Extensions

- Created scripts/extensions/README to describe samples.
- Created sample extension scripts of each type.

scripts/extensions/program_hook.lua

@@ -0,0 +1,31 @@
+-- Program Hook Extension.
+-- Implementing goodbye message.
+
+-- Arguments: None
+-- Returns:   An 8-element list of installation details.  Only called once, on
+--            installation of the extension.
+function install ()
+  return 'program',                        -- Type
+         'goodbye',                        -- Name
+         1.0,                              -- Version
+         'Simply says goodbye',            -- Description
+         'Paul Beckingham',                -- Author
+         'paul@beckingham.net',            -- Contact
+         'GPLv2',                          -- License
+         '© 2011, Göteborg Bit Factory'    -- Copyright
+end
+
+-- Arguments: None
+-- Returns:   String identifying valid program hook
+function hook ()
+  return 'on-exit'
+end
+
+-- Arguments: None
+-- Returns:   1, 'error' --> failure
+--            0, nil     --> success
+function goodbye ()
+  print ('Goodbye.')
+  return 0, nil
+end
+