refactor(strings,tshark,tune2fs): use _comp_compgen -c for filedir

Author: akinomyoga

completions/strings

@@ -47,8 +47,7 @@ _comp_cmd_strings()
         [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
         return
     elif [[ $cur == @* ]]; then
-        cur=${cur:1}
-        _comp_compgen_filedir
+        _comp_compgen -c "${cur:1}" filedir
         COMPREPLY=("${COMPREPLY[@]/#/@}")
         return
     fi

completions/tshark

@@ -20,8 +20,7 @@ _comp_cmd_tshark()
             ;;
         -o*)
             if [[ $cur == *:* ]]; then
-                cur=${cur#*:}
-                _comp_compgen_filedir
+                _comp_compgen -c "${cur#*:}" filedir
             else
                 [[ -v _comp_cmd_tshark__prefs ]] ||
                     _comp_cmd_tshark__prefs="$("$1" -G defaultprefs 2>/dev/null | command sed -ne 's/^#\{0,1\}\([a-z0-9_.-]\{1,\}:\).*/\1/p' |
@@ -104,8 +103,7 @@ _comp_cmd_tshark()
             ;;
         -*X)
             if [[ ${cur:${#prefix}} == lua_script:* ]]; then
-                cur=${cur#*:}
-                _comp_compgen_filedir lua
+                _comp_compgen -c "${cur#*:}" filedir lua
             else
                 COMPREPLY=($(compgen -P "$prefix" -W 'lua_script:' -- \
                     "${cur:${#prefix}}"))

completions/tune2fs

@@ -55,8 +55,7 @@ _comp_cmd_tune2fs()
         return
     fi
 
-    : "${cur:=/dev/}"
-    _comp_compgen_filedir
+    _comp_compgen -c "${cur:-/dev/}" filedir
 } &&
     complete -F _comp_cmd_tune2fs tune2fs