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890 lines
30 KiB
Python
890 lines
30 KiB
Python
#!/usr/bin/env python
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# Copyright 2014 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""A git command for managing a local cache of git repositories."""
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from __future__ import print_function
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import contextlib
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import errno
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import logging
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import optparse
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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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import threading
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import time
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try:
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import urlparse
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except ImportError: # For Py3 compatibility
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import urllib.parse as urlparse
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import zipfile
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from download_from_google_storage import Gsutil
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import gclient_utils
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import subcommand
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# Analogous to gc.autopacklimit git config.
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GC_AUTOPACKLIMIT = 50
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GIT_CACHE_CORRUPT_MESSAGE = 'WARNING: The Git cache is corrupt.'
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try:
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# pylint: disable=undefined-variable
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WinErr = WindowsError
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except NameError:
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class WinErr(Exception):
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pass
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class LockError(Exception):
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pass
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class ClobberNeeded(Exception):
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pass
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def exponential_backoff_retry(fn, excs=(Exception,), name=None, count=10,
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sleep_time=0.25, printerr=None):
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"""Executes |fn| up to |count| times, backing off exponentially.
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Args:
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fn (callable): The function to execute. If this raises a handled
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exception, the function will retry with exponential backoff.
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excs (tuple): A tuple of Exception types to handle. If one of these is
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raised by |fn|, a retry will be attempted. If |fn| raises an Exception
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that is not in this list, it will immediately pass through. If |excs|
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is empty, the Exception base class will be used.
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name (str): Optional operation name to print in the retry string.
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count (int): The number of times to try before allowing the exception to
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pass through.
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sleep_time (float): The initial number of seconds to sleep in between
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retries. This will be doubled each retry.
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printerr (callable): Function that will be called with the error string upon
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failures. If None, |logging.warning| will be used.
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Returns: The return value of the successful fn.
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"""
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printerr = printerr or logging.warning
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for i in xrange(count):
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try:
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return fn()
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except excs as e:
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if (i+1) >= count:
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raise
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printerr('Retrying %s in %.2f second(s) (%d / %d attempts): %s' % (
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(name or 'operation'), sleep_time, (i+1), count, e))
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time.sleep(sleep_time)
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sleep_time *= 2
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class Lockfile(object):
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"""Class to represent a cross-platform process-specific lockfile."""
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def __init__(self, path, timeout=0):
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self.path = os.path.abspath(path)
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self.timeout = timeout
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self.lockfile = self.path + ".lock"
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self.pid = os.getpid()
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def _read_pid(self):
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"""Read the pid stored in the lockfile.
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Note: This method is potentially racy. By the time it returns the lockfile
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may have been unlocked, removed, or stolen by some other process.
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"""
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try:
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with open(self.lockfile, 'r') as f:
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pid = int(f.readline().strip())
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except (IOError, ValueError):
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pid = None
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return pid
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def _make_lockfile(self):
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"""Safely creates a lockfile containing the current pid."""
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open_flags = (os.O_CREAT | os.O_EXCL | os.O_WRONLY)
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fd = os.open(self.lockfile, open_flags, 0o644)
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f = os.fdopen(fd, 'w')
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print(self.pid, file=f)
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f.close()
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def _remove_lockfile(self):
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"""Delete the lockfile. Complains (implicitly) if it doesn't exist.
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See gclient_utils.py:rmtree docstring for more explanation on the
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windows case.
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"""
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if sys.platform == 'win32':
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lockfile = os.path.normcase(self.lockfile)
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def delete():
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exitcode = subprocess.call(['cmd.exe', '/c',
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'del', '/f', '/q', lockfile])
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if exitcode != 0:
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raise LockError('Failed to remove lock: %s' % (lockfile,))
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exponential_backoff_retry(
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delete,
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excs=(LockError,),
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name='del [%s]' % (lockfile,))
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else:
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os.remove(self.lockfile)
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def lock(self):
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"""Acquire the lock.
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This will block with a deadline of self.timeout seconds.
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"""
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elapsed = 0
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while True:
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try:
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self._make_lockfile()
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return
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except OSError as e:
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if elapsed < self.timeout:
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sleep_time = max(10, min(3, self.timeout - elapsed))
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logging.info('Could not create git cache lockfile; '
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'will retry after sleep(%d).', sleep_time);
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elapsed += sleep_time
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time.sleep(sleep_time)
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continue
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if e.errno == errno.EEXIST:
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raise LockError("%s is already locked" % self.path)
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else:
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raise LockError("Failed to create %s (err %s)" % (self.path, e.errno))
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def unlock(self):
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"""Release the lock."""
