109 lines
3.8 KiB
Python
109 lines
3.8 KiB
Python
#!/usr/local/autopkg/python
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#
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# Copyright 2013 Greg Neagle
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""See docstring for PkgExtractor class"""
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import os
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import plistlib
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import shutil
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import subprocess
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from autopkglib import ProcessorError
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from autopkglib.DmgMounter import DmgMounter
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__all__ = ["PkgExtractor"]
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class PkgExtractor(DmgMounter):
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"""Extracts the contents of a bundle-style pkg (possibly on a disk image)
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to pkgroot."""
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description = __doc__
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input_variables = {
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"pkg_path": {"required": True, "description": "Path to a package."},
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"extract_root": {
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"required": True,
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"description": "Path to where the new package root will be created.",
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},
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}
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output_variables = {}
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def extract_payload(self, pkg_path, extract_root):
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"""Extract package contents to extract_root, preserving intended
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directory structure"""
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info_plist = os.path.join(pkg_path, "Contents/Info.plist")
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archive_path = os.path.join(pkg_path, "Contents/Archive.pax.gz")
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if not os.path.exists(info_plist):
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raise ProcessorError("Info.plist not found in pkg")
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if not os.path.exists(archive_path):
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raise ProcessorError("Archive.pax.gz not found in pkg")
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if os.path.exists(extract_root):
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try:
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shutil.rmtree(extract_root)
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except OSError as err:
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raise ProcessorError(f"Failed to remove extract_root: {err}") from err
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try:
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with open(info_plist, "rb") as f:
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info = plistlib.load(f)
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except Exception as err:
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raise ProcessorError(f"Failed to read Info.plist: {err}") from err
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install_target = info.get("IFPkgFlagDefaultLocation", "/").lstrip("/")
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extract_path = os.path.join(extract_root, install_target)
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try:
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os.makedirs(extract_path, 0o755)
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except OSError as err:
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raise ProcessorError(f"Failed to create extract_path: {err}") from err
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# Unpack payload.
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try:
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proc = subprocess.Popen(
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("/usr/bin/ditto", "-x", "-z", archive_path, extract_path),
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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text=True,
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)
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(_, stderr) = proc.communicate()
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except OSError as err:
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raise ProcessorError(
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f"ditto execution failed with error code {err.errno}: {err.strerror}"
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) from err
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if proc.returncode != 0:
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raise ProcessorError(f"Unpacking payload failed: {stderr}")
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def main(self):
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# Check if we're trying to read something inside a dmg.
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(dmg_path, dmg, dmg_source_path) = self.parsePathForDMG(self.env["pkg_path"])
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try:
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if dmg:
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# Mount dmg and copy path inside.
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mount_point = self.mount(dmg_path)
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pkg_path = os.path.join(mount_point, dmg_source_path)
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else:
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# just use the given path
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pkg_path = self.env["pkg_path"]
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self.extract_payload(pkg_path, self.env["extract_root"])
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finally:
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if dmg:
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self.unmount(dmg_path)
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if __name__ == "__main__":
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PROCESSOR = PkgExtractor()
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PROCESSOR.execute_shell()
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