我用Erlang和rebar构建了一个gen_server。 现在我该如何运行它？

Question

Rebar included the framework, [blah]_sup.erl and so on. I added my one external dependency to rebar.config . I added a file to src/ , which is a gen_server that handles most of the work. I've added that gen_server file to [blah]_sup.erl so the gen_server starts as a child, and starts when the app starts. Of course I've compiled everything with rebar compile .

What do I do now? I don't know how to start the app!

Answer 1

As Jr0 suggests in the comment you run:

application:start(blah).

However, you need to make sure you add the dependency path first:

code:add_patha("../deps/<dependency name goes here>/ebin").

and make sure it' started:

{ok, _} = application:ensure_all_started(<dependency name goes here>).

Personally I tend to make a stand-alone module called blah.erl that does the above for me and just call that.

Answer 2

In your local instance, the easiest way is to just run:

rebar3 shell

This will run your application correctly.