Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/Sources/formale Sprachen/C/Firefox/taskcluster/scripts/misc/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 3 kB

Quelle unpack-sdk.py Sprache: Python

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import hashlib
import os
import shutil
import stat
import sys
import tempfile
from io import BytesIO
from urllib.request import urlopen

from mozpack.macpkg import Pbzx, uncpio, unxar

def unpack_sdk(url, sha512, extract_prefix, out_dir="."):
    if "MOZ_AUTOMATION" in os.environ:
        url = f"http://taskcluster/tooltool.mozilla-releng.net/sha512/{sha512}"
    with tempfile.TemporaryFile() as pkg:
        hash = hashlib.sha512()
        for attempt in range(3):
            if attempt != 0:
                print(f"Failed to download from {url}. Retrying", file=sys.stderr)

            with urlopen(url) as fh:
                # Equivalent to shutil.copyfileobj, but computes sha512 at the same time.
                while True:
                    buf = fh.read(1024 * 1024)
                    if not buf:
                        break
                    hash.update(buf)
                    pkg.write(buf)
            digest = hash.hexdigest()
            if digest == sha512:
                break
        else:
            raise Exception(f"(actual) {digest} != (expected) {sha512}")

        pkg.seek(0, os.SEEK_SET)

        for name, content in unxar(pkg):
            if name in ("Payload", "Content"):
                extract_payload(content, extract_prefix, out_dir)

def extract_payload(fileobj, extract_prefix, out_dir="."):
    hardlinks = {}
    for path, st, content in uncpio(Pbzx(fileobj)):
        if not path:
            continue
        path = path.decode()
        matches = path.startswith(extract_prefix)
        if matches:
            path = os.path.join(out_dir, path[len(extract_prefix) :].lstrip("/"))

        # When there are hardlinks, normally a cpio stream is supposed to
        # contain the data for all of them, but, even with compression, that
        # can be a waste of space, so in some cpio streams (*cough* *cough*,
        # Apple's, e.g. in Xcode), the files after the first one have dummy
        # data.
        # As we may be filtering the first file out (if it doesn't match
        # extract_prefix), we need to keep its data around (we're not going
        # to be able to rewind).
        if stat.S_ISREG(st.mode) and st.nlink > 1:
            key = (st.dev, st.ino)
            hardlink = hardlinks.get(key)
            if hardlink:
                hardlink[0] -= 1
                if hardlink[0] == 0:
                    del hardlinks[key]
                content = hardlink[1]
                if isinstance(content, BytesIO):
                    content.seek(0)
                    if matches:
                        hardlink[1] = path
            elif matches:
                hardlink = hardlinks[key] = [st.nlink - 1, path]
            else:
                hardlink = hardlinks[key] = [st.nlink - 1, BytesIO(content.read())]
                content = hardlink[1]

        if not matches:
            continue
        if stat.S_ISDIR(st.mode):
            os.makedirs(path, exist_ok=True)
        else:
            parent = os.path.dirname(path)
            if parent:
                os.makedirs(parent, exist_ok=True)

            if stat.S_ISLNK(st.mode):
                os.symlink(content.read(), path)
            elif stat.S_ISREG(st.mode):
                if isinstance(content, str):
                    os.link(content, path)
                else:
                    with open(path, "wb") as out:
                        shutil.copyfileobj(content, out)
            else:
                raise Exception(f"File mode {st.mode:o} is not supported")

if __name__ == "__main__":
    unpack_sdk(*sys.argv[1:])

quality83%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.