X-Git-Url: http://git.scottworley.com/pinch/blobdiff_plain/9d7844bb9474c2431f268061dffed0c5c49ddc7d..bed3218277c11d0e6092683f0a2d00225f84d8ae:/pinch.py?ds=inline diff --git a/pinch.py b/pinch.py index 46e5af3..24e132a 100644 --- a/pinch.py +++ b/pinch.py @@ -25,6 +25,19 @@ from typing import ( Tuple, ) +# Use xdg module when it's less painful to have as a dependency + + +class XDG(types.SimpleNamespace): + XDG_CACHE_HOME: str + + +xdg = XDG( + XDG_CACHE_HOME=os.getenv( + 'XDG_CACHE_HOME', + os.path.expanduser('~/.cache'))) + + Digest16 = NewType('Digest16', str) Digest32 = NewType('Digest32', str) @@ -38,6 +51,7 @@ class ChannelTableEntry(types.SimpleNamespace): class Channel(types.SimpleNamespace): + alias_of: str channel_html: bytes channel_url: str forwarded_url: str @@ -215,11 +229,20 @@ def fetch_resources(v: Verification, channel: Channel) -> None: def git_cachedir(git_repo: str) -> str: - # TODO: Consider using pyxdg to find this path. - return os.path.expanduser( - '~/.cache/pinch/git/%s' % - digest_string( - git_repo.encode())) + return os.path.join( + xdg.XDG_CACHE_HOME, + 'pinch/git', + digest_string(git_repo.encode())) + + +def tarball_cache_file(channel: Channel) -> str: + return os.path.join( + xdg.XDG_CACHE_HOME, + 'pinch/git-tarball', + '%s-%s-%s' % + (digest_string(channel.git_repo.encode()), + channel.git_revision, + channel.release_name)) def verify_git_ancestry(v: Verification, channel: Channel) -> None: @@ -359,13 +382,20 @@ def git_checkout(v: Verification, channel: Channel, dest: str) -> None: stdout=subprocess.PIPE) tar = subprocess.Popen( ['tar', 'x', '-C', dest, '-f', '-'], stdin=git.stdout) - git.stdout.close() + if git.stdout: + git.stdout.close() tar.wait() git.wait() v.result(git.returncode == 0 and tar.returncode == 0) def git_get_tarball(v: Verification, channel: Channel) -> str: + cache_file = tarball_cache_file(channel) + if os.path.exists(cache_file): + cached_tarball = open(cache_file).read(9999) + if os.path.exists(cached_tarball): + return cached_tarball + with tempfile.TemporaryDirectory() as output_dir: output_filename = os.path.join( output_dir, channel.release_name + '.tar.xz') @@ -389,7 +419,11 @@ def git_get_tarball(v: Verification, channel: Channel) -> str: process = subprocess.run( ['nix-store', '--add', output_filename], capture_output=True) v.result(process.returncode == 0) - return process.stdout.decode().strip() + store_tarball = process.stdout.decode().strip() + + os.makedirs(os.path.dirname(cache_file), exist_ok=True) + open(cache_file, 'w').write(store_tarball) + return store_tarball def check_channel_metadata( @@ -444,26 +478,36 @@ def git_revision_name(v: Verification, channel: Channel) -> str: process = subprocess.run(['git', '-C', git_cachedir(channel.git_repo), - 'lo', + 'log', '-n1', '--format=%ct-%h', '--abbrev=11', channel.git_revision], capture_output=True) - v.result(process.returncode == 0 and process.stdout != '') + v.result(process.returncode == 0 and process.stdout != b'') return '%s-%s' % (os.path.basename(channel.git_repo), process.stdout.decode().strip()) +def read_config(filename: str) -> configparser.ConfigParser: + config = configparser.ConfigParser() + config.read_file(open(filename), filename) + return config + + def pin(args: argparse.Namespace) -> None: v = Verification() - config = configparser.ConfigParser() - config.read_file(open(args.channels_file), args.channels_file) + config = read_config(args.channels_file) for section in config.sections(): if args.channels and section not in args.channels: continue channel = Channel(**dict(config[section].items())) + + if hasattr(channel, 'alias_of'): + assert not hasattr(channel, 'git_repo') + continue + if hasattr(channel, 'git_revision'): channel.old_git_revision = channel.git_revision del channel.git_revision @@ -482,23 +526,49 @@ def pin(args: argparse.Namespace) -> None: config.write(configfile) +def fetch_channel( + v: Verification, + section: str, + conf: configparser.SectionProxy) -> str: + if 'git_repo' not in conf or 'release_name' not in conf: + raise Exception( + 'Cannot update unpinned channel "%s" (Run "pin" before "update")' % + section) + + if 'channel_url' in conf: + return fetch_with_nix_prefetch_url( + v, conf['tarball_url'], Digest16( + conf['tarball_sha256'])) + + channel = Channel(**dict(conf.items())) + ensure_git_rev_available(v, channel) + return git_get_tarball(v, channel) + + def update(args: argparse.Namespace) -> None: v = Verification() config = configparser.ConfigParser() - config.read_file(open(args.channels_file), args.channels_file) - exprs = [] - for section in config.sections(): - if 'channel_url' in config[section]: - tarball = fetch_with_nix_prefetch_url( - v, config[section]['tarball_url'], Digest16( - config[section]['tarball_sha256'])) - else: - channel = Channel(**dict(config[section].items())) - ensure_git_rev_available(v, channel) - tarball = git_get_tarball(v, channel) - exprs.append( - 'f: f { name = "%s"; channelName = "%s"; src = builtins.storePath "%s"; }' % - (config[section]['release_name'], section, tarball)) + exprs: Dict[str, str] = {} + configs = [read_config(filename) for filename in args.channels_file] + for config in configs: + for section in config.sections(): + if 'alias_of' in config[section]: + assert 'git_repo' not in config[section] + continue + tarball = fetch_channel(v, section, config[section]) + if section in exprs: + raise Exception('Duplicate channel "%s"' % section) + exprs[section] = ( + 'f: f { name = "%s"; channelName = "%%s"; src = builtins.storePath "%s"; }' % + (config[section]['release_name'], tarball)) + + for config in configs: + for section in config.sections(): + if 'alias_of' in config[section]: + if section in exprs: + raise Exception('Duplicate channel "%s"' % section) + exprs[section] = exprs[str(config[section]['alias_of'])] + command = [ 'nix-env', '--profile', @@ -508,7 +578,7 @@ def update(args: argparse.Namespace) -> None: '--file', '', '--install', - '--from-expression'] + exprs + '--from-expression'] + [exprs[name] % name for name in sorted(exprs.keys())] if args.dry_run: print(' '.join(map(shlex.quote, command))) else: @@ -526,7 +596,7 @@ def main() -> None: parser_pin.set_defaults(func=pin) parser_update = subparsers.add_parser('update') parser_update.add_argument('--dry-run', action='store_true') - parser_update.add_argument('channels_file', type=str) + parser_update.add_argument('channels_file', type=str, nargs='+') parser_update.set_defaults(func=update) args = parser.parse_args() args.func(args)