581 lines
16 KiB
Python
581 lines
16 KiB
Python
#!/usr/bin/env python
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# ex:ts=4:sw=4:sts=4:et
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# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
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"""
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BitBake 'Data' implementations
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Functions for interacting with the data structure used by the
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BitBake build tools.
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Copyright (C) 2003, 2004 Chris Larson
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Copyright (C) 2005 Holger Hans Peter Freyther
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA.
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Based on functions from the base bb module, Copyright 2003 Holger Schurig
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"""
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import sys, os, re, time, types
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if sys.argv[0][-5:] == "pydoc":
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path = os.path.dirname(os.path.dirname(sys.argv[1]))
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else:
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path = os.path.dirname(os.path.dirname(sys.argv[0]))
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sys.path.append(path)
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from bb import note, debug, data_smart
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_dict_type = data_smart.DataSmart
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_dict_p_type = data_smart.DataSmartPackage
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class DataDictFull(dict):
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"""
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This implements our Package Data Storage Interface.
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setDirty is a no op as all items are held in memory
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"""
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def setDirty(self, bbfile, data):
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"""
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No-Op we assume data was manipulated as some sort of
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reference
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"""
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if not bbfile in self:
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raise Exception("File %s was not in dictionary before" % bbfile)
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self[bbfile] = data
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class DataDictCache:
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"""
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Databacked Dictionary implementation
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"""
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def __init__(self, cache_dir, config):
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self.cache_dir = cache_dir
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self.files = []
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self.dirty = {}
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self.config = config
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def has_key(self,key):
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return key in self.files
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def keys(self):
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return self.files
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def __setitem__(self, key, data):
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"""
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Add the key to the list of known files and
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place the data in the cache?
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"""
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if key in self.files:
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return
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self.files.append(key)
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def __getitem__(self, key):
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if not key in self.files:
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return None
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# if it was dirty we will
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if key in self.dirty:
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return self.dirty[key]
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# not cached yet
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return _dict_p_type(self.cache_dir, key,False,self.config)
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def setDirty(self, bbfile, data):
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"""
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Only already added items can be declared dirty!!!
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"""
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if not bbfile in self.files:
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raise Exception("File %s was not in dictionary before" % bbfile)
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self.dirty[bbfile] = data
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def init():
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return _dict_type()
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def init_db(cache,name,clean,parent = None):
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return _dict_p_type(cache,name,clean,parent)
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def init_db_mtime(cache,cache_bbfile):
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return _dict_p_type.mtime(cache,cache_bbfile)
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def pkgdata(use_cache, cache, config = None):
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"""
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Return some sort of dictionary to lookup parsed dictionaires
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"""
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if use_cache:
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return DataDictCache(cache, config)
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return DataDictFull()
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def createCopy(source):
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"""Link the source set to the destination
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If one does not find the value in the destination set,
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search will go on to the source set to get the value.
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Value from source are copy-on-write. i.e. any try to
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modify one of them will end up putting the modified value
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in the destination set.
