ocarina_cmd.adb 33.1 KB
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------------------------------------------------------------------------------
--                                                                          --
--                           OCARINA COMPONENTS                             --
--                                                                          --
--                          O C A R I N A _ C M D                           --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
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--    Copyright (C) 2004-2009 Telecom ParisTech, 2010-2013 ESA & ISAE.      --
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--                                                                          --
-- Ocarina  is free software;  you  can  redistribute  it and/or  modify    --
-- it under terms of the GNU General Public License as published by the     --
-- Free Software Foundation; either version 2, or (at your option) any      --
-- later version. Ocarina is distributed  in  the  hope  that it will be    --
-- useful, but WITHOUT 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 Ocarina; see file COPYING.   --
-- If not, write to the Free Software Foundation, 51 Franklin Street, Fifth --
-- Floor, Boston, MA 02111-1301, USA.                                       --
--                                                                          --
-- As a special exception,  if other files  instantiate  generics from this --
-- unit, or you link  this unit with other files  to produce an executable, --
-- this  unit  does not  by itself cause  the resulting  executable to be   --
-- covered  by the  GNU  General  Public  License. This exception does not  --
-- however invalidate  any other reasons why the executable file might be   --
-- covered by the GNU Public License.                                       --
--                                                                          --
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--                 Ocarina is maintained by the TASTE project               --
--                      (taste-users@lists.tuxfamily.org)                   --
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--                                                                          --
------------------------------------------------------------------------------

--  This program is used to drive Ocarina, it is a wrapper to all
--  functions provided by the library.

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with Errors;    use Errors;
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with Locations; use Locations;
with Namet;     use Namet;
with Output;    use Output;
with Types;     use Types;
with Utils;     use Utils;

with Ada.Command_Line; use Ada.Command_Line;
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with Ada.Command_Line.Response_File;
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with Ada.Text_IO;

with GNAT.Command_Line;         use GNAT.Command_Line;
with GNAT.Directory_Operations; use GNAT.Directory_Operations;
with GNAT.OS_Lib;               use GNAT.OS_Lib;

with Ocarina;                          use Ocarina;
with Ocarina.AADL_Values;              use Ocarina.AADL_Values;
with Ocarina.Analyzer;                 use Ocarina.Analyzer;
with Ocarina.Backends;                 use Ocarina.Backends;
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with Ocarina.Backends.PO_HI_C;
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with Ocarina.Backends.PO_HI_Ada;
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with Ocarina.Backends.Execution_Tests; use Ocarina.Backends.Execution_Tests;
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with Ocarina.Configuration;            use Ocarina.Configuration;
with Ocarina.Files;                    use Ocarina.Files;
with Ocarina.Instances;                use Ocarina.Instances;
with Ocarina.Instances.Queries;        use Ocarina.Instances.Queries;
with Ocarina.ME_AADL.AADL_Tree.Nodes;  use Ocarina.ME_AADL.AADL_Tree.Nodes;
with Ocarina.ME_AADL.AADL_Tree.Nutils; use Ocarina.ME_AADL.AADL_Tree.Nutils;
with Ocarina.Options;                  use Ocarina.Options;
with Ocarina.Parser;                   use Ocarina.Parser;
with Ocarina.Property_Sets;            use Ocarina.Property_Sets;
with Ocarina.FE_AADL.Parser;           use Ocarina.FE_AADL.Parser;
with Ocarina.ME_REAL.Tokens;
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with Ocarina.Scripts;                  use Ocarina.Scripts;
with Ocarina.Utils;                    use Ocarina.Utils;
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--  with Ocarina.Python;                   use Ocarina.Python;
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with Ocarina.ME_AADL.AADL_Instances.Nodes;

procedure Ocarina_Cmd is

   procedure Process_Command_Line
     (Root_System_Name  : out Name_Id;
      Success           : out Boolean);
   --  Process the command line to extract the options for the
   --  different modules of Ocarina.

   procedure Run_Command
     (Command_Name  :     String;
      Argument_List :     GNAT.OS_Lib.Argument_List;
      Success       : out Boolean);

   procedure Parse_Scenario_Files;
   --  Parse a set of scenario file and updates the global variable
   --  according to the extracted information.

