git scripts update

scripts/git/submodule_pull.sh

@@ -7,10 +7,23 @@
 # @link      https://shadoll.dev
 #
 
-DIR=$(dirname "$0")
-ROOT=$(cd "$DIR"/.. && pwd)
+DIR=$(dirname $BASH_SOURCE)
+PROJECT=(${DIR//node_modules/ })
 
-chmod -R a=rwX,go-rwX "$ROOT"/docker/.ssh/
+git --version 2>&1 >/dev/null
+GIT_IS_AVAILABLE=$?
+if [ $GIT_IS_AVAILABLE -ne 0 ]; then
+    echo "ERROR: The program 'git' is currently not installed."
+    echo "Try: 'sudo apt install git' to install it"
+    exit 1
+fi
 
 git submodule init
-ssh-agent sh -c "ssh-add -D; ssh-add $ROOT/docker/.ssh/id_rsa; git submodule update"
+if [ -f $PROJECT/docker/.ssh/id_rsa ]; then
+    if [ `stat -c %a $PROJECT/docker/.ssh/id_rsa` -ne '600' ]; then
+        chmod -R a=rwX,go-rwX $PROJECT/docker/.ssh
+    fi
+    ssh-agent sh -c "ssh-add -D; ssh-add $ROOT/docker/.ssh/id_rsa; git submodule update"
+else
+    git submodule update
+fi