1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
"""scons.Environment
XXX
"""
__revision__ = "Environment.py __REVISION__ __DATE__ __DEVELOPER__"
import copy
import re
import types
def Command():
pass # XXX
def Install():
pass # XXX
def InstallAs():
pass # XXX
_cv = re.compile(r'%([_a-zA-Z]\w*|{[_a-zA-Z]\w*})')
_self = None
def _deepcopy_atomic(x, memo):
return x
copy._deepcopy_dispatch[types.ModuleType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.ClassType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.FunctionType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.MethodType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.TracebackType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.FrameType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.FileType] = _deepcopy_atomic
class Environment:
"""Base class for construction Environments. These are
the primary objects used to communicate dependency and
construction information to the build engine.
Keyword arguments supplied when the construction Environment
is created are construction variables used to initialize the
Environment.
"""
def __init__(self, **kw):
self.Dictionary = {}
if kw.has_key('BUILDERS'):
builders = kw['BUILDERS']
if not type(builders) is types.ListType:
kw['BUILDERS'] = [builders]
else:
import scons.Defaults
kw['BUILDERS'] = scons.Defaults.Builders[:]
self.Dictionary.update(copy.deepcopy(kw))
for b in kw['BUILDERS']:
setattr(self, b.name, b)
def __cmp__(self, other):
return cmp(self.Dictionary, other.Dictionary)
def Builders(self):
pass # XXX
def Copy(self, **kw):
"""Return a copy of a construction Environment. The
copy is like a Python "deep copy"--that is, independent
copies are made recursively of each objects--except that
a reference is copied when an object is not deep-copyable
(like a function). There are no references to any mutable
objects in the original Environment.
"""
return copy.deepcopy(self)
def Scanners(self):
pass # XXX
def Update(self, **kw):
"""Update an existing construction Environment with new
construction variables and/or values.
"""
self.Dictionary.update(copy.deepcopy(kw))
def subst(self, string):
"""Recursively interpolates construction variables from the
Environment into the specified string, returning the expanded
result. Construction variables are specified by a % prefix
in the string and begin with an initial underscore or
alphabetic character followed by any number of underscores
or alphanumeric characters. The construction variable names
may be surrounded by curly braces to separate the name from
trailing characters.
"""
global _self
_self = self # XXX NOT THREAD SAFE, BUT HOW ELSE DO WE DO THIS?
def repl(m):
key = m.group(1)
if key[:1] == '{' and key[-1:] == '}':
key = key[1:-1]
if _self.Dictionary.has_key(key): return _self.Dictionary[key]
else: return ''
n = 1
while n != 0:
string, n = _cv.subn(repl, string)
return string
|
