""" msgmerget tool 

Tool specific initialization for `msgmerge` tool.
"""

# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The SCons Foundation
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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__revision__ = "src/engine/SCons/Tool/msgmerge.py  2013/03/03 09:48:35 garyo"

#############################################################################
def _update_or_init_po_files(target, source, env):
  """ Action function for `POUpdate` builder """
  import SCons.Action
  from SCons.Tool.GettextCommon import _init_po_files
  for tgt in target:
    if tgt.rexists():
      action = SCons.Action.Action('$MSGMERGECOM', '$MSGMERGECOMSTR')
    else:
      action = _init_po_files
    status = action([tgt], source, env)
    if status : return status
  return 0
#############################################################################

#############################################################################
def _POUpdateBuilder(env, **kw):
  """ Create an object of `POUpdate` builder """
  import SCons.Action
  from SCons.Tool.GettextCommon import _POFileBuilder
  action = SCons.Action.Action(_update_or_init_po_files, None)
  return _POFileBuilder(env, action=action, target_alias='$POUPDATE_ALIAS')
#############################################################################

#############################################################################
from SCons.Environment import _null
#############################################################################
def _POUpdateBuilderWrapper(env, target=None, source=_null, **kw):
  """ Wrapper for `POUpdate` builder - make user's life easier """
  if source is _null:
    if 'POTDOMAIN' in kw:
      domain = kw['POTDOMAIN']
    elif env.has_key('POTDOMAIN') and env['POTDOMAIN']:
      domain = env['POTDOMAIN']
    else:
      domain = 'messages'
    source = [ domain ] # NOTE: Suffix shall be appended automatically
  return env._POUpdateBuilder(target, source, **kw)
#############################################################################

#############################################################################
def generate(env,**kw):
  """ Generate the `xgettext` tool """
  from SCons.Tool.GettextCommon import _detect_msgmerge
  try:
    env['MSGMERGE'] = _detect_msgmerge(env)
  except:
    env['MSGMERGE'] = 'msgmerge'
  env.SetDefault(
    POTSUFFIX = ['.pot'],
    POSUFFIX = ['.po'],
    MSGMERGECOM = '$MSGMERGE  $MSGMERGEFLAGS --update $TARGET $SOURCE',
    MSGMERGECOMSTR = '',
    MSGMERGEFLAGS = [ ],
    POUPDATE_ALIAS = 'po-update'
  )
  env.Append(BUILDERS = { '_POUpdateBuilder':_POUpdateBuilder(env) })
  env.AddMethod(_POUpdateBuilderWrapper, 'POUpdate')
  env.AlwaysBuild(env.Alias('$POUPDATE_ALIAS'))
#############################################################################

#############################################################################
def exists(env):
  """ Check if the tool exists """
  from SCons.Tool.GettextCommon import _msgmerge_exists
  try:
    return  _msgmerge_exists(env)
  except:
    return False
#############################################################################

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