrs = {
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"src": attr.label(
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doc = "Input container tarball",
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mandatory = True,
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allow_single_file = [".tar"],
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),
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"output": attr.output(
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doc = "Output rootfs tarball",
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mandatory = True,
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),
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"_undocker": attr.label(
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doc = "undocker cli; private and may not be overridden",
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cfg = "host",
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default = Label("//src/undocker:undocker"),
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allow_single_file = True,
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executable = True,
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),
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},
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)
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