X-Git-Url: http://git.scottworley.com/pinch/blobdiff_plain/96063a5164fcd9e6ec72c1912d41d77856fa980f..f9bfb2d0d1abda6434b0cc6dda70eec89910daa6:/pinch.py?ds=inline diff --git a/pinch.py b/pinch.py index 8c9e976..5eb7601 100644 --- a/pinch.py +++ b/pinch.py @@ -34,6 +34,8 @@ from typing import ( Union, ) +import git_cache + # Use xdg module when it's less painful to have as a dependency @@ -160,17 +162,17 @@ class GitSearchPath(NamedTuple): git_repo: str def pin(self, v: Verification, old_pin: Optional[Pin]) -> GitPin: + _, new_revision = git_cache.fetch(self.git_repo, self.git_ref) if old_pin is not None: assert isinstance(old_pin, GitPin) - old_revision = old_pin.git_revision if old_pin is not None else None - - new_revision = git_fetch(v, self, None, old_revision) + verify_git_ancestry(v, self, old_pin.git_revision, new_revision) return GitPin(release_name=git_revision_name(v, self, new_revision), git_revision=new_revision) def fetch(self, v: Verification, pin: Pin) -> str: assert isinstance(pin, GitPin) - ensure_git_rev_available(v, self, pin, None) + git_cache.ensure_rev_available( + self.git_repo, self.git_ref, pin.git_revision) return git_get_tarball(v, self, pin) @@ -182,12 +184,17 @@ class ChannelSearchPath(NamedTuple): def pin(self, v: Verification, old_pin: Optional[Pin]) -> ChannelPin: if old_pin is not None: assert isinstance(old_pin, ChannelPin) - old_revision = old_pin.git_revision if old_pin is not None else None channel_html, forwarded_url = fetch_channel(v, self) table, new_gitpin = parse_channel(v, channel_html) + if old_pin is not None and old_pin.git_revision == new_gitpin.git_revision: + return old_pin fetch_resources(v, new_gitpin, forwarded_url, table) - ensure_git_rev_available(v, self, new_gitpin, old_revision) + git_cache.ensure_rev_available( + self.git_repo, self.git_ref, new_gitpin.git_revision) + if old_pin is not None: + verify_git_ancestry( + v, self, old_pin.git_revision, new_gitpin.git_revision) check_channel_contents(v, self, table, new_gitpin) return ChannelPin( release_name=new_gitpin.release_name, @@ -343,13 +350,6 @@ def fetch_resources( v.result(open(table['git-revision'].file).read(999) == pin.git_revision) -def git_cachedir(git_repo: str) -> str: - return os.path.join( - xdg.XDG_CACHE_HOME, - 'pinch/git', - digest_string(git_repo.encode())) - - def tarball_cache_file(channel: TarrableSearchPath, pin: GitPin) -> str: return os.path.join( xdg.XDG_CACHE_HOME, @@ -363,101 +363,19 @@ def tarball_cache_file(channel: TarrableSearchPath, pin: GitPin) -> str: def verify_git_ancestry( v: Verification, channel: TarrableSearchPath, - new_revision: str, - old_revision: Optional[str]) -> None: - cachedir = git_cachedir(channel.git_repo) - v.status('Verifying rev is an ancestor of ref') + old_revision: str, + new_revision: str) -> None: + cachedir = git_cache.git_cachedir(channel.git_repo) + v.status('Verifying rev is an ancestor of previous rev %s' % old_revision) process = subprocess.run(['git', '-C', cachedir, 'merge-base', '--is-ancestor', - new_revision, - channel.git_ref]) - v.result(process.returncode == 0) - - if old_revision is not None: - v.status( - 'Verifying rev is an ancestor of previous rev %s' % - old_revision) - process = subprocess.run(['git', - '-C', - cachedir, - 'merge-base', - '--is-ancestor', - old_revision, - new_revision]) - v.result(process.returncode == 0) - - -def git_fetch( - v: Verification, - channel: TarrableSearchPath, - desired_revision: Optional[str], - old_revision: Optional[str]) -> str: - # 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)]) + old_revision, + new_revision]) v.result(process.returncode == 0) - if desired_revision is not None: - v.status('Verifying that fetch retrieved this rev') - process = subprocess.run( - ['git', '-C', cachedir, 'cat-file', '-e', desired_revision]) - v.result(process.returncode == 0) - - new_revision = open( - os.path.join( - cachedir, - 'refs', - 'heads', - channel.git_ref)).read(999).strip() - - verify_git_ancestry(v, channel, new_revision, old_revision) - - return new_revision - - -def ensure_git_rev_available( - v: Verification, - channel: TarrableSearchPath, - pin: GitPin, - old_revision: Optional[str]) -> 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', pin.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, pin.git_revision, old_revision) - return - git_fetch(v, channel, pin.git_revision, old_revision) - def compare_tarball_and_git( v: Verification, @@ -509,7 +427,7 @@ def git_checkout( v.status('Checking out corresponding git revision') git = subprocess.Popen(['git', '-C', - git_cachedir(channel.git_repo), + git_cache.git_cachedir(channel.git_repo), 'archive', pin.git_revision], stdout=subprocess.PIPE) @@ -541,7 +459,7 @@ def git_get_tarball( pin.git_revision) git = subprocess.Popen(['git', '-C', - git_cachedir(channel.git_repo), + git_cache.git_cachedir(channel.git_repo), 'archive', '--prefix=%s/' % pin.release_name, pin.git_revision], @@ -608,7 +526,7 @@ def git_revision_name( v.status('Getting commit date') process = subprocess.run(['git', '-C', - git_cachedir(channel.git_repo), + git_cache.git_cachedir(channel.git_repo), 'log', '-n1', '--format=%ct-%h', @@ -727,8 +645,7 @@ def updateCommand(args: argparse.Namespace) -> None: command = [ 'nix-env', '--profile', - '/nix/var/nix/profiles/per-user/%s/channels' % - getpass.getuser(), + args.profile, '--show-trace', '--file', '', @@ -751,6 +668,8 @@ def main() -> None: parser_pin.set_defaults(func=pinCommand) parser_update = subparsers.add_parser('update') parser_update.add_argument('--dry-run', action='store_true') + parser_update.add_argument('--profile', default=( + '/nix/var/nix/profiles/per-user/%s/channels' % getpass.getuser())) parser_update.add_argument('channels_file', type=str, nargs='+') parser_update.set_defaults(func=updateCommand) args = parser.parse_args()