import atexit
import sys

hash_format = GetOption('hash_format')
if not hash_format:
    # Override to SHA-256 to validate that override is effective
    hash_format = 'sha256'
    SetOption('hash_format', hash_format)

DefaultEnvironment(tools=[])
B = Builder(action = r'$PYTHON build.py $TARGETS $SOURCES')
env = Environment(tools=[], BUILDERS = { 'B' : B })
env['PYTHON'] = sys.executable
f1 = env.B(target = 'f1.out', source = 'f1.in')

def VerifyCsig():
    csig = f1[0].get_csig()
    if hash_format == 'md5':
        assert csig == 'fe06ae4170d4fead2c958439c738859e', csig
    elif hash_format == 'sha1':
        assert csig == 'efe5c6daa743540e9561934e3e18628b336013f7', csig
    elif hash_format == 'sha256':
        assert csig == 'a28bb79aa5ca8a5eb2dc5910a103d1a6312e79d73ed8054787cee78cc532a6aa', csig
    elif hash_format != 'testfailure':
        raise Exception('Hash format %s is not supported in '
                        'test/option/hash-format/SConstruct' % hash_format)
atexit.register(VerifyCsig)