undocker/rules.bzl

32 lines
842 B
Python

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