   After_Scenario_Action : Action_Kind := Generate_Code;
   AADL_Root             : Node_Id := No_Node;
   Success               : Boolean := True;
   File_Name             : Name_Id;
   Buffer                : Location;
   Language              : Name_Id;
   Position              : String_String_Maps.Cursor;

   -----------------
   -- Run_Command --
   -----------------

   procedure Run_Command
     (Command_Name  :     String;
      Argument_List :     GNAT.OS_Lib.Argument_List;
      Success       : out Boolean)
   is
      Path         : GNAT.OS_Lib.String_Access := Getenv ("PATH");
      Command_Path : GNAT.OS_Lib.String_Access := Locate_Exec_On_Path
        (Command_Name);
      Pid          : Process_Id;
      Out_Pid      : Process_Id := Invalid_Pid;
   begin
      --  First off, we put the 'bin' directory of the Ocarina
      --  installation at the top of the PATH envvironment variable.

      Get_Name_String (Installation_Directory);
      Add_Str_To_Name_Buffer ("bin");
      Add_Char_To_Name_Buffer (Path_Separator);
      Add_Str_To_Name_Buffer (Path.all);
      Setenv ("PATH", Name_Buffer (1 .. Name_Len));

      Free (Path);
      Path := Getenv ("PATH");

      --  Some debugging stuff

      pragma Debug (Write_Line ("Executing command:"));
      pragma Debug (Write_Line (" Name: " & Command_Name));
      pragma Debug (Write_Str  (" Args: "));
      for J in Argument_List'Range loop
         pragma Debug (Write_Str ("'" & Argument_List (J).all & "' "));
         null;
      end loop;
      pragma Debug (Write_Eol);
      pragma Debug (Write_Line ("Current directory: " & Get_Current_Dir));
      pragma Debug (Write_Line ("PATH=" & Path.all));

      Exit_On_Error (Command_Path = null, Command_Name & ": not found!");

      Pid := Non_Blocking_Spawn
        (Program_Name => Command_Path.all,
         Args         => Argument_List);

      --  Wait until the command achieves its execution

      while Out_Pid /= Pid loop
         Wait_Process (Out_Pid, Success);
         exit when Out_Pid = Pid or else Out_Pid = Invalid_Pid;
      end loop;

      if Out_Pid = Pid then
         if not Success then
            pragma Debug (Write_Line (Command_Path.all
                                      & " terminated unexpectedly"));
            null;
         end if;
      end if;

      Free (Path);
      Free (Command_Path);
   end Run_Command;

   -------------------------
   -- Parse_Scenario_File --
   -------------------------

   --  Example of an AADL scenario:

   --  -----------------
   --  -- FILE_1.aadl --
   --  -----------------

   --  system RMA
   --  properties
   --    Ocarina_Config::AADL_Files => ("rma.aadl");
   --    --  "rma.aadl" contains common AADL components (processes,
   --    --  threads, data types)
   --
   --    Ocarina_Config::Needed_Property_Sets =>
   --      (value (Ocarina_Config::ARAO),
   --       value (Ocarina_Config::Cheddar_Properties));
   --    --  The non standard predefined property sets needed by the
   --    --  application.
   --  end RMA;

   --  -----------------
   --  -- FILE_2.aadl --
   --  -----------------

   --  system implementation RMA.Impl_C
   --  properties
   --    Ocarina_Config::AADL_Files +=> ("software_c.aadl");
   --    --  Note that this is an additive property
   --    --  association.
   --
   --    Ocarina_Config::Generator => PolyORB_HI_C;
   --    --  The code generator
   --  end RMA.Impl_C;

   --  -----------------
   --  -- FILE_3.aadl --
   --  -----------------

   --  system implementation RMA.Impl_Ada
   --  properties
   --    Source_Text +=> ("software_ada.aadl");
   --    --  Note that this is an additive property
   --    --  association.
   --
   --    Ocarina_Config::Generator => PolyORB_HI_Ada;
   --    --  The code generator
   --  end RMA.Impl_Ada;

   --  Calling the compiler on FILE_1.aadl and FILE_2.aadl will
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   --  generate C code for the PolyORB-HI framework starting from
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   --  "rma.aadl" and "software_c.aadl".

