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#! /usr/bin/env python
# encoding: utf-8
import sys
if sys.hexversion < 0x020400f0: from sets import Set as set
import os,copy,re
import Logs,Options,Utils
from Constants import*
re_imp=re.compile('^(#)*?([^#=]*?)\ =\ (.*?)$',re.M)
class Environment(object):
__slots__=("table","parent")
def __init__(self,filename=None):
self.table={}
if filename:
self.load(filename)
def __contains__(self,key):
if key in self.table:return True
try:return self.parent.__contains__(key)
except AttributeError:return False
def __str__(self):
keys=set()
cur=self
while cur:
keys.update(cur.table.keys())
cur=getattr(cur,'parent',None)
keys=list(keys)
keys.sort()
return"\n".join(["%r %r"%(x,self.__getitem__(x))for x in keys])
def __getitem__(self,key):
try:
while 1:
x=self.table.get(key,None)
if not x is None:
return x
self=self.parent
except AttributeError:
return[]
def __setitem__(self,key,value):
self.table[key]=value
def __delitem__(self,key):
del self.table[key]
def pop(self,key,*args):
if len(args):
return self.table.pop(key,*args)
return self.table.pop(key)
def set_variant(self,name):
self.table[VARIANT]=name
def variant(self):
try:
while 1:
x=self.table.get(VARIANT,None)
if not x is None:
return x
self=self.parent
except AttributeError:
return DEFAULT
def copy(self):
newenv=Environment()
newenv.parent=self
return newenv
def detach(self):
tbl=self.get_merged_dict()
try:
delattr(self,'parent')
except AttributeError:
pass
else:
keys=tbl.keys()
for x in keys:
tbl[x]=copy.deepcopy(tbl[x])
self.table=tbl
def get_flat(self,key):
s=self[key]
if isinstance(s,str):return s
return' '.join(s)
def _get_list_value_for_modification(self,key):
try:
value=self.table[key]
except KeyError:
try:value=self.parent[key]
except AttributeError:value=[]
if isinstance(value,list):
value=value[:]
else:
value=[value]
else:
if not isinstance(value,list):
value=[value]
self.table[key]=value
return value
def append_value(self,var,value):
current_value=self._get_list_value_for_modification(var)
if isinstance(value,list):
current_value.extend(value)
else:
current_value.append(value)
def prepend_value(self,var,value):
current_value=self._get_list_value_for_modification(var)
if isinstance(value,list):
current_value=value+current_value
self.table[var]=current_value
else:
current_value.insert(0,value)
def append_unique(self,var,value):
current_value=self._get_list_value_for_modification(var)
if isinstance(value,list):
for value_item in value:
if value_item not in current_value:
current_value.append(value_item)
else:
if value not in current_value:
current_value.append(value)
def get_merged_dict(self):
table_list=[]
env=self
while 1:
table_list.insert(0,env.table)
try:env=env.parent
except AttributeError:break
merged_table={}
for table in table_list:
merged_table.update(table)
return merged_table
def store(self,filename):
file=open(filename,'w')
merged_table=self.get_merged_dict()
keys=list(merged_table.keys())
keys.sort()
for k in keys:file.write('%s = %r\n'%(k,merged_table[k]))
file.close()
def load(self,filename):
tbl=self.table
code=Utils.readf(filename)
for m in re_imp.finditer(code):
g=m.group
tbl[g(2)]=eval(g(3))
Logs.debug('env: %s',self.table)
def get_destdir(self):
if self.__getitem__('NOINSTALL'):return''
return Options.options.destdir
def update(self,d):
for k,v in d.iteritems():
self[k]=v
def __getattr__(self,name):
if name in self.__slots__:
return object.__getattr__(self,name)
else:
return self[name]
def __setattr__(self,name,value):
if name in self.__slots__:
object.__setattr__(self,name,value)
else:
self[name]=value
def __delattr__(self,name):
if name in self.__slots__:
object.__delattr__(self,name)
else:
del self[name]
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