Use python-argcompletion.

patool

@@ -141,6 +141,11 @@ def create_argparser():
     parser_search.add_argument('archive', help='the archive file')
     # formats
     subparsers.add_parser('formats', help="show supported archive formats")
+    try:
+        import argcomplete
+        argcomplete.autocomplete(parser)
+    except ImportError:
+        pass
     return parser
 
 

patool.bash-completion

@@ -1,44 +1,19 @@
 # patool completion
-#
+
 have patool &&
-{
 _patool()
 {
-	local cur prev commands options command
+    local cur prev
 
-	COMPREPLY=()
-	cur=`_get_cword`
+    COMPREPLY=()
+    cur=${COMP_WORDS[COMP_CWORD]}
+    prev=${COMP_WORDS[COMP_CWORD-1]}
 
-	commands='extract list test create diff repack formats'
-
-	if [[ $COMP_CWORD -eq 1 ]] ; then
-		if [[ "$cur" == -* ]]; then
-			COMPREPLY=( $( compgen -W '--help' -- $cur ) )
-		else
-			COMPREPLY=( $( compgen -W "$commands" -- $cur ) )
-		fi
-	else
-
-		command=${COMP_WORDS[1]}
-
-		if [[ "$cur" == -* ]]; then
-			# possible options for the command
-			options=''
-			case $command in
-				extract|list|test|create)
-					options='--verbose'
-					;;
-			esac
-			options="$options --help"
-
-			COMPREPLY=( $( compgen -W "$options" -- $cur ) )
-		else
-			_filedir
-		fi
-	fi
-
-	return 0
+    if type _argcomplete &> /dev/null; then
+        _argcomplete "$@"
+    else
+        _filedir
+    fi
+    return 0
 }
 complete -F _patool $filenames patool
-
-}