Merge branch 'feature/upstream' into develop

1 files changed, 355 insertions, 299 deletions

diff --git a/src/engine/SCons/Tool/GettextCommon.py b/src/engine/SCons/Tool/GettextCommon.py
index 596586c..b475d8f 100644
--- a/src/engine/SCons/Tool/GettextCommon.py
+++ b/src/engine/SCons/Tool/GettextCommon.py
@@ -3,7 +3,7 @@
 Used by several tools of `gettext` toolset.
 """
 
-# Copyright (c) 2001 - 2016 The SCons Foundation
+# Copyright (c) 2001 - 2017 The SCons Foundation
 # 
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -24,20 +24,37 @@ Used by several tools of `gettext` toolset.
 # 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__ = "src/engine/SCons/Tool/GettextCommon.py rel_2.5.1:3735:9dc6cee5c168 2016/11/03 14:02:02 bdbaddog"
+__revision__ = "src/engine/SCons/Tool/GettextCommon.py rel_3.0.0:4395:8972f6a2f699 2017/09/18 12:59:24 bdbaddog"
 
 import SCons.Warnings
 import re
 
+
 #############################################################################
 class XgettextToolWarning(SCons.Warnings.Warning): pass
+
+
 class XgettextNotFound(XgettextToolWarning): pass
+
+
 class MsginitToolWarning(SCons.Warnings.Warning): pass
+
+
 class MsginitNotFound(MsginitToolWarning): pass
+
+
 class MsgmergeToolWarning(SCons.Warnings.Warning): pass
+
+
 class MsgmergeNotFound(MsgmergeToolWarning): pass
+
+
 class MsgfmtToolWarning(SCons.Warnings.Warning): pass
+
+
 class MsgfmtNotFound(MsgfmtToolWarning): pass
+
+
 #############################################################################
 SCons.Warnings.enableWarningClass(XgettextToolWarning)
 SCons.Warnings.enableWarningClass(XgettextNotFound)
@@ -47,367 +64,406 @@ SCons.Warnings.enableWarningClass(MsgmergeToolWarning)
 SCons.Warnings.enableWarningClass(MsgmergeNotFound)
 SCons.Warnings.enableWarningClass(MsgfmtToolWarning)
 SCons.Warnings.enableWarningClass(MsgfmtNotFound)
+
+
 #############################################################################
 
 #############################################################################
 class _POTargetFactory(object):
-  """ A factory of `PO` target files.
-  
-  Factory defaults differ from these of `SCons.Node.FS.FS`.  We set `precious`
-  (this is required by builders and actions gettext) and `noclean` flags by
-  default for all produced nodes.
-  """
-  def __init__( self, env, nodefault = True, alias = None, precious = True
-              , noclean = True ):
-    """ Object constructor.
-
-    **Arguments**
-
-        - *env* (`SCons.Environment.Environment`)
-        - *nodefault* (`boolean`) - if `True`, produced nodes will be ignored
-          from default target `'.'`
-        - *alias* (`string`) - if provided, produced nodes will be automatically
-          added to this alias, and alias will be set as `AlwaysBuild`
-        - *precious* (`boolean`) - if `True`, the produced nodes will be set as
-          `Precious`.
-        - *noclen* (`boolean`) - if `True`, the produced nodes will be excluded
-          from `Clean`.
+    """ A factory of `PO` target files.
+    
+    Factory defaults differ from these of `SCons.Node.FS.FS`.  We set `precious`
+    (this is required by builders and actions gettext) and `noclean` flags by
+    default for all produced nodes.
     """
-    self.env = env
-    self.alias = alias
-    self.precious = precious
-    self.noclean = noclean
-    self.nodefault = nodefault
-
-  def _create_node(self, name, factory, directory = None, create = 1):
-    """ Create node, and set it up to factory settings. """
-    import SCons.Util
-    node = factory(name, directory, create)
-    node.set_noclean(self.noclean)
-    node.set_precious(self.precious)
-    if self.nodefault:
-      self.env.Ignore('.', node)
-    if self.alias:
-      self.env.AlwaysBuild(self.env.Alias(self.alias, node))
-    return node
-
-  def Entry(self, name, directory = None, create = 1):
-    """ Create `SCons.Node.FS.Entry` """
-    return self._create_node(name, self.env.fs.Entry, directory, create)
-
-  def File(self, name, directory = None, create = 1):
-    """ Create `SCons.Node.FS.File` """
-    return self._create_node(name, self.env.fs.File, directory, create)
+
+    def __init__(self, env, nodefault=True, alias=None, precious=True
+                 , noclean=True):
+        """ Object constructor.
+    
+        **Arguments**
+    
+            - *env* (`SCons.Environment.Environment`)
+            - *nodefault* (`boolean`) - if `True`, produced nodes will be ignored
+              from default target `'.'`
+            - *alias* (`string`) - if provided, produced nodes will be automatically
+              added to this alias, and alias will be set as `AlwaysBuild`
+            - *precious* (`boolean`) - if `True`, the produced nodes will be set as
+              `Precious`.
+            - *noclen* (`boolean`) - if `True`, the produced nodes will be excluded
+              from `Clean`.
+        """
+        self.env = env
+        self.alias = alias
+        self.precious = precious
+        self.noclean = noclean
+        self.nodefault = nodefault
+
+    def _create_node(self, name, factory, directory=None, create=1):
+        """ Create node, and set it up to factory settings. """
+        import SCons.Util
+        node = factory(name, directory, create)
+        node.set_noclean(self.noclean)
+        node.set_precious(self.precious)
+        if self.nodefault:
+            self.env.Ignore('.', node)
+        if self.alias:
+            self.env.AlwaysBuild(self.env.Alias(self.alias, node))
+        return node
+
+    def Entry(self, name, directory=None, create=1):
+        """ Create `SCons.Node.FS.Entry` """
+        return self._create_node(name, self.env.fs.Entry, directory, create)
+
+    def File(self, name, directory=None, create=1):
+        """ Create `SCons.Node.FS.File` """
+        return self._create_node(name, self.env.fs.File, directory, create)
+
+
 #############################################################################
 
