------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                              P R J . P A R T                             --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 2000-2013, Free Software Foundation, Inc.         --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
-- for  more details.  You should have  received  a copy of the GNU General --
-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license.          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

--  Implements the parsing of project files into a tree

with Prj.Tree;  use Prj.Tree;

package Prj.Part is

   type Errout_Mode is
     (Always_Finalize,
      Finalize_If_Error,
      Never_Finalize);
   --  Whether Parse should call Errout.Finalize (which prints the error
   --  messages on stdout). When Never_Finalize is used, Errout is not reset
   --  either at the beginning of Parse.

   procedure Parse
     (In_Tree           : Project_Node_Tree_Ref;
      Project           : out Project_Node_Id;
      Project_File_Name : String;
      Errout_Handling   : Errout_Mode := Always_Finalize;
      Packages_To_Check : String_List_Access;
      Store_Comments    : Boolean := False;
      Current_Directory : String := "";
      Is_Config_File    : Boolean;
      Env               : in out Prj.Tree.Environment;
      Target_Name       : String := "";
      Implicit_Project  : Boolean := False);
   --  Parse project file and all its imported project files and create a tree.
   --  Return the node for the project (or Empty_Node if parsing failed). If
   --  Always_Errout_Finalize is True, Errout.Finalize is called in all cases,
   --  Otherwise, Errout.Finalize is only called if there are errors (but not
   --  if there are only warnings). Packages_To_Check indicates the packages
   --  where any unknown attribute produces an error. For other packages, an
   --  unknown attribute produces a warning. When Store_Comments is True,
   --  comments are stored in the parse tree.
   --
   --  Current_Directory is used for optimization purposes only, avoiding extra
   --  system calls.
   --
   --  Is_Config_File should be set to True if the project represents a config
   --  file (.cgpr) since some specific checks apply.
   --
   --  Target_Name will be used to initialize the default project path, unless
   --  In_Tree.Project_Path has already been initialized (which is the
   --  recommended use).
   --
   --  If Implicit_Project is True, the main project file being parsed is
   --  deemed to be in the current working directory, even if it is not the
   --  case. Implicit_Project is set to True when a tool such as gprbuild is
   --  invoked without a project file and is using an implicit project file
   --  that is virtually in the current working directory, but is physically
   --  in another directory.

end Prj.Part;