Since the CMakeLists.txt in the topmost directory is now on the repository, there needs to be a way to keep this file from being committed and recommitted every time someone changes the list of projects they’re working on.

Accordingly, there is now an entry in .gitignore for a file called subdirectories.txt, also in the topmost directory. Instead of hardcoding the list of add_subdirectory commands, CMakeLists.txt now loops through that file and adds the directories it finds.

The file sample-subdirectories.txt illustrates the format. Right now the format is pretty barebones - one subdirectory on a line, and each line contains a subdirectory and nothing else. However, it might be worthwhile to allow for comments and whitespace.

Pete