 #############################################################################
 _re_comment = re.compile(r'(#[^\n\r]+)$', re.M)
 _re_lang = re.compile(r'([a-zA-Z0-9_]+)', re.M)
+
+
 #############################################################################
-def _read_linguas_from_files(env, linguas_files = None):
-  """ Parse `LINGUAS` file and return list of extracted languages """
-  import SCons.Util
-  import SCons.Environment
-  global _re_comment
-  global _re_lang
-  if not SCons.Util.is_List(linguas_files) \
-  and not SCons.Util.is_String(linguas_files) \
-  and not isinstance(linguas_files, SCons.Node.FS.Base) \
-  and linguas_files:
-    # If, linguas_files==True or such, then read 'LINGUAS' file.
-    linguas_files = [ 'LINGUAS' ]
-  if linguas_files is None:
-    return []  
-  fnodes = env.arg2nodes(linguas_files)
-  linguas = []
-  for fnode in fnodes:
-    contents =  _re_comment.sub("", fnode.get_text_contents())
-    ls = [ l for l in _re_lang.findall(contents) if l ]
-    linguas.extend(ls)
-  return linguas 
+def _read_linguas_from_files(env, linguas_files=None):
+    """ Parse `LINGUAS` file and return list of extracted languages """
+    import SCons.Util
+    import SCons.Environment
+    global _re_comment
+    global _re_lang
+    if not SCons.Util.is_List(linguas_files) \
+            and not SCons.Util.is_String(linguas_files) \
+            and not isinstance(linguas_files, SCons.Node.FS.Base) \
+            and linguas_files:
+        # If, linguas_files==True or such, then read 'LINGUAS' file.
+        linguas_files = ['LINGUAS']
+    if linguas_files is None:
+        return []
+    fnodes = env.arg2nodes(linguas_files)
+    linguas = []
+    for fnode in fnodes:
+        contents = _re_comment.sub("", fnode.get_text_contents())
+        ls = [l for l in _re_lang.findall(contents) if l]
+        linguas.extend(ls)
+    return linguas
+
+
 #############################################################################
 
 #############################################################################
 from SCons.Builder import BuilderBase
+
+
 #############################################################################
 class _POFileBuilder(BuilderBase):
-  """ `PO` file builder.
-
-  This is multi-target single-source builder. In typical situation the source
-  is single `POT` file, e.g. `messages.pot`, and there are multiple `PO`
-  targets to be updated from this `POT`. We must run
-  `SCons.Builder.BuilderBase._execute()` separatelly for each target to track
-  dependencies separatelly for each target file.
+    """ `PO` file builder.
   
