The checkstyle tool is provided to help Dojo developers conform to the Dojo style guides. Read the help by running the command: checkstyle.sh help or checkstyle.bat.help If you want to use the checkstyleReport.html tool to fix style errors and save the files, make a copy of the file 'checkstyle.php.rename.html', and call it 'checkstyle.php'. This script will then be used to save fixed files. All fixed files end in '.checkstyle.js', e.g. dojo/back.js.checkstyle.js. Cnce you are satisfied with the changes, commit them all by typing: checkstyle.sh commit Troubleshooting --------------- 1. It says the file was saved but nothing was saved Use firebug's NET tab to see the result return from the checkstyle.php call. If it's a permission denied error, probably your webserver is running as a different user and can't write into your workspace. I solved this problem by doing: $ find . -type d -exec chmod 777 {} \; from the root of my project. Probably there's a better way.