From 641a9de75d8729c79dda85adbc74420c8c5afb19 Mon Sep 17 00:00:00 2001
From: liuhuan <qq384012351@gmail.com>
Date: Thu, 16 Jun 2016 07:04:28 +0800
Subject: [PATCH] if  is empty then  [: =: unary operator expected

---
 vimfiles/tools/shell/bash/update-tags.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/vimfiles/tools/shell/bash/update-tags.sh b/vimfiles/tools/shell/bash/update-tags.sh
index 56c87854..fca5b2de 100644
--- a/vimfiles/tools/shell/bash/update-tags.sh
+++ b/vimfiles/tools/shell/bash/update-tags.sh
@@ -3,12 +3,12 @@
 # create tags
 echo "Creating Tags..."
 
-if [ ${CUSTOM} = true ]; then
+if [[ ${CUSTOM} = true ]]; then
     echo "  |- move custom ctags to ${TARGET}"
     cp "${SOURCE}" "${TARGET}"
 else
     # choose ctags path first
-    if [ -f "${DEST}/files" ]; then
+    if [[ -f "${DEST}/files" ]]; then
         FILES="-L ${DEST}/files"
     else
         FILES="-R ."
@@ -19,7 +19,7 @@ else
     ${CTAGS_CMD} -o "${TMP}" ${OPTIONS} "${FILES}"
 
     # replace old file
-    if [ -f "${TMP}" ]; then
+    if [[ -f "${TMP}" ]]; then
         echo "  |- move ${TMP} to ${TARGET}"
         mv -f "${TMP}" "${TARGET}"
     fi