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
class Channel(types.SimpleNamespace):
+ alias_of: str
channel_html: bytes
channel_url: str
forwarded_url: str
- git_cachedir: str
git_ref: str
git_repo: str
git_revision: 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()
channel.table['git-revision'].file).read(999) == channel.git_revision)
-def git_fetch(v: Verification, channel: Channel) -> None:
- # It would be nice if we could share the nix git cache, but as of the time
- # of writing it is transitioning from gitv2 (deprecated) to gitv3 (not ready
- # yet), and trying to straddle them both is too far into nix implementation
- # details for my comfort. So we re-implement here half of nix.fetchGit.
- # :(
-
+def git_cachedir(git_repo: str) -> str:
# TODO: Consider using pyxdg to find this path.
- channel.git_cachedir = os.path.expanduser(
- '~/.cache/nix-pin-channel/git/%s' %
+ return os.path.expanduser(
+ '~/.cache/pinch/git/%s' %
digest_string(
- channel.git_repo.encode()))
- if not os.path.exists(channel.git_cachedir):
- v.status("Initializing git repo")
- process = subprocess.run(
- ['git', 'init', '--bare', channel.git_cachedir])
- v.result(process.returncode == 0)
+ git_repo.encode()))
- have_rev = False
- if hasattr(channel, 'git_revision'):
- v.status('Checking if we already have this rev:')
- process = subprocess.run(
- ['git', '-C', channel.git_cachedir, 'cat-file', '-e', channel.git_revision])
- if process.returncode == 0:
- v.status('yes')
- if process.returncode == 1:
- v.status('no')
- v.result(process.returncode == 0 or process.returncode == 1)
- have_rev = process.returncode == 0
-
- if not have_rev:
- v.status(
- 'Fetching ref "%s" from %s' %
- (channel.git_ref, channel.git_repo))
- # We don't use --force here because we want to abort and freak out if forced
- # updates are happening.
- process = subprocess.run(['git',
- '-C',
- channel.git_cachedir,
- 'fetch',
- channel.git_repo,
- '%s:%s' % (channel.git_ref,
- channel.git_ref)])
- v.result(process.returncode == 0)
- if hasattr(channel, 'git_revision'):
- v.status('Verifying that fetch retrieved this rev')
- process = subprocess.run(
- ['git', '-C', channel.git_cachedir, 'cat-file', '-e', channel.git_revision])
- v.result(process.returncode == 0)
-
- if not hasattr(channel, 'git_revision'):
- channel.git_revision = open(
- os.path.join(
- channel.git_cachedir,
- 'refs',
- 'heads',
- channel.git_ref)).read(999).strip()
+def verify_git_ancestry(v: Verification, channel: Channel) -> None:
+ cachedir = git_cachedir(channel.git_repo)
v.status('Verifying rev is an ancestor of ref')
process = subprocess.run(['git',
'-C',
- channel.git_cachedir,
+ cachedir,
'merge-base',
'--is-ancestor',
channel.git_revision,
channel.old_git_revision)
process = subprocess.run(['git',
'-C',
- channel.git_cachedir,
+ cachedir,
'merge-base',
'--is-ancestor',
channel.old_git_revision,
v.result(process.returncode == 0)
+def git_fetch(v: Verification, channel: Channel) -> None:
+ # It would be nice if we could share the nix git cache, but as of the time
+ # of writing it is transitioning from gitv2 (deprecated) to gitv3 (not ready
+ # yet), and trying to straddle them both is too far into nix implementation
+ # details for my comfort. So we re-implement here half of nix.fetchGit.
+ # :(
+
+ cachedir = git_cachedir(channel.git_repo)
+ if not os.path.exists(cachedir):
+ v.status("Initializing git repo")
+ process = subprocess.run(
+ ['git', 'init', '--bare', cachedir])
+ v.result(process.returncode == 0)
+
+ v.status('Fetching ref "%s" from %s' % (channel.git_ref, channel.git_repo))
+ # We don't use --force here because we want to abort and freak out if forced
+ # updates are happening.
+ process = subprocess.run(['git',
+ '-C',
+ cachedir,
+ 'fetch',
+ channel.git_repo,
+ '%s:%s' % (channel.git_ref,
+ channel.git_ref)])
+ v.result(process.returncode == 0)
+
+ if hasattr(channel, 'git_revision'):
+ v.status('Verifying that fetch retrieved this rev')
+ process = subprocess.run(
+ ['git', '-C', cachedir, 'cat-file', '-e', channel.git_revision])
+ v.result(process.returncode == 0)
+ else:
+ channel.git_revision = open(
+ os.path.join(
+ cachedir,
+ 'refs',
+ 'heads',
+ channel.git_ref)).read(999).strip()
+
+ verify_git_ancestry(v, channel)
+
+
+def ensure_git_rev_available(v: Verification, channel: Channel) -> None:
+ cachedir = git_cachedir(channel.git_repo)
+ if os.path.exists(cachedir):
+ v.status('Checking if we already have this rev:')
+ process = subprocess.run(
+ ['git', '-C', cachedir, 'cat-file', '-e', channel.git_revision])
+ if process.returncode == 0:
+ v.status('yes')
+ if process.returncode == 1:
+ v.status('no')
+ v.result(process.returncode == 0 or process.returncode == 1)
+ if process.returncode == 0:
+ verify_git_ancestry(v, channel)
+ return
+ git_fetch(v, channel)
+
+
def compare_tarball_and_git(
v: Verification,
channel: Channel,
v.status('Checking out corresponding git revision')
git = subprocess.Popen(['git',
'-C',
- channel.git_cachedir,
+ git_cachedir(channel.git_repo),
'archive',
channel.git_revision],
stdout=subprocess.PIPE)
v.result(git.returncode == 0 and tar.returncode == 0)
+def git_get_tarball(v: Verification, channel: Channel) -> str:
+ 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)
+ return process.stdout.decode().strip()
+
+
def check_channel_metadata(
v: Verification,
channel: Channel,
fetch(v, channel)
parse_channel(v, channel)
fetch_resources(v, channel)
- git_fetch(v, channel)
+ ensure_git_rev_available(v, channel)
check_channel_contents(v, channel)
v.status('Getting commit date')
process = subprocess.run(['git',
'-C',
- channel.git_cachedir,
+ git_cachedir(channel.git_repo),
'lo',
'-n1',
'--format=%ct-%h',
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 update(args: argparse.Namespace) -> None:
+ v = Verification()
+ config = configparser.ConfigParser()
+ exprs = {}
+ 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)
+
+ 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]:
+ 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