8 # Copyright (c) 2001, 2002 Steven Knight
10 # Permission is hereby granted, free of charge, to any person obtaining
11 # a copy of this software and associated documentation files (the
12 # "Software"), to deal in the Software without restriction, including
13 # without limitation the rights to use, copy, modify, merge, publish,
14 # distribute, sublicense, and/or sell copies of the Software, and to
15 # permit persons to whom the Software is furnished to do so, subject to
16 # the following conditions:
18 # The above copyright notice and this permission notice shall be included
19 # in all copies or substantial portions of the Software.
21 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
22 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
23 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
54 if ' ' in x or '\t' in x:
59 if os.name == 'posix':
62 "escape shell special characters"
64 special = '"\'`&;><| \t#()*?$~!'
66 arg = string.replace(arg, slash, slash+slash)
68 arg = string.replace(arg, c, slash+c)
72 # If the env command exists, then we can use os.system()
73 # to spawn commands, otherwise we fall back on os.fork()/os.exec().
74 # os.system() is prefered because it seems to work better with
75 # threads (i.e. -j) and is more efficient than forking Python.
76 if SCons.Util.WhereIs('env'):
77 def defaultSpawn(cmd, args, env):
80 for key in env.keys():
81 s = s + '%s=%s '%(key, escape(env[key]))
83 s = s + escape(string.join(map(quote, args)))
85 s = string.join(map(quote, args))
87 return os.system(s) >> 8
89 def defaultSpawn(cmd, args, env):
94 args = ['sh', '-c', string.join(map(quote, args))]
96 os.execvpe('sh', args, env)
98 exitval = exitvalmap[e[0]]
99 sys.stderr.write("scons: %s: %s\n" % (cmd, e[1]))
103 pid, stat = os.waitpid(pid, 0)
107 elif os.name == 'nt':
109 def pathsearch(cmd, env):
110 # In order to deal with the fact that 1.5.2 doesn't have
111 # os.spawnvpe(), roll our own PATH search.
112 if os.path.isabs(cmd):
113 if not os.path.exists(cmd):
114 exts = env['PATHEXT']
115 if not SCons.Util.is_List(exts):
116 exts = string.split(exts, os.pathsep)
119 if os.path.exists(f):
125 if not SCons.Util.is_List(path):
126 path = string.split(path, os.pathsep)
127 exts = env['PATHEXT']
128 if not SCons.Util.is_List(exts):
129 exts = string.split(exts, os.pathsep)
133 pairs.append((dir, e))
134 for dir, ext in pairs:
135 f = os.path.join(dir, cmd)
138 if os.path.exists(f):
142 # Attempt to find cmd.exe (for WinNT/2k/XP) or
143 # command.com for Win9x
146 # First see if we can look in the registry...
147 if SCons.Util.can_read_reg:
149 # Look for Windows NT system root
150 k=SCons.Util.RegOpenKeyEx(SCons.Util.hkey_mod.HKEY_LOCAL_MACHINE,
151 'Software\\Microsoft\\Windows NT\\CurrentVersion')
152 val, tok = SCons.Util.RegQueryValueEx(k, 'SystemRoot')
153 cmd_interp = os.path.join(val, 'System32\\cmd.exe')
154 except SCons.Util.RegError:
156 # Okay, try the Windows 9x system root
157 k=SCons.Util.RegOpenKeyEx(SCons.Util.hkey_mod.HKEY_LOCAL_MACHINE,
158 'Software\\Microsoft\\Windows\\CurrentVersion')
159 val, tok = SCons.Util.RegQueryValueEx(k, 'SystemRoot')
160 cmd_interp = os.path.join(val, 'command.com')
164 cmd_interp = pathsearch('cmd', os.environ)
166 cmd_interp = pathsearch('command', os.environ)
168 # The upshot of all this is that, if you are using Python 1.5.2,
169 # you had better have cmd or command.com in your PATH when you run
172 def defaultSpawn(cmd, args, env):
174 sys.stderr.write("scons: Could not find command interpreter, is it in your PATH?\n")
178 args = [cmd_interp, '/C', quote(string.join(map(quote, args)))]
179 ret = os.spawnve(os.P_WAIT, cmd_interp, args, env)
181 ret = exitvalmap[e[0]]
182 sys.stderr.write("scons: %s: %s\n" % (cmd, e[1]))
185 def defaultSpawn(cmd, args, env):
186 sys.stderr.write("scons: Unknown os '%s', cannot spawn command interpreter.\n" % os.name)
187 sys.stderr.write("scons: Set your command handler with SetCommandHandler().\n")
192 def SetCommandHandler(func):
196 def GetCommandHandler():
200 class CommandGenerator:
202 Wraps a command generator function so the Action() factory
203 function can tell a generator function from a function action.
