Mercurial > hg
view contrib/pull_logger.py @ 49680:40e24d82b513
delta-find: make sure we only use newer full snapshot as candidate
The current code does not needs to protect against this, as there are no older
snapshot in the current cache. However as we are getting ready to reuse this
cache from one revision to another, we need the code to protect itself about
what's coming.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Sun, 06 Nov 2022 17:55:55 -0500 |
parents | 946c023212b8 |
children |
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# pull_logger.py - Logs pulls to a JSON-line file in the repo's VFS. # # Copyright 2022 Pacien TRAN-GIRARD <pacien.trangirard@pacien.net> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. '''logs pull parameters to a file This extension logs the pull parameters, i.e. the remote and common heads, when pulling from the local repository. The collected data should give an idea of the state of a pair of repositories and allow replaying past synchronisations between them. This is particularly useful for working on data exchange, bundling and caching-related optimisations. The record is a JSON-line file located in the repository's VFS at .hg/pull_log.jsonl. Log write failures are not considered fatal: log writes may be skipped for any reason such as insufficient storage or a timeout. Some basic log file rotation can be enabled by setting 'rotate-size' to a value greater than 0. This causes the current log file to be moved to .hg/pull_log.jsonl.rotated when this threshold is met, discarding any previously rotated log file. The timeouts of the exclusive lock used when writing to the lock file can be configured through the 'timeout.lock' and 'timeout.warn' options of this plugin. Those are not expected to be held for a significant time in practice.:: [pull-logger] timeout.lock = 300 timeout.warn = 100 rotate-size = 1kb ''' import json import time from mercurial.i18n import _ from mercurial.utils import stringutil from mercurial import ( error, extensions, lock, registrar, wireprotov1server, ) EXT_NAME = b'pull-logger' EXT_VERSION_CODE = 0 LOG_FILE = b'pull_log.jsonl' OLD_LOG_FILE = LOG_FILE + b'.rotated' LOCK_NAME = LOG_FILE + b'.lock' configtable = {} configitem = registrar.configitem(configtable) configitem(EXT_NAME, b'timeout.lock', default=600) configitem(EXT_NAME, b'timeout.warn', default=120) configitem(EXT_NAME, b'rotate-size', default=b'100MB') def wrap_getbundle(orig, repo, proto, others, *args, **kwargs): heads, common = extract_pull_heads(others) log_entry = { 'timestamp': time.time(), 'logger_version': EXT_VERSION_CODE, 'heads': sorted(heads), 'common': sorted(common), } try: write_to_log(repo, log_entry) except (IOError, error.LockError) as err: msg = stringutil.forcebytestr(err) repo.ui.warn(_(b'unable to append to pull log: %s\n') % msg) return orig(repo, proto, others, *args, **kwargs) def extract_pull_heads(bundle_args): opts = wireprotov1server.options( b'getbundle', wireprotov1server.wireprototypes.GETBUNDLE_ARGUMENTS.keys(), bundle_args.copy(), # this call consumes the args destructively ) heads = opts.get(b'heads', b'').decode('utf-8').split(' ') common = opts.get(b'common', b'').decode('utf-8').split(' ') return (heads, common) def write_to_log(repo, entry): locktimeout = repo.ui.configint(EXT_NAME, b'timeout.lock') lockwarntimeout = repo.ui.configint(EXT_NAME, b'timeout.warn') rotatesize = repo.ui.configbytes(EXT_NAME, b'rotate-size') with lock.trylock( ui=repo.ui, vfs=repo.vfs, lockname=LOCK_NAME, timeout=locktimeout, warntimeout=lockwarntimeout, ): if rotatesize > 0 and repo.vfs.exists(LOG_FILE): if repo.vfs.stat(LOG_FILE).st_size >= rotatesize: repo.vfs.rename(LOG_FILE, OLD_LOG_FILE) with repo.vfs.open(LOG_FILE, b'a+') as logfile: serialised = json.dumps(entry, sort_keys=True) logfile.write(serialised.encode('utf-8')) logfile.write(b'\n') logfile.flush() def reposetup(ui, repo): if repo.local(): repo._wlockfreeprefix.add(LOG_FILE) repo._wlockfreeprefix.add(OLD_LOG_FILE) def uisetup(ui): del wireprotov1server.commands[b'getbundle'] decorator = wireprotov1server.wireprotocommand( name=b'getbundle', args=b'*', permission=b'pull', ) extensions.wrapfunction( container=wireprotov1server, funcname='getbundle', wrapper=wrap_getbundle, ) decorator(wireprotov1server.getbundle)