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try:
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if not self.is_locked():
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raise LockError("%s is not locked" % self.path)
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if not self.i_am_locking():
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raise LockError("%s is locked, but not by me" % self.path)
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self._remove_lockfile()
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except WinErr:
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# Windows is unreliable when it comes to file locking. YMMV.
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pass
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def break_lock(self):
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"""Remove the lock, even if it was created by someone else."""
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try:
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self._remove_lockfile()
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return True
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except OSError as exc:
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if exc.errno == errno.ENOENT:
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return False
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else:
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raise
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def is_locked(self):
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"""Test if the file is locked by anyone.
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Note: This method is potentially racy. By the time it returns the lockfile
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may have been unlocked, removed, or stolen by some other process.
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"""
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return os.path.exists(self.lockfile)
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def i_am_locking(self):
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"""Test if the file is locked by this process."""
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return self.is_locked() and self.pid == self._read_pid()
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class Mirror(object):
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git_exe = 'git.bat' if sys.platform.startswith('win') else 'git'
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gsutil_exe = os.path.join(
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os.path.dirname(os.path.abspath(__file__)), 'gsutil.py')
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cachepath_lock = threading.Lock()
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UNSET_CACHEPATH = object()
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# Used for tests
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_GIT_CONFIG_LOCATION = []
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@staticmethod
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def parse_fetch_spec(spec):
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"""Parses and canonicalizes a fetch spec.
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Returns (fetchspec, value_regex), where value_regex can be used
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with 'git config --replace-all'.
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"""
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parts = spec.split(':', 1)
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src = parts[0].lstrip('+').rstrip('/')
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if not src.startswith('refs/'):
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src = 'refs/heads/%s' % src
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dest = parts[1].rstrip('/') if len(parts) > 1 else src
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regex = r'\+%s:.*' % src.replace('*', r'\*')
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return ('+%s:%s' % (src, dest), regex)
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def __init__(self, url, refs=None, print_func=None):
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self.url = url
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self.fetch_specs = set([self.parse_fetch_spec(ref) for ref in (refs or [])])
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self.basedir = self.UrlToCacheDir(url)
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self.mirror_path = os.path.join(self.GetCachePath(), self.basedir)
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if print_func:
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self.print = self.print_without_file
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self.print_func = print_func
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else:
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self.print = print
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def print_without_file(self, message, **_kwargs):
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self.print_func(message)
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@contextlib.contextmanager
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def print_duration_of(self, what):
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start = time.time()
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try:
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yield
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finally:
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self.print('%s took %.1f minutes' % (what, (time.time() - start) / 60.0))
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@property
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def bootstrap_bucket(self):
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b = os.getenv('OVERRIDE_BOOTSTRAP_BUCKET')
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if b:
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return b
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u = urlparse.urlparse(self.url)
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if u.netloc == 'chromium.googlesource.com':
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return 'chromium-git-cache'
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# TODO(tandrii): delete once LUCI migration is completed.
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# Only public hosts will be supported going forward.
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elif u.netloc == 'chrome-internal.googlesource.com':
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return 'chrome-git-cache'
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# Not recognized.
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return None
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@property
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def _gs_path(self):
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return 'gs://%s/v2/%s' % (self.bootstrap_bucket, self.basedir)
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@classmethod
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def FromPath(cls, path):
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return cls(cls.CacheDirToUrl(path))
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@staticmethod
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def UrlToCacheDir(url):
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"""Convert a git url to a normalized form for the cache dir path."""
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parsed = urlparse.urlparse(url)
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norm_url = parsed.netloc + parsed.path
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if norm_url.endswith('.git'):
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norm_url = norm_url[:-len('.git')]
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# Use the same dir for authenticated URLs and unauthenticated URLs.
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norm_url = norm_url.replace('googlesource.com/a/', 'googlesource.com/')
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return norm_url.replace('-', '--').replace('/', '-').lower()
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@staticmethod
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def CacheDirToUrl(path):
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"""Convert a cache dir path to its corresponding url."""