205 def __init__(self, generator):
206 self.generator = generator
208 def _do_create_action(act):
209 """This is the actual "implementation" for the
210 Action factory method, below. This handles the
211 fact that passing lists to Action() itself has
212 different semantics than passing lists as elements
215 The former will create a ListAction, the latter
216 will create a CommandAction by converting the inner
217 list elements to strings."""
219 if isinstance(act, ActionBase):
221 elif SCons.Util.is_List(act):
222 return CommandAction(act)
223 elif isinstance(act, CommandGenerator):
224 return CommandGeneratorAction(act.generator)
226 return FunctionAction(act)
227 elif SCons.Util.is_String(act):
228 var=SCons.Util.get_environment_var(act)
230 # This looks like a string that is purely an Environment
231 # variable reference, like "$FOO" or "${FOO}". We do
232 # something special here...we lazily evaluate the contents
233 # of that Environment variable, so a user could but something
234 # like a function or a CommandGenerator in that variable
235 # instead of a string.
236 return CommandGeneratorAction(LazyCmdGenerator(var))
237 listCmds = map(lambda x: CommandAction(string.split(x)),
238 string.split(act, '\n'))
239 if len(listCmds) == 1:
242 return ListAction(listCmds)
247 """A factory for action objects."""
248 if SCons.Util.is_List(act):
249 acts = filter(lambda x: not x is None,
250 map(_do_create_action, act))
254 return ListAction(acts)
256 return _do_create_action(act)
259 """Base class for actions that create output objects."""
260 def __cmp__(self, other):
261 return cmp(self.__dict__, other.__dict__)
263 def show(self, string):
266 def subst_dict(self, **kw):
267 """Create a dictionary for substitution of construction
270 This translates the following special arguments:
272 env - the construction environment itself,
273 the values of which (CC, CCFLAGS, etc.)
274 are copied straight into the dictionary
276 target - the target (object or array of objects),
277 used to generate the TARGET and TARGETS
278 construction variables
280 source - the source (object or array of objects),
281 used to generate the SOURCES and SOURCE
282 construction variables
284 Any other keyword arguments are copied into the
288 if kw.has_key('env'):
289 dict.update(kw['env'])
299 if kw.has_key('target'):
302 if not SCons.Util.is_List(t):
306 except (IndexError, AttributeError):
308 dict['TARGETS'] = SCons.Util.PathList(map(os.path.normpath, map(str, t)))
310 dict['TARGET'] = dict['TARGETS'][0]
312 if kw.has_key('source'):
316 except AttributeError:
320 if not SCons.Util.is_List(s):
322 dict['SOURCES'] = SCons.Util.PathList(map(os.path.normpath, map(rstr, s)))
324 dict['SOURCE'] = dict['SOURCES'][0]
330 def _string_from_cmd_list(cmd_list):
331 """Takes a list of command line arguments and returns a pretty
332 representation for printing."""
335 if ' ' in arg or '\t' in arg:
336 arg = '"' + arg + '"'
338 return string.join(cl)
340 _rm = re.compile(r'\$[()]')
341 _remove = re.compile(r'\$\(([^\$]|\$[^\(])*?\$\)')
343 class EnvDictProxy(UserDict.UserDict):
344 """This is a dictionary-like class that contains the
345 Environment dictionary we pass to FunctionActions
346 and CommandGeneratorActions.
348 In addition to providing
349 normal dictionary-like access to the variables in the
350 Environment, it also exposes the functions subst()
351 and subst_list(), allowing users to easily do variable
352 interpolation when writing their FunctionActions
353 and CommandGeneratorActions."""
355 def __init__(self, env):
356 UserDict.UserDict.__init__(self, env)
358 def subst(self, string, raw=0):
363 return SCons.Util.scons_subst(string, self.data, {}, regex_remove)
365 def subst_list(self, string, raw=0):
370 return SCons.Util.scons_subst_list(string, self.data, {}, regex_remove)
372 class CommandAction(ActionBase):
373 """Class for command-execution actions."""
374 def __init__(self, cmd):
377 self.cmd_list = map(SCons.Util.to_String, cmd)
379 def execute(self, **kw):
380 dict = apply(self.subst_dict, (), kw)
382 cmd_list = SCons.Util.scons_subst_list(self.cmd_list, dict, {}, _rm)
383 for cmd_line in cmd_list:
386 self.show(_string_from_cmd_list(cmd_line))
389 ENV = kw['env']['ENV']
393 import SCons.Environment
394 default_ENV = SCons.Environment.Environment()['ENV']
396 ret = spawn(cmd_line[0], cmd_line, ENV)
401 def _sig_dict(self, kw):
402 """Supply a dictionary for use in computing signatures.
