upgrade dev mode

tools/upgrade-miaou-bash

@@ -2,6 +2,8 @@
 
 set -Eeuo pipefail
 
+if [[ $(stat -c %u /opt/miaou-bash) -eq 0 ]]; then
+
     if [[ -d /opt/miaou-bash ]]; then
         local_release=$(cat /opt/miaou-bash/.semver_git_tag)
     fi
@@ -16,3 +18,15 @@ if [[ $local_release != $remote_release ]]; then
     else
         echo " up-to-date!"
     fi
+else
+    echo DEVELOPMENT MODE detected!
+    if [[ $(stat -c %u /opt/miaou-bash) -eq $(id -u) ]]; then
+        cd /opt/miaou-bash
+        git pull
+        cd -
+        echo "git refreshed"
+    else
+        echo "please, ask user <$(stat -c %U /opt/miaou-bash)> to perform a git refresh!"
+        exit 1
+    fi
+fi