45 lines
1.1 KiB
Python
45 lines
1.1 KiB
Python
load("@rules_pkg//:pkg.bzl", "pkg_tar")
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_undocker_cli = 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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_input_container = 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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def _rootfs_impl(ctx):
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out = ctx.outputs.out
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if out == None:
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out = ctx.actions.declare_file(ctx.attr.name + ".tar")
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ctx.actions.run(
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outputs = [out],
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inputs = ctx.files.src,
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executable = ctx.executable._undocker,
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arguments = [
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ctx.files.src[0].path,
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out.path,
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],
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mnemonic = "RootFS",
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)
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return DefaultInfo(
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files = depset([out]),
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runfiles = ctx.runfiles(files = ctx.files.src),
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)
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rootfs = rule(
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_rootfs_impl,
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doc = "Generate a rootfs from a docker container image",
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attrs = {
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"src": _input_container,
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"_undocker": _undocker_cli,
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"out": attr.output(),
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},
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)
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