View difference between Paste ID: KgtjePFm and 7Nq6R70n

 -- Extensions version 2.1 by KnightMiner
 
 -- Check if we are loading as an API or running the startup
 if not shell then
   -- Load the list of extensions
   local file = fs.open( "extensions.cfg", "r" )
   list = textutils.unserialize( file.readAll() )
   file.close()
 
   -- Function to check if a program is a file and what to run it with
   function program( name )
     local prog, file, noExt
     if name:find( '^".-"' ) then
       prog = list[string.match( name, '^".-%.([^. ]+)"' )]
       file = string.match( name, '^(".-%.[^. ]+")' )
       noExt = name:gsub( '^"(.-)%.[^. ]+"', '"%1"' )
     else
       prog = list[string.match( name, '^[^ ]-%.([^. ]+)' )]
       file = string.match( name, '^([^ ]-%.[^. ]+)' )
       noExt = name:gsub( '^([^ ]-)%.[^. ]+', '%1' )
     end
     if type( prog ) == "table" then
       if prog.noExt then
         return prog[1], file, noExt
       else
         return prog[1], file
       end
     else
       return prog, file
     end
   end
 
 -- Running as a program
 else
   -- validate args
   local args = { ... }
   if #args > 2 or args[1] == "usage" then
     print( "Usage: extensions [option] [option2]" )
   end
 
   -- Check for an extensions configuration file
   -- If it does not exist, ask to create it
   if not fs.exists( "extensions.cfg" ) then
     function create( default )
       print( "Creating extension.cfg" )
       local file = fs.open( "extensions.cfg", "w" )
       file.write( '{\n  -- Lua table containing file extensions\n  cfg = "edit"\n}' )
       file.close()
       if default then
         print( "Created default extensions.cfg" )
       else
         shell.run( "edit extensions.cfg" )
       end
     end
     if args[1] == "create" or args[1] == "create-default" then
       create( args[1] == "create-default" )
     elseif args[1] == "skip" then
       print( "Missing extensions.cfg file, cancelling" )
       return
     else
       print( "Missing extensions.cfg file, create it? (y/n)" )
       while true do
         local _, key = os.pullEvent( "key" )
         -- remove any stray character events
         os.startTimer(0.1)
         os.pullEvent()
         if key == keys.y then
           create()
           break
         elseif key == keys.n then
           print( "Cancelling extension loading" )
           return
         end
       end
     end
   end
 
   -- Check to see if we already ran the extension program
   -- And if so, ask if we should reload
   if extensions then
     if ( args[2] or args[1] ) == "load" then
       print( "Extensions already loaded, cancelling" )
       return
     elseif ( args[2] or args[1] ) == "reload" then
       print( "Reloading extension support" )
     else
       print( "Extensions already loaded, reload them? (y/n)" )
       while true do
         local _, key = os.pullEvent( "key" )
         -- remove any stray character events
         os.startTimer(0.1)
         os.pullEvent()
         if key == keys.y then
           print( "Reloading extension support" )
           break
         elseif key == keys.n then
           print( "Cancelling extension reloading" )
           return
         end
       end
     end
     os.unloadAPI( "extensions" )
   else
     -- Preserve the original method of running
     print( "Loading extension support" )
     shell.runRaw = shell.run
   end
 
   os.loadAPI( "extensions" )
   if not extensions.list then
     print( "Error loading extensions" )
     return
   end
 
   -- Override the shell.run function, so extensions run is used by default
   shell.run = function( name, ... )
     local program, progName, noExt = extensions.program( name )
     if program then
       if fs.exists( progName ) then
         return shell.runRaw( program, noExt or name, ... )
       else
         printError( "No such file" )
         return false
       end
     else
       return shell.runRaw( name, ... )
     end
   end
 
   print( "Extensions successfully loaded" )
 end