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"""
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return source.createCopy()
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def initVar(var, d):
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"""Non-destructive var init for data structure"""
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d.initVar(var)
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def setVar(var, value, d):
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"""Set a variable to a given value
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Example:
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>>> d = init()
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>>> setVar('TEST', 'testcontents', d)
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>>> print getVar('TEST', d)
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testcontents
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"""
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d.setVar(var,value)
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def getVar(var, d, exp = 0):
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"""Gets the value of a variable
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Example:
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>>> d = init()
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>>> setVar('TEST', 'testcontents', d)
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>>> print getVar('TEST', d)
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testcontents
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"""
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return d.getVar(var,exp)
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def delVar(var, d):
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"""Removes a variable from the data set
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Example:
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>>> d = init()
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>>> setVar('TEST', 'testcontents', d)
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>>> print getVar('TEST', d)
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testcontents
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>>> delVar('TEST', d)
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>>> print getVar('TEST', d)
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None
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"""
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d.delVar(var)
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def setVarFlag(var, flag, flagvalue, d):
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"""Set a flag for a given variable to a given value
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Example:
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>>> d = init()
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>>> setVarFlag('TEST', 'python', 1, d)
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>>> print getVarFlag('TEST', 'python', d)
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1
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"""
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d.setVarFlag(var,flag,flagvalue)
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def getVarFlag(var, flag, d):
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"""Gets given flag from given var
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Example:
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>>> d = init()
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>>> setVarFlag('TEST', 'python', 1, d)
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>>> print getVarFlag('TEST', 'python', d)
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1
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"""
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return d.getVarFlag(var,flag)
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def delVarFlag(var, flag, d):
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"""Removes a given flag from the variable's flags
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Example:
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>>> d = init()
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>>> setVarFlag('TEST', 'testflag', 1, d)
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>>> print getVarFlag('TEST', 'testflag', d)
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1
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>>> delVarFlag('TEST', 'testflag', d)
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>>> print getVarFlag('TEST', 'testflag', d)
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None
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"""
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d.delVarFlag(var,flag)
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def setVarFlags(var, flags, d):
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"""Set the flags for a given variable
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Example:
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>>> d = init()
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>>> myflags = {}
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>>> myflags['test'] = 'blah'
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>>> setVarFlags('TEST', myflags, d)
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>>> print getVarFlag('TEST', 'test', d)
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blah
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"""
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d.setVarFlags(var,flags)
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def getVarFlags(var, d):
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"""Gets a variable's flags
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Example:
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>>> d = init()
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>>> setVarFlag('TEST', 'test', 'blah', d)
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>>> print getVarFlags('TEST', d)['test']
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blah
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"""
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return d.getVarFlags(var)
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def delVarFlags(var, d):
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"""Removes a variable's flags
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Example:
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>>> data = init()
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>>> setVarFlag('TEST', 'testflag', 1, data)
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>>> print getVarFlag('TEST', 'testflag', data)
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1
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>>> delVarFlags('TEST', data)
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>>> print getVarFlags('TEST', data)
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None
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"""
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d.delVarFlags(var)
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def keys(d):
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"""Return a list of keys in d
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Example:
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>>> d = init()
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>>> setVar('TEST', 1, d)
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>>> setVar('MOO' , 2, d)
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>>> setVarFlag('TEST', 'test', 1, d)
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>>> keys(d)
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['TEST', 'MOO']
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"""
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return d.keys()
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def getData(d):
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"""Returns the data object used"""
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return d
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def setData(newData, d):
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"""Sets the data object to the supplied value"""
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d = newData
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__expand_var_regexp__ = re.compile(r"\${[^{}]+}")
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__expand_python_regexp__ = re.compile(r"\${@.+?}")
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def expand(s, d, varname = None):
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"""Variable expansion using the data store.
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Example:
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Standard expansion:
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>>> d = init()
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>>> setVar('A', 'sshd', d)
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>>> print expand('/usr/bin/${A}', d)
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/usr/bin/sshd
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Python expansion:
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>>> d = init()
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>>> print expand('result: ${@37 * 72}', d)
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result: 2664
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Shell expansion:
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>>> d = init()
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>>> print expand('${TARGET_MOO}', d)
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${TARGET_MOO}
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>>> setVar('TARGET_MOO', 'yupp', d)
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>>> print expand('${TARGET_MOO}',d)
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yupp
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>>> setVar('SRC_URI', 'http://somebug.${TARGET_MOO}', d)
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>>> delVar('TARGET_MOO', d)
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>>> print expand('${SRC_URI}', d)
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http://somebug.${TARGET_MOO}
