cab71e5b18
By default, xz only uses one CPU core even if multiple cores are available. If xz compression is chosen, allow xz to use all of the cores available. Signed-off-by: Major Hayden <major@redhat.com>
78 lines
2 KiB
Python
Executable file
78 lines
2 KiB
Python
Executable file
#!/usr/bin/python3
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import json
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import subprocess
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import sys
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STAGE_DESC = "Assemble a tar archive"
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STAGE_INFO = """
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Assembles the tree into a tar archive named `filename`.
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Uses the buildhost's `tar` command, like: `tar -cf $FILENAME -C $TREE`
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If the `compression` option is given, the archive will be compressed by passing
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the `--{compression}` option to `tar`. (This option is non-standard and might
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not work for anything other than GNU tar.)
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Known options for `compression`: "bzip2", "xz", "lzip", "lzma", "lzop", "gzip".
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Note that using `compression` does not add an extension to `filename`, so the
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caller is responsible for making sure that `compression` and `filename` match.
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Buildhost commands used: `tar` and any named `compression` program.
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"""
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STAGE_OPTS = """
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"required": ["filename"],
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"properties": {
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"filename": {
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"description": "Filename for tar archive",
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"type": "string"
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},
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"compression": {
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"description": "Name of compression program",
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"type": "string",
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"enum": ["bzip2", "xz", "lzip", "lzma", "lzop", "gzip"]
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}
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}
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"""
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def main(tree, output_dir, options):
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filename = options["filename"]
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compression = options.get("compression")
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extra_args = []
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if compression is not None:
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if compression not in {"bzip2", "xz", "lzip", "lzma", "lzop", "gzip"}:
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return 1
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extra_args.append(f"--{compression}")
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# Set environment variables for the tar operation.
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tar_env = {
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# Speed up xz by allowing it to use all CPU cores for compression.
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"XZ_OPT": "--threads 0"
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}
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# Set up the tar command.
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tar_cmd = [
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"tar",
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*extra_args,
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"-cf", f"{output_dir}/{filename}",
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"-C", tree,
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"."
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]
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# Make a tarball of the tree.
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subprocess.run(
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tar_cmd,
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stdout=subprocess.DEVNULL,
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check=True,
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env=tar_env
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)
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return 0
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if __name__ == '__main__':
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args = json.load(sys.stdin)
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r = main(args["tree"], args["output_dir"], args["options"])
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sys.exit(r)
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