   --  Calling the compiler on FILE_1.aadl and FILE_3.aadl will
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   --  generate Ada code for the PolyORB-HI framework starting from
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   --  "rma.aadl" and "software_ada.aadl".

   procedure Parse_Scenario_Files is
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      AADL_Root               : Node_Id := No_Node;
      Instance_Root           : Node_Id := No_Node;
      Root_System             : Node_Id := No_Node;
      Source_Files            : List_Id;
      Ref_Files               : List_Id;
      Needed_PS               : List_Id;
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      Use_CL                  : Boolean := False;
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      Used_Generator_Options  : List_Id;
      Dirname                 : Name_Id;
      Success                 : Boolean := False;
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      The_Backend : Name_Id := No_Name;
      --  The current code generator

      Current_Scenario_Dirname : Name_Id := No_Name;
      --  The current dirname of all the scenario files.

      AADL_Version_Name : Name_Id := No_Name;
      --  The AADL version under which the model will be parsed

      Temp_AADL_Version : AADL_Version_Type;

      Ocarina_Config : constant String := "ocarina_config";
      --  The property set containing the Ocarina configuration
      --  properties.

      AADL_Files    : constant Name_Id
        := Get_String_Name (Ocarina_Config & "::aadl_files");
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      Use_Components_Library : constant Name_Id
        := Get_String_Name (Ocarina_Config & "::use_components_library");
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      Referencial_Files    : constant Name_Id
        := Get_String_Name (Ocarina_Config & "::referencial_files");
      The_Generator : constant Name_Id
        := Get_String_Name (Ocarina_Config & "::generator");
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      Generator_Options : constant Name_Id
        := Get_String_Name (Ocarina_Config & "::generator_options");
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      Predefined_PS : constant Name_Id
        := Get_String_Name
        (Ocarina_Config & "::needed_property_sets");
      RS_Name       : constant Name_Id
        := Get_String_Name (Ocarina_Config & "::root_system_name");
      AADL_Version  : constant Name_Id
        := Get_String_Name (Ocarina_Config & "::aadl_version");
      Timeout_Property     : constant Name_Id
        := Get_String_Name (Ocarina_Config & "::timeout_property");

      -------------------------------
      -- Extract_Referencial_Files --
      -------------------------------

      procedure Extract_Referencial_Files
        (Ref_Files : List_Id;
                  Ref_Map   : in out String_String_Maps.Map)
      is
                  N : Node_Id;
      begin
         if not Is_Empty (Ref_Files) then
            N := First_Node (Ref_Files);
            while Present (N) loop
               declare
                  App_Name : constant String
                    := Image (Value (N), Quoted => False);
               begin
                  N := Next_Node (N);
                  if Present (N) then
                     declare
                        File : constant String
                          := Image (Value (N), Quoted => False);
                     begin
                        Write_Line ("Inserting : " & App_Name & " / " & File);
                        String_String_Maps.Insert (Container => Ref_Map,
                                                   Key => App_Name,
                                                   New_Item => File,
                                                   Position => Position,
                                                   Inserted => Success);
                     end;
                  else
                     Exit_On_Error (True, "Missing parameters in "
                                      & "Referencial_Files property");
                  end if;
                  N := Next_Node (N);
               end;
            end loop;
         end if;
      end Extract_Referencial_Files;

