+from abc import ABC, abstractmethod
import argparse
import configparser
import filecmp
Dict,
Iterable,
List,
+ Mapping,
+ NamedTuple,
NewType,
Tuple,
+ Type,
+ Union,
)
# Use xdg module when it's less painful to have as a dependency
url: str
-class SearchPath(types.SimpleNamespace):
+class AliasPin(NamedTuple):
+ pass
+
+
+class GitPin(NamedTuple):
+ git_revision: str
release_name: str
-class Channel(SearchPath):
+class ChannelPin(NamedTuple):
+ git_revision: str
+ release_name: str
+ tarball_url: str
+ tarball_sha256: str
+
+
+Pin = Union[AliasPin, GitPin, ChannelPin]
+
+
+class SearchPath(types.SimpleNamespace, ABC):
+
+ @abstractmethod
+ def pin(self, v: Verification) -> Pin:
+ pass
+
+
+class AliasSearchPath(SearchPath):
alias_of: str
+
+ def pin(self, v: Verification) -> AliasPin:
+ assert not hasattr(self, 'git_repo')
+ return AliasPin()
+
+
+# (This lint-disable is for pylint bug https://github.com/PyCQA/pylint/issues/179
+# which is fixed in pylint 2.5.)
+class TarrableSearchPath(SearchPath, ABC): # pylint: disable=abstract-method
channel_html: bytes
channel_url: str
forwarded_url: str
git_ref: str
git_repo: str
- git_revision: str
old_git_revision: str
table: Dict[str, ChannelTableEntry]
- def pin(self, v: Verification, conf: configparser.SectionProxy) -> None:
- if hasattr(self, 'alias_of'):
- assert not hasattr(self, 'git_repo')
- return
+class GitSearchPath(TarrableSearchPath):
+ def pin(self, v: Verification) -> GitPin:
+ if hasattr(self, 'git_revision'):
+ self.old_git_revision = self.git_revision
+ del self.git_revision
+
+ git_fetch(v, self)
+ return GitPin(release_name=git_revision_name(v, self),
+ git_revision=self.git_revision)
+
+ def fetch(self, 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)
+
+ ensure_git_rev_available(v, self)
+ return git_get_tarball(v, self)
+
+
+class ChannelSearchPath(TarrableSearchPath):
+ def pin(self, v: Verification) -> ChannelPin:
if hasattr(self, 'git_revision'):
self.old_git_revision = self.git_revision
del self.git_revision
- if 'channel_url' in conf:
- pin_channel(v, self)
- conf['release_name'] = self.release_name
- conf['tarball_url'] = self.table['nixexprs.tar.xz'].absolute_url
- conf['tarball_sha256'] = self.table['nixexprs.tar.xz'].digest
- else:
- git_fetch(v, self)
- conf['release_name'] = git_revision_name(v, self)
- conf['git_revision'] = self.git_revision
+ pin_channel(v, self)
+ return ChannelPin(
+ release_name=self.release_name,
+ tarball_url=self.table['nixexprs.tar.xz'].absolute_url,
+ tarball_sha256=self.table['nixexprs.tar.xz'].digest,
+ git_revision=self.git_revision)
+
+ # Lint TODO: Put tarball_url and tarball_sha256 in ChannelSearchPath
+ # pylint: disable=no-self-use
+ def fetch(self, 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)
+
+ return fetch_with_nix_prefetch_url(
+ v, conf['tarball_url'], Digest16(
+ conf['tarball_sha256']))
def compare(a: str, b: str) -> Tuple[List[str], List[str], List[str]]:
return filecmp.cmpfiles(a, b, files, shallow=False)
-def fetch(v: Verification, channel: Channel) -> None:
+def fetch(v: Verification, channel: TarrableSearchPath) -> None:
v.status('Fetching channel')
request = urllib.request.urlopen(channel.channel_url, timeout=10)
channel.channel_html = request.read()
v.check('Got forwarded', channel.channel_url != channel.forwarded_url)
-def parse_channel(v: Verification, channel: Channel) -> None:
+def parse_channel(v: Verification, channel: TarrableSearchPath) -> None:
v.status('Parsing channel description as XML')
d = xml.dom.minidom.parseString(channel.channel_html)
v.ok()
return path # type: ignore # (for old mypy)
-def fetch_resources(v: Verification, channel: Channel) -> None:
+def fetch_resources(v: Verification, channel: TarrableSearchPath) -> None:
for resource in ['git-revision', 'nixexprs.tar.xz']:
fields = channel.table[resource]
fields.absolute_url = urllib.parse.urljoin(
digest_string(git_repo.encode()))
-def tarball_cache_file(channel: Channel) -> str:
+def tarball_cache_file(channel: TarrableSearchPath) -> str:
return os.path.join(
xdg.XDG_CACHE_HOME,
'pinch/git-tarball',
channel.release_name))
-def verify_git_ancestry(v: Verification, channel: Channel) -> None:
+def verify_git_ancestry(v: Verification, channel: TarrableSearchPath) -> None:
cachedir = git_cachedir(channel.git_repo)
v.status('Verifying rev is an ancestor of ref')
process = subprocess.run(['git',
v.result(process.returncode == 0)
