110 lines
4.1 KiB
Python
110 lines
4.1 KiB
Python
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# -*- coding: utf-8 -*-
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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 lxcmgr.paths import LXC_STORAGE_DIR
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from . import crypto
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from .paths import APP_DIR, IMAGE_DIR, META_FILE, PRIVATE_KEY, ROOT_DIR, SIGNATURE_FILE
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class PackageExistsError(Exception):
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pass
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class Packer:
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def __init__(self):
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self.app = None
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self.image = None
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self.tar_path = None
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self.xz_path = None
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def load_packages_meta(self):
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if os.path.exists(PKG_META):
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with open(PKG_META, 'r') as f:
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return json.load(f)
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else:
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return {'apps': {}, 'images': {}}
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def save_packages_meta(self, packages):
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with open(PKG_META, 'w') as f:
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json.dump(packages, f, sort_keys=True, indent=4)
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def pack_image(self, image, force):
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self.image = image
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# Prepare package file names
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self.tar_path = os.path.join(IMAGE_DIR, '{}.tar'.format(self.image.name))
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self.xz_path = '{}.xz'.format(self.tar_path)
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if os.path.exists(self.xz_path):
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if force:
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self.unregister_image()
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os.unlink(self.xz_path)
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else:
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raise PackageExistsError(self.xz_path)
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self.create_image_archive()
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self.register_image()
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self.sign_packages()
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def create_image_archive(self):
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# Create archive
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print('Archiving', self.image.path)
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subprocess.run(['tar', '--xattrs', '-cpf', self.tar_path, self.image.name], cwd=LXC_STORAGE_DIR)
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self.compress_archive()
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def compress_archive(self):
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# Compress the tarball with xz (LZMA2)
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print('Compressing', self.tar_path, '({:.2f} MB)'.format(os.path.getsize(self.tar_path)/1048576))
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subprocess.run(['xz', '-9', self.tar_path])
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print('Compressed ', self.xz_path, '({:.2f} MB)'.format(os.path.getsize(self.xz_path)/1048576))
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def register_image(self):
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# Register package in global repository metadata file
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print('Registering package {}'.format(self.image.name))
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packages = self.load_packages_meta()
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packages['images'][self.image.name] = self.image.conf.copy()
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packages['images'][self.image.name]['size'] = os.path.getsize(self.xz_path)
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packages['images'][self.image.name]['sha512'] = crypto.hash_file(self.xz_path)
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self.save_packages_meta(packages)
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def sign_packages(self):
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signature = crypto.sign_file(PRIVATE_KEY, META_FILE)
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with open(SIGNATURE_FILE, 'wb') as f:
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f.write(signature)
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def unregister_image(self):
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# Removes package from global repository metadata file
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packages = self.load_packages_meta()
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if self.image.name in packages['images']:
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del packages['images'][self.image.name]
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self.save_packages_meta(packages)
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def pack_app(self, app):
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self.app = app
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# Prepare package file names
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self.tar_path = os.path.join(APP_DIR, '{}.tar'.format(self.image.name))
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self.xz_path = '{}.xz'.format(self.tar_path)
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if os.path.exists(self.xz_path):
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os.unlink(self.xz_path)
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self.create_app_archive()
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self.register_app()
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self.sign_packages()
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def create_app_archive(self):
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# Create archive with application setup scripts
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print('Archiving setup scripts for', self.app.name)
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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(self.app.build_dir, s))]
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subprocess.run(['tar', '--xattrs', '-cpf', self.tar_path] + scripts, cwd=self.app.build_dir)
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self.compress_archive()
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def register_app(self):
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# Register package in global repository metadata file
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print('Registering package {}'.format(self.app.name))
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packages = self.load_packages_meta()
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packages['apps'][self.image.name] = self.app.conf.copy()
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packages['apps'][self.image.name]['size'] = os.path.getsize(self.xz_path)
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packages['apps'][self.image.name]['sha512'] = crypto.hash_file(self.xz_path)
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self.save_packages_meta(packages)
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