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netpath = re.sub(r'\b-\b', '/', os.path.basename(path)).replace('--', '-')
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return 'https://%s' % netpath
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@classmethod
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def SetCachePath(cls, cachepath):
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with cls.cachepath_lock:
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setattr(cls, 'cachepath', cachepath)
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@classmethod
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def GetCachePath(cls):
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with cls.cachepath_lock:
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if not hasattr(cls, 'cachepath'):
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try:
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cachepath = subprocess.check_output(
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[cls.git_exe, 'config'] +
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cls._GIT_CONFIG_LOCATION +
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['cache.cachepath']).strip()
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except subprocess.CalledProcessError:
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cachepath = os.environ.get('GIT_CACHE_PATH', cls.UNSET_CACHEPATH)
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setattr(cls, 'cachepath', cachepath)
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ret = getattr(cls, 'cachepath')
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if ret is cls.UNSET_CACHEPATH:
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raise RuntimeError('No cache.cachepath git configuration or '
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'$GIT_CACHE_PATH is set.')
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return ret
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@staticmethod
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def _GetMostRecentCacheDirectory(ls_out_set):
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ready_file_pattern = re.compile(r'.*/(\d+).ready$')
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ready_dirs = []
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for name in ls_out_set:
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m = ready_file_pattern.match(name)
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# Given <path>/<number>.ready,
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# we are interested in <path>/<number> directory
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if m and (name[:-len('.ready')] + '/') in ls_out_set:
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ready_dirs.append((int(m.group(1)), name[:-len('.ready')]))
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if not ready_dirs:
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return None
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return max(ready_dirs)[1]
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def Rename(self, src, dst):
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# This is somehow racy on Windows.
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# Catching OSError because WindowsError isn't portable and
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# pylint complains.
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exponential_backoff_retry(
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lambda: os.rename(src, dst),
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excs=(OSError,),
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name='rename [%s] => [%s]' % (src, dst),
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printerr=self.print)
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def RunGit(self, cmd, **kwargs):
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"""Run git in a subprocess."""
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cwd = kwargs.setdefault('cwd', self.mirror_path)
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kwargs.setdefault('print_stdout', False)
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kwargs.setdefault('filter_fn', self.print)
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env = kwargs.get('env') or kwargs.setdefault('env', os.environ.copy())
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env.setdefault('GIT_ASKPASS', 'true')
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env.setdefault('SSH_ASKPASS', 'true')
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self.print('running "git %s" in "%s"' % (' '.join(cmd), cwd))
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gclient_utils.CheckCallAndFilter([self.git_exe] + cmd, **kwargs)
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def config(self, cwd=None, reset_fetch_config=False):
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if cwd is None:
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cwd = self.mirror_path
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if reset_fetch_config:
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try:
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self.RunGit(['config', '--unset-all', 'remote.origin.fetch'], cwd=cwd)
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except subprocess.CalledProcessError as e:
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# If exit code was 5, it means we attempted to unset a config that
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# didn't exist. Ignore it.
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if e.returncode != 5:
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raise
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# Don't run git-gc in a daemon. Bad things can happen if it gets killed.
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try:
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self.RunGit(['config', 'gc.autodetach', '0'], cwd=cwd)
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except subprocess.CalledProcessError:
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# Hard error, need to clobber.
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raise ClobberNeeded()
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# Don't combine pack files into one big pack file. It's really slow for
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# repositories, and there's no way to track progress and make sure it's
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# not stuck.
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if self.supported_project():
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self.RunGit(['config', 'gc.autopacklimit', '0'], cwd=cwd)
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# Allocate more RAM for cache-ing delta chains, for better performance
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# of "Resolving deltas".
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self.RunGit(['config', 'core.deltaBaseCacheLimit',
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gclient_utils.DefaultDeltaBaseCacheLimit()], cwd=cwd)
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self.RunGit(['config', 'remote.origin.url', self.url], cwd=cwd)
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self.RunGit(['config', '--replace-all', 'remote.origin.fetch',
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'+refs/heads/*:refs/heads/*', r'\+refs/heads/\*:.*'], cwd=cwd)
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for spec, value_regex in self.fetch_specs:
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self.RunGit(
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['config', '--replace-all', 'remote.origin.fetch', spec, value_regex],
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cwd=cwd)
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|
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def bootstrap_repo(self, directory):
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"""Bootstrap the repo from Google Storage if possible.
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More apt-ly named bootstrap_repo_from_cloud_if_possible_else_do_nothing().
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"""
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if not self.bootstrap_bucket:
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return False
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|
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gsutil = Gsutil(self.gsutil_exe, boto_path=None)
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|
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# Get the most recent version of the directory.
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# This is determined from the most recent version of a .ready file.
