32 lines
975 B
Python
32 lines
975 B
Python
"""Helpers for Docker image generation."""
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def _docker_image_impl(ctx):
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importer = ctx.actions.declare_file(ctx.label.name)
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importer_content = [
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"#!/bin/bash",
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"set -euo pipefail",
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"exec docker import " + " ".join([
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"-c '%s'" % attr
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for attr in ctx.attr.statements
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]) + " " + " ".join([
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"'%s'" % f.path
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for f in ctx.files.data
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]) + " $1",
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"",
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]
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ctx.actions.write(importer, "\n".join(importer_content), is_executable = True)
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return [DefaultInfo(
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runfiles = ctx.runfiles(ctx.files.data),
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executable = importer,
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)]
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docker_image = rule(
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implementation = _docker_image_impl,
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doc = "Tool to load a Docker image; takes a single parameter (image name).",
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attrs = {
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"statements": attr.string_list(doc = "Extra Dockerfile directives."),
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"data": attr.label_list(doc = "All image data."),
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},
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executable = True,
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)
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