-  **NOTE**: if we call `SCons.Builder.BuilderBase._execute(.., target, ...)`
-  with target being list of all targets, all targets would be rebuilt each time
-  one of the targets from this list is missing. This would happen, for example,
-  when new language `ll` enters `LINGUAS_FILE` (at this moment there is no
-  `ll.po` file yet). To avoid this, we override
-  `SCons.Builder.BuilerBase._execute()` and call it separatelly for each
-  target. Here we also append to the target list the languages read from
-  `LINGUAS_FILE`.
-  """
-  #
-  #* The argument for overriding _execute(): We must use environment with
-  #  builder overrides applied (see BuilderBase.__init__(). Here it comes for
-  #  free.
-  #* The argument against using 'emitter': The emitter is called too late
-  #  by BuilderBase._execute(). If user calls, for example:
-  #  
-  #    env.POUpdate(LINGUAS_FILE = 'LINGUAS')
-  #
-  #  the builder throws error, because it is called with target=None,
-  #  source=None and is trying to "generate" sources or target list first.
-  #  If user calls
-  #
-  #    env.POUpdate(['foo', 'baz'], LINGUAS_FILE = 'LINGUAS')
-  #
-  #  the env.BuilderWrapper() calls our builder with target=None,
-  #  source=['foo', 'baz']. The BuilderBase._execute() then splits execution
-  #  and execute iterativelly (recursion) self._execute(None, source[i]). 
-  #  After that it calls emitter (which is quite too late). The emitter is
-  #  also called in each iteration, what makes things yet worse.
-  def __init__(self, env, **kw):
-    if not 'suffix' in kw:
-       kw['suffix'] = '$POSUFFIX'
-    if not 'src_suffix' in kw:
-       kw['src_suffix'] = '$POTSUFFIX'
-    if not 'src_builder' in kw:
-       kw['src_builder'] = '_POTUpdateBuilder'
-    if not 'single_source' in kw:
-       kw['single_source'] = True
-    alias = None
-    if 'target_alias' in kw:
-       alias = kw['target_alias']
-       del kw['target_alias']
-    if not 'target_factory' in kw:
-       kw['target_factory'] = _POTargetFactory(env, alias=alias).File
-    BuilderBase.__init__(self, **kw)
-
-  def _execute(self, env, target, source, *args, **kw):
-    """ Execute builder's actions.
+    This is multi-target single-source builder. In typical situation the source
+    is single `POT` file, e.g. `messages.pot`, and there are multiple `PO`
+    targets to be updated from this `POT`. We must run
+    `SCons.Builder.BuilderBase._execute()` separatelly for each target to track
+    dependencies separatelly for each target file.
     
