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SCons / test / CacheDir / scanner-target.py

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#!/usr/bin/env python
#
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

"""
Test the case (reported by Jeff Petkau, bug #694744) where a target
is source for another target with a scanner, which used to cause us
to push the file to the CacheDir after the build signature had already
been cleared (as a sign that the built file should now be rescanned).
"""

import os.path
import shutil

import TestSCons

test = TestSCons.TestSCons()

test.subdir('cache')

test.write('SConstruct', """\
import SCons

CacheDir(r'%s')

def docopy(target,source,env):
    data = source[0].get_contents()
    f = open(target[0].rfile().get_abspath(), "wb")
    f.write(data)
    f.close()

def sillyScanner(node, env, dirs):
    print 'This is never called (unless we build file.out)'
    return []

SillyScanner = SCons.Scanner.Base(function = sillyScanner, skeys = ['.res'])

env = Environment(tools=[],
                  SCANNERS = [SillyScanner],
                  BUILDERS = {})

r = env.Command('file.res', 'file.ma', docopy)

env.Command('file.out', r, docopy)

# make r the default. Note that we don't even try to build file.out,
# and so SillyScanner never runs. The bug is the same if we build
# file.out, though.
Default(r)
""" % test.workpath('cache'))

test.write('file.ma', "file.ma\n")

test.run()

test.must_not_exist(test.workpath('cache', 'N', 'None'))

test.pass_test()