Add alias-finder plugin (#7768)

plugins/alias-finder/alias-finder.plugin.zsh

@@ -0,0 +1,46 @@
+alias-finder() {
+  local cmd="" exact="" longer="" wordStart="" wordEnd="" multiWordEnd=""
+  for i in $@; do
+    case $i in
+      -e|--exact) exact=true;;
+      -l|--longer) longer=true;;
+      *) 
+        if [[ -z $cmd ]]; then
+          cmd=$i
+        else
+          cmd="$cmd $i"
+        fi
+        ;;
+    esac
+  done
+  cmd=$(sed 's/[].\|$(){}?+*^[]/\\&/g' <<< $cmd) # adds escaping for grep
+  if [[ $(wc -l <<< $cmd) == 1 ]]; then
+    while [[ $cmd != "" ]]; do
+      if [[ $longer = true ]]; then
+        wordStart="'{0,1}"
+      else
+        wordEnd="$"
+        multiWordEnd="'$"
+      fi
+      if [[ $cmd == *" "* ]]; then
+        local finder="'$cmd$multiWordEnd"
+      else
+        local finder=$wordStart$cmd$wordEnd
+      fi
+      alias | grep -E "=$finder"
+      if [[ $exact = true || $longer = true ]]; then
+        break
+      else
+        cmd=$(sed -E 's/ {0,1}[^ ]*$//' <<< $cmd) # removes last word
+      fi
+    done
+  fi
+}
+
+preexec_alias-finder() {
+  if [[ $ZSH_ALIAS_FINDER_AUTOMATIC = true ]]; then
+    alias-finder $1
+  fi
+}
+
+preexec_functions+=(preexec_alias-finder)