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"""
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def var_sub(match):
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key = match.group()[2:-1]
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if varname and key:
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if varname == key:
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raise Exception("variable %s references itself!" % varname)
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var = getVar(key, d, 1)
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if var is not None:
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return var
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else:
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return match.group()
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def python_sub(match):
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import bb
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code = match.group()[3:-1]
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locals()['d'] = d
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s = eval(code)
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if type(s) == types.IntType: s = str(s)
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return s
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if type(s) is not types.StringType: # sanity check
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return s
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while s.find('$') != -1:
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olds = s
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try:
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s = __expand_var_regexp__.sub(var_sub, s)
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s = __expand_python_regexp__.sub(python_sub, s)
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if s == olds: break
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if type(s) is not types.StringType: # sanity check
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import bb
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bb.error('expansion of %s returned non-string %s' % (olds, s))
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except KeyboardInterrupt:
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raise
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except:
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note("%s:%s while evaluating:\n%s" % (sys.exc_info()[0], sys.exc_info()[1], s))
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raise
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return s
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def expandKeys(alterdata, readdata = None):
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if readdata == None:
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readdata = alterdata
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for key in keys(alterdata):
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ekey = expand(key, readdata)
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if key == ekey:
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continue
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val = getVar(key, alterdata)
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if val is None:
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continue
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# import copy
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# setVarFlags(ekey, copy.copy(getVarFlags(key, readdata)), alterdata)
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setVar(ekey, val, alterdata)
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for i in ('_append', '_prepend', '_delete'):
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dest = getVarFlag(ekey, i, alterdata) or []
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src = getVarFlag(key, i, readdata) or []
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dest.extend(src)
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setVarFlag(ekey, i, dest, alterdata)
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delVar(key, alterdata)
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def expandData(alterdata, readdata = None):
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"""For each variable in alterdata, expand it, and update the var contents.
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Replacements use data from readdata.
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Example:
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>>> a=init()
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>>> b=init()
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>>> setVar("dlmsg", "dl_dir is ${DL_DIR}", a)
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>>> setVar("DL_DIR", "/path/to/whatever", b)
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>>> expandData(a, b)
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>>> print getVar("dlmsg", a)
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dl_dir is /path/to/whatever
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"""
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if readdata == None:
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readdata = alterdata
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for key in keys(alterdata):
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val = getVar(key, alterdata)
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if type(val) is not types.StringType:
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continue
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expanded = expand(val, readdata)
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# print "key is %s, val is %s, expanded is %s" % (key, val, expanded)
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if val != expanded:
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setVar(key, expanded, alterdata)
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import os
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def inheritFromOS(d):
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"""Inherit variables from the environment."""
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# fakeroot needs to be able to set these
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non_inherit_vars = [ "LD_LIBRARY_PATH", "LD_PRELOAD" ]
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for s in os.environ.keys():
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if not s in non_inherit_vars:
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try:
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setVar(s, os.environ[s], d)
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setVarFlag(s, 'matchesenv', '1', d)
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except TypeError:
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pass
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import sys
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def emit_var(var, o=sys.__stdout__, d = init(), all=False):
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"""Emit a variable to be sourced by a shell."""
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if getVarFlag(var, "python", d):
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return 0
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try:
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if all:
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oval = getVar(var, d, 0)
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val = getVar(var, d, 1)
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except KeyboardInterrupt:
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raise
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except:
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excname = str(sys.exc_info()[0])
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if excname == "bb.build.FuncFailed":
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raise
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o.write('# expansion of %s threw %s\n' % (var, excname))
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return 0
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if all:
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o.write('# %s=%s\n' % (var, oval))
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if type(val) is not types.StringType:
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return 0
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if getVarFlag(var, 'matchesenv', d):
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return 0
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if (var.find("-") != -1 or var.find(".") != -1 or var.find('{') != -1 or var.find('}') != -1 or var.find('+') != -1) and not all:
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return 0
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val.rstrip()
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if not val:
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return 0
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if getVarFlag(var, "func", d):
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# NOTE: should probably check for unbalanced {} within the var
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o.write("%s() {\n%s\n}\n" % (var, val))
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else:
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if getVarFlag(var, "export", d):
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o.write('export ')
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else:
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if not all:
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return 0
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# if we're going to output this within doublequotes,
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# to a shell, we need to escape the quotes in the var
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alter = re.sub('"', '\\"', val.strip())
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o.write('%s="%s"\n' % (var, alter))
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return 1
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def emit_env(o=sys.__stdout__, d = init(), all=False):
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"""Emits all items in the data store in a format such that it can be sourced by a shell."""
