Format CMake files
You can use the cmake-format tool and local .cmake-format, .py, or .json configuration files to format any text in CMake files that you do not guard with a pair of fences. You must install the tool and tell Qt Creator where you installed it.
To automatically format CMake files upon file save:
- Select Preferences > CMake > Formatter. 
- In CMakeFormat command, enter the path to cmake-format.exe.
- Select Automatic formatting on file save to automatically format CMake files when you save them.
- In Restrict to MIME types, add the MIME types of the files to format, separated by semicolons. The default value, text/x-cmakeformats CMake files. If the field is empty, all files are formatted.
- Select the Restrict to files contained in the current project check box to only format CMake files that belong to the current project.
See also How To: Build with CMake, Edit MIME types, and CMake.