Added dry mode

action.yml

@@ -20,8 +20,12 @@ inputs:
     required: false
     default: '--write **/*.js'
   branch:
-    description: Branch which the changes are merged to
+    description: Target branch for the changes
     required: true
+  dry:
+    description: Running the script in dry mode just shows whether there are files that should be prettified or not
+    required: false
+    default: False
 
 runs:
   using: 'docker'

entrypoint.sh

@@ -40,10 +40,11 @@ echo "Installing prettier..."
 npm install --silent --global prettier
 
 echo "Prettifing files..."
-prettier $INPUT_PRETTIER_OPTIONS || echo "Problem while prettifying your files with options $INPUT_PRETTIER_OPTIONS"
+echo "Files:"
+prettier $INPUT_PRETTIER_OPTIONS || echo "Problem while prettifying your files with options $INPUT_PRETTIER_OPTIONS."
 
 # To keep runtime good, just continue if something was changed
-if _git_changed;
+if [! $INPUT_DRY] && [_git_changed];
 then
   # Calling method to configure the git environemnt
   _git_setup