"""SCons.Tool.tar

Tool-specific initialization for tar.

There normally shouldn't be any need to import this module directly.
It will usually be imported through the generic SCons.Tool.Tool()
selection method.

"""

#
# Copyright (c) 2001, 2002, 2003, 2004 The SCons Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# 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
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#

__revision__ = "/home/scons/scons/branch.0/baseline/src/engine/SCons/Tool/tar.py 0.96.1.D001 2004/08/23 09:55:29 knight"

import SCons.Builder
import SCons.Node.FS
import SCons.Util

tars = ['tar', 'gtar']

TarBuilder = SCons.Builder.Builder(action = '$TARCOM',
                                   source_factory = SCons.Node.FS.default_fs.Entry,
				   suffix = '$TARSUFFIX',
                                   multi = 1)


def generate(env):
    """Add Builders and construction variables for tar to an Environment."""
    try:
        bld = env['BUILDERS']['Tar']
    except KeyError:
        bld = TarBuilder
        env['BUILDERS']['Tar'] = bld

    env['TAR']        = env.Detect(tars) or 'gtar'
    env['TARFLAGS']   = SCons.Util.CLVar('-c')
    env['TARCOM']     = '$TAR $TARFLAGS -f $TARGET $SOURCES'
    env['TARSUFFIX']  = '.tar'

def exists(env):
    return env.Detect(tars)