fixup! No longer require hooks/extensions must be added to overlays

Author: lrascao

priv/templates/extended_bin

@@ -189,7 +189,7 @@ Commands:
   versions                Print versions of the release available
   escript                 Run an escript in the same environment as the release
   status                  Verify node is running and then run status hook scripts
-  $EXTENSION_DESCRIPTIONS"
+$(relx_extension_descriptions)"
             fi
             ;;
     esac
@@ -548,6 +548,20 @@ relx_run_extension() {
     [ -f "$RELEASE_ROOT_DIR/$EXTENSION_SCRIPT" ] && . "$RELEASE_ROOT_DIR/$EXTENSION_SCRIPT" "$@"
 }
 
+relx_extension_descriptions() {
+    IFS0=$IFS
+    IFS='|'
+    for description in $EXTENSION_DESCRIPTIONS
+    do
+        cmd=$(echo "$description" |cut -d '=' -f1)
+        descr=$(echo "$description" |cut -d '=' -f2)
+        # 23 is the magic number of spaces that take up
+        # the space between a command and it's description
+        printf '  %-23s %s\n' "$cmd" "$descr"
+    done
+    IFS=$IFS0
+}
+
 # given a list of arguments, identify the internal ones
 #   --relx-disable-hooks
 # and process them accordingly