123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138 |
- # Local file checksum cache implementation
- #
- # Copyright (C) 2012 Intel Corporation
- #
- # SPDX-License-Identifier: GPL-2.0-only
- #
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License version 2 as
- # published by the Free Software Foundation.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License along
- # with this program; if not, write to the Free Software Foundation, Inc.,
- # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- import glob
- import operator
- import os
- import stat
- import pickle
- import bb.utils
- import logging
- from bb.cache import MultiProcessCache
- logger = logging.getLogger("BitBake.Cache")
- # mtime cache (non-persistent)
- # based upon the assumption that files do not change during bitbake run
- class FileMtimeCache(object):
- cache = {}
- def cached_mtime(self, f):
- if f not in self.cache:
- self.cache[f] = os.stat(f)[stat.ST_MTIME]
- return self.cache[f]
- def cached_mtime_noerror(self, f):
- if f not in self.cache:
- try:
- self.cache[f] = os.stat(f)[stat.ST_MTIME]
- except OSError:
- return 0
- return self.cache[f]
- def update_mtime(self, f):
- self.cache[f] = os.stat(f)[stat.ST_MTIME]
- return self.cache[f]
- def clear(self):
- self.cache.clear()
- # Checksum + mtime cache (persistent)
- class FileChecksumCache(MultiProcessCache):
- cache_file_name = "local_file_checksum_cache.dat"
- CACHE_VERSION = 1
- def __init__(self):
- self.mtime_cache = FileMtimeCache()
- MultiProcessCache.__init__(self)
- def get_checksum(self, f):
- entry = self.cachedata[0].get(f)
- cmtime = self.mtime_cache.cached_mtime(f)
- if entry:
- (mtime, hashval) = entry
- if cmtime == mtime:
- return hashval
- else:
- bb.debug(2, "file %s changed mtime, recompute checksum" % f)
- hashval = bb.utils.md5_file(f)
- self.cachedata_extras[0][f] = (cmtime, hashval)
- return hashval
- def merge_data(self, source, dest):
- for h in source[0]:
- if h in dest:
- (smtime, _) = source[0][h]
- (dmtime, _) = dest[0][h]
- if smtime > dmtime:
- dest[0][h] = source[0][h]
- else:
- dest[0][h] = source[0][h]
- def get_checksums(self, filelist, pn):
- """Get checksums for a list of files"""
- def checksum_file(f):
- try:
- checksum = self.get_checksum(f)
- except OSError as e:
- bb.warn("Unable to get checksum for %s SRC_URI entry %s: %s" % (pn, os.path.basename(f), e))
- return None
- return checksum
- def checksum_dir(pth):
- # Handle directories recursively
- if pth == "/":
- bb.fatal("Refusing to checksum /")
- dirchecksums = []
- for root, dirs, files in os.walk(pth):
- for name in files:
- fullpth = os.path.join(root, name)
- checksum = checksum_file(fullpth)
- if checksum:
- dirchecksums.append((fullpth, checksum))
- return dirchecksums
- checksums = []
- for pth in filelist.split():
- exist = pth.split(":")[1]
- if exist == "False":
- continue
- pth = pth.split(":")[0]
- if '*' in pth:
- # Handle globs
- for f in glob.glob(pth):
- if os.path.isdir(f):
- if not os.path.islink(f):
- checksums.extend(checksum_dir(f))
- else:
- checksum = checksum_file(f)
- if checksum:
- checksums.append((f, checksum))
- elif os.path.isdir(pth):
- if not os.path.islink(pth):
- checksums.extend(checksum_dir(pth))
- else:
- checksum = checksum_file(pth)
- if checksum:
- checksums.append((pth, checksum))
- checksums.sort(key=operator.itemgetter(1))
- return checksums
|