path: root/test/implicit-cache/basic.py

#!/usr/bin/env python
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"""
Verify basic interactions of the --implicit-cache-* options.

This test used to set TargetSignatures('build') because we were
relying on the old behavior of non-essential changes in .h files
propagate to cause a rebuilt executable.  We now just rely on
the default Decider('content') behavior and only check for the
rebuild of the object file itself when necessary.
"""

import os.path

import TestSCons

_exe = TestSCons._exe
_obj = TestSCons._obj

prog = 'prog' + _exe
subdir_prog = os.path.join('subdir', 'prog' + _exe)
variant_prog = os.path.join('variant', 'prog' + _exe)
variant_prog_obj = os.path.join('variant', 'prog' + _obj)

args = prog + ' ' + subdir_prog + ' ' + variant_prog

test = TestSCons.TestSCons()

test.subdir('include', 'subdir', ['subdir', 'include'], 'inc2')

test.write('SConstruct', """
env = Environment(CPPPATH = Split('inc2 include'))
obj = env.Object(target='prog', source='subdir/prog.c')
env.Program(target='prog', source=obj)
SConscript('subdir/SConscript', "env")

VariantDir('variant', 'subdir', 0)
include = Dir('include')
env = Environment(CPPPATH=['inc2', include])
SConscript('variant/SConscript', "env")

def copy(target, source, env):
    open(str(target[0]), 'wt').write(open(str(source[0]), 'rt').read())
nodep = env.Command('nodeps.c', 'nodeps.in', action=copy)
env.Program('nodeps', 'nodeps.c')

env.Object(['one', 'two'], ['one.c'])
""")

test.write(['subdir', 'SConscript'],
"""
Import("env")
env.Program(target='prog', source='prog.c')
""")

test.write('nodeps.in', r"""
int
main(int argc, char *argv[])
{
    argv[argc++] = "--";
    return 0;
}
""")


test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 1\n"
#include <bar.h>
""")

test.write(['include', 'bar.h'], r"""
#define BAR_STRING "include/bar.h 1\n"
""")

test.write(['include', 'baz.h'], r"""
#define BAZ_STRING "include/baz.h 1\n"
""")

test.write(['subdir', 'prog.c'], r"""
#include <foo.h>
#include <stdio.h>

int
main(int argc, char *argv[])
{
    argv[argc++] = "--";
    printf("subdir/prog.c\n");
    printf(FOO_STRING);
    printf(BAR_STRING);
    return 0;
}
""")

test.write(['subdir', 'include', 'foo.h'], r"""
#define FOO_STRING "subdir/include/foo.h 1\n"
#include "bar.h"
""")

test.write(['subdir', 'include', 'bar.h'], r"""
#define BAR_STRING "subdir/include/bar.h 1\n"
""")

test.write('one.c' , r"""
#include <foo.h>

void one(void) { }
""")

test.run(arguments = "--implicit-cache " + args)

test.run(program = test.workpath(prog),
         stdout = "subdir/prog.c\ninclude/foo.h 1\ninclude/bar.h 1\n")

test.run(program = test.workpath(subdir_prog),
         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")

test.run(program = test.workpath(variant_prog),
         stdout = "subdir/prog.c\ninclude/foo.h 1\ninclude/bar.h 1\n")

test.up_to_date(arguments = args)



# Make sure implicit dependencies work right when one is modifed:
test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 2\n"
#include "bar.h"
""")

test.run(arguments = "--implicit-cache " + args)

test.run(program = test.workpath(prog),
         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")

test.run(program = test.workpath(subdir_prog),
         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")

test.run(program = test.workpath(variant_prog),
         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")

test.up_to_date(arguments = args)



# Make sure that changing the order of includes causes rebuilds and
# doesn't produce redundant rebuilds:
test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 2\n"
#include "bar.h"
#include "baz.h"
""")

test.run(arguments = "--implicit-cache " + args)

test.run(program = test.workpath(prog),
         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")

test.run(program = test.workpath(subdir_prog),
         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")

test.run(program = test.workpath(variant_prog),
         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")

test.up_to_date(arguments = args)



test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 2\n"
#include "baz.h"
#include "bar.h"
""")

test.run(arguments = "--implicit-cache " + args)

test.run(program = test.workpath(prog),
         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")

test.run(program = test.workpath(subdir_prog),
         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")

test.run(program = test.workpath(variant_prog),
         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")

test.up_to_date(arguments = args)



# Add inc2/foo.h that should shadow include/foo.h, but
# because of implicit dependency caching, scons doesn't
# detect this:
test.write(['inc2', 'foo.h'], r"""
#define FOO_STRING "inc2/foo.h 1\n"
#include <bar.h>
""")

test.run(arguments = "--implicit-cache " + args)

test.run(program = test.workpath(prog),
         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")

test.run(program = test.workpath(subdir_prog),
         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")

test.run(program = test.workpath(variant_prog),
         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")



# Now modifying include/foo.h should make scons aware of inc2/foo.h
test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 3\n"
#include "bar.h"
""")

test.run(arguments = "--implicit-cache " + args)

test.run(program = test.workpath(prog),
         stdout = "subdir/prog.c\ninc2/foo.h 1\ninclude/bar.h 1\n")

test.run(program = test.workpath(subdir_prog),
         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")

test.run(program = test.workpath(variant_prog),
         stdout = "subdir/prog.c\ninclude/foo.h 3\ninclude/bar.h 1\n")



# test a file with no dependencies where the source file is generated:
test.run(arguments = "--implicit-cache nodeps%s"%_exe)

test.write('nodeps.in', r"""
#include <foo.h>

int
main(int argc, char *argv[])
{
    argv[argc++] = "--";
    return 0;
}
""")

test.run(arguments = "--implicit-cache one%s"%_obj)



# Test forcing of implicit caching:
test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 3\n"
#include "bar.h"
""")

# Cache the dependencies of prog_obj:  foo.h and its included bar.h.
test.run(arguments = "--implicit-cache " + args)

# Now add baz.h to the implicit dependencies in foo.h.
test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 3\n"
#include "baz.h"
#include "bar.h"
""")

# Rebuild variant_prog_obj because the already-cached foo.h changed,
# but use --implicit-deps-unchanged to avoid noticing the addition
# of baz.h to the implicit dependencies.
test.not_up_to_date(options = "--implicit-deps-unchanged",
                    arguments = variant_prog_obj)

test.write(['include', 'baz.h'], r"""
#define BAZ_STRING "include/baz.h 2\n"
""")

# variant_prog_obj is still up to date, because it doesn't know about
# baz.h and therefore the change we just made to it.
test.up_to_date(options = "--implicit-deps-unchanged",
                arguments = variant_prog_obj)

# Now rebuild it normally.
test.not_up_to_date(arguments = variant_prog_obj)

# And rebuild its executable, just so everything's normal.
test.run(arguments = variant_prog)


# Test forcing rescanning:
test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 3\n"
#include "bar.h"
""")

test.run(arguments = "--implicit-cache " + args)

test.write(['include', 'foo.h'], r"""
#define FOO_STRING "include/foo.h 3\n"
#include "baz.h"
#include "bar.h"
""")

test.not_up_to_date(options = "--implicit-deps-unchanged",
                    arguments = variant_prog_obj)

test.write(['include', 'baz.h'], r"""
#define BAZ_STRING "include/baz.h 2\n"
""")

test.up_to_date(options = "--implicit-deps-unchanged",
                arguments = variant_prog_obj)

test.not_up_to_date(options = "--implicit-deps-changed",
                    arguments = variant_prog_obj)



test.pass_test()

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