      --------------------------
      -- Extract_Source_Files --
      --------------------------

      procedure Extract_Source_Files
        (Source_Files : List_Id;
         Needed_PS    : List_Id);
      --  FIXME : Update the sources with the full path of the given AADL
      --  source file list and the needed predefined property sets (???).

      procedure Extract_Source_Files
        (Source_Files : List_Id;
         Needed_PS    : List_Id)
      is
         N : Node_Id;

      begin
         if not Is_Empty (Needed_PS) then
            N := First_Node (Needed_Ps);

            while Present (N) loop
               declare
                  P         : Name_Id;
                  File_Name : constant String
                    := Image (Value (N), Quoted => False);
               begin
                  Set_Str_To_Name_Buffer (File_Name);
                  Set_Str_To_Name_Buffer
                    (Image
                       (Ocarina_Property_Set_Type'Value
                        ("O_" & Name_Buffer (1 .. Name_Len))));
                  P := Name_Find;

                  Get_Name_String (Default_Library_Path);
                  Get_Name_String_And_Append (P);
                  Add_Str_To_Name_Buffer (".aadl");

               exception
                  when others =>
                     --  If we fail here, this means that the user gave a
                     --  custom property set file, assume that this file
                     --  is located in the data directory.

                     --  Build the full-path file name
                     Get_Name_String (Default_Library_Path);
                     Add_Str_To_Name_Buffer (File_Name & ".aadl");
               end;

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               Ocarina.Files.Add_File_To_Parse_List (Name_Find);
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               N := Next_Node (N);
            end loop;
         end if;
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         N := First_Node (Source_Files);
         while Present (N) loop
            declare
               File_Name : constant String
                 := Image (Value (N), Quoted => False);
            begin
               Get_Name_String (Current_Scenario_Dirname);
               Add_Str_To_Name_Buffer (File_Name);
               Ocarina.Files.Add_File_To_Parse_List (Name_Find);
               N := Next_Node (N);
            end;
         end loop;
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      end Extract_Source_Files;

      package OIQ renames Ocarina.Instances.Queries;

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      F : Types.Int;
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      N : Node_Id;
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   begin
      Current_Scenario_Dirname := No_Name;

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      AADL_Root := Process_Predefined_Property_Sets (AADL_Root);

      F := Sources.First;

      loop
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         Dirname := Get_String_Name
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           (Dir_Name (Normalize_Pathname
                        (Get_Name_String (Sources.Table (F)))));
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         if Current_Scenario_Dirname = No_Name then
            Current_Scenario_Dirname := Dirname;
            Scenario_Dir := new String'(Get_Name_String
                                          (Current_Scenario_Dirname));
         end if;

         --  All scenario files have to be located in the same directory

         Exit_On_Error
           (Current_Scenario_Dirname /= Dirname,
            "Cannot locate scenario files in the directory");
         File_Name := Search_File (Sources.Table (F));
         Exit_On_Error
           ((File_Name = No_Name),
            "Cannot find file " & Get_Name_String (Sources.Table (F)));
         Buffer := Load_File (File_Name);
         Exit_On_Error
           ((File_Name = No_Name),
            "Cannot read file " & Get_Name_String (Sources.Table (F)));
         AADL_Root := Parse (Language, AADL_Root, Buffer);
         Exit_On_Error
           (No (AADL_Root),
            "Cannot parse AADL specifications");

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         exit when F = Sources.Last; -- XXX Sources.Last may be modified
         F := F + 1;
      end loop;
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      --  Analyze the AADL tree

      Success := Analyze (Language, AADL_Root);
      Exit_On_Error (not Success, "Cannot analyze AADL scenarios");

      --  Instantiate the AADL tree

      Instance_Root := Instantiate_Model (AADL_Root);
      Exit_On_Error (No (Instance_Root), "Cannot instantiate AADL scenarios");

      --  Every thing is fine, extract the information from the
      --  scenario model.

