Source

SCons / test / explain / alias-order.py

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

"""
Verify a lot of the basic operation of the --debug=explain option.
"""

import TestSCons

_python_ = TestSCons._python_

test = TestSCons.TestSCons()

args = '--debug=explain target2.dat'

test.subdir('src')
test.write(['src', 'SConstruct'],"""
env = Environment()

def action( source, target, env ):
    f = open( str(target[0]), 'w' )
    f.write( source[0].get_contents())
    f.close()

builder = env.Builder( action=action )

builder( env, target = "target1.dat", source = "source1.dat" )
alias = env.Alias( "alias", "source2.dat" )
builder( env, target = "target2.dat", source = ["target1.dat"] )
env.Depends( "target2.dat", alias )
"""
)

test.write(["src", "source1.dat"], "a" )
test.write(["src", "source2.dat"], "a" )

expect = test.wrap_stdout("""\
scons: building `target1.dat' because it doesn't exist
action(["target1.dat"], ["source1.dat"])
scons: building `target2.dat' because it doesn't exist
action(["target2.dat"], ["target1.dat"])
""")

test.run(chdir='src', arguments=args, stdout=expect)

test.write(["src", "source1.dat"], "b" )

expect = test.wrap_stdout("""\
scons: rebuilding `target1.dat' because `source1.dat' changed
action(["target1.dat"], ["source1.dat"])
scons: rebuilding `target2.dat' because `target1.dat' changed
action(["target2.dat"], ["target1.dat"])
""")

test.run(chdir='src', arguments=args, stdout=expect)


test.pass_test()

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