#!/usr/bin/env python
#
# __COPYRIGHT__
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# a copy of this software and associated documentation files (the
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# without limitation the rights to use, copy, modify, merge, publish,
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# permit persons to whom the Software is furnished to do so, subject to
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

"""
Test changing the C source files based on an always-executed revision
extraction and substitution.
"""

import os.path

import TestSCons

_python_ = TestSCons._python_

test = TestSCons.TestSCons()

test.write('getrevision', """
#!/usr/bin/env python
import string
print string.strip(open('revnum.in','rb').read())
""")

test.write('SConstruct', """
import re
import string

def subrevision(target, source ,env):
    orig = target[0].get_contents()
    new = re.sub('\$REV.*?\$',
                 '$REV: %%s$'%%string.strip(source[0].get_contents()),
                 target[0].get_contents())
    outf = open(str(target[0]),'wb')
    outf.write(new)
    outf.close()

SubRevision = Action(subrevision)

env=Environment()
content_env=env.Clone()
content_env.TargetSignatures('content')
content_env.Command('revision.in', [], '%(_python_)s getrevision > $TARGET')
content_env.AlwaysBuild('revision.in')
env.Precious('main.c')
env.Command('main.c', 'revision.in', SubRevision)
exe = env.Program('main.c')
env.Default(exe)
""" % locals())

test.write('main.c', """\
#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
int
main(int argc, char *argv[])
{
    printf("Revision $REV$\\n");
    exit (0);
}
""")

test.write('revnum.in', '3.2\n')

prog = 'main' + TestSCons._exe

light_build=test.wrap_stdout("""\
%(_python_)s getrevision > revision.in
""" % locals())

test.run(arguments='.')
test.must_exist(prog)
test.run(program=test.workpath(prog), stdout='Revision $REV: 3.2$\n')

test.run(arguments='.', stdout=light_build)
test.must_exist(prog)

test.run(arguments='.', stdout=light_build)
test.must_exist(prog)

test.write('revnum.in', '3.3\n')

test.run(arguments='.')
test.must_exist(prog)
test.run(program=test.workpath(prog), stdout='Revision $REV: 3.3$\n')

test.pass_test()