There is also m4sh which are just M4 macros that compile to portable bash scripts. Albeit it is not convenient to write in, and probably harder to avoid making

There is also m4sh which are just M4 macros that compile to portable bash scripts. Albeit it is not convenient to write in, and probably harder to avoid making mistakes. [0] https://www.gnu.org/software/autoconf/manual/autoconf-2.62/html_node/Programming-in-M4sh.html https://www.gnu.org/software/autoconf/manual/autoconf-2.62/h...