-    Here we append to `target` the languages read from `$LINGUAS_FILE` and 
-    apply `SCons.Builder.BuilderBase._execute()` separatelly to each target.
-    The arguments and return value are same as for
-    `SCons.Builder.BuilderBase._execute()`. 
+    **NOTE**: if we call `SCons.Builder.BuilderBase._execute(.., target, ...)`
+    with target being list of all targets, all targets would be rebuilt each time
+    one of the targets from this list is missing. This would happen, for example,
+    when new language `ll` enters `LINGUAS_FILE` (at this moment there is no
+    `ll.po` file yet). To avoid this, we override
+    `SCons.Builder.BuilerBase._execute()` and call it separatelly for each
+    target. Here we also append to the target list the languages read from
+    `LINGUAS_FILE`.
     """
-    import SCons.Util
-    import SCons.Node
-    linguas_files = None
-    if env.has_key('LINGUAS_FILE') and env['LINGUAS_FILE']:
-      linguas_files = env['LINGUAS_FILE']
-      # This prevents endless recursion loop (we'll be invoked once for 
-      # each target appended here, we must not extend the list again).
-      env['LINGUAS_FILE'] = None
-      linguas = _read_linguas_from_files(env,linguas_files)
-      if SCons.Util.is_List(target):
-        target.extend(linguas)
-      elif target is not None:
-        target = [target] + linguas
-      else:
-        target = linguas
-    if not target:
-      # Let the SCons.BuilderBase to handle this patologic situation
-      return BuilderBase._execute( self, env, target, source, *args, **kw)
-    # The rest is ours
-    if not SCons.Util.is_List(target):
-      target = [ target ]
-    result = []
-    for tgt in target:
-      r = BuilderBase._execute( self, env, [tgt], source, *args, **kw)
-      result.extend(r)
-    if linguas_files is not None:
-      env['LINGUAS_FILE'] = linguas_files
-    return SCons.Node.NodeList(result)
+
+    #
+    # * The argument for overriding _execute(): We must use environment with
+    #  builder overrides applied (see BuilderBase.__init__(). Here it comes for
+    #  free.
+    # * The argument against using 'emitter': The emitter is called too late
+    #  by BuilderBase._execute(). If user calls, for example:
+    #
+    #    env.POUpdate(LINGUAS_FILE = 'LINGUAS')
+    #
+    #  the builder throws error, because it is called with target=None,
+    #  source=None and is trying to "generate" sources or target list first.
+    #  If user calls
+    #
+    #    env.POUpdate(['foo', 'baz'], LINGUAS_FILE = 'LINGUAS')
+    #
+    #  the env.BuilderWrapper() calls our builder with target=None,
+    #  source=['foo', 'baz']. The BuilderBase._execute() then splits execution
+    #  and execute iterativelly (recursion) self._execute(None, source[i]).
+    #  After that it calls emitter (which is quite too late). The emitter is
+    #  also called in each iteration, what makes things yet worse.
+    def __init__(self, env, **kw):
+        if not 'suffix' in kw:
+            kw['suffix'] = '$POSUFFIX'
+        if not 'src_suffix' in kw:
+            kw['src_suffix'] = '$POTSUFFIX'
+        if not 'src_builder' in kw:
+            kw['src_builder'] = '_POTUpdateBuilder'
+        if not 'single_source' in kw:
+            kw['single_source'] = True
+        alias = None
+        if 'target_alias' in kw:
+            alias = kw['target_alias']
+            del kw['target_alias']
+        if not 'target_factory' in kw:
+            kw['target_factory'] = _POTargetFactory(env, alias=alias).File
+        BuilderBase.__init__(self, **kw)
+
+    def _execute(self, env, target, source, *args, **kw):
+        """ Execute builder's actions.
+        
+        Here we append to `target` the languages read from `$LINGUAS_FILE` and 
+        apply `SCons.Builder.BuilderBase._execute()` separatelly to each target.
+        The arguments and return value are same as for
+        `SCons.Builder.BuilderBase._execute()`. 
+        """
+        import SCons.Util
+        import SCons.Node
+        linguas_files = None
+        if 'LINGUAS_FILE' in env and env['LINGUAS_FILE']:
+            linguas_files = env['LINGUAS_FILE']
+            # This prevents endless recursion loop (we'll be invoked once for
+            # each target appended here, we must not extend the list again).
+            env['LINGUAS_FILE'] = None
+            linguas = _read_linguas_from_files(env, linguas_files)
+            if SCons.Util.is_List(target):
+                target.extend(linguas)
+            elif target is not None:
+                target = [target] + linguas
+            else:
+                target = linguas
+        if not target:
+            # Let the SCons.BuilderBase to handle this patologic situation
+            return BuilderBase._execute(self, env, target, source, *args, **kw)
+        # The rest is ours
+        if not SCons.Util.is_List(target):
+            target = [target]
+        result = []
+        for tgt in target:
+            r = BuilderBase._execute(self, env, [tgt], source, *args, **kw)
+            result.extend(r)
+        if linguas_files is not None:
+            env['LINGUAS_FILE'] = linguas_files
+        return SCons.Node.NodeList(result)
+
+
 #############################################################################
 
 import SCons.Environment
+
+
 #############################################################################
 def _translate(env, target=None, source=SCons.Environment._null, *args, **kw):
-  """ Function for `Translate()` pseudo-builder """
-  if target is None: target = []
-  pot = env.POTUpdate(None, source, *args, **kw)
-  po = env.POUpdate(target, pot, *args, **kw)
-  return po
+    """ Function for `Translate()` pseudo-builder """
+    if target is None: target = []
+    pot = env.POTUpdate(None, source, *args, **kw)
+    po = env.POUpdate(target, pot, *args, **kw)
+    return po
+
+
 #############################################################################
 