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# The .ready file is only uploaded when an entire directory has been
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# uploaded to GS.
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_, ls_out, ls_err = gsutil.check_call('ls', self._gs_path)
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ls_out_set = set(ls_out.strip().splitlines())
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latest_dir = self._GetMostRecentCacheDirectory(ls_out_set)
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|
|
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if not latest_dir:
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self.print('No bootstrap file for %s found in %s, stderr:\n %s' %
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(self.mirror_path, self.bootstrap_bucket,
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' '.join((ls_err or '').splitlines(True))))
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return False
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|
|
|
try:
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# create new temporary directory locally
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tempdir = tempfile.mkdtemp(prefix='_cache_tmp', dir=self.GetCachePath())
|
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self.RunGit(['init', '--bare'], cwd=tempdir)
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self.print('Downloading files in %s/* into %s.' %
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(latest_dir, tempdir))
|
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with self.print_duration_of('download'):
|
|
code = gsutil.call('-m', 'cp', '-r', latest_dir + "/*",
|
|
tempdir)
|
|
if code:
|
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return False
|
|
except Exception as e:
|
|
self.print('Encountered error: %s' % str(e), file=sys.stderr)
|
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gclient_utils.rmtree(tempdir)
|
|
return False
|
|
# delete the old directory
|
|
if os.path.exists(directory):
|
|
gclient_utils.rmtree(directory)
|
|
self.Rename(tempdir, directory)
|
|
return True
|
|
|
|
def contains_revision(self, revision):
|
|
if not self.exists():
|
|
return False
|
|
|
|
if sys.platform.startswith('win'):
|
|
# Windows .bat scripts use ^ as escape sequence, which means we have to
|
|
# escape it with itself for every .bat invocation.
|
|
needle = '%s^^^^{commit}' % revision
|
|
else:
|
|
needle = '%s^{commit}' % revision
|
|
try:
|
|
# cat-file exits with 0 on success, that is git object of given hash was
|
|
# found.
|
|
self.RunGit(['cat-file', '-e', needle])
|
|
return True
|
|
except subprocess.CalledProcessError:
|
|
return False
|
|
|
|
def exists(self):
|
|
return os.path.isfile(os.path.join(self.mirror_path, 'config'))
|
|
|
|
def supported_project(self):
|
|
"""Returns true if this repo is known to have a bootstrap zip file."""
|
|
u = urlparse.urlparse(self.url)
|
|
return u.netloc in [
|
|
'chromium.googlesource.com',
|
|
'chrome-internal.googlesource.com']
|
|
|
|
def _preserve_fetchspec(self):
|
|
"""Read and preserve remote.origin.fetch from an existing mirror.
|
|
|
|
This modifies self.fetch_specs.
|
|
"""
|
|
if not self.exists():
|
|
return
|
|
try:
|
|
config_fetchspecs = subprocess.check_output(
|
|
[self.git_exe, 'config', '--get-all', 'remote.origin.fetch'],
|
|
cwd=self.mirror_path)
|
|
for fetchspec in config_fetchspecs.splitlines():
|
|
self.fetch_specs.add(self.parse_fetch_spec(fetchspec))
|
|
except subprocess.CalledProcessError:
|
|
logging.warn('Tried and failed to preserve remote.origin.fetch from the '
|
|
'existing cache directory. You may need to manually edit '
|
|
'%s and "git cache fetch" again.'
|
|
% os.path.join(self.mirror_path, 'config'))
|
|
|
|
def _ensure_bootstrapped(self, depth, bootstrap, force=False):
|
|
pack_dir = os.path.join(self.mirror_path, 'objects', 'pack')
|
|
pack_files = []
|
|
if os.path.isdir(pack_dir):
|
|
pack_files = [f for f in os.listdir(pack_dir) if f.endswith('.pack')]
|
|
self.print('%s has %d .pack files, re-bootstrapping if >%d' %
|
|
(self.mirror_path, len(pack_files), GC_AUTOPACKLIMIT))
|
|
|
|
should_bootstrap = (force or
|
|
not self.exists() or
|
|
len(pack_files) > GC_AUTOPACKLIMIT)
|
|
|
|
if not should_bootstrap:
|
|
if depth and os.path.exists(os.path.join(self.mirror_path, 'shallow')):
|
|
logging.warn(
|
|
'Shallow fetch requested, but repo cache already exists.')
