252 lines
10 KiB
Python
252 lines
10 KiB
Python
from __future__ import annotations
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from typing import Dict, Generator, List, Optional, Tuple
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import argparse
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import asyncio
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import contextlib
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import json
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import os
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import re
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import subprocess
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import sys
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import tempfile
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class CalledProcessError(Exception):
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process: asyncio.subprocess.Process
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stderr: Optional[bytes]
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class UpdateFailedException(Exception):
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pass
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def eprint(*args, **kwargs):
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print(*args, file=sys.stderr, **kwargs)
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async def check_subprocess_output(*args, **kwargs):
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"""
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Emulate check and capture_output arguments of subprocess.run function.
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"""
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process = await asyncio.create_subprocess_exec(*args, **kwargs)
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# We need to use communicate() instead of wait(), as the OS pipe buffers
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# can fill up and cause a deadlock.
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stdout, stderr = await process.communicate()
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if process.returncode != 0:
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error = CalledProcessError()
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error.process = process
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error.stderr = stderr
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raise error
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return stdout
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async def run_update_script(nixpkgs_root: str, merge_lock: asyncio.Lock, temp_dir: Optional[Tuple[str, str]], package: Dict, keep_going: bool):
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worktree: Optional[str] = None
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update_script_command = package['updateScript']
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if temp_dir is not None:
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worktree, _branch = temp_dir
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# Ensure the worktree is clean before update.
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await check_subprocess_output('git', 'reset', '--hard', '--quiet', 'HEAD', cwd=worktree)
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# Update scripts can use $(dirname $0) to get their location but we want to run
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# their clones in the git worktree, not in the main nixpkgs repo.
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update_script_command = map(lambda arg: re.sub(r'^{0}'.format(re.escape(nixpkgs_root)), worktree, arg), update_script_command)
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eprint(f" - {package['name']}: UPDATING ...")
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try:
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update_info = await check_subprocess_output(
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'env',
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f"UPDATE_NIX_NAME={package['name']}",
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f"UPDATE_NIX_PNAME={package['pname']}",
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f"UPDATE_NIX_OLD_VERSION={package['oldVersion']}",
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f"UPDATE_NIX_ATTR_PATH={package['attrPath']}",
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*update_script_command,
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stdout=asyncio.subprocess.PIPE,
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stderr=asyncio.subprocess.PIPE,
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cwd=worktree,
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)
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await merge_changes(merge_lock, package, update_info, temp_dir)
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except KeyboardInterrupt as e:
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eprint('Cancelling…')
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raise asyncio.exceptions.CancelledError()
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except CalledProcessError as e:
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eprint(f" - {package['name']}: ERROR")
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eprint()
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eprint(f"--- SHOWING ERROR LOG FOR {package['name']} ----------------------")
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eprint()
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eprint(e.stderr.decode('utf-8'))
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with open(f"{package['pname']}.log", 'wb') as logfile:
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logfile.write(e.stderr)
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eprint()
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eprint(f"--- SHOWING ERROR LOG FOR {package['name']} ----------------------")
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if not keep_going:
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raise UpdateFailedException(f"The update script for {package['name']} failed with exit code {e.process.returncode}")
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@contextlib.contextmanager
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def make_worktree() -> Generator[Tuple[str, str], None, None]:
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with tempfile.TemporaryDirectory() as wt:
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branch_name = f'update-{os.path.basename(wt)}'
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target_directory = f'{wt}/nixpkgs'
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subprocess.run(['git', 'worktree', 'add', '-b', branch_name, target_directory])
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try:
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yield (target_directory, branch_name)
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finally:
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subprocess.run(['git', 'worktree', 'remove', '--force', target_directory])
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subprocess.run(['git', 'branch', '-D', branch_name])
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async def commit_changes(name: str, merge_lock: asyncio.Lock, worktree: str, branch: str, changes: List[Dict]) -> None:
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for change in changes:
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# Git can only handle a single index operation at a time
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async with merge_lock:
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await check_subprocess_output('git', 'add', *change['files'], cwd=worktree)
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commit_message = '{attrPath}: {oldVersion} -> {newVersion}'.format(**change)
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if 'commitMessage' in change:
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commit_message = change['commitMessage']
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elif 'commitBody' in change:
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commit_message = commit_message + '\n\n' + change['commitBody']
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await check_subprocess_output('git', 'commit', '--quiet', '-m', commit_message, cwd=worktree)
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await check_subprocess_output('git', 'cherry-pick', branch)
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async def check_changes(package: Dict, worktree: str, update_info: str):
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if 'commit' in package['supportedFeatures']:
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changes = json.loads(update_info)
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else:
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changes = [{}]
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# Try to fill in missing attributes when there is just a single change.
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if len(changes) == 1:
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# Dynamic data from updater take precedence over static data from passthru.updateScript.