 #############################################################################
 class RPaths(object):
-  """ Callable object, which returns pathnames relative to SCons current
-  working directory.
-
-  It seems like `SCons.Node.FS.Base.get_path()` returns absolute paths
-  for nodes that are outside of current working directory (`env.fs.getcwd()`).
-  Here, we often have `SConscript`, `POT` and `PO` files within `po/`
-  directory and source files (e.g. `*.c`) outside of it. When generating `POT`
-  template file, references to source files are written to `POT` template, so
-  a translator may later quickly jump to appropriate source file and line from
-  its `PO` editor (e.g. `poedit`).  Relative paths in  `PO` file are usually
-  interpreted by `PO` editor as paths relative to the place, where `PO` file
-  lives. The absolute paths would make resultant `POT` file nonportable, as
-  the references would be correct only on the machine, where `POT` file was
-  recently re-created. For such reason, we need a function, which always
-  returns relative paths. This is the purpose of `RPaths` callable object.
-
-  The `__call__` method returns paths relative to current working directory, but
-  we assume, that *xgettext(1)* is run from the directory, where target file is
-  going to be created.
-
-  Note, that this may not work for files distributed over several hosts or
-  across different drives on windows. We assume here, that single local
-  filesystem holds both source files and target `POT` templates.
-
-  Intended use of `RPaths` - in `xgettext.py`::
-
-    def generate(env):
-        from GettextCommon import RPaths
-        ...
-        sources = '$( ${_concat( "", SOURCES, "", __env__, XgettextRPaths, TARGET, SOURCES)} $)'
-        env.Append(
-          ...
-          XGETTEXTCOM = 'XGETTEXT ... ' + sources,
-          ...
-          XgettextRPaths = RPaths(env)
-        )
-  """
-  # NOTE: This callable object returns pathnames of dirs/files relative to
-  # current working directory. The pathname remains relative also for entries
-  # that are outside of current working directory (node, that
-  # SCons.Node.FS.File and siblings return absolute path in such case). For
-  # simplicity we compute path relative to current working directory, this
-  # seems be enough for our purposes (don't need TARGET variable and
-  # SCons.Defaults.Variable_Caller stuff).
+    """ Callable object, which returns pathnames relative to SCons current
+    working directory.
   
-  def __init__(self, env):
-    """ Initialize `RPaths` callable object.
-
-      **Arguments**:
-
-        - *env* - a `SCons.Environment.Environment` object, defines *current
-          working dir*.
+    It seems like `SCons.Node.FS.Base.get_path()` returns absolute paths
+    for nodes that are outside of current working directory (`env.fs.getcwd()`).
+    Here, we often have `SConscript`, `POT` and `PO` files within `po/`
+    directory and source files (e.g. `*.c`) outside of it. When generating `POT`
+    template file, references to source files are written to `POT` template, so
+    a translator may later quickly jump to appropriate source file and line from
+    its `PO` editor (e.g. `poedit`).  Relative paths in  `PO` file are usually
+    interpreted by `PO` editor as paths relative to the place, where `PO` file
+    lives. The absolute paths would make resultant `POT` file nonportable, as
+    the references would be correct only on the machine, where `POT` file was
+    recently re-created. For such reason, we need a function, which always
+    returns relative paths. This is the purpose of `RPaths` callable object.
+  
+    The `__call__` method returns paths relative to current working directory, but
+    we assume, that *xgettext(1)* is run from the directory, where target file is
+    going to be created.
+  
+    Note, that this may not work for files distributed over several hosts or
+    across different drives on windows. We assume here, that single local
+    filesystem holds both source files and target `POT` templates.
+  
+    Intended use of `RPaths` - in `xgettext.py`::
+  
+      def generate(env):
+          from GettextCommon import RPaths
+          ...
+          sources = '$( ${_concat( "", SOURCES, "", __env__, XgettextRPaths, TARGET, SOURCES)} $)'
+          env.Append(
+            ...
+            XGETTEXTCOM = 'XGETTEXT ... ' + sources,
+            ...
+            XgettextRPaths = RPaths(env)
+          )
     """
-    self.env = env
 
