135 lines
4.3 KiB
Python
135 lines
4.3 KiB
Python
# Local file checksum cache implementation
|
|
#
|
|
# Copyright (C) 2012 Intel Corporation
|
|
#
|
|
# 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
|
|
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
|