|
|
return
|
|
|
|
if self.exists():
|
|
# Re-bootstrapping an existing mirror; preserve existing fetch spec.
|
|
self._preserve_fetchspec()
|
|
else:
|
|
if os.path.exists(self.mirror_path):
|
|
# If the mirror path exists but self.exists() returns false, we're
|
|
# in an unexpected state. Nuke the previous mirror directory and
|
|
# start fresh.
|
|
gclient_utils.rmtree(self.mirror_path)
|
|
os.mkdir(self.mirror_path)
|
|
|
|
bootstrapped = (not depth and bootstrap and
|
|
self.bootstrap_repo(self.mirror_path))
|
|
|
|
if not bootstrapped:
|
|
if not self.exists() or not self.supported_project():
|
|
# Bootstrap failed due to:
|
|
# 1. No previous cache.
|
|
# 2. Project doesn't have a bootstrap folder.
|
|
# Start with a bare git dir.
|
|
self.RunGit(['init', '--bare'], cwd=self.mirror_path)
|
|
else:
|
|
# Bootstrap failed, previous cache exists; warn and continue.
|
|
logging.warn(
|
|
'Git cache has a lot of pack files (%d). Tried to re-bootstrap '
|
|
'but failed. Continuing with non-optimized repository.'
|
|
% len(pack_files))
|
|
|
|
def _fetch(self, rundir, verbose, depth, reset_fetch_config):
|
|
self.config(rundir, reset_fetch_config)
|
|
v = []
|
|
d = []
|
|
if verbose:
|
|
v = ['-v', '--progress']
|
|
if depth:
|
|
d = ['--depth', str(depth)]
|
|
fetch_cmd = ['fetch'] + v + d + ['origin']
|
|
fetch_specs = subprocess.check_output(
|
|
[self.git_exe, 'config', '--get-all', 'remote.origin.fetch'],
|
|
cwd=rundir).strip().splitlines()
|
|
for spec in fetch_specs:
|
|
spec = spec.decode()
|
|
try:
|
|
self.print('Fetching %s' % spec)
|
|
with self.print_duration_of('fetch %s' % spec):
|
|
self.RunGit(fetch_cmd + [spec], cwd=rundir, retry=True)
|
|
except subprocess.CalledProcessError:
|
|
if spec == '+refs/heads/*:refs/heads/*':
|
|
raise ClobberNeeded() # Corrupted cache.
|
|
logging.warn('Fetch of %s failed' % spec)
|
|
|
|
def populate(self, depth=None, shallow=False, bootstrap=False,
|
|
verbose=False, ignore_lock=False, lock_timeout=0,
|
|
reset_fetch_config=False):
|
|
assert self.GetCachePath()
|
|
if shallow and not depth:
|
|
depth = 10000
|
|
gclient_utils.safe_makedirs(self.GetCachePath())
|
|
|
|
lockfile = Lockfile(self.mirror_path, lock_timeout)
|
|
if not ignore_lock:
|
|
lockfile.lock()
|
|
|
|
try:
|
|
self._ensure_bootstrapped(depth, bootstrap)
|
|
self._fetch(self.mirror_path, verbose, depth, reset_fetch_config)
|
|
except ClobberNeeded:
|
|
# This is a major failure, we need to clean and force a bootstrap.
|
|
gclient_utils.rmtree(self.mirror_path)
|
|
self.print(GIT_CACHE_CORRUPT_MESSAGE)
|
|
self._ensure_bootstrapped(depth, bootstrap, force=True)
|
|
self._fetch(self.mirror_path, verbose, depth, reset_fetch_config)
|
|
finally:
|
|
if not ignore_lock:
|
|
lockfile.unlock()
|
|
|
|
def update_bootstrap(self, prune=False):
|
|
# The folder is <git number>
|
|
gen_number = subprocess.check_output(
|
|
[self.git_exe, 'number', 'master'], cwd=self.mirror_path).strip()
|
|
gsutil = Gsutil(path=self.gsutil_exe, boto_path=None)
|
|
|
|
src_name = self.mirror_path
|
|
dest_prefix = '%s/%s' % (self._gs_path, gen_number)
|
|
|
|
# ls_out lists contents in the format: gs://blah/blah/123...
|
|
_, ls_out, _ = gsutil.check_call('ls', self._gs_path)
|
|
|
|
# Check to see if folder already exists in gs
|
|
ls_out_set = set(ls_out.strip().splitlines())
|
|
if (dest_prefix + '/' in ls_out_set and
|
|
dest_prefix + '.ready' in ls_out_set):
|
|
print('Cache %s already exists.' % dest_prefix)
