#!/usr/bin/env python
#
# MIT License
#
# Copyright The SCons Foundation
#
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"""
Verify that SWIG include directives produce the correct dependencies
in cases of recursive inclusion.
"""

import os
import sys
import TestSCons
import TestCmd
from SCons.Defaults import DefaultEnvironment

DefaultEnvironment( tools = [ 'swig' ] )

test = TestSCons.TestSCons()

# Check for prerequisites of this test.
if not test.where_is('swig'):
    test.skip_test('Can not find installed "swig", skipping test.%s' % os.linesep)

python, python_include, python_libpath, python_lib = \
             test.get_platform_python_info(python_h_required=True)

if TestCmd.IS_WINDOWS:
    if not os.path.isfile(os.path.join(python_libpath, python_lib)):
        test.skip_test(f"Can not find python lib {python_libh!r}, skipping test.\n")

test.write("recursive.h", """\
/* An empty header file. */
""")

test.write("main.h", """\
#include "recursive.h"
""")

test.write("main.c", """\
#include "main.h"
""")

test.write("mod.i", """\
%module mod

%include "main.h"

#include "main.h"
""")


if TestCmd.IS_WINDOWS:
    if TestCmd.IS_64_BIT:
        TARGET_ARCH = "TARGET_ARCH = 'x86_64',"
    else:
        TARGET_ARCH = "TARGET_ARCH = 'x86',"
else:
    TARGET_ARCH = ""
test.write('SConstruct', f"""\
import os
import sys
import sysconfig

DefaultEnvironment()
env = Environment(
    {TARGET_ARCH}
    SWIGFLAGS=['-python'],
    CPPPATH=[sysconfig.get_config_var("INCLUDEPY")],
    SHLIBPREFIX="",
    tools=['default', 'swig'],
)

if sys.platform == 'darwin':
    env['LIBS'] = [f'python{sys.version_info.major}.{sys.version_info.minor}']
    env.Append(LIBPATH=[sysconfig.get_config_var("LIBDIR")])
elif sys.platform == 'win32':
    env.Append(LIBS=[f'python{sys.version_info.major}{sys.version_info.minor}.lib'])
    env.Append(LIBPATH=[os.path.dirname(sys.executable) + "/libs"])

env.SharedLibrary('mod', ["mod.i", "main.c"])
""")

if sys.platform == 'win32':
    object_suffix = ".obj"
elif sys.platform == 'sunos5':
    object_suffix = ".pic.o"
else:
    object_suffix = ".os"

expectMain = """\
+-main%s
  +-main.c
  +-main.h
  +-recursive.h""" % object_suffix

expectMod = """\
+-mod_wrap%s
  +-mod_wrap.c
  | +-mod.i
  | +-main.h
  | +-recursive.h""" % object_suffix

# Validate that the recursive dependencies are found with SWIG scanning first.
test.run( arguments = '--tree=all mod_wrap'+object_suffix +' main'+object_suffix)

test.must_contain_all( test.stdout(), expectMain )
test.must_contain_all( test.stdout(), expectMod )


# Validate that the recursive dependencies are found consistently.
test.run( arguments = '--tree=all main'+object_suffix +' mod_wrap'+object_suffix)

test.must_contain_all( test.stdout(), expectMain )
test.must_contain_all( test.stdout(), expectMod )

test.run()
test.up_to_date()

test.pass_test()

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