404 For signature purposes, it doesn't matter what targets or
405 sources we use, so long as we use the same ones every time
406 so the signature stays the same. We supply an array of two
407 of each to allow for distinction between TARGET and TARGETS.
409 kw['target'] = ['__t1__', '__t2__']
410 kw['source'] = ['__s1__', '__s2__']
411 return apply(self.subst_dict, (), kw)
413 def get_raw_contents(self, **kw):
414 """Return the complete contents of this action's command line.
416 return SCons.Util.scons_subst(string.join(self.cmd_list),
417 self._sig_dict(kw), {})
419 def get_contents(self, **kw):
420 """Return the signature contents of this action's command line.
422 This strips $(-$) and everything in between the string,
423 since those parts don't affect signatures.
425 return SCons.Util.scons_subst(string.join(self.cmd_list),
426 self._sig_dict(kw), {}, _remove)
428 class CommandGeneratorAction(ActionBase):
429 """Class for command-generator actions."""
430 def __init__(self, generator):
431 self.generator = generator
433 def __generate(self, kw, for_signature):
436 # Wrap the environment dictionary in an EnvDictProxy
437 # object to make variable interpolation easier for the
440 args['for_signature'] = for_signature
441 if args.has_key("env") and not isinstance(args["env"], EnvDictProxy):
442 args["env"] = EnvDictProxy(args["env"])
444 # ensure that target is a list, to make it easier to write
445 # generator functions:
446 if args.has_key("target") and not SCons.Util.is_List(args["target"]):
447 args["target"] = [args["target"]]
449 ret = apply(self.generator, (), args)
450 gen_cmd = Action(ret)
452 raise SCons.Errors.UserError("Object returned from command generator: %s cannot be used to create an Action." % repr(ret))
455 def execute(self, **kw):
456 return apply(self.__generate(kw, 0).execute, (), kw)
458 def get_contents(self, **kw):
459 """Return the signature contents of this action's command line.
461 This strips $(-$) and everything in between the string,
462 since those parts don't affect signatures.
464 return apply(self.__generate(kw, 1).get_contents, (), kw)
466 class LazyCmdGenerator:
467 """This is a simple callable class that acts as a command generator.
468 It holds on to a key into an Environment dictionary, then waits
469 until execution time to see what type it is, then tries to
470 create an Action out of it."""
471 def __init__(self, var):
472 self.var = SCons.Util.to_String(var)
474 def __call__(self, env, **kw):
475 if env.has_key(self.var):
478 # The variable reference substitutes to nothing.
481 class FunctionAction(ActionBase):
482 """Class for Python function actions."""
483 def __init__(self, function):
484 self.function = function
486 def execute(self, **kw):
488 # XXX: WHAT SHOULD WE PRINT HERE?
490 if kw.has_key('target') and not \
491 SCons.Util.is_List(kw['target']):
492 kw['target'] = [ kw['target'] ]
493 if kw.has_key('source'):
497 except AttributeError:
499 if not SCons.Util.is_List(kw['source']):
500 kw['source'] = [ kw['source'] ]
501 kw['source'] = map(rfile, kw['source'])
502 if kw.has_key("env") and not isinstance(kw["env"], EnvDictProxy):
503 kw["env"] = EnvDictProxy(kw["env"])
504 return apply(self.function, (), kw)
506 def get_contents(self, **kw):
507 """Return the signature contents of this callable action.
509 By providing direct access to the code object of the
510 function, Python makes this extremely easy. Hooray!
512 #XXX DOES NOT ACCOUNT FOR CHANGES IN ENVIRONMENT VARIABLES
513 #THE FUNCTION MAY USE
515 # "self.function" is a function.
516 code = self.function.func_code.co_code
518 # "self.function" is a callable object.
519 code = self.function.__call__.im_func.func_code.co_code
522 class ListAction(ActionBase):
523 """Class for lists of other actions."""
524 def __init__(self, list):
525 self.list = map(lambda x: Action(x), list)
527 def execute(self, **kw):
529 r = apply(l.execute, (), kw)
534 def get_contents(self, **kw):
535 """Return the signature contents of this action list.
537 Simple concatenation of the signatures of the elements.
540 return reduce(lambda x, y, kw=kw: x + str(apply(y.get_contents, (), kw)), self.list, "")