Source

SCons / test / chained-build.py

#!/usr/bin/env python
#
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# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

import TestSCons

test = TestSCons.TestSCons()

# During the development of 0.96, there was a --save-explain-info
# option for a brief moment that would surpress storing extra
# info in the .sconsign file(s).  At that time, this test used two
# working subdirectories to test both with and without the saved info.
# We eliminated the --save-explain-info option and the second working
# subdirectory here, but didn't go back and change all the filenames.
test.subdir('w1')

SConstruct1_contents = """\
def build(env, target, source):
    open(str(target[0]), 'wt').write(open(str(source[0]), 'rt').read())

env=Environment(BUILDERS={'B' : Builder(action=build)})
env.B('foo.mid', 'foo.in')
"""

SConstruct2_contents = """\
def build(env, target, source):
    open(str(target[0]), 'wt').write(open(str(source[0]), 'rt').read())

env=Environment(BUILDERS={'B' : Builder(action=build)})
env.B('foo.out', 'foo.mid')
"""

test.write(['w1', 'SConstruct1'], SConstruct1_contents)
test.write(['w1', 'SConstruct2'], SConstruct2_contents)
test.write(['w1', 'foo.in'], "foo.in 1")

test.run(chdir='w1',
         arguments="--max-drift=0 -f SConstruct1 foo.mid",
         stdout = test.wrap_stdout('build(["foo.mid"], ["foo.in"])\n'))

test.run(chdir='w1',
         arguments="--max-drift=0 -f SConstruct2 foo.out",
         stdout = test.wrap_stdout('build(["foo.out"], ["foo.mid"])\n'))

test.up_to_date(chdir='w1',
                options="--max-drift=0 -f SConstruct1",
                arguments="foo.mid")

test.up_to_date(chdir='w1',
                options="--max-drift=0 -f SConstruct2",
                arguments="foo.out")

test.sleep()  # make sure foo.in rewrite has new mod-time
test.write(['w1', 'foo.in'], "foo.in 2")

# Because we're using --max-drift=0, we use the cached csig value
# and think that foo.in hasn't changed even though it has on disk.
test.up_to_date(chdir='w1',
         options="--max-drift=0 -f SConstruct1",
         arguments="foo.mid")

# Now try with --max-drift disabled.  The build of foo.out should still
# be considered up-to-date, but the build of foo.mid now detects the
# change and rebuilds, too, which then causes a rebuild of foo.out.
test.up_to_date(chdir='w1',
                options="--max-drift=-1 -f SConstruct2",
                arguments="foo.out")

test.run(chdir='w1',
         arguments="--max-drift=-1 -f SConstruct1 foo.mid",
         stdout = test.wrap_stdout('build(["foo.mid"], ["foo.in"])\n'))

test.run(chdir='w1',
         arguments="--max-drift=-1 -f SConstruct2 foo.out",
         stdout = test.wrap_stdout('build(["foo.out"], ["foo.mid"])\n'))

test.pass_test()
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