Calling a function of erlang file from shell script

Question

我有一个文件xyz.erl，其中包含一个功能fun1。我想从linux脚本中调用它。

Answer 1

You can create escript from your file. Follow the instructions

In brief, you should add call instructions for the shell and erlang to the begginig of you file

#!/usr/bin/env escript
%% -*- erlang -*-

Then make file executable.

Then you can call erlang script as conventional script. Note that you still required Erlang runtime installed to execute script.

Erlang calls main/1 function of the script but you can pass function name as an argument to call it

main([Fun]) ->
    FunAtom = list_to_atom(Fun),
    ?MODULE:FunAtom().