      Root_System := Ocarina.ME_AADL.AADL_Instances.Nodes.Root_System
        (Instance_Root);

      --  Extract the generator

      Exit_On_Error
        (not Is_Defined_Enumeration_Property (Root_System, The_Generator),
         "You must specify a code generator");

      The_Backend := Get_Enumeration_Property (Root_System, The_Generator);

      --  Extract the AADL files to be parsed

      Exit_On_Error
        (not Is_Defined_List_Property (Root_System, AADL_Files),
         "AADL source files have to be specified by"
           & " means of the standard property"
           & " ""Source_Text""");

      Source_Files := Get_List_Property (Root_System, AADL_Files);

      --  Extract the referencial files for regression tests

      if Is_Defined_List_Property (Root_System, Referencial_Files) then
         Ref_Files := Get_List_Property (Root_System, Referencial_Files);
      else
         Ref_Files := No_List;
      end if;

      --  Extract the timeout used to stop the test

      if OIQ.Is_Defined_Integer_Property (Root_System, Timeout_Property) then
         Timeout := OIQ.Get_Integer_Property (Root_System, Timeout_Property);
      end if;

      --  Extract the predefined property sets needed by the
      --  application

      if Is_Defined_List_Property (Root_System, Predefined_PS) then
         Needed_PS := Get_List_Property (Root_System, Predefined_PS);
      else
         Needed_PS := No_List;
      end if;

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      if Is_Defined_Boolean_Property
         (Root_System, Use_Components_Library) then
         Use_CL := True;
      else
         Use_CL := False;
      end if;

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      --  Extract the generator options.

      if Is_Defined_List_Property (Root_System, Generator_Options) then
         Used_Generator_Options
            := Get_List_Property (Root_System, Generator_Options);
      else
         Used_Generator_Options := No_List;
      end if;

      --  Process options.

      if not Is_Empty (Used_Generator_Options) then
         N := First_Node (Used_Generator_Options);

         while Present (N) loop
            declare
               P         : Name_Id;
               Option : constant String
                 := Image (Value (N), Quoted => False);
            begin

               Set_Str_To_Name_Buffer (Option);
               P := Name_Find;

               if P = Get_String_Name ("gprof") then
                  Ocarina.Backends.PO_HI_C.Set_Performance_Analysis (True);
               end if;

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               if P = Get_String_Name ("asn1") then
                  Ocarina.Backends.PO_HI_C.Set_ASN1_Deployment (True);
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                  Ocarina.Backends.PO_HI_Ada.Set_ASN1_Deployment (True);
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               end if;

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               N := Next_Node (N);
            end;
         end loop;
      end if;

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      --  Extract the AADL version

      if Is_Defined_Enumeration_Property (Root_System, AADL_Version) then
         AADL_Version_Name := Get_Enumeration_Property
           (Root_System, AADL_Version);

         if Get_Name_String (AADL_Version_Name) = "aadlv1" then
            Temp_AADL_Version := Ocarina.AADL_V1;
         elsif Get_Name_String (AADL_Version_Name) = "aadlv2" then
            Temp_AADL_Version := Ocarina.AADL_V2;
         else
            raise Program_Error;
         end if;
      else
         Temp_AADL_Version := Ocarina.AADL_V1;
      end if;

      Ocarina.AADL_Version := Temp_AADL_Version;

      Sources.Free;
      Sources.Init;
      Extract_Source_Files (Source_Files, Needed_PS);

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      if Use_CL then
         Set_Str_To_Name_Buffer ("ocarina_components.aadl");
         Ocarina.Files.Add_File_To_Parse_List (Name_Find);
         Set_Str_To_Name_Buffer ("base_types.aadl");
         Ocarina.Files.Add_File_To_Parse_List (Name_Find);
      end if;

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      Extract_Referencial_Files (Ref_Files, Ref_Map);

      --  Extract the name of the root of the instance tree

      if Is_Defined_String_Property (Root_System, RS_Name) then
         Root_System_Name := Get_String_Property (Root_System, RS_Name);
      end if;

