The idea of your shell script and Makefile are the same. For me it doesn't matter which one is used but source code should have some kind of easily usable list

The idea of your shell script and Makefile are the same. For me it doesn't matter which one is used but source code should have some kind of easily usable list of common development tasks. Otherwise developers are doing this and that and the easier ways of doing repeatable stuff are not getting propagated to everybody.