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
115
116
117
118
119
120
121
|
"""SCons.Builder
XXX
"""
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
import os
import SCons.Node.FS
import SCons.Util
import string
import types
class Builder:
"""Base class for Builders, objects that create output
nodes (files) from input nodes (files).
"""
def __init__(self, name = None,
action = None,
input_suffix = None,
output_suffix = None,
node_factory = SCons.Node.FS.default_fs.File):
self.name = name
self.action = Action(action)
self.insuffix = input_suffix
self.outsuffix = output_suffix
self.node_factory = node_factory
if not self.insuffix is None and self.insuffix[0] != '.':
self.insuffix = '.' + self.insuffix
if not self.outsuffix is None and self.outsuffix[0] != '.':
self.outsuffix = '.' + self.outsuffix
def __cmp__(self, other):
return cmp(self.__dict__, other.__dict__)
def __call__(self, env, target = None, source = None):
tlist = SCons.Util.scons_str2nodes(target)
slist = SCons.Util.scons_str2nodes(source)
for t in tlist:
t.builder_set(self)
t.env_set(env)
t.derived = 1
t.add_source(slist)
if len(tlist) == 1:
tlist = tlist[0]
return tlist
def execute(self, **kw):
"""Execute a builder's action to create an output object.
"""
apply(self.action.execute, (), kw)
print_actions = 1;
execute_actions = 1;
def Action(act):
"""A factory for action objects."""
if type(act) == types.FunctionType:
return FunctionAction(act)
elif type(act) == types.StringType:
return CommandAction(act)
else:
return None
class ActionBase:
"""Base class for actions that create output objects.
We currently expect Actions will only be accessible through
Builder objects, so they don't yet merit their own module."""
def __cmp__(self, other):
return cmp(self.__dict__, other.__dict__)
def show(self, string):
print string
class CommandAction(ActionBase):
"""Class for command-execution actions."""
def __init__(self, string):
self.command = string
def execute(self, **kw):
cmd = self.command % kw
if print_actions:
self.show(cmd)
if execute_actions:
pid = os.fork()
if not pid:
# Child process.
args = string.split(cmd)
try:
ENV = kw['ENV']
except:
import SCons.Defaults
ENV = SCons.Defaults.ENV
os.execvpe(args[0], args, ENV)
else:
# Parent process.
os.waitpid(pid, 0)
class FunctionAction(ActionBase):
"""Class for Python function actions."""
def __init__(self, function):
self.function = function
def execute(self, **kw):
# if print_actions:
# XXX: WHAT SHOULD WE PRINT HERE?
if execute_actions:
self.function(kw)
|