# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake Smart Dictionary Implementation
Functions for interacting with the data structure used by the
BitBake build tools.
Copyright (C) 2003, 2004 Chris Larson
Copyright (C) 2004, 2005 Seb Frankengul
Copyright (C) 2005 Holger Hans Peter Freyther
Copyright (C) 2005 Uli Luckas
Copyright (C) 2005 ROAD GmbH
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
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., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA.
Based on functions from the base bb module, Copyright 2003 Holger Schurig
"""
import copy, os, re, sys, time, types
from bb import note, debug, fatal
try:
import cPickle as pickle
except ImportError:
import pickle
print "NOTE: Importing cPickle failed. Falling back to a very slow implementation."
__setvar_keyword__ = ["_append","_prepend","_delete"]
__setvar_regexp__ = re.compile('(?P.*?)(?P_append|_prepend|_delete)(_(?P.*))?')
__expand_var_regexp__ = re.compile(r"\${[^{}]+}")
__expand_python_regexp__ = re.compile(r"\${@.+?}")
class DataSmart:
def __init__(self):
self.dict = {}
def expand(self,s, varname):
def var_sub(match):
key = match.group()[2:-1]
if varname and key:
if varname == key:
raise Exception("variable %s references itself!" % varname)
var = self.getVar(key, 1)
if var is not None:
return var
else:
return match.group()
def python_sub(match):
import bb
code = match.group()[3:-1]
locals()['d'] = self
s = eval(code)
if type(s) == types.IntType: s = str(s)
return s
if type(s) is not types.StringType: # sanity check
return s
while s.find('$') != -1:
olds = s
try:
s = __expand_var_regexp__.sub(var_sub, s)
s = __expand_python_regexp__.sub(python_sub, s)
if s == olds: break
if type(s) is not types.StringType: # sanity check
import bb
bb.error('expansion of %s returned non-string %s' % (olds, s))
except KeyboardInterrupt:
raise
except:
note("%s:%s while evaluating:\n%s" % (sys.exc_info()[0], sys.exc_info()[1], s))
raise
return s
def initVar(self, var):
if not var in self.dict:
self.dict[var] = {}
def pickle_prep(self, cfg):
if "_data" in self.dict:
if self.dict["_data"] == cfg:
self.dict["_data"] = "cfg";
else: # this is an unknown array for the moment
pass
def unpickle_prep(self, cfg):
if "_data" in self.dict:
if self.dict["_data"] == "cfg":
self.dict["_data"] = cfg;
def _findVar(self,var):
_dest = self.dict
while (_dest and var not in _dest):
if not "_data" in _dest:
_dest = None
break
_dest = _dest["_data"]
if _dest and var in _dest:
return _dest[var]
return None
def _copyVar(self,var,name):
local_var = self._findVar(var)
if local_var:
self.dict[name] = copy.copy(local_var)
else:
debug(1,"Warning, _copyVar %s to %s, %s does not exists" % (var,name,var))
def _makeShadowCopy(self, var):
if var in self.dict:
return
local_var = self._findVar(var)
if local_var:
self.dict[var] = copy.copy(local_var)
else:
self.initVar(var)
def setVar(self,var,value):
match = __setvar_regexp__.match(var)
if match and match.group("keyword") in __setvar_keyword__:
base = match.group('base')
keyword = match.group("keyword")
override = match.group('add')
l = self.getVarFlag(base, keyword) or []
if override == 'delete':
if l.count([value, None]):
del l[l.index([value, None])]
l.append([value, override])
self.setVarFlag(base, match.group("keyword"), l)
return
if not var in self.dict:
self._makeShadowCopy(var)
if self.getVarFlag(var, 'matchesenv'):
self.delVarFlag(var, 'matchesenv')
self.setVarFlag(var, 'export', 1)
# setting var
self.dict[var]["content"] = value
def getVar(self,var,exp):
value = self.getVarFlag(var,"content")
if exp and value:
return self.expand(value,var)
return value
def delVar(self,var):
