X-Git-Url: http://git.scottworley.com/pinch/blobdiff_plain/f9cd7bdc50fad6c24ac226a6532ecfb81d78cbe2..0e5e611d13ab114528838b4ab50b0bf417303877:/pinch.py?ds=inline diff --git a/pinch.py b/pinch.py index c77d891..71496a3 100644 --- a/pinch.py +++ b/pinch.py @@ -1,3 +1,5 @@ +import argparse +import configparser import filecmp import functools import hashlib @@ -25,6 +27,7 @@ Digest32 = NewType('Digest32', str) class ChannelTableEntry(types.SimpleNamespace): + absolute_url: str digest: Digest16 file: str size: int @@ -33,14 +36,15 @@ class ChannelTableEntry(types.SimpleNamespace): class Channel(types.SimpleNamespace): channel_html: bytes + channel_url: str forwarded_url: str git_cachedir: str git_ref: str git_repo: str git_revision: str + old_git_revision: str release_name: str table: Dict[str, ChannelTableEntry] - url: str class VerificationError(Exception): @@ -108,11 +112,11 @@ def compare(a: str, b: str) -> Tuple[List[str], List[str], List[str]]: def fetch(v: Verification, channel: Channel) -> None: v.status('Fetching channel') - request = urllib.request.urlopen(channel.url, timeout=10) + request = urllib.request.urlopen(channel.channel_url, timeout=10) channel.channel_html = request.read() channel.forwarded_url = request.geturl() v.result(request.status == 200) - v.check('Got forwarded', channel.url != channel.forwarded_url) + v.check('Got forwarded', channel.channel_url != channel.forwarded_url) def parse_channel(v: Verification, channel: Channel) -> None: @@ -130,8 +134,8 @@ def parse_channel(v: Verification, channel: Channel) -> None: v.status('Extracting git commit:') git_commit_node = d.getElementsByTagName('tt')[0] - channel.git_commit = git_commit_node.firstChild.nodeValue - v.status(channel.git_commit) + channel.git_revision = git_commit_node.firstChild.nodeValue + v.status(channel.git_revision) v.ok() v.status('Verifying git commit label') v.result(git_commit_node.previousSibling.nodeValue == 'Git commit ') @@ -198,12 +202,14 @@ def fetch_with_nix_prefetch_url( def fetch_resources(v: Verification, channel: Channel) -> None: for resource in ['git-revision', 'nixexprs.tar.xz']: fields = channel.table[resource] - url = urllib.parse.urljoin(channel.forwarded_url, fields.url) - fields.file = fetch_with_nix_prefetch_url(v, url, fields.digest) + fields.absolute_url = urllib.parse.urljoin( + channel.forwarded_url, fields.url) + fields.file = fetch_with_nix_prefetch_url( + v, fields.absolute_url, fields.digest) v.status('Verifying git commit on main page matches git commit in table') v.result( open( - channel.table['git-revision'].file).read(999) == channel.git_commit) + channel.table['git-revision'].file).read(999) == channel.git_revision) def git_fetch(v: Verification, channel: Channel) -> None: @@ -217,23 +223,29 @@ def git_fetch(v: Verification, channel: Channel) -> None: channel.git_cachedir = os.path.expanduser( '~/.cache/nix-pin-channel/git/%s' % digest_string( - channel.url.encode())) + 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) - v.status('Checking if we already have this rev:') - process = subprocess.run( - ['git', '-C', channel.git_cachedir, 'cat-file', '-e', channel.git_commit]) - 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 == 1: - v.status('Fetching ref "%s"' % channel.git_ref) + 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', @@ -244,10 +256,19 @@ def git_fetch(v: Verification, channel: Channel) -> None: '%s:%s' % (channel.git_ref, channel.git_ref)]) v.result(process.returncode == 0) - v.status('Verifying that fetch retrieved this rev') - process = subprocess.run( - ['git', '-C', channel.git_cachedir, 'cat-file', '-e', channel.git_commit]) - 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() v.status('Verifying rev is an ancestor of ref') process = subprocess.run(['git', @@ -255,10 +276,23 @@ def git_fetch(v: Verification, channel: Channel) -> None: channel.git_cachedir, 'merge-base', '--is-ancestor', - channel.git_commit, + channel.git_revision, channel.git_ref]) v.result(process.returncode == 0) + if hasattr(channel, 'old_git_revision'): + v.status( + 'Verifying rev is an ancestor of previous rev %s' % + channel.old_git_revision) + process = subprocess.run(['git', + '-C', + channel.git_cachedir, + 'merge-base', + '--is-ancestor', + channel.old_git_revision, + channel.git_revision]) + v.result(process.returncode == 0) + def compare_tarball_and_git( v: Verification, @@ -308,7 +342,7 @@ def git_checkout(v: Verification, channel: Channel, dest: str) -> None: '-C', channel.git_cachedir, 'archive', - channel.git_commit], + channel.git_revision], stdout=subprocess.PIPE) tar = subprocess.Popen( ['tar', 'x', '-C', dest, '-f', '-'], stdin=git.stdout) @@ -328,7 +362,7 @@ def check_channel_metadata( os.path.join( channel_contents, channel.release_name, - '.git-revision')).read(999) == channel.git_commit) + '.git-revision')).read(999) == channel.git_revision) v.status( 'Verifying version-suffix is a suffix of release name %s:' % @@ -357,17 +391,48 @@ def check_channel_contents(v: Verification, channel: Channel) -> None: v.ok() -def main() -> None: - v = Verification() - channel = Channel(url='https://channels.nixos.org/nixos-20.03', - git_repo='https://github.com/NixOS/nixpkgs.git', - git_ref='nixos-20.03') +def pin_channel(v: Verification, channel: Channel) -> None: fetch(v, channel) parse_channel(v, channel) fetch_resources(v, channel) git_fetch(v, channel) check_channel_contents(v, channel) - print(channel) + + +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 pin(args: argparse.Namespace) -> None: + v = Verification() + config = configparser.ConfigParser() + config.read_file(open(args.channels_file), args.channels_file) + for section in config.sections(): + channel = make_channel(config[section]) + if 'channel_url' in config[section]: + pin_channel(v, channel) + 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]['git_revision'] = channel.git_revision + + with open(args.channels_file, 'w') as configfile: + config.write(configfile) + + +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.set_defaults(func=pin) + args = parser.parse_args() + args.func(args) main()