Disassembler
ce325cf3d0
- Bump basic OS to Alpine 3.9 - Restructure repo and add layer versioning - Use JSON for all metadata - Merge abuild branch (but without abuild)
93 lines
3.3 KiB
Python
Executable File
93 lines
3.3 KiB
Python
Executable File
#!/usr/bin/python3
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import hashlib
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import json
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import os
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import subprocess
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import sys
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.asymmetric import ec
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from cryptography.hazmat.primitives.serialization import load_pem_private_key
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PKG_ROOT = '/srv/build/lxc'
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PRIVATE_KEY = '/srv/build/packages.key'
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LXC_ROOT = '/var/lib/lxc'
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def pack(path):
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# Determine correct metadata file and package name
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path = os.path.realpath(path)
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if os.path.isdir(path):
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meta_dir = path
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meta_file = os.path.join(meta_dir, 'meta')
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else:
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meta_dir = os.path.dirname(path)
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meta_file = path
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pkg_name = os.path.basename(meta_dir)
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# Load metadata
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with open(meta_file) as f:
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meta = json.load(f)
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# Prepare package file names
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os.makedirs(PKG_ROOT, 0o755, True)
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tar_path = os.path.join(PKG_ROOT, '{}_{}-{}.tar'.format(pkg_name, meta['version'], meta['release']))
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xz_path = '{}.xz'.format(tar_path)
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# Remove old package
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if os.path.exists(tar_path):
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os.unlink(tar_path)
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if os.path.exists(xz_path):
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os.unlink(xz_path)
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# Create archive
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print('Archiving', meta['lxcpath'])
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subprocess.run(['tar', '--xattrs', '-cpf', tar_path, os.path.join(LXC_ROOT, meta['lxcpath'])], cwd='/')
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# Add install/upgrade/uninstall scripts
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scripts = ('install', 'install.sh', 'upgrade', 'upgrade.sh', 'uninstall', 'uninstall.sh')
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scripts = [s for s in scripts if os.path.exists(os.path.join(meta_dir, s))]
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subprocess.run(['tar', '--transform', 's|^|srv/{}/|'.format(pkg_name), '-rpf', tar_path] + scripts, cwd=meta_dir)
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# Compress the tarball with xz (LZMA2)
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print('Compressing', tar_path, '({:.2f} MB)'.format(os.path.getsize(tar_path)/1048576))
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subprocess.run(['xz', '-9', tar_path])
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print('Compressed ', xz_path, '({:.2f} MB)'.format(os.path.getsize(xz_path)/1048576))
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# Register package
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print('Registering package')
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packages = {}
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packages_file = os.path.join(PKG_ROOT, 'packages')
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if os.path.exists(packages_file):
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with open(packages_file, 'r') as f:
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packages = json.load(f)
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packages[pkg_name] = meta
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packages[pkg_name]['size'] = os.path.getsize(xz_path)
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packages[pkg_name]['sha512'] = hash_file(xz_path)
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with open(packages_file, 'w') as f:
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json.dump(packages, f, sort_keys=True, indent=4)
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# Sign packages file
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print('Signing packages')
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with open(PRIVATE_KEY, 'rb') as f:
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priv_key = load_pem_private_key(f.read(), None, default_backend())
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with open(os.path.join(PKG_ROOT, 'packages'), 'rb') as f:
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data = f.read()
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with open(os.path.join(PKG_ROOT, 'packages.sig'), 'wb') as f:
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f.write(priv_key.sign(data, ec.ECDSA(hashes.SHA512())))
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def hash_file(file_path):
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sha512 = hashlib.sha512()
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with open(file_path, 'rb') as f:
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while True:
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data = f.read(65536)
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if not data:
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break
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sha512.update(data)
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return sha512.hexdigest()
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if __name__ == '__main__':
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if len(sys.argv) != 2 or sys.argv[1] in ('-h', '--help'):
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print('Usage: lxc-pack <buildpath>\n where the buildpath can be either specific meta file or a directory containing one')
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else:
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pack(sys.argv[1])
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