use fzf if installed

Author: lalyos

kubectl-examples

@@ -6,17 +6,22 @@ debug() {
 
 print-example() {
   declare res=$1 pattern=$2
-  SELF=${BASH_SOURCE}
-  [[ -L $SELF ]] && SELF=$(readlink ${SELF})
-  dir=$(dirname $SELF)
+
+  dir=$(dirname $(readlink $BASH_SOURCE))
   debug "dir=${dir}"
 
+  command fzf --version >/dev/null && FZF_INSTALLED=true
+
   if [[ $res == "" ]]; then
-    PS3="Resource Type: "
-    select res in [A-LN-Z][a-z]*; do
-      debug "res type choosen: ${res}"
-      break
-    done
+    if [[ $FZF_INSTALLED ]];then
+      res=$(cd ${dir}; ls -1 $dir|grep -v kubectl-examples | fzf -e --prompt="Resource Type>" )
+    else
+      PS3="Resource Type: "
+      select res in $(ls -1 $dir|grep -v kubectl-examples); do
+        debug "res type choosen: ${res}"
+        break
+      done
+    fi
   fi
 
   # resorce names can be abreviated
@@ -39,10 +44,19 @@ print-example() {
     *)
       debug "multiple choice"
       PS3="Yaml example: "
-      select yaml in ${dir}/${res}/**/*${pattern}*.yaml; do
-        debug "YAML selected: ${yaml}"
-        break
-      done
+      if [[ $FZF_INSTALLED ]];then
+        yaml=$(
+          cd ${dir}/${res}
+          ls -1 **/*${pattern}*.yaml \
+          | fzf -e --preview='cat {}'
+        )
+        yaml="${dir}/${res}/${yaml}"
+      else
+        select yaml in ${dir}/${res}/**/*${pattern}*.yaml; do
+          debug "YAML selected: ${yaml}"
+          break
+        done
+      fi
       ;;
   esac