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env = keys(d)
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for e in env:
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if getVarFlag(e, "func", d):
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continue
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emit_var(e, o, d, all) and o.write('\n')
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for e in env:
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if not getVarFlag(e, "func", d):
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continue
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emit_var(e, o, d) and o.write('\n')
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def update_data(d):
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"""Modifies the environment vars according to local overrides and commands.
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Examples:
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Appending to a variable:
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>>> d = init()
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>>> setVar('TEST', 'this is a', d)
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>>> setVar('TEST_append', ' test', d)
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>>> setVar('TEST_append', ' of the emergency broadcast system.', d)
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>>> update_data(d)
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>>> print getVar('TEST', d)
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this is a test of the emergency broadcast system.
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Prepending to a variable:
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>>> setVar('TEST', 'virtual/libc', d)
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>>> setVar('TEST_prepend', 'virtual/tmake ', d)
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>>> setVar('TEST_prepend', 'virtual/patcher ', d)
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>>> update_data(d)
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>>> print getVar('TEST', d)
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virtual/patcher virtual/tmake virtual/libc
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Overrides:
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>>> setVar('TEST_arm', 'target', d)
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>>> setVar('TEST_ramses', 'machine', d)
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>>> setVar('TEST_local', 'local', d)
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>>> setVar('OVERRIDES', 'arm', d)
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>>> setVar('TEST', 'original', d)
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>>> update_data(d)
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>>> print getVar('TEST', d)
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target
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>>> setVar('OVERRIDES', 'arm:ramses:local', d)
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>>> setVar('TEST', 'original', d)
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>>> update_data(d)
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>>> print getVar('TEST', d)
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local
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"""
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debug(2, "update_data()")
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# can't do delete env[...] while iterating over the dictionary, so remember them
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dodel = []
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overrides = (getVar('OVERRIDES', d, 1) or "").split(':') or []
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|
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def applyOverrides(var, d):
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if not overrides:
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debug(1, "OVERRIDES not defined, nothing to do")
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return
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val = getVar(var, d)
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for o in overrides:
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if var.endswith("_" + o):
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l = len(o)+1
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name = var[:-l]
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d[name] = d[var]
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for s in keys(d):
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applyOverrides(s, d)
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sval = getVar(s, d) or ""
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|
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# Handle line appends:
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for (a, o) in getVarFlag(s, '_append', d) or []:
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# maybe the OVERRIDE was not yet added so keep the append
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if (o and o in overrides) or not o:
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delVarFlag(s, '_append', d)
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if o:
|
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if not o in overrides:
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continue
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sval+=a
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setVar(s, sval, d)
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|
|
# Handle line prepends
|
|
for (a, o) in getVarFlag(s, '_prepend', d) or []:
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# maybe the OVERRIDE was not yet added so keep the append
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if (o and o in overrides) or not o:
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delVarFlag(s, '_prepend', d)
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if o:
|
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if not o in overrides:
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continue
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sval=a+sval
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setVar(s, sval, d)
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|
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# Handle line deletions
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|
name = s + "_delete"
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nameval = getVar(name, d)
|
|
if nameval:
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sval = getVar(s, d)
|
|
if sval:
|
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new = ''
|
|
pattern = nameval.replace('\n','').strip()
|
|
for line in sval.split('\n'):
|
|
if line.find(pattern) == -1:
|
|
new = new + '\n' + line
|
|
setVar(s, new, d)
|
|
dodel.append(name)
|
|
|
|
# delete all environment vars no longer needed
|
|
for s in dodel:
|
|
delVar(s, d)
|
|
|
|
def inherits_class(klass, d):
|
|
val = getVar('__inherit_cache', d) or ""
|
|
if os.path.join('classes', '%s.bbclass' % klass) in val.split():
|
|
return True
|
|
return False
|
|
|
|
def _test():
|
|
"""Start a doctest run on this module"""
|
|
import doctest
|
|
from bb import data
|
|
doctest.testmod(data)
|
|
|
|
if __name__ == "__main__":
|
|
_test()
|