Check for rabbitmqctl using `[ -x ]` and not `which` in autocompletion

scripts/bash_autocomplete.sh

@@ -1,9 +1,11 @@
 _rabbitmqctl_complete() {
-    COMPREPLY=()
-    local LANG=en_US.UTF-8
-    local word="${COMP_WORDS[COMP_CWORD]}"
-    local completions="$(export LANG=en_US.UTF-8; export LC_CTYPE=en_US.UTF-8; /usr/lib/rabbitmq/bin/rabbitmqctl --auto-complete $COMP_LINE)"
-    COMPREPLY=( $(compgen -W "$completions" -- "$word") )
+    if [ -x /usr/lib/rabbitmq/bin/rabbitmqctl ]; then
+        COMPREPLY=()
+        local LANG=en_US.UTF-8
+        local word="${COMP_WORDS[COMP_CWORD]}"
+        local completions="$(export LANG=en_US.UTF-8; export LC_CTYPE=en_US.UTF-8; /usr/lib/rabbitmq/bin/rabbitmqctl --auto-complete $COMP_LINE)"
+        COMPREPLY=( $(compgen -W "$completions" -- "$word") )
+    fi
 }
 
 complete -f -F _rabbitmqctl_complete rabbitmqctl

scripts/rabbitmqctl-autocomplete.sh

@@ -1,5 +1,3 @@
-if which rabbitmqctl > /dev/null; then
-    if [ -n "$BASH_VERSION" ]; then
-        . /usr/lib/rabbitmq/autocomplete/bash_autocomplete.sh
-    fi
+if [ -n "$BASH_VERSION" ]; then
+    . /usr/lib/rabbitmq/autocomplete/bash_autocomplete.sh
 fi

scripts/zsh_autocomplete.sh

@@ -1,10 +1,12 @@
 _rabbitmqctl_complete() {
-    local word completions a
-    local LANG=en_US.UTF-8
-    read -cl a
-    word="$1"
-    completions="$(export LANG=en_US.UTF-8; export LC_CTYPE=en_US.UTF-8;  /usr/lib/rabbitmq/bin/rabbitmqctl --auto-complete ${=a})"
-    reply=( "${(ps:\n:)completions}" )
+    if [ -x /usr/lib/rabbitmq/bin/rabbitmqctl ]; then
+        local word completions a
+        local LANG=en_US.UTF-8
+        read -cl a
+        word="$1"
+        completions="$(export LANG=en_US.UTF-8; export LC_CTYPE=en_US.UTF-8; /usr/lib/rabbitmq/bin/rabbitmqctl --auto-complete ${=a})"
+        reply=( "${(ps:\n:)completions}" )
+    fi
 }
 
 compctl -f -K _rabbitmqctl_complete rabbitmqctl