      --  Reset Ocarina to have a clean set up for the next step

      declare
         The_Backend_Name     : constant String :=
           Get_Name_String (The_Backend);
         Result               : Argument_List_Access :=
           new Argument_List
           (Integer (Sources.First) .. Integer (Sources.Last));
         Root_System_Name_Ptr : String_Access;
      begin
         if Root_System_Name /= No_Name then
            Root_System_Name_Ptr :=
              new String'(Get_Name_String (Root_System_Name));
         else
            Root_System_Name_Ptr := new String'("");
         end if;

         for J in Sources.First .. Sources.Last loop
            Result (Integer (J)) :=
              new String'(Get_Name_String (Sources.Table (J)));
         end loop;

         Ocarina.Configuration.Reset_Modules;
         Ocarina.Reset;
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         --         Ocarina.Files.Sources.Init;
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         Ocarina.Initialize;
         Language := Get_String_Name ("aadl");
         Ocarina.AADL_Version := Temp_AADL_Version;
         Set_Current_Backend_Name (The_Backend_Name);

         Ocarina.Configuration.Init_Modules;
         Sources.Free;
         Sources.Init;

         --  Restore the root system name

         if Root_System_Name_Ptr.all /= "" then
            Set_Str_To_Name_Buffer (Root_System_Name_Ptr.all);
            Root_System_Name := Name_Find;
         else
            Root_System_Name := No_Name;
         end if;

         for J in Result'Range loop
            Set_Str_To_Name_Buffer (Result (J).all);
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            Ocarina.Files.Add_File_To_Parse_List (Name_Find);
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         end loop;

         --  Avoid memory leaks

         Free (Result);
         Free (Root_System_Name_Ptr);
      end;
   end Parse_Scenario_Files;

   --------------------------
   -- Process_Command_Line --
   --------------------------

   procedure Process_Command_Line
     (Root_System_Name  : out Name_Id;
      Success           : out Boolean) is
   begin
      Root_System_Name := No_Name;
      Success          := True;

      Initialize_Option_Scan;
      loop
         case Getopt ("* aadlv1 aadlv2 help o: c d g: "
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                        & "r: real_lib: real_theorem: boundt_process: "
                        & "disable-annexes=: "
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                        & "i p q v V s x t? w") is
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            when 'w' =>
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               Set_Current_Action (Python_Shell);
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            when 'a' =>
               if Full_Switch = "aadlv2" then
                  AADL_Version := AADL_V2;
               elsif Full_Switch = "aadlv1" then
                  AADL_Version := AADL_V1;
               else
                  raise Invalid_Switch;
               end if;

            when 'c' =>
               After_Scenario_Action := Analyze_With_Cheddar;

            when 'o' =>
               declare
                  D : constant String := Parameter;
               begin
                  if D'Length > 0 then
                     Output_Filename := Get_String_Name (D);
                  end if;
               end;

            when 'g' =>
               Set_Current_Action (Generate_Code);
               declare
                  G : constant String := Parameter;
               begin
                  if G'Length > 0 then
                     Set_Current_Backend_Name (G);
                  end if;
               end;

            when 'h' =>
               if Full_Switch /= "help" then
                  raise Invalid_Switch;
               end if;
               Set_Current_Action (Show_Help);

            when 'p' =>
               if Full_Switch = "p" then
                  After_Scenario_Action := Instantiate_Model;
               end if;

            when 'r' =>
               if Full_Switch = "r" then
                  declare
                     N : constant String := Parameter;
                  begin
                     if N'Length > 0 then
                        Root_System_Name := To_Lower (Get_String_Name (N));
                     end if;
                  end;
               end if;

            when 'i' =>
               Set_Current_Action (Instantiate_Model);

            when 'q' =>
               Quiet_Mode   := True;
               Verbose_Mode := False;

            when 'v' =>
               Quiet_Mode   := False;
               Verbose_Mode := True;

            when 'd' =>
               if Full_Switch = "disable-annexes=" then
                  Reset_Annex_Action;
                  Process_Annex_Action (Parameter);
               else
                  Debug_Mode := True;
               end if;

            when 'V' =>
               Set_Current_Action (Show_Version);
               exit;

            when 's' =>
               Set_Current_Action (Show_Libraries);

