#!/usr/bin/env python
#     Copyright 2013, Kay Hayen, mailto:kay.hayen@gmail.com
#
#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.
#

from __future__ import print_function

import os, sys, subprocess, difflib, re, tempfile


nuitka1 = sys.argv[1]
nuitka2 = sys.argv[2]
filename = sys.argv[3]

print( "Comparing output of '%s' using '%s' <-> '%s' ..." % ( filename, nuitka1, nuitka2 ))


extra_options = os.environ.get( "NUITKA_EXTRA_OPTIONS", "" )

nuitka1_cmd = "%s --dump-xml %s" % ( nuitka1, filename )

process = subprocess.Popen(
    args   = nuitka1_cmd,
    stdout = subprocess.PIPE,
    stderr = subprocess.PIPE,
    shell  = True
)

stdout_nuitka1, stderr_nuitka1 = process.communicate()
exit_nuitka1 = process.returncode

nuitka2_cmd = "%s --dump-xml %s" % ( nuitka2, filename )

process = subprocess.Popen(
    args   = nuitka2_cmd,
    stdout = subprocess.PIPE,
    stderr = subprocess.PIPE,
    shell  = True
)

stdout_nuitka2, stderr_nuitka2 = process.communicate()
exit_nuitka2 = process.returncode

def makeDiffable( output ):
    result = []

    for line in output.split( b"\n" ):
        line = str( line )


        result.append( line )

    return result

fromdate = None
todate = None

def compareOutput( kind, out1, out2 ):
    diff = difflib.unified_diff(
        makeDiffable( out1 ),
        makeDiffable( out2 ),
        "%s (%s)" % ( "nuitka1 " + filename, kind ),
        "%s (%s)" % ( "nuitka2 " + filename, kind ),
        fromdate,
        todate,
        n=3
    )

    result = list( diff )

    if result:
        for line in result:
            print( line, end = "\n" if not line.startswith( "---" ) else "" )

        return 1
    else:
        return 0

exit_code_stdout = compareOutput( "stdout", stdout_nuitka1, stdout_nuitka2 )
exit_code_return = exit_nuitka1 != exit_nuitka2

if exit_code_return:
    print( "Exit codes %d (%s) != %d (%s)" % ( exit_nuitka1, nuitka1, exit_nuitka2, nuitka2 ) )

exit_code = exit_code_stdout or exit_code_return

if exit_code:
    sys.exit( "Error, outputs differed." )


print( "OK, same outputs." )