-def git_fetch(v: Verification, channel: Channel) -> None:
+def git_fetch(v: Verification, channel: TarrableSearchPath) -> 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
verify_git_ancestry(v, channel)
-def ensure_git_rev_available(v: Verification, channel: Channel) -> None:
+def ensure_git_rev_available(
+ v: Verification,
+ channel: TarrableSearchPath) -> None:
cachedir = git_cachedir(channel.git_repo)
if os.path.exists(cachedir):
v.status('Checking if we already have this rev:')
def compare_tarball_and_git(
v: Verification,
- channel: Channel,
+ channel: TarrableSearchPath,
channel_contents: str,
git_contents: str) -> None:
v.status('Comparing channel tarball with git checkout')
len(benign_errors) == len(expected_errors))
-def extract_tarball(v: Verification, channel: Channel, dest: str) -> None:
+def extract_tarball(
+ v: Verification,
+ channel: TarrableSearchPath,
+ dest: str) -> None:
v.status('Extracting tarball %s' %
channel.table['nixexprs.tar.xz'].file)
shutil.unpack_archive(
v.ok()
-def git_checkout(v: Verification, channel: Channel, dest: str) -> None:
+def git_checkout(
+ v: Verification,
+ channel: TarrableSearchPath,
+ dest: str) -> None:
v.status('Checking out corresponding git revision')
git = subprocess.Popen(['git',
'-C',
v.result(git.returncode == 0 and tar.returncode == 0)
-def git_get_tarball(v: Verification, channel: Channel) -> str:
+def git_get_tarball(v: Verification, channel: TarrableSearchPath) -> str:
cache_file = tarball_cache_file(channel)
if os.path.exists(cache_file):
cached_tarball = open(cache_file).read(9999)
def check_channel_metadata(
v: Verification,
- channel: Channel,
+ channel: TarrableSearchPath,
channel_contents: str) -> None:
v.status('Verifying git commit in channel tarball')
v.result(
v.result(channel.release_name.endswith(version_suffix))
-def check_channel_contents(v: Verification, channel: Channel) -> None:
+def check_channel_contents(
+ v: Verification,
+ channel: TarrableSearchPath) -> None:
with tempfile.TemporaryDirectory() as channel_contents, \
tempfile.TemporaryDirectory() as git_contents:
v.ok()
-def pin_channel(v: Verification, channel: Channel) -> None:
+def pin_channel(v: Verification, channel: TarrableSearchPath) -> None:
fetch(v, channel)
parse_channel(v, channel)
fetch_resources(v, channel)
check_channel_contents(v, channel)
-def git_revision_name(v: Verification, channel: Channel) -> str:
+def git_revision_name(v: Verification, channel: TarrableSearchPath) -> str:
v.status('Getting commit date')
process = subprocess.run(['git',
'-C',
process.stdout.decode().strip())
-def read_search_path(conf: configparser.SectionProxy) -> Channel:
- return Channel(**dict(conf.items()))
+def read_search_path(conf: configparser.SectionProxy) -> SearchPath:
+ mapping: Mapping[str, Type[SearchPath]] = {
+ 'alias': AliasSearchPath,
+ 'channel': ChannelSearchPath,
+ 'git': GitSearchPath,
+ }
+ return mapping[conf['type']](**dict(conf.items()))
def read_config(filename: str) -> configparser.ConfigParser:
return config
+def read_config_files(
+ filenames: Iterable[str]) -> Dict[str, configparser.SectionProxy]:
+ merged_config: Dict[str, configparser.SectionProxy] = {}
+ for file in filenames:
+ config = read_config(file)
+ for section in config.sections():
+ if section in merged_config:
+ raise Exception('Duplicate channel "%s"' % section)
+ merged_config[section] = config[section]
+ return merged_config
+
+
def pin(args: argparse.Namespace) -> None:
v = Verification()
config = read_config(args.channels_file)
if args.channels and section not in args.channels:
continue
- channel = read_search_path(config[section])
+ sp = read_search_path(config[section])
- channel.pin(v, config[section])
+ config[section].update(sp.pin(v)._asdict())
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 = read_search_path(conf)
- 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'])]
+ config = read_config_files(args.channels_file)
+ for section in config:
+ sp = read_search_path(config[section])
+ if isinstance(sp, AliasSearchPath):
+ assert 'git_repo' not in config[section]
+ continue
+ tarball = sp.fetch(v, section, config[section])
+ exprs[section] = (
+ 'f: f { name = "%s"; channelName = "%%s"; src = builtins.storePath "%s"; }' %
+ (config[section]['release_name'], tarball))
+
+ for section in config:
+ if 'alias_of' in config[section]:
+ exprs[section] = exprs[str(config[section]['alias_of'])]
command = [
'nix-env',
projects / pinch / blobdiff