How could I use the CLI in other project?

[negahama]

Hello, everyone
I've made my CLI, So I want to use this CLI in my other project. but I don't know how to do it.
Is the CLI generated to stand-alone executive file by the Langium?
I think my question is so stupid...
Sorry to bother you with such like this question
I am not good at web development. I hope kind and useful response as usual
Thank you!

[msujew]

Hey @negahama,

Can you explain a bit how you want to use the CLI in your other project? Is your other project also a JavaScript/TypeScript app?

[negahama]

@msujew Yes. What I made is transpiler to transpile my DSL to TypeScript codes.
So I want to append my CLI program to other TypeScript app to convert my DSL codes..
I hope my CLI program would be operated like tsc (TypeScript Compiler).

[msujew]

In theory, you could just run node <path/to/cli.js> to run the transpiler as a separate process. However I would recommend something different:

You can add a dependency from your app to the cli package and invoke the transpiler from code. This has a few benefits, mainly:

• Allows to debug your transpiler (if you need to) from the other app
• Better error handling - usually a CLI just exits with status 1 and tells the user relatively little what went wrong. A programming API could have better access to any internal error of the transpiler.

[negahama]

Thank you so much.
Do you happened to know some samples or articles to show me?
There is "A picture is worth a thousand words"

[msujew]

We do have an example for something similar available over at the langium-lox repo. See here for the interpreter and here for the notebool kernel that uses that interpreter.

Whether its a transpiler or interpreter barely matters, they are very similar from an architectural perspective.