update the ci-cd, main.yml file to run the comit and push command onl…

…y if changes are detected using git status --porcelain option

.github/workflows/main.yml

@@ -17,7 +17,14 @@ jobs:
         ls xml
         git config --global user.email "[email protected]"
         git config --global user.name "Enrico Fucile"
-        git branch 
-        git add .
-        git commit -m "xml files" -a
-        git push
+        git branch
+        # Use of status --pocelain to check if files have been changed or not
+        # If changes commit and push
+        if [[ `git status --porcelain` ]]; then
+          git add .
+          git commit -m "xml,txt files" -a
+          git push
+        # if not, only print a message saying not commit
+        else
+          echo "No changes to commit"
+        fi