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if 'attrPath' not in changes[0]:
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# update.nix is always passing attrPath
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changes[0]['attrPath'] = package['attrPath']
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if 'oldVersion' not in changes[0]:
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# update.nix is always passing oldVersion
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changes[0]['oldVersion'] = package['oldVersion']
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if 'newVersion' not in changes[0]:
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attr_path = changes[0]['attrPath']
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obtain_new_version_output = await check_subprocess_output('nix-instantiate', '--expr', f'with import ./. {{}}; lib.getVersion {attr_path}', '--eval', '--strict', '--json', stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE, cwd=worktree)
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changes[0]['newVersion'] = json.loads(obtain_new_version_output.decode('utf-8'))
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if 'files' not in changes[0]:
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changed_files_output = await check_subprocess_output('git', 'diff', '--name-only', 'HEAD', stdout=asyncio.subprocess.PIPE, cwd=worktree)
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changed_files = changed_files_output.splitlines()
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changes[0]['files'] = changed_files
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if len(changed_files) == 0:
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return []
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return changes
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async def merge_changes(merge_lock: asyncio.Lock, package: Dict, update_info: str, temp_dir: Optional[Tuple[str, str]]) -> None:
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if temp_dir is not None:
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worktree, branch = temp_dir
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changes = await check_changes(package, worktree, update_info)
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if len(changes) > 0:
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await commit_changes(package['name'], merge_lock, worktree, branch, changes)
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else:
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eprint(f" - {package['name']}: DONE, no changes.")
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else:
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eprint(f" - {package['name']}: DONE.")
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async def updater(nixpkgs_root: str, temp_dir: Optional[Tuple[str, str]], merge_lock: asyncio.Lock, packages_to_update: asyncio.Queue[Optional[Dict]], keep_going: bool, commit: bool):
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while True:
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package = await packages_to_update.get()
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if package is None:
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# A sentinel received, we are done.
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return
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if not ('commit' in package['supportedFeatures'] or 'attrPath' in package):
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temp_dir = None
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await run_update_script(nixpkgs_root, merge_lock, temp_dir, package, keep_going)
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async def start_updates(max_workers: int, keep_going: bool, commit: bool, packages: List[Dict]):
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merge_lock = asyncio.Lock()
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packages_to_update: asyncio.Queue[Optional[Dict]] = asyncio.Queue()
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with contextlib.ExitStack() as stack:
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temp_dirs: List[Optional[Tuple[str, str]]] = []
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# Do not create more workers than there are packages.
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num_workers = min(max_workers, len(packages))
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nixpkgs_root_output = await check_subprocess_output('git', 'rev-parse', '--show-toplevel', stdout=asyncio.subprocess.PIPE)
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nixpkgs_root = nixpkgs_root_output.decode('utf-8').strip()
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# Set up temporary directories when using auto-commit.
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for i in range(num_workers):
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temp_dir = stack.enter_context(make_worktree()) if commit else None
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temp_dirs.append(temp_dir)
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# Fill up an update queue,
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for package in packages:
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await packages_to_update.put(package)
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# Add sentinels, one for each worker.
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# A workers will terminate when it gets sentinel from the queue.
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for i in range(num_workers):
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await packages_to_update.put(None)
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# Prepare updater workers for each temp_dir directory.
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# At most `num_workers` instances of `run_update_script` will be running at one time.
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updaters = asyncio.gather(*[updater(nixpkgs_root, temp_dir, merge_lock, packages_to_update, keep_going, commit) for temp_dir in temp_dirs])
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try:
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# Start updater workers.
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await updaters
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except asyncio.exceptions.CancelledError:
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# When one worker is cancelled, cancel the others too.
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updaters.cancel()
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except UpdateFailedException as e:
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# When one worker fails, cancel the others, as this exception is only thrown when keep_going is false.
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updaters.cancel()
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eprint(e)
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sys.exit(1)
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def main(max_workers: int, keep_going: bool, commit: bool, packages_path: str, skip_prompt: bool) -> None:
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with open(packages_path) as f:
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packages = json.load(f)
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eprint()
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eprint('Going to be running update for following packages:')
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for package in packages:
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eprint(f" - {package['name']}")
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eprint()
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confirm = '' if skip_prompt else input('Press Enter key to continue...')
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if confirm == '':
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eprint()
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eprint('Running update for:')
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asyncio.run(start_updates(max_workers, keep_going, commit, packages))
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eprint()
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eprint('Packages updated!')
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sys.exit()
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else:
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eprint('Aborting!')
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sys.exit(130)
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parser = argparse.ArgumentParser(description='Update packages')
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parser.add_argument('--max-workers', '-j', dest='max_workers', type=int, help='Number of updates to run concurrently', nargs='?', default=4)
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parser.add_argument('--keep-going', '-k', dest='keep_going', action='store_true', help='Do not stop after first failure')
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parser.add_argument('--commit', '-c', dest='commit', action='store_true', help='Commit the changes')
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parser.add_argument('packages', help='JSON file containing the list of package names and their update scripts')
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parser.add_argument('--skip-prompt', '-s', dest='skip_prompt', action='store_true', help='Do not stop for prompts')
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if __name__ == '__main__':
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args = parser.parse_args()
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try:
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main(args.max_workers, args.keep_going, args.commit, args.packages, args.skip_prompt)
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except KeyboardInterrupt as e:
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# Let’s cancel outside of the main loop too.
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sys.exit(130)
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