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25 __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
28 Verify that Scanners are not called if a previous --implicit-cache
29 run stored an empty list of implicit dependencies.
34 test = TestSCons.TestSCons()
36 test.write('SConstruct', r"""
39 def scan(node, env, envkey, arg):
40 print 'XScanner: node =', os.path.split(str(node))[1]
43 def exists_check(node, env):
44 return os.path.exists(str(node))
46 XScanner = Scanner(name = 'XScanner',
49 scan_check = exists_check,
52 def echo(env, target, source):
53 t = os.path.split(str(target[0]))[1]
54 s = os.path.split(str(source[0]))[1]
55 print 'create %s from %s' % (t, s)
56 open(t, 'wb').write(open(s, 'rb').read())
58 Echo = Builder(action = Action(echo, None),
62 env = Environment(BUILDERS = {'Echo':Echo}, SCANNERS = [XScanner])
64 f1 = env.Echo(source=['f1_in'], target=['f1_out'])
67 test.write('f1_in.x', 'f1_in.x\n')
69 expect = test.wrap_stdout("""\
70 XScanner: node = f1_in.x
71 create f1_out.x from f1_in.x
74 test.run(arguments = '--implicit-cache .', stdout = expect)
76 # Run it again, and the output must contain only the "up to date" message,
77 # *not* the line printed by the XScanner function.
79 test.up_to_date(options = '--implicit-cache', arguments = '.')