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