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#!/usr/bin/env python
#
# __COPYRIGHT__
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# 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
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
"""
Test case for the bug report:
"[ 1088979 ] Unnecessary rebuild with generated header file"
(<http://sourceforge.net/tracker/index.php?func=detail&aid=1088979&group_id=30337&atid=398971>).
Unnecessary rebuild with generated header file
Scons rebuilds some nodes when invoked twice. The
trigger seems to be a generated C++ source file that
includes a header file that also is generated.
A tarball with a minimal test case is attached.
Transcript for reproducing:
cd /tmp
tar xzf scons_rebuild_debug.tar.gz
cd scons_rebuild_debug
scons target.o
scons target.o
Note that the bug is not triggered when scons is run
without arguments.
This may be a duplicate to bug 1019683.
"""
import os
import sys
import TestSCons
test = TestSCons.TestSCons()
_obj = TestSCons._obj
if sys.platform == 'win32':
generator_name = 'generator.bat'
test.write(generator_name, '@echo #include "header.hh"')
kernel_action = "$SOURCES > $TARGET"
else:
generator_name = 'generator.sh'
test.write(generator_name, 'echo \'#include "header.hh"\'')
kernel_action = "sh $SOURCES > $TARGET"
test.write('SConstruct', """\
env = Environment()
kernelDefines = env.Command("header.hh",
[],
Touch("$TARGET"))
kernelImporterSource = env.Command(
"generated.cc", ["%s"],
"%s")
kernelImporter = env.Program(
kernelImporterSource + ["main.cc"])
kernelImports = env.Command(
"KernelImport.hh", kernelImporter,
".%s$SOURCE > $TARGET")
osLinuxModule = env.StaticObject(
["target.cc"])
""" % (generator_name, kernel_action, os.sep))
test.write('main.cc', """\
int
main(int, char *[])
{}
""")
test.write('target.cc', """\
#if 0
#include "KernelImport.hh"
#endif
""")
test.run(arguments = 'target' + _obj)
expected_stdout = """\
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
scons: `target%(_obj)s' is up to date.
scons: done building targets.
""" % locals()
test.run(arguments = 'target' + _obj, stdout=expected_stdout)
test.pass_test()
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