|
|
return
|
|
|
|
# Run Garbage Collect to compress packfile.
|
|
self.RunGit(['gc', '--prune=all'])
|
|
|
|
gsutil.call('-m', 'cp', '-r', src_name, dest_prefix)
|
|
|
|
# Create .ready file and upload
|
|
_, ready_file_name = tempfile.mkstemp(suffix='.ready')
|
|
try:
|
|
gsutil.call('cp', ready_file_name, '%s.ready' % (dest_prefix))
|
|
finally:
|
|
os.remove(ready_file_name)
|
|
|
|
# remove all other directory/.ready files in the same gs_path
|
|
# except for the directory/.ready file previously created
|
|
# which can be used for bootstrapping while the current one is
|
|
# being uploaded
|
|
if not prune:
|
|
return
|
|
prev_dest_prefix = self._GetMostRecentCacheDirectory(ls_out_set)
|
|
if not prev_dest_prefix:
|
|
return
|
|
for path in ls_out_set:
|
|
if (path == prev_dest_prefix + '/' or
|
|
path == prev_dest_prefix + '.ready'):
|
|
continue
|
|
if path.endswith('.ready'):
|
|
gsutil.call('rm', path)
|
|
continue
|
|
gsutil.call('-m', 'rm', '-r', path)
|
|
|
|
|
|
@staticmethod
|
|
def DeleteTmpPackFiles(path):
|
|
pack_dir = os.path.join(path, 'objects', 'pack')
|
|
if not os.path.isdir(pack_dir):
|
|
return
|
|
pack_files = [f for f in os.listdir(pack_dir) if
|
|
f.startswith('.tmp-') or f.startswith('tmp_pack_')]
|
|
for f in pack_files:
|
|
f = os.path.join(pack_dir, f)
|
|
try:
|
|
os.remove(f)
|
|
logging.warn('Deleted stale temporary pack file %s' % f)
|
|
except OSError:
|
|
logging.warn('Unable to delete temporary pack file %s' % f)
|
|
|
|
@classmethod
|
|
def BreakLocks(cls, path):
|
|
did_unlock = False
|
|
lf = Lockfile(path)
|
|
if lf.break_lock():
|
|
did_unlock = True
|
|
# Look for lock files that might have been left behind by an interrupted
|
|
# git process.
|
|
lf = os.path.join(path, 'config.lock')
|
|
if os.path.exists(lf):
|
|
os.remove(lf)
|
|
did_unlock = True
|
|
cls.DeleteTmpPackFiles(path)
|
|
return did_unlock
|
|
|
|
def unlock(self):
|
|
return self.BreakLocks(self.mirror_path)
|
|
|
|
@classmethod
|
|
def UnlockAll(cls):
|
|
cachepath = cls.GetCachePath()
|
|
if not cachepath:
|
|
return
|
|
dirlist = os.listdir(cachepath)
|
|
repo_dirs = set([os.path.join(cachepath, path) for path in dirlist
|
|
if os.path.isdir(os.path.join(cachepath, path))])
|
|
for dirent in dirlist:
|
|
if dirent.startswith('_cache_tmp') or dirent.startswith('tmp'):
|
|
gclient_utils.rm_file_or_tree(os.path.join(cachepath, dirent))
|
|
elif (dirent.endswith('.lock') and
|
|
os.path.isfile(os.path.join(cachepath, dirent))):
|
|
repo_dirs.add(os.path.join(cachepath, dirent[:-5]))
|
|
|
|
unlocked_repos = []
|
|
for repo_dir in repo_dirs:
|
|
if cls.BreakLocks(repo_dir):
|
|
unlocked_repos.append(repo_dir)
|
|
|
|
return unlocked_repos
|
|
|
|
@subcommand.usage('[url of repo to check for caching]')
|
|
def CMDexists(parser, args):
|
|
"""Check to see if there already is a cache of the given repo."""
|
|
_, args = parser.parse_args(args)
|
|
if not len(args) == 1:
|
|
parser.error('git cache exists only takes exactly one repo url.')
|
|
url = args[0]
|
|
mirror = Mirror(url)
|
|
if mirror.exists():
|
|
print(mirror.mirror_path)
|
|
return 0
|
|
return 1
|
|
|
|
|
|
@subcommand.usage('[url of repo to create a bootstrap zip file]')
|
|
def CMDupdate_bootstrap(parser, args):
|
|
"""Create and uploads a bootstrap tarball."""
