#!/usr/bin/env python
#
# MIT License
#
# Copyright The SCons Foundation
#
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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
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
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"""
Verify that we can call add_src_builder() to add a builder to
another on the fly.

This used to trigger infinite recursion (issue 1681) because the
same src_builder list object was being re-used between all Builder
objects that weren't initialized with a separate src_builder.
"""

import TestSCons

test = TestSCons.TestSCons()

test.write('SConstruct', """\
DefaultEnvironment(tools=[])
copy_out = Builder(action = Copy('$TARGET', '$SOURCE'),
                                 suffix = '.out',
                                 src_suffix = '.mid')

copy_mid = Builder(action = Copy('$TARGET', '$SOURCE'),
                                 suffix = '.mid', \
                                 src_suffix = '.in')

env = Environment(tools=[])
env['BUILDERS']['CopyOut'] = copy_out
env['BUILDERS']['CopyMid'] = copy_mid

copy_out.add_src_builder(copy_mid)

env.CopyOut('file1.out', 'file1.in')
""")

test.write('file1.in', "file1.in\n")

test.run()

test.must_match('file1.mid', "file1.in\n")
test.must_match('file1.out', "file1.in\n")

test.pass_test()

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