self.dict[var] = {}
def setVarFlag(self,var,flag,flagvalue):
if not var in self.dict:
self._makeShadowCopy(var)
self.dict[var][flag] = flagvalue
def getVarFlag(self,var,flag):
local_var = self._findVar(var)
if local_var:
if flag in local_var:
return copy.copy(local_var[flag])
return None
def delVarFlag(self,var,flag):
local_var = self._findVar(var)
if not local_var:
return
if not var in self.dict:
self._makeShadowCopy(var)
if var in self.dict and flag in self.dict[var]:
del self.dict[var][flag]
def setVarFlags(self,var,flags):
if not var in self.dict:
self._makeShadowCopy(var)
for i in flags.keys():
if i == "content":
continue
self.dict[var][i] = flags[i]
def getVarFlags(self,var):
local_var = self._findVar(var)
flags = {}
if local_var:
for i in self.dict[var].keys():
if i == "content":
continue
flags[i] = self.dict[var][i]
if len(flags) == 0:
return None
return flags
def delVarFlags(self,var):
if not var in self.dict:
self._makeShadowCopy(var)
if var in self.dict:
content = None
# try to save the content
if "content" in self.dict[var]:
content = self.dict[var]["content"]
self.dict[var] = {}
self.dict[var]["content"] = content
else:
del self.dict[var]
def createCopy(self):
"""
Create a copy of self by setting _data to self
"""
# we really want this to be a DataSmart...
data = DataSmart()
data.dict["_data"] = self.dict
return data
# Dictionary Methods
def keys(self):
def _keys(d, mykey):
if "_data" in d:
_keys(d["_data"],mykey)
for key in d.keys():
if key != "_data":
mykey[key] = None
keytab = {}
_keys(self.dict,keytab)
return keytab.keys()
def __getitem__(self,item):
start = self.dict
while start:
if item in start:
return start[item]
elif "_data" in start:
start = start["_data"]
else:
start = None
return None
def __setitem__(self,var,data):
self._makeShadowCopy(var)
self.dict[var] = data
class DataSmartPackage(DataSmart):
"""
Persistent Data Storage
"""
def sanitize_filename(bbfile):
return bbfile.replace( '/', '_' )
sanitize_filename = staticmethod(sanitize_filename)
def unpickle(self):
"""
Restore the dict from memory
"""
cache_bbfile = self.sanitize_filename(self.bbfile)
p = pickle.Unpickler( file("%s/%s"%(self.cache,cache_bbfile),"rb"))
self.dict = p.load()
self.unpickle_prep()
funcstr = self.getVar('__functions__', 0)
if funcstr:
comp = compile(funcstr, "", "exec")
exec comp in __builtins__
def linkDataSet(self):
if not self.parent == None:
# assume parent is a DataSmartInstance
self.dict["_data"] = self.parent.dict
def __init__(self,cache,name,clean,parent):
"""
Construct a persistent data instance
"""
#Initialize the dictionary
DataSmart.__init__(self)
self.cache = cache
self.bbfile = os.path.abspath( name )
self.parent = parent
# Either unpickle the data or do copy on write
if clean:
self.linkDataSet()
else:
self.unpickle()
def commit(self, mtime):
"""
Save the package to a permanent storage
"""
self.pickle_prep()
cache_bbfile = self.sanitize_filename(self.bbfile)
p = pickle.Pickler(file("%s/%s" %(self.cache,cache_bbfile), "wb" ), -1 )
p.dump( self.dict )
self.unpickle_prep()
def mtime(cache,bbfile):
cache_bbfile = DataSmartPackage.sanitize_filename(bbfile)
try:
return os.stat( "%s/%s" % (cache,cache_bbfile) )[8]
except OSError:
return 0
mtime = staticmethod(mtime)
def pickle_prep(self):
"""
If self.dict contains a _data key and it is a configuration
we will remember we had a configuration instance attached
"""
if "_data" in self.dict:
if self.dict["_data"] == self.parent:
dest["_data"] = "cfg"
def unpickle_prep(self):
"""
If we had a configuration instance attached, we will reattach it
"""
if "_data" in self.dict:
if self.dict["_data"] == "cfg":
self.dict["_data"] = self.parent