import shutil
import subprocess
import sys
+import tarfile
import tempfile
import types
import urllib.parse
import xml.dom.minidom
from typing import (
+ Callable,
Dict,
Iterable,
List,
pass
+class SymlinkPin(NamedTuple):
+ @property
+ def release_name(self) -> str:
+ return 'link'
+
+
class GitPin(NamedTuple):
git_revision: str
release_name: str
tarball_sha256: str
-Pin = Union[AliasPin, GitPin, ChannelPin]
+Pin = Union[AliasPin, SymlinkPin, GitPin, ChannelPin]
+
+
+def copy_to_nix_store(v: Verification, filename: str) -> str:
+ v.status('Putting tarball in Nix store')
+ process = subprocess.run(
+ ['nix-store', '--add', filename], stdout=subprocess.PIPE)
+ v.result(process.returncode == 0)
+ return process.stdout.decode().strip() # type: ignore # (for old mypy)
+
+
+def symlink_archive(v: Verification, path: str) -> str:
+ with tempfile.TemporaryDirectory() as td:
+ archive_filename = os.path.join(td, 'link.tar.gz')
+ os.symlink(path, os.path.join(td, 'link'))
+ with tarfile.open(archive_filename, mode='x:gz') as t:
+ t.add(os.path.join(td, 'link'), arcname='link')
+ return copy_to_nix_store(v, archive_filename)
class AliasSearchPath(NamedTuple):
return AliasPin()
+class SymlinkSearchPath(NamedTuple):
+ path: str
+
+ # pylint: disable=no-self-use
+ def pin(self, _: Verification, __: Optional[Pin]) -> SymlinkPin:
+ return SymlinkPin()
+
+ def fetch(self, v: Verification, _: Pin) -> str:
+ return symlink_archive(v, self.path)
+
+
class GitSearchPath(NamedTuple):
git_ref: str
git_repo: str
v, pin.tarball_url, Digest16(pin.tarball_sha256))
-SearchPath = Union[AliasSearchPath, GitSearchPath, ChannelSearchPath]
+SearchPath = Union[AliasSearchPath,
+ SymlinkSearchPath,
+ GitSearchPath,
+ ChannelSearchPath]
TarrableSearchPath = Union[GitSearchPath, ChannelSearchPath]
v: Verification, channel: ChannelSearchPath) -> Tuple[str, str]:
v.status('Fetching channel')
request = urllib.request.urlopen(channel.channel_url, timeout=10)
- channel_html = request.read()
+ channel_html = request.read().decode()
forwarded_url = request.geturl()
v.result(request.status == 200) # type: ignore # (for old mypy)
v.check('Got forwarded', channel.channel_url != forwarded_url)
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], stdout=subprocess.PIPE)
- v.result(process.returncode == 0)
- store_tarball = process.stdout.decode().strip()
+ store_tarball = copy_to_nix_store(v, output_filename)
os.makedirs(os.path.dirname(cache_file), exist_ok=True)
open(cache_file, 'w').write(store_tarball)
V = TypeVar('V')
-def filter_dict(d: Dict[K, V], fields: Set[K]
- ) -> Tuple[Dict[K, V], Dict[K, V]]:
+def partition_dict(pred: Callable[[K, V], bool],
+ d: Dict[K, V]) -> Tuple[Dict[K, V], Dict[K, V]]:
selected: Dict[K, V] = {}
remaining: Dict[K, V] = {}
for k, v in d.items():
- if k in fields:
+ if pred(k, v):
selected[k] = v
else:
remaining[k] = v
return selected, remaining
+def filter_dict(d: Dict[K, V], fields: Set[K]
+ ) -> Tuple[Dict[K, V], Dict[K, V]]:
+ return partition_dict(lambda k, v: k in fields, d)
+
+
def read_config_section(
conf: configparser.SectionProxy) -> Tuple[SearchPath, Optional[Pin]]:
mapping: Mapping[str, Tuple[Type[SearchPath], Type[Pin]]] = {
'alias': (AliasSearchPath, AliasPin),
'channel': (ChannelSearchPath, ChannelPin),
'git': (GitSearchPath, GitPin),
+ 'symlink': (SymlinkSearchPath, SymlinkPin),
}
SP, P = mapping[conf['type']]
_, all_fields = filter_dict(dict(conf.items()), set(['type']))
pin_fields, remaining_fields = filter_dict(all_fields, set(P._fields))
# Error suppression works around https://github.com/python/mypy/issues/9007
pin_present = pin_fields != {} or P._fields == ()
- pin = P(**pin_fields) if pin_present else None # type:ignore[call-arg]
+ pin = P(**pin_fields) if pin_present else None # type: ignore
return SP(**remaining_fields), pin
+def read_pinned_config_section(
+ section: str, conf: configparser.SectionProxy) -> Tuple[SearchPath, Pin]:
+ sp, pin = read_config_section(conf)
+ if pin is None:
+ raise Exception(
+ 'Cannot update unpinned channel "%s" (Run "pin" before "update")' %
+ section)
+ return sp, pin
+
+
def read_config(filename: str) -> configparser.ConfigParser:
config = configparser.ConfigParser()
config.read_file(open(filename), filename)
def updateCommand(args: argparse.Namespace) -> None:
v = Verification()
exprs: Dict[str, str] = {}
- config = read_config_files(args.channels_file)
- for section in config:
- sp, pin = read_config_section(config[section])
- if pin is None:
- raise Exception(
- 'Cannot update unpinned channel "%s" (Run "pin" before "update")' %
- section)
- if isinstance(sp, AliasSearchPath):
- continue
+ config = {
+ section: read_pinned_config_section(section, conf) for section,
+ conf in read_config_files(
+ args.channels_file).items()}
+ alias, nonalias = partition_dict(
+ lambda k, v: isinstance(v[0], AliasSearchPath), config)
+
+ for section, (sp, pin) in nonalias.items():
+ assert not isinstance(sp, AliasSearchPath) # mypy can't see through
+ assert not isinstance(pin, AliasPin) # partition_dict()
tarball = sp.fetch(v, pin)
exprs[section] = (
'f: f { name = "%s"; channelName = "%%s"; src = builtins.storePath "%s"; }' %
- (config[section]['release_name'], tarball))
+ (pin.release_name, tarball))
- for section in config:
- if 'alias_of' in config[section]:
- exprs[section] = exprs[str(config[section]['alias_of'])]
+ for section, (sp, pin) in alias.items():
+ assert isinstance(sp, AliasSearchPath) # For mypy
+ exprs[section] = exprs[sp.alias_of]
command = [
'nix-env',
projects / pinch / blobdiff