|
|
# Lets just assert we can't do this on Windows.
|
|
if sys.platform.startswith('win'):
|
|
print('Sorry, update bootstrap will not work on Windows.', file=sys.stderr)
|
|
return 1
|
|
|
|
parser.add_option('--prune', action='store_true',
|
|
help='Prune all other cached bundles of the same repo.')
|
|
|
|
# First, we need to ensure the cache is populated.
|
|
populate_args = args[:]
|
|
CMDpopulate(parser, populate_args)
|
|
|
|
# Get the repo directory.
|
|
options, args = parser.parse_args(args)
|
|
url = args[0]
|
|
mirror = Mirror(url)
|
|
mirror.update_bootstrap(options.prune)
|
|
return 0
|
|
|
|
|
|
@subcommand.usage('[url of repo to add to or update in cache]')
|
|
def CMDpopulate(parser, args):
|
|
"""Ensure that the cache has all up-to-date objects for the given repo."""
|
|
parser.add_option('--depth', type='int',
|
|
help='Only cache DEPTH commits of history')
|
|
parser.add_option('--shallow', '-s', action='store_true',
|
|
help='Only cache 10000 commits of history')
|
|
parser.add_option('--ref', action='append',
|
|
help='Specify additional refs to be fetched')
|
|
parser.add_option('--no_bootstrap', '--no-bootstrap',
|
|
action='store_true',
|
|
help='Don\'t bootstrap from Google Storage')
|
|
parser.add_option('--ignore_locks', '--ignore-locks',
|
|
action='store_true',
|
|
help='Don\'t try to lock repository')
|
|
parser.add_option('--reset-fetch-config', action='store_true', default=False,
|
|
help='Reset the fetch config before populating the cache.')
|
|
|
|
options, args = parser.parse_args(args)
|
|
if not len(args) == 1:
|
|
parser.error('git cache populate only takes exactly one repo url.')
|
|
url = args[0]
|
|
|
|
mirror = Mirror(url, refs=options.ref)
|
|
kwargs = {
|
|
'verbose': options.verbose,
|
|
'shallow': options.shallow,
|
|
'bootstrap': not options.no_bootstrap,
|
|
'ignore_lock': options.ignore_locks,
|
|
'lock_timeout': options.timeout,
|
|
'reset_fetch_config': options.reset_fetch_config,
|
|
}
|
|
if options.depth:
|
|
kwargs['depth'] = options.depth
|
|
mirror.populate(**kwargs)
|
|
|
|
|
|
@subcommand.usage('Fetch new commits into cache and current checkout')
|
|
def CMDfetch(parser, args):
|
|
"""Update mirror, and fetch in cwd."""
|
|
parser.add_option('--all', action='store_true', help='Fetch all remotes')
|
|
parser.add_option('--no_bootstrap', '--no-bootstrap',
|
|
action='store_true',
|
|
help='Don\'t (re)bootstrap from Google Storage')
|
|
options, args = parser.parse_args(args)
|
|
|
|
# Figure out which remotes to fetch. This mimics the behavior of regular
|
|
# 'git fetch'. Note that in the case of "stacked" or "pipelined" branches,
|
|
# this will NOT try to traverse up the branching structure to find the
|
|
# ultimate remote to update.
|
|
remotes = []
|
|
if options.all:
|
|
assert not args, 'fatal: fetch --all does not take a repository argument'
|
|
remotes = subprocess.check_output([Mirror.git_exe, 'remote']).splitlines()
|
|
elif args:
|
|
remotes = args
|
|
else:
|
|
current_branch = subprocess.check_output(
|
|
[Mirror.git_exe, 'rev-parse', '--abbrev-ref', 'HEAD']).strip()
|
|
if current_branch != 'HEAD':
|
|
upstream = subprocess.check_output(
|
|
[Mirror.git_exe, 'config', 'branch.%s.remote' % current_branch]
|
|
).strip()
|
|
if upstream and upstream != '.':
|
|
remotes = [upstream]
|
|
if not remotes:
|
|
remotes = ['origin']
|
|
|
|
cachepath = Mirror.GetCachePath()
|
|
git_dir = os.path.abspath(subprocess.check_output(
|
|
[Mirror.git_exe, 'rev-parse', '--git-dir']))
|
|
git_dir = os.path.abspath(git_dir)
|
|
if git_dir.startswith(cachepath):
|
|
mirror = Mirror.FromPath(git_dir)
|
|
mirror.populate(
|
|
bootstrap=not options.no_bootstrap, lock_timeout=options.timeout)
|
|
return 0
|
|
for remote in remotes:
|
|
remote_url = subprocess.check_output(
|
|
[Mirror.git_exe, 'config', 'remote.%s.url' % remote]).strip()
|
|
if remote_url.startswith(cachepath):
|
|
mirror = Mirror.FromPath(remote_url)
|
|
mirror.print = lambda *args: None
|
|
print('Updating git cache...')
