X-Git-Url: http://git.scottworley.com/pinch/blobdiff_plain/736c25ebc1f9814c84429ed9dd16cd23104576f5..0e515222756a52b6f6e617a5dba149d7422546d4:/pinch.py?ds=sidebyside diff --git a/pinch.py b/pinch.py index 5bb4e95..1827281 100644 --- a/pinch.py +++ b/pinch.py @@ -7,8 +7,10 @@ import hashlib import operator import os import os.path +import shlex import shutil import subprocess +import sys import tempfile import types import urllib.parse @@ -23,6 +25,9 @@ from typing import ( Tuple, ) +import xdg + + Digest16 = NewType('Digest16', str) Digest32 = NewType('Digest32', str) @@ -36,6 +41,7 @@ class ChannelTableEntry(types.SimpleNamespace): class Channel(types.SimpleNamespace): + alias_of: str channel_html: bytes channel_url: str forwarded_url: str @@ -57,7 +63,7 @@ class Verification: self.line_length = 0 def status(self, s: str) -> None: - print(s, end=' ', flush=True) + print(s, end=' ', file=sys.stderr, flush=True) self.line_length += 1 + len(s) # Unicode?? @staticmethod @@ -69,7 +75,7 @@ class Verification: length = len(message) cols = shutil.get_terminal_size().columns pad = (cols - (self.line_length + length)) % cols - print(' ' * pad + self._color(message, color)) + print(' ' * pad + self._color(message, color), file=sys.stderr) self.line_length = 0 if not r: raise VerificationError() @@ -213,9 +219,9 @@ 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/nix-pin-channel/git/%s' % + return os.path.join( + xdg.XDG_CACHE_HOME, + 'pinch/git', digest_string( git_repo.encode())) @@ -357,7 +363,8 @@ 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) @@ -448,18 +455,30 @@ def git_revision_name(v: Verification, channel: Channel) -> str: '--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 @@ -481,34 +500,53 @@ def pin(args: argparse.Namespace) -> None: 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)) - v.status('Installing channels with nix-env') - process = subprocess.run( - [ - 'nix-env', - '--profile', - '/nix/var/nix/profiles/per-user/%s/channels' % - getpass.getuser(), - '--show-trace', - '--file', - '', - '--install', - '--from-expression'] + - exprs) - v.result(process.returncode == 0) + 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 + + 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) + + 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', + '/nix/var/nix/profiles/per-user/%s/channels' % + getpass.getuser(), + '--show-trace', + '--file', + '', + '--install', + '--from-expression'] + [exprs[name] % name for name in sorted(exprs.keys())] + if args.dry_run: + print(' '.join(map(shlex.quote, command))) + else: + v.status('Installing channels with nix-env') + process = subprocess.run(command) + v.result(process.returncode == 0) def main() -> None: @@ -516,9 +554,11 @@ def main() -> None: subparsers = parser.add_subparsers(dest='mode', required=True) parser_pin = subparsers.add_parser('pin') parser_pin.add_argument('channels_file', type=str) + parser_pin.add_argument('channels', type=str, nargs='*') parser_pin.set_defaults(func=pin) parser_update = subparsers.add_parser('update') - parser_update.add_argument('channels_file', type=str) + parser_update.add_argument('--dry-run', action='store_true') + parser_update.add_argument('channels_file', type=str, nargs='+') parser_update.set_defaults(func=update) args = parser.parse_args() args.func(args)