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I had used some library, let's say it is Clojure itself (which is always added to project.clj). Clojure provides clj CLI tool (which is src/cli/clojure/main.clj, but nevermind). How to use it with lein? I mean, is there any command/plugin/technique which will allow me to use library's main?

Anthony
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1 Answers1

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Every Var in every namespace is equal in the eyes of Clojure. From your code, just execute like:

   (some.awesome.lib/-main ...)

or whatever the fully-qualified symbol pointing to the Var in question.

For further details, please see this question:

Also

See the output of

> lein help run

Using lein, you can type

lein run -m my.awesome.proj/some-fn

or

lein run -m some.awesome.lib/-main

since to Clojure some.awesome.lib/-main is no different than any other function (the hyphen prefix on -main is just a convention and makes no difference to the Clojure compiler).

You can also set up project.clj to automatically call any function of your choosing when you type lein run by adding:

:main some.awesome.lib/-main
Alan Thompson
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  • I don't want to execute it in my code, but I do want to execute it with `lein` tool. – Anthony Sep 08 '21 at 05:52
  • Thank you. I don't know *how* I read help for `run` sub-command, but I didn't see the `-m` option. This is what exactly I wanted. – Anthony Sep 08 '21 at 06:09
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    `lein run some.awesome.lib` should work for `-main` in `some.awesome.lib`? – cfrick Sep 08 '21 at 06:21
  • Yeah, there's no "in your project" vs "not in your project" distinction. You can confirm this without even needing a dependency: `lein run -m clojure.main` works fine, and clojure.main certainly isn't in my project. – amalloy Sep 08 '21 at 07:55
  • Ya know, I tested that and must have made a mistake! Fixed. – Alan Thompson Sep 08 '21 at 13:58