Improved Stability of Pushing

- Updated code from the template I used

entrypoint.sh

@@ -3,41 +3,42 @@
 set -eux
 
 # Function for setting up git env in the docker container (copied from https://github.com/stefanzweifel/git-auto-commit-action/blob/master/entrypoint.sh)
-git_setup ( ) {
-  cat <<- EOF > $HOME/.netrc
-        machine github.com
-        login $GITHUB_ACTOR
-        password $GITHUB_TOKEN
-        machine api.github.com
-        login $GITHUB_ACTOR
-        password $GITHUB_TOKEN
-EOF
-    chmod 600 $HOME/.netrc
-
+_git_setup ( ) {
     git config --global user.email "actions@github.com"
-    git config --global user.name "GitHub Actions"
+    git config --global user.name "Prettier Action"
 }
 
-# Calling method to configure the git environemnt
-git_setup
+_git_changed() {
+    [[ -n "$(git status -s)" ]]
+}
+
+_git_push() {
+    if [ -z "$INPUT_BRANCH" ]
+    then
+        git push origin
+    else
+        git push --set-upstream origin "HEAD:$INPUT_BRANCH"
+    fi
+}
 
 echo "Installing prettier..."
 npm install --silent --global prettier
+
 echo "Prettifing files..."
 prettier $INPUT_PRETTIER_OPTIONS || echo "Problem while prettifying your files!"
 
-if ! git diff --quiet
+if _git_changed;
 then
+  # Calling method to configure the git environemnt
+  _git_setup
   echo "Commiting and pushing changes..."
-  # The remote changes should already be fetched, but as there is #4 this could resolve the problem
-  git fetch
   # Switch to the actual branch
   git checkout $INPUT_BRANCH
   # Add changes to git
   git add "${INPUT_FILE_PATTERN}"
   # Commit and push changes back
   git commit -m "$INPUT_COMMIT_MESSAGE" --author="$GITHUB_ACTOR <$GITHUB_ACTOR@users.noreply.github.com>" ${INPUT_COMMIT_OPTIONS:+"$INPUT_COMMIT_OPTIONS"}
-  git push --set-upstream origin "HEAD:$INPUT_BRANCH"
+  _git_push
   echo "Changes pushed successfully."
 else
   echo "Nothing to commit. Exiting."