gcc/ada/prj-conf.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              P R J . C O N F                             --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --            Copyright (C) 2006-2009, Free Software Foundation, Inc.       --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 --  The following package manipulates the configuration files
  27
  28 with Prj.Tree;
  29
  30 package Prj.Conf is
  31
  32    type Config_File_Hook is access procedure
  33      (Config_File       : in out Prj.Tree.Project_Node_Id;
  34       Project_Node_Tree : Prj.Tree.Project_Node_Tree_Ref);
  35    --  Hook called after the config file has been parsed. This lets the
  36    --  application do last minute changes to it (GPS uses this to add the
  37    --  default naming schemes for instance). At that point, the config file
  38    --  has not been applied to the project yet. When no config file was found,
  39    --  and automatic generation is disabled, it is possible that Config_File
  40    --  is set to Empty_Node when this procedure is called. You can then decide
  41    --  to create a new config file if you need.
  42
  43    procedure Parse_Project_And_Apply_Config
  44      (Main_Project               : out Prj.Project_Id;
  45       User_Project_Node          : out Prj.Tree.Project_Node_Id;
  46       Config_File_Name           : String := "";
  47       Autoconf_Specified         : Boolean;
  48       Project_File_Name          : String;
  49       Project_Tree               : Prj.Project_Tree_Ref;
  50       Project_Node_Tree          : Prj.Tree.Project_Node_Tree_Ref;
  51       Packages_To_Check          : String_List_Access;
  52       Allow_Automatic_Generation : Boolean := True;
  53       Automatically_Generated    : out Boolean;
  54       Config_File_Path           : out String_Access;
  55       Target_Name                : String := "";
  56       Normalized_Hostname        : String;
  57       Flags                      : Processing_Flags;
  58       On_Load_Config             : Config_File_Hook := null);
  59    --  Find the main configuration project and parse the project tree rooted at
  60    --  this configuration project.
  61    --
  62    --  Project_Node_Tree must have been initialized first (and possibly the
  63    --  value for external references and project path should also have been
  64    --  set).
  65    --
  66    --  If the processing fails, Main_Project is set to No_Project. If the error
  67    --  happened while parsing the project itself (i.e. creating the tree),
  68    --  User_Project_Node is also set to Empty_Node.
  69    --
  70    --  Autoconf_Specified indicates whether the user has specified --autoconf.
  71    --  If this is the case, the config file might be (re)generated, as
  72    --  appropriate, to match languages and target if the one specified doesn't
  73    --  already match.
  74    --
  75    --  Normalized_Hostname is the host on which gprbuild is returned,
  76    --  normalized so that we can more easily compare it with what is stored in
  77    --  configuration files. It is used when the target is unspecified, although
  78    --  we need to know the target specified by the user (Target_Name) when
  79    --  computing the name of the default config file that should be used.
  80    --
  81    --  If specified, On_Load_Config is called just after the config file has
  82    --  been created/loaded. You can then modify it before it is later applied
  83    --  to the project itself.
  84    --
  85    --  Any error in generating or parsing the config file is reported via the
  86    --  Invalid_Config exception, with an appropriate message. Any error while
  87    --  parsing the project file results in No_Project.
  88
  89    procedure Process_Project_And_Apply_Config
  90      (Main_Project               : out Prj.Project_Id;
  91       User_Project_Node          : Prj.Tree.Project_Node_Id;
  92       Config_File_Name           : String := "";
  93       Autoconf_Specified         : Boolean;
  94       Project_Tree               : Prj.Project_Tree_Ref;
  95       Project_Node_Tree          : Prj.Tree.Project_Node_Tree_Ref;
  96       Packages_To_Check          : String_List_Access;
  97       Allow_Automatic_Generation : Boolean := True;
  98       Automatically_Generated    : out Boolean;
  99       Config_File_Path           : out String_Access;
 100       Target_Name                : String := "";
 101       Normalized_Hostname        : String;
 102       Flags                      : Processing_Flags;
 103       On_Load_Config             : Config_File_Hook := null;
 104       Reset_Tree                 : Boolean := True);
 105    --  Same as above, except the project must already have been parsed through
 106    --  Prj.Part.Parse, and only the processing of the project and the
 107    --  configuration is done at this level.
 108    --
 109    --  If Reset_Tree is true, all projects are first removed from the tree.
