diff --git a/.zshrc2 b/.zshrc2
index 68f9327..63dc6a3 100644
--- a/.zshrc2
+++ b/.zshrc2
@@ -95,7 +95,7 @@ esac
 sibd() { ssh -p 12022 root@$1${1:+.}ibd.ink }
 sob() { ssh -p 24022 root@$1${1:+.}ob.ac.cn }
 snasp() { ssh -o ProxyJump="ssh@nasp.ob.ac.cn:36022" dictxiong@$1 }
-git-branches() { git for-each-ref --sort=-committerdate refs/heads refs/remotes --format="%(authordate:format:%y-%m-%d.%a %H:%M %z)|%(color:red)%(objectname:short)|%(color:yellow)%(refname:short)%(color:reset)|%(color:reset)%(authorname): %(color:green)%(subject)" --color=always --count=${1:-10} | column -ts"|" }
+gbes() { git for-each-ref --sort=-committerdate refs/heads refs/remotes --format="%(authordate:format:%y-%m-%d.%a %H:%M %z)|%(color:red)%(objectname:short)|%(color:yellow)%(refname:short)%(color:reset)|%(color:reset)%(authorname): %(color:green)%(subject)" --color=always | column -ts"|" | less -FX }
 piv-agent()
 {
     eval $(ssh-agent -k)
diff --git a/install.sh b/install.sh
index 722ad1d..c20add2 100755
--- a/install.sh
+++ b/install.sh
@@ -258,7 +258,7 @@ uninstall(){
 
 parse_arg "$@"
 FUNC=install
-for i in ${ARG_PARSED[@]}; do
+for i in ${PARSE_ARG_RET[@]}; do
     case $i in
         -i ) FUNC=install ;;
         -r ) FUNC=uninstall ;;
diff --git a/tools/common.sh b/tools/common.sh
index 9a6c97f..c376518 100755
--- a/tools/common.sh
+++ b/tools/common.sh
@@ -105,14 +105,14 @@ fi
 parse_arg()
 {
     local ARG=""
-    ARG_PARSED=()
+    PARSE_ARG_RET=()
     while [[ $# > 0 || -n "$ARG" ]]; do
         if [[ -z "$ARG" ]]; then ARG=$1; shift; fi
         case $ARG in
-            -q*|--quite ) export DFS_QUIET=1 ;;
-            --* ) ARG_PARSED+=("$ARG") ;;
-            -* ) ARG_PARSED+=("${ARG:0:2}") ;;
-            *  ) ARG_PARSED+=("$ARG") ;;
+            -q*|--quite ) DFS_QUIET=1 ;;
+            --* ) PARSE_ARG_RET+=("$ARG") ;;
+            -* ) PARSE_ARG_RET+=("${ARG:0:2}") ;;
+            *  ) PARSE_ARG_RET+=("$ARG") ;;
         esac
         if [[ "$ARG" == "--"* || ! "$ARG" == "-"* || ${#ARG} -le 2 ]]; then
             ARG=""
@@ -191,3 +191,5 @@ if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
 else
     setup_color
 fi
+
+unset THIS_DIR_COMMON_SH