-  # FIXME: I'm not sure, how it should be implemented (what the *args are in
-  # general, what is **kw).
-  def __call__(self, nodes, *args, **kw):
-    """ Return nodes' paths (strings) relative to current working directory. 
-    
-      **Arguments**:
+    # NOTE: This callable object returns pathnames of dirs/files relative to
+    # current working directory. The pathname remains relative also for entries
+    # that are outside of current working directory (node, that
+    # SCons.Node.FS.File and siblings return absolute path in such case). For
+    # simplicity we compute path relative to current working directory, this
+    # seems be enough for our purposes (don't need TARGET variable and
+    # SCons.Defaults.Variable_Caller stuff).
 
-        - *nodes* ([`SCons.Node.FS.Base`]) - list of nodes.
-        - *args* -  currently unused.
-        - *kw* - currently unused.
+    def __init__(self, env):
+        """ Initialize `RPaths` callable object.
+    
+          **Arguments**:
+    
+            - *env* - a `SCons.Environment.Environment` object, defines *current
+              working dir*.
+        """
+        self.env = env
+
+    # FIXME: I'm not sure, how it should be implemented (what the *args are in
+    # general, what is **kw).
+    def __call__(self, nodes, *args, **kw):
+        """ Return nodes' paths (strings) relative to current working directory. 
+        
+          **Arguments**:
+    
+            - *nodes* ([`SCons.Node.FS.Base`]) - list of nodes.
+            - *args* -  currently unused.
+            - *kw* - currently unused.
+    
+          **Returns**:
+    
+           - Tuple of strings, which represent paths relative to current working
+             directory (for given environment).
+        """
+        import os
+        import SCons.Node.FS
+        rpaths = ()
+        cwd = self.env.fs.getcwd().get_abspath()
+        for node in nodes:
+            rpath = None
+            if isinstance(node, SCons.Node.FS.Base):
+                rpath = os.path.relpath(node.get_abspath(), cwd)
+            # FIXME: Other types possible here?
+            if rpath is not None:
+                rpaths += (rpath,)
+        return rpaths
 
-      **Returns**:
 
-       - Tuple of strings, which represent paths relative to current working
-         directory (for given environment).
-    """
-    import os 
-    import SCons.Node.FS
-    rpaths = ()
-    cwd =  self.env.fs.getcwd().get_abspath()
-    for node in nodes:
-      rpath = None
-      if isinstance(node, SCons.Node.FS.Base):
-        rpath = os.path.relpath(node.get_abspath(), cwd)
-      # FIXME: Other types possible here?
-      if rpath is not None:
-        rpaths += (rpath,)
-    return rpaths
 #############################################################################
-   
+
 #############################################################################
 def _init_po_files(target, source, env):
-  """ Action function for `POInit` builder. """
-  nop = lambda target, source, env : 0
-  if env.has_key('POAUTOINIT'):
-    autoinit = env['POAUTOINIT']
-  else:
-    autoinit = False
-  # Well, if everything outside works well, this loop should do single
-  # iteration. Otherwise we are rebuilding all the targets even, if just
-  # one has changed (but is this our fault?).
-  for tgt in target:
-    if not tgt.exists():
-      if autoinit:
-        action = SCons.Action.Action('$MSGINITCOM', '$MSGINITCOMSTR')
-      else:
-        msg = 'File ' + repr(str(tgt)) + ' does not exist. ' \
-            + 'If you are a translator, you can create it through: \n' \
-            + '$MSGINITCOM'
-        action = SCons.Action.Action(nop, msg)
-      status = action([tgt], source, env)
-      if status: return status
-  return 0
+    """ Action function for `POInit` builder. """
+    nop = lambda target, source, env: 0
+    if 'POAUTOINIT' in env:
+        autoinit = env['POAUTOINIT']
+    else:
+        autoinit = False
+    # Well, if everything outside works well, this loop should do single
+    # iteration. Otherwise we are rebuilding all the targets even, if just
+    # one has changed (but is this our fault?).
+    for tgt in target:
+        if not tgt.exists():
+            if autoinit:
+                action = SCons.Action.Action('$MSGINITCOM', '$MSGINITCOMSTR')
+            else:
+                msg = 'File ' + repr(str(tgt)) + ' does not exist. ' \
+                      + 'If you are a translator, you can create it through: \n' \
+                      + '$MSGINITCOM'
+                action = SCons.Action.Action(nop, msg)
+            status = action([tgt], source, env)
+            if status: return status
+    return 0
+
+
 #############################################################################
 