 110    --  When_No_Sources indicates what should be done when no sources are found
 111    --  for one of the languages of the project.
 112    --
 113    --  If Require_Sources_Other_Lang is true, then all languages must have at
 114    --  least one source file, or an error is reported via When_No_Sources. If
 115    --  it is false, this is only required for Ada (and only if it is a language
 116    --  of the project).
 117
 118    Invalid_Config : exception;
 119
 120    procedure Get_Or_Create_Configuration_File
 121      (Project                    : Prj.Project_Id;
 122       Project_Tree               : Prj.Project_Tree_Ref;
 123       Project_Node_Tree          : Prj.Tree.Project_Node_Tree_Ref;
 124       Allow_Automatic_Generation : Boolean;
 125       Config_File_Name           : String := "";
 126       Autoconf_Specified         : Boolean;
 127       Target_Name                : String := "";
 128       Normalized_Hostname        : String;
 129       Packages_To_Check          : String_List_Access := null;
 130       Config                     : out Prj.Project_Id;
 131       Config_File_Path           : out String_Access;
 132       Automatically_Generated    : out Boolean;
 133       Flags                      : Processing_Flags;
 134       On_Load_Config             : Config_File_Hook := null);
 135    --  Compute the name of the configuration file that should be used. If no
 136    --  default configuration file is found, a new one will be automatically
 137    --  generated if Allow_Automatic_Generation is true.
 138    --
 139    --  Any error in generating or parsing the config file is reported via the
 140    --  Invalid_Config exception, with an appropriate message.
 141    --
 142    --  On exit, Configuration_Project_Path is never null (if none could be
 143    --  found, Os.Fail was called and the program exited anyway).
 144    --
 145    --  The choice and generation of a configuration file depends on several
 146    --  attributes of the user's project file (given by the Project argument),
 147    --  e.g. list of languages that must be supported. Project must therefore
 148    --  have been partially processed (phase one of the processing only).
 149    --
 150    --  Config_File_Name should be set to the name of the config file specified
 151    --  by the user (either through gprbuild's --config or --autoconf switches).
 152    --  In the latter case, Autoconf_Specified should be set to true to indicate
 153    --  that the configuration file can be regenerated to match target and
 154    --  languages. This name can either be an absolute path, or the base name
 155    --  that will be searched in the default config file directories (which
 156    --  depends on the installation path for the tools).
 157    --
 158    --  Target_Name is used to chose the configuration file that will be used
 159    --  from among several possibilities.
 160    --
 161    --  If a project file could be found, it is automatically parsed and
 162    --  processed (and Packages_To_Check is used to indicate which packages
 163    --  should be processed)
 164
 165    procedure Apply_Config_File
 166      (Config_File  : Prj.Project_Id;
 167       Project_Tree : Prj.Project_Tree_Ref);
 168    --  Apply the configuration file settings to all the projects in the
 169    --  project tree. The Project_Tree must have been parsed first, and
 170    --  processed through the first phase so that all its projects are known.
 171    --
 172    --  Currently, this will add new attributes and packages in the various
 173    --  projects, so that when the second phase of the processing is performed
 174    --  these attributes are automatically taken into account.
 175
 176    procedure Add_Default_GNAT_Naming_Scheme
 177      (Config_File  : in out Prj.Tree.Project_Node_Id;
 178       Project_Tree : Prj.Tree.Project_Node_Tree_Ref);
 179    --  A hook that will create a new config file (in memory), used for
 180    --  Get_Or_Create_Configuration_File and Process_Project_And_Apply_Config
 181    --  and add the default GNAT naming scheme to it. Nothing is done if the
 182    --  config_file already exists, to avoid overriding what the user might
 183    --  have put in there.
 184
 185    --------------
 186    -- Runtimes --
 187    --------------
 188
 189    procedure Set_Runtime_For (Language : Name_Id; RTS_Name : String);
 190    --  Specifies the runtime to use for a specific language. Most of the time
 191    --  this should be used for Ada, but other languages can also specify their
 192    --  own runtime. This is in general specified via the --RTS command line
 193    --  switch, and results in a specific component passed to gprconfig's
 194    --  --config switch then automatically generating a configuration file.
 195
 196    function Runtime_Name_For (Language : Name_Id) return String;
 197    --  Returns the runtime name for a language. Returns an empty string if no
 198    --  runtime was specified for the language using option --RTS.
 199
 200 end Prj.Conf;