               --  Note: we continue parsing the command line
               --  parameters to know whether the user specified also
               --  an AADL version flag.

            when 'x' =>
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               Use_Scenario_File := True;
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               Set_Current_Action (Parse_Scenario_Files_First);

            when 't' =>
               Set_Current_Action (Shell);
               declare
                  N : constant String := Get_Argument;
                  File : Ada.Text_IO.File_Type;
               begin
                  if N'Length > 0 then
                     Ada.Text_IO.Open (File, Ada.Text_IO.In_File, N);
                     Ada.Text_IO.Set_Input (File);
                     Standard_Input := False;
                  end if;
               end;

               exit;

            when ASCII.NUL =>
               exit;

            when others =>
               declare
                  S : constant String := Full_Switch;
               begin
                  --  FIXME: this is not correct. For instance, an
                  --  unknown switch may be followed by a parameter.
                  --  The parameter is considered as a file to parse
                  --  when it is not. Only sections would fix the
                  --  issue.

                  --  If there is a new switch, then the previous
                  --  files must be discarded.

                  if S (S'First) = '-' then
                     Sources.Init;

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                  elsif S (S'First) = '@' then
                     declare
                        Files : constant
                          Ada.Command_Line.Response_File.Argument_List :=
                          Ada.Command_Line.Response_File.Arguments_From
                          (S (S'First + 1 .. S'Last));
                     begin
                        for J in Files'Range loop
                           Set_Str_To_Name_Buffer (Files (J).all);
                           Ocarina.Files.Add_File_To_Parse_List
                             (Name_Find, Add_Suffix => False);
                        end loop;
                        --  Free (Files);
                     end;

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                  else
                     Set_Str_To_Name_Buffer (S);
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                     Ocarina.Files.Add_File_To_Parse_List
                      (Name_Find, Add_Suffix => False);
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                  end if;
               end;
         end case;
      end loop;

      --  If no file is given, print the usage function and exit

      if Sources.Last = 0
        and then Get_Current_Action /= Show_Version
        and then Get_Current_Action /= Show_Libraries
        and then Get_Current_Action /= Show_Help
        and then Get_Current_Action /= Shell
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        and then Get_Current_Action /= Parse_Scenario_Files_First
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        and then Get_Current_Action /= Python_Shell
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      then
         Set_Current_Action (Show_Usage);

      elsif Sources.Last /= 0
        and then Get_Current_Action = None
      then
         Set_Current_Action (Analyze_Model);
      end if;

   exception
      when Invalid_Options =>
         Write_Line (Base_Name (Command_Name)
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                       & ": invalid combination of options");
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         Write_Eol;
         OS_Exit (1);

      when GNAT.Command_Line.Invalid_Switch =>
         Write_Line (Base_Name (Command_Name)
                     & ": invalid switch "
                     & Full_Switch
                     & Parameter);
         Write_Eol;
         OS_Exit (1);

      when GNAT.Command_Line.Invalid_Parameter =>
         Write_Line (Base_Name (Command_Name)
                     & ": invalid parameter for switch -"
                     & Full_Switch);
         Write_Eol;
         OS_Exit (1);
   end Process_Command_Line;

   package RT renames Ocarina.ME_REAL.Tokens;
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begin
   --  Init

   Ocarina.Initialize;
   Language := Get_String_Name ("aadl");
   Default_AADL_Version := Get_Default_AADL_Version;
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   AADL_Version         := Ocarina.AADL_V2;
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   --  Process the command line

   Process_Command_Line
     (Root_System_Name,
      Success);
   Exit_On_Error (not Success, "Cannot process command line");

