import configparser
import filecmp
import functools
+import getpass
import hashlib
import operator
import os
import os.path
+import shlex
import shutil
import subprocess
+import sys
import tempfile
import types
import urllib.parse
Tuple,
)
+import xdg
+
+
Digest16 = NewType('Digest16', str)
Digest32 = NewType('Digest32', str)
class Channel(types.SimpleNamespace):
+ alias_of: str
channel_html: bytes
channel_url: str
forwarded_url: str
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
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()
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' %
- 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:
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')
+ with open(output_filename, 'w') as output_file:
+ v.status(
+ 'Generating tarball for git revision %s' %
+ channel.git_revision)
+ git = subprocess.Popen(['git',
+ '-C',
+ git_cachedir(channel.git_repo),
+ 'archive',
+ '--prefix=%s/' % channel.release_name,
+ channel.git_revision],
+ stdout=subprocess.PIPE)
+ xz = subprocess.Popen(['xz'], stdin=git.stdout, stdout=output_file)
+ xz.wait()
+ git.wait()
+ v.result(git.returncode == 0 and xz.returncode == 0)
+
+ v.status('Putting tarball in Nix store')
+ process = subprocess.run(
+ ['nix-store', '--add', output_filename], capture_output=True)
+ v.result(process.returncode == 0)
+ 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(
v: Verification,
channel: Channel,
'--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 make_channel(conf: configparser.SectionProxy) -> Channel:
- channel = Channel(**dict(conf.items()))
- if hasattr(channel, 'git_revision'):
- channel.old_git_revision = channel.git_revision
- del channel.git_revision
- return channel
+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():
- channel = make_channel(config[section])
+ 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
+
if 'channel_url' in config[section]:
pin_channel(v, channel)
- config[section]['name'] = channel.release_name
+ config[section]['release_name'] = channel.release_name
config[section]['tarball_url'] = channel.table['nixexprs.tar.xz'].absolute_url
config[section]['tarball_sha256'] = channel.table['nixexprs.tar.xz'].digest
else:
git_fetch(v, channel)
- config[section]['name'] = git_revision_name(v, channel)
+ config[section]['release_name'] = git_revision_name(v, channel)
config[section]['git_revision'] = channel.git_revision
with open(args.channels_file, 'w') as configfile:
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()
+ 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',
+ '/nix/var/nix/profiles/per-user/%s/channels' %
+ getpass.getuser(),
+ '--show-trace',
+ '--file',
+ '<nix/unpack-channel.nix>',
+ '--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:
parser = argparse.ArgumentParser(prog='pinch')
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('--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)
projects / pinch / blobdiff