gstreamer/subprojects/macos-bison-binary/download-binary.py

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#!/usr/bin/env python3
import os
import sys
import ssl
import tarfile
import hashlib
import urllib.request
import urllib.error
# Disable certificate checking because it requires custom Python setup on macOS
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
EXTRACTDIR = 'bison-{}-macos-{}'
BASENAME = '{}.tar.bz2'.format(EXTRACTDIR)
GSTREAMER_URL = 'https://gstreamer.freedesktop.org/src/mirror/{}'
version = sys.argv[1]
arch = sys.argv[2]
tar_sha256 = sys.argv[3]
source_dir = os.path.join(os.environ['MESON_SOURCE_ROOT'], os.environ['MESON_SUBDIR'])
dest = BASENAME.format(version, arch)
dest_path = os.path.join(source_dir, dest)
extract_path = EXTRACTDIR.format(version, arch)
def get_sha256(tarf):
hasher = hashlib.sha256()
with open(tarf, 'rb') as f:
hasher.update(f.read())
return hasher.hexdigest()
def download():
for url in (GSTREAMER_URL.format(dest),):
print('Downloading {} to {}'.format(url, dest), file=sys.stderr)
try:
with open(dest_path, 'wb') as d:
f = urllib.request.urlopen(url, context=ctx)
d.write(f.read())
break
except urllib.error.URLError as ex:
print(ex, file=sys.stderr)
print('Failed to download from {!r}, trying mirror...'.format(url), file=sys.stderr)
continue
else:
curdir = os.path.dirname(sys.argv[0])
print('Couldn\'t download {!r}! Try downloading it manually and '
'placing it into {!r}'.format(dest, curdir), file=sys.stderr)
def print_extract_dir():
'Print the extracted directory name'
print(extract_path, end='')
if os.path.isfile(dest_path):
found_sha256 = get_sha256(dest_path)
if found_sha256 == tar_sha256:
if os.path.isdir(os.path.join(source_dir, extract_path)):
print('{} already downloaded and extracted'.format(dest), file=sys.stderr)
print_extract_dir()
sys.exit(0)
else:
print('{} checksum mismatch, redownloading'.format(dest), file=sys.stderr)
download()
else:
download()
found_sha256 = get_sha256(dest_path)
if found_sha256 != tar_sha256:
print('SHA256 of downloaded file {} was {} instead of {}'
''.format(dest, found_sha256, tar_sha256), file=sys.stderr)
sys.exit(1)
print('Extracting {}'.format(dest), file=sys.stderr)
tf = tarfile.open(dest_path, "r")
tf.extractall(path=source_dir)
print_extract_dir()