   --  Initialization Modules

   Ocarina.Configuration.Init_Modules;

   case Get_Current_Action is
      when Show_Version =>
         Version;
         OS_Exit (0);

      when Show_Help =>
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         Ocarina.Utils.Usage;
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         OS_Exit (0);

      when Show_Libraries =>
         Write_Line (Get_Name_String (Default_Library_Path));
         OS_Exit (0);

      when Show_Usage =>
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         Ocarina.Utils.Usage;
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         OS_Exit (1);

      when Shell =>
         Ocarina_Shell;
         OS_Exit (0);

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      when Python_Shell =>
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         --         Run_Python;
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         OS_Exit (0);

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      when Parse_Scenario_Files_First =>
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         AADL_Version         := Ocarina.AADL_V1;
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         Parse_Scenario_Files;
         Reset_Current_Action;
         Set_Current_Action (After_Scenario_Action);
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      when others =>
         null;
   end case;

   if Get_Current_Action /= Analyze_With_Cheddar then
      --  Parse the AADL files

      AADL_Root := No_Node;
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      declare
         F : Types.Int := Sources.First;
      begin
         loop
            File_Name := Search_File (Sources.Table (F));
            Exit_On_Error
              ((File_Name = No_Name),
               "Cannot find file " & Get_Name_String (Sources.Table (F)));
            Buffer := Load_File (File_Name);
            Exit_On_Error
              ((File_Name = No_Name),
               "Cannot read file " & Get_Name_String (Sources.Table (F)));
            AADL_Root := Parse (Language, AADL_Root, Buffer);
            Exit_On_Error
              (No (AADL_Root),
               "Cannot parse AADL specifications");
            exit when F = Sources.Last;
            F := F + 1;
         end loop;
      end;
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      Success := Analyze (Language, AADL_Root);
      Exit_On_Error (not Success, "Cannot analyze AADL specifications");
   end if;

   case Get_Current_Action is
      when Analyze_Model =>
         null;

      when Instantiate_Model =>
         AADL_Root := Instantiate_Model (AADL_Root);
         Exit_On_Error (No (AADL_Root), "Cannot instantiate AADL models");

      when Generate_Code =>
         if Get_Current_Backend_Name = Get_String_Name ("real_theorem")
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           or else Get_Current_Backend_Name = Get_String_Name ("real_pp")
         then
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            AADL_Root := Instantiate_Model (AADL_Root);
            Exit_On_Error (No (AADL_Root), "Cannot instantiate AADL models");

            Success := Analyze (RT.REAL_Language, AADL_Root);
            Exit_On_Error (not Success, "Cannot analyze REAL specifications");
         end if;
         Generate_Code (AADL_Root);

      when Analyze_With_Cheddar =>
         declare
            Args             : Argument_List_Access
              := new Argument_List
              (1 ..
               Integer (Sources.Last) - Integer (Sources.First) + 2);
            --  '-aadlv?' + all source files

            Index            : Integer := 1;
            Cheddar_Analyzer : constant String := "cheddar_analyzer";
         begin
            Args (Index) := new String'("-aadlv?");
            case Aadl_Version is
               when AADL_V1 =>
                  Args (Index)(Args (Index)'Last) := '1';
               when AADL_V2 =>
                  Args (Index)(Args (Index)'Last) := '2';
            end case;
            Index := Index + 1;

            for F in Sources.First .. Sources.Last loop
               File_Name := Search_File (Sources.Table (F));
               Exit_On_Error
                 ((File_Name = No_Name),
                  "Cannot find file " & Get_Name_String (Sources.Table (F)));

               Args (Index) := new String'(Get_Name_String (File_Name));
               Index := Index + 1;
            end loop;

            --  Invoke cheddar_analyzer

            Run_Command
              (Command_Name  => Cheddar_Analyzer,
               Argument_List => Args.all,
               Success       => Success);

            Free (Args);

            Exit_On_Error (not Success,
                           Cheddar_Analyzer & " died unexpectedly");
         end;

      when others =>
         null;
   end case;
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end Ocarina_Cmd;