 #############################################################################
 def _detect_xgettext(env):
-  """ Detects *xgettext(1)* binary """
-  if env.has_key('XGETTEXT'):
-    return env['XGETTEXT']
-  xgettext = env.Detect('xgettext');
-  if xgettext:
-    return xgettext
-  raise SCons.Errors.StopError(XgettextNotFound,"Could not detect xgettext")
-  return None
+    """ Detects *xgettext(1)* binary """
+    if 'XGETTEXT' in env:
+        return env['XGETTEXT']
+    xgettext = env.Detect('xgettext');
+    if xgettext:
+        return xgettext
+    raise SCons.Errors.StopError(XgettextNotFound, "Could not detect xgettext")
+    return None
+
+
 #############################################################################
 def _xgettext_exists(env):
-  return _detect_xgettext(env)
+    return _detect_xgettext(env)
+
+
 #############################################################################
 
 #############################################################################
 def _detect_msginit(env):
-  """ Detects *msginit(1)* program. """
-  if env.has_key('MSGINIT'):
-    return env['MSGINIT']
-  msginit = env.Detect('msginit');
-  if msginit:
-    return msginit
-  raise SCons.Errors.StopError(MsginitNotFound, "Could not detect msginit")
-  return None
+    """ Detects *msginit(1)* program. """
+    if 'MSGINIT' in env:
+        return env['MSGINIT']
+    msginit = env.Detect('msginit');
+    if msginit:
+        return msginit
+    raise SCons.Errors.StopError(MsginitNotFound, "Could not detect msginit")
+    return None
+
+
 #############################################################################
 def _msginit_exists(env):
-  return  _detect_msginit(env)
+    return _detect_msginit(env)
+
+
 #############################################################################
 
 #############################################################################
 def _detect_msgmerge(env):
-  """ Detects *msgmerge(1)* program. """
-  if env.has_key('MSGMERGE'):
-    return env['MSGMERGE']
-  msgmerge = env.Detect('msgmerge');
-  if msgmerge:
-    return msgmerge
-  raise SCons.Errors.StopError(MsgmergeNotFound, "Could not detect msgmerge")
-  return None
+    """ Detects *msgmerge(1)* program. """
+    if 'MSGMERGE' in env:
+        return env['MSGMERGE']
+    msgmerge = env.Detect('msgmerge');
+    if msgmerge:
+        return msgmerge
+    raise SCons.Errors.StopError(MsgmergeNotFound, "Could not detect msgmerge")
+    return None
+
+
 #############################################################################
 def _msgmerge_exists(env):
-  return  _detect_msgmerge(env)
+    return _detect_msgmerge(env)
+
+
 #############################################################################
 
 #############################################################################
 def _detect_msgfmt(env):
-  """ Detects *msgmfmt(1)* program. """
-  if env.has_key('MSGFMT'):
-    return env['MSGFMT']
-  msgfmt = env.Detect('msgfmt');
-  if msgfmt:
-    return msgfmt
-  raise SCons.Errors.StopError(MsgfmtNotFound, "Could not detect msgfmt")
-  return None
+    """ Detects *msgmfmt(1)* program. """
+    if 'MSGFMT' in env:
+        return env['MSGFMT']
+    msgfmt = env.Detect('msgfmt');
+    if msgfmt:
+        return msgfmt
+    raise SCons.Errors.StopError(MsgfmtNotFound, "Could not detect msgfmt")
+    return None
+
+
 #############################################################################
 def _msgfmt_exists(env):
-  return _detect_msgfmt(env)
+    return _detect_msgfmt(env)
+
+
 #############################################################################
 
 #############################################################################
 def tool_list(platform, env):
-  """ List tools that shall be generated by top-level `gettext` tool """
-  return [ 'xgettext', 'msginit', 'msgmerge', 'msgfmt' ]
-#############################################################################
+    """ List tools that shall be generated by top-level `gettext` tool """
+    return ['xgettext', 'msginit', 'msgmerge', 'msgfmt']
 
+#############################################################################