Executing a NestJS script via the command line command

Looking to parse an XML file using the NestJS framework for a proof-of-concept, but feeling stuck on how to proceed.

I've set up a scripts directory within /src, and placed my script.ts in there with an initial console.log. How do I execute commands within that file? Is it necessary to convert the script.ts to plain JavaScript before running it with Node like "node myscript.ts"? What's the best approach to tackle this issue?

Answer №1

Successfully executed my TypeScript file by running npx ts-node my-file.ts

Answer №2

To customize your package.json file for a specific command, simply add a "bin" property with the desired command name and its associated JavaScript file. Once you have defined this in your package.json, running the designated command should execute properly after compiling from Typescript to Javascript. Check out an example here. The original command file is written in Typescript, using a shebang of #!/usr/bin/env node to allow for Node.js as the script runner, then compiled into Javascript along with the rest of the library. To run the command, simply use ogma <file_name> and let the script do the work.

If you're incorporating Nest into this setup, it will be an additional step but still manageable. Your entry file can utilize NestFactory to create the application and then pass data to a handler, as explained here. Feel free to reach out if you need further clarification or assistance.

Answer №4

For your specific needs, consider using ts-node. If your Typescript class handles XML parsing independently from Nest dependencies, you can refer to this. However, if your application requires the use of Nest for XML parsing, you can start the server and send a command line request with CURL following a similar pattern as demonstrated here.

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