115 lines
2.9 KiB
Python
Executable file
115 lines
2.9 KiB
Python
Executable file
#!/usr/bin/python3
|
|
"""
|
|
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.
|
|
|
|
By default POSIX ACLs, SELinux contexts and extended attributes are included,
|
|
in order to preserve the tree as closely as possible. It is possible to opt
|
|
out of any of those by supplying the corresponding option.
|
|
|
|
Buildhost commands used: `tar` and any named `compression` program.
|
|
"""
|
|
|
|
|
|
import subprocess
|
|
import sys
|
|
|
|
import osbuild.api
|
|
|
|
CAPABILITIES = ["CAP_MAC_ADMIN"]
|
|
|
|
|
|
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 = osbuild.api.arguments()
|
|
args_input = args["inputs"]["tree"]["path"]
|
|
args_output = args["tree"]
|
|
r = main(args_input, args_output, args["options"])
|
|
sys.exit(r)
|