Attachment 1774852 Details for Bug 1949456 – python definition file for Image Builder to create TAR images.

python definition file for Image Builder to create TAR images.

org.osbuild.tar (text/plain), 2.66 KB, created by Terry Bowling on 2021-04-23 14:49:42 UTC

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Creator: Terry Bowling

Created: 2021-04-23 14:49:42 UTC

Size: 2.66 KB

patch

obsolete

>#!/usr/libexec/platform-python
>"""
>Assemble a tar archive
>
>Assembles the tree into a tar archive named `filename`.
>
>Uses the buildhost's `tar` command, like: `tar -cf $FILENAME -C $TREE`
>
>If the `compression` option is given, the archive will be compressed by passing
>the `--{compression}` option to `tar`. (This option is non-standard and might
>not work for anything other than GNU tar.)
>
>Known options for `compression`: "bzip2", "xz", "lzip", "lzma", "lzop", "gzip".
>
>Note that using `compression` does not add an extension to `filename`, so the
>caller is responsible for making sure that `compression` and `filename` match.
>
>Buildhost commands used: `tar` and any named `compression` program.
>"""
>
>
>import json
>import subprocess
>import sys
>
>SCHEMA = """
>"additionalProperties": false,
>"required": ["filename"],
>"properties": {
>  "filename": {
>    "description": "Filename for tar archive",
>    "type": "string"
>  },
>  "compression": {
>    "description": "Name of compression program",
>    "type": "string",
>    "enum": ["bzip2", "xz", "lzip", "lzma", "lzop", "gzip"]
>  },
>  "acls": {
>      "description": "Enable support for POSIX ACLs",
>      "type": "boolean",
>      "default": true
>  },
>  "selinux": {
>      "description": "Enable support for SELinux contexts",
>      "type": "boolean",
>      "default": true
>  },
>  "xattrs": {
>      "description": "Enable support for extended attributes",
>      "type": "boolean",
>      "default": true
>  }
>}
>"""
>
>def main(tree, output_dir, options):
>    filename = options["filename"]
>    compression = options.get("compression")
>
>    extra_args = []
>    if compression is not None:
>        if compression not in {"bzip2", "xz", "lzip", "lzma", "lzop", "gzip"}:
>            return 1
>        extra_args.append(f"--{compression}")
>
>    # Set environment variables for the tar operation.
>    tar_env = {
>        # Speed up xz by allowing it to use all CPU cores for compression.
>        "XZ_OPT": "--threads 0"
>    }
>
>    # SELinux context, ACLs and extended attributes
>    if options.get("acls", True):
>        extra_args += ["--acls"]
>
>    if options.get("selinux", True):
>        extra_args += ["--selinux"]
>
>    if options.get("xattrs", True):
>        extra_args += ["--xattrs", "--xattrs-include", "*"]
>
>    # Set up the tar command.
>    tar_cmd = [
>        "tar",
>        *extra_args,
>        "-cf", f"{output_dir}/{filename}",
>        "-C", tree,
>        "."
>    ]
>
>    # Make a tarball of the tree.
>    subprocess.run(
>        tar_cmd,
>        stdout=subprocess.DEVNULL,
>        check=True,
>        env=tar_env
>    )
>
>    return 0
>
>
>if __name__ == '__main__':
>    args = json.load(sys.stdin)
>    r = main(args["tree"], args["output_dir"], args["options"])
>    sys.exit(r)

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Attachments on bug 1949456: 1771849 | 1771851 | 1771852 | 1774463 | 1774852