ZSH USERS NOTE BACKWARD COMPATIBILITY WARNING!

Test for compctl first, as bash will never have compctl, but zsh may
have complete, if bashcompinit was called. Since we're using this test
for prompt/precmd as well as completion, we want to run the right logic.

z.sh

@@ -177,17 +177,9 @@ alias ${_Z_CMD:-z}='_z 2>&1'
 
 [ "$_Z_NO_RESOLVE_SYMLINKS" ] || _Z_RESOLVE_SYMLINKS="-P"
 
-if complete &> /dev/null; then
- # bash tab completion
- complete -o filenames -C '_z --complete "$COMP_LINE"' ${_Z_CMD:-z}
- [ "$_Z_NO_PROMPT_COMMAND" ] || {
-  # populate directory list. avoid clobbering other PROMPT_COMMANDs.
-  echo $PROMPT_COMMAND | grep -q "_z --add"
-  [ $? -gt 0 ] && PROMPT_COMMAND='_z --add "$(pwd '$_Z_RESOLVE_SYMLINKS' 2>/dev/null)" 2>/dev/null;'"$PROMPT_COMMAND"
- }
-elif compctl &> /dev/null; then
+if compctl &> /dev/null; then
  [ "$_Z_NO_PROMPT_COMMAND" ] || {
-  # populate directory list, avoid clobbering any other precmds
+  # zsh populate directory list, avoid clobbering any other precmds
   if [ "$_Z_NO_RESOLVE_SYMLINKS" ]; then
     _z_precmd() {
       _z --add "${PWD:a}"
@@ -206,4 +198,12 @@ elif compctl &> /dev/null; then
   reply=(${(f)"$(_z --complete "$compl")"})
  }
  compctl -U -K _z_zsh_tab_completion _z
+elif complete &> /dev/null; then
+ # bash tab completion
+ complete -o filenames -C '_z --complete "$COMP_LINE"' ${_Z_CMD:-z}
+ [ "$_Z_NO_PROMPT_COMMAND" ] || {
+  # bash populate directory list. avoid clobbering other PROMPT_COMMANDs.
+  echo $PROMPT_COMMAND | grep -q "_z --add"
+  [ $? -gt 0 ] && PROMPT_COMMAND='_z --add "$(pwd '$_Z_RESOLVE_SYMLINKS' 2>/dev/null)" 2>/dev/null;'"$PROMPT_COMMAND"
+ }
 fi