There is also Modernish, which is a library for writing portable shell scripts and it seems to support all kinds of different versions of shells across a variet

There is also Modernish, which is a library for writing portable shell scripts and it seems to support all kinds of different versions of shells across a variety of operating systems. It really takes care of all the quirks and bugs every platform has. https://github.com/modernish/modernish https://github.com/modernish/modernish