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SCons / test / implicit / IMPLICIT_COMMAND_DEPENDENCIES.py

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

"""
Verify that the $IMPLICIT_COMMAND_DEPENDENCIES variable controls
whether or not the implicit dependency on executed commands
is added to targets.
"""

import TestSCons

python = TestSCons.python
_python_ = TestSCons._python_

test = TestSCons.TestSCons()

generate_build_py_py_contents = """\
#!%(python)s
import os
import sys

open(sys.argv[1], 'w').write('''\
#!/usr/bin/env %(python)s
import os
import sys
fp = open(sys.argv[1], 'wb')
args = [os.path.split(sys.argv[0])[1]] + sys.argv[1:]
fp.write(" ".join(args) + '\\\\n' + '%(extra)s')
for infile in sys.argv[2:]:
    fp.write(open(infile, 'rb').read())
fp.close()
''')
os.chmod(sys.argv[1], 0755)

"""

extra = ''
test.write('generate_build_py.py', generate_build_py_py_contents % locals())

test.write('SConstruct', """
generate = Builder(action = r'%(_python_)s $GENERATE $TARGET')
build = Builder(action = r'$BUILD_PY $TARGET $SOURCES')
env = Environment(BUILDERS = {
                        'GenerateBuild' : generate,
                        'BuildFile' : build,
                  },
                  GENERATE = 'generate_build_py.py',
                  BUILD_PY = 'build.py',
                  )
env.PrependENVPath('PATH', '.')
env.PrependENVPath('PATHEXT', '.PY')
env0        = env.Clone(IMPLICIT_COMMAND_DEPENDENCIES = 0)
env1        = env.Clone(IMPLICIT_COMMAND_DEPENDENCIES = 1)
envNone     = env.Clone(IMPLICIT_COMMAND_DEPENDENCIES = None)
envFalse    = env.Clone(IMPLICIT_COMMAND_DEPENDENCIES = False)
envTrue     = env.Clone(IMPLICIT_COMMAND_DEPENDENCIES = True)

build_py = env.GenerateBuild('${BUILD_PY}', [])
AlwaysBuild(build_py)

env.BuildFile('file.out',               'file.in')
env0.BuildFile('file0.out',             'file.in')
env1.BuildFile('file1.out',             'file.in')
envNone.BuildFile('fileNone.out',       'file.in')
envFalse.BuildFile('fileFalse.out',     'file.in')
envTrue.BuildFile('fileTrue.out',       'file.in')
envTrue.BuildFile('fileQuote.out',      'file.in', BUILD_PY='"build.py"')
""" % locals())



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

test.run(arguments = '--tree=all .')

expect_none = 'build.py %s file.in\nfile.in\n'

test.must_match('file.out',         expect_none % 'file.out')
test.must_match('file0.out',        expect_none % 'file0.out')
test.must_match('file1.out',        expect_none % 'file1.out')
test.must_match('fileNone.out',     expect_none % 'fileNone.out')
test.must_match('fileFalse.out',    expect_none % 'fileFalse.out')
test.must_match('fileTrue.out',     expect_none % 'fileTrue.out')
test.must_match('fileQuote.out',    expect_none % 'fileQuote.out')



extra = 'xyzzy\\\\n'
test.write('generate_build_py.py', generate_build_py_py_contents % locals())

test.run(arguments = '--tree=all .')

expect_extra = 'build.py %s file.in\nxyzzy\nfile.in\n'

test.must_match('file.out',         expect_extra % 'file.out')
test.must_match('file0.out',        expect_none % 'file0.out')
test.must_match('file1.out',        expect_extra % 'file1.out')
test.must_match('fileNone.out',     expect_none % 'fileNone.out')
test.must_match('fileFalse.out',    expect_none % 'fileFalse.out')
test.must_match('fileTrue.out',     expect_extra % 'fileTrue.out')
test.must_match('fileQuote.out',    expect_extra % 'fileQuote.out')


test.pass_test()

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