Added bypassing spawn

src/alire-os_lib.adb

@@ -177,6 +177,21 @@ package body Alire.OS_Lib is
       end if;
    end Spawn;
 
+   ------------------
+   -- Spawn_Bypass --
+   ------------------
+
+   procedure Spawn_Bypass (Command   : String;
+                           Arguments : String := "")
+   is
+      Code : constant Integer := Spawn (Locate_In_Path (Command),
+                                        Argument_String_To_List (Arguments).all);
+   begin
+      if Code /= 0 then
+         raise Program_Error with "Exit code:" & Code'Image;
+      end if;
+   end Spawn_Bypass;
+
    ------------------
    -- Enter_Folder --
    ------------------

src/alire-os_lib.ads

@@ -15,6 +15,10 @@ package Alire.OS_Lib is
                     Force_Quiet : Boolean := False);
    --  Raises PROGRAM_ERROR if exit code /= 0
 
+   procedure Spawn_Bypass (Command   : String;
+                           Arguments : String := "");
+   --  Direct launch, without any shenanigangs on output, for example for respawning the canonical version
+
    type Folder_Guard (<>) is limited private;
    --  use this type in conjunction with Enter_Folder to ensure that
    --  the CWD is modified and restored when creating/destroying the Folder_Guard