"""SCons.Tool.Subversion.py

Tool-specific initialization for Subversion.

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.

"""

#
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__revision__ = "src/engine/SCons/Tool/Subversion.py 4369 2009/09/19 15:58:29 scons"

import os.path

import SCons.Action
import SCons.Builder
import SCons.Util

def generate(env):
    """Add a Builder factory function and construction variables for
    Subversion to an Environment."""

    def SubversionFactory(repos, module='', env=env):
        """ """
        # fail if repos is not an absolute path name?
        if module != '':
            module = os.path.join(module, '')
        act = SCons.Action.Action('$SVNCOM', '$SVNCOMSTR')
        return SCons.Builder.Builder(action = act,
                                     env = env,
                                     SVNREPOSITORY = repos,
                                     SVNMODULE = module)

    #setattr(env, 'Subversion', SubversionFactory)
    env.Subversion = SubversionFactory

    env['SVN']      = 'svn'
    env['SVNFLAGS'] = SCons.Util.CLVar('')
    env['SVNCOM']   = '$SVN $SVNFLAGS cat $SVNREPOSITORY/$SVNMODULE$TARGET > $TARGET'

def exists(env):
    return env.Detect('svn')

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