|
|
mirror.populate(
|
|
bootstrap=not options.no_bootstrap, lock_timeout=options.timeout)
|
|
subprocess.check_call([Mirror.git_exe, 'fetch', remote])
|
|
return 0
|
|
|
|
|
|
@subcommand.usage('[url of repo to unlock, or -a|--all]')
|
|
def CMDunlock(parser, args):
|
|
"""Unlock one or all repos if their lock files are still around."""
|
|
parser.add_option('--force', '-f', action='store_true',
|
|
help='Actually perform the action')
|
|
parser.add_option('--all', '-a', action='store_true',
|
|
help='Unlock all repository caches')
|
|
options, args = parser.parse_args(args)
|
|
if len(args) > 1 or (len(args) == 0 and not options.all):
|
|
parser.error('git cache unlock takes exactly one repo url, or --all')
|
|
|
|
if not options.force:
|
|
cachepath = Mirror.GetCachePath()
|
|
lockfiles = [os.path.join(cachepath, path)
|
|
for path in os.listdir(cachepath)
|
|
if path.endswith('.lock') and os.path.isfile(path)]
|
|
parser.error('git cache unlock requires -f|--force to do anything. '
|
|
'Refusing to unlock the following repo caches: '
|
|
', '.join(lockfiles))
|
|
|
|
unlocked_repos = []
|
|
if options.all:
|
|
unlocked_repos.extend(Mirror.UnlockAll())
|
|
else:
|
|
m = Mirror(args[0])
|
|
if m.unlock():
|
|
unlocked_repos.append(m.mirror_path)
|
|
|
|
if unlocked_repos:
|
|
logging.info('Broke locks on these caches:\n %s' % '\n '.join(
|
|
unlocked_repos))
|
|
|
|
|
|
class OptionParser(optparse.OptionParser):
|
|
"""Wrapper class for OptionParser to handle global options."""
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
optparse.OptionParser.__init__(self, *args, prog='git cache', **kwargs)
|
|
self.add_option('-c', '--cache-dir',
|
|
help=(
|
|
'Path to the directory containing the caches. Normally '
|
|
'deduced from git config cache.cachepath or '
|
|
'$GIT_CACHE_PATH.'))
|
|
self.add_option('-v', '--verbose', action='count', default=1,
|
|
help='Increase verbosity (can be passed multiple times)')
|
|
self.add_option('-q', '--quiet', action='store_true',
|
|
help='Suppress all extraneous output')
|
|
self.add_option('--timeout', type='int', default=0,
|
|
help='Timeout for acquiring cache lock, in seconds')
|
|
|
|
def parse_args(self, args=None, values=None):
|
|
options, args = optparse.OptionParser.parse_args(self, args, values)
|
|
if options.quiet:
|
|
options.verbose = 0
|
|
|
|
levels = [logging.ERROR, logging.WARNING, logging.INFO, logging.DEBUG]
|
|
logging.basicConfig(level=levels[min(options.verbose, len(levels) - 1)])
|
|
|
|
try:
|
|
global_cache_dir = Mirror.GetCachePath()
|
|
except RuntimeError:
|
|
global_cache_dir = None
|
|
if options.cache_dir:
|
|
if global_cache_dir and (
|
|
os.path.abspath(options.cache_dir) !=
|
|
os.path.abspath(global_cache_dir)):
|
|
logging.warn('Overriding globally-configured cache directory.')
|
|
Mirror.SetCachePath(options.cache_dir)
|
|
|
|
return options, args
|
|
|
|
|
|
def main(argv):
|
|
dispatcher = subcommand.CommandDispatcher(__name__)
|
|
return dispatcher.execute(OptionParser(), argv)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
sys.exit(main(sys.argv[1:]))
|
|
except KeyboardInterrupt:
|
|
sys.stderr.write('interrupted\n')
|
|
sys.exit(1)
|