100 lines
2.9 KiB
Plaintext
100 lines
2.9 KiB
Plaintext
export const metadata = {
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title: `${pageNumber} Custom CLI Scripts`,
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}
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# {metadata.title}
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In this chapter, you'll learn how to create and execute custom scripts using Medusa's CLI tool.
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## What is a Custom CLI Script?
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A custom CLI script is a function that you can execute using Medusa's CLI tool. It is useful when you need a script that has access to the [Medusa container](../medusa-container/page.mdx) and can be executed using Medusa's CLI.
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For example, you can create a custom CLI script that:
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- [Seeds data into the database](./seed-data/page.mdx).
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- Runs a script before starting the Medusa application.
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---
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## How to Create a Custom CLI Script?
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To create a custom CLI script, create a TypeScript or JavaScript file under the `src/scripts` directory. The file must export a function by default.
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For example, create the file `src/scripts/my-script.ts` with the following content:
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```ts title="src/scripts/my-script.ts"
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import {
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ExecArgs,
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} from "@medusajs/framework/types"
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import { Modules } from "@medusajs/framework/utils"
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export default async function myScript({ container }: ExecArgs) {
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const productModuleService = container.resolve(
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Modules.PRODUCT
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)
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const [, count] = await productModuleService
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.listAndCountProducts()
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console.log(`You have ${count} product(s)`)
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}
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```
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The function receives as a parameter an object with a `container` property, which is an instance of the Medusa Container. Use it to resolve resources in your Medusa application.
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---
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## How to Run a Custom CLI Script?
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To run a custom CLI script, run the Medusa CLI's `exec` command:
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```bash
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npx medusa exec ./src/scripts/my-script.ts
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```
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---
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## Custom CLI Script Arguments
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Your script can accept arguments from the command line. Arguments are passed to the function's object parameter in the `args` property.
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For example, create the following CLI script that logs the command line arguments:
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```ts
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import { ExecArgs } from "@medusajs/framework/types"
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export default async function myScript({ args }: ExecArgs) {
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console.log(`The arguments you passed: ${args}`)
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}
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```
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Then, run the script with the `exec` command and pass arguments after the script's path.
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```bash
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npx medusa exec ./src/scripts/my-script.ts arg1 arg2
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```
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---
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## Run Custom Script on Application Startup
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In some cases, you may need to perform an action when the Medusa application starts.
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If the action is related to a module, you should use a [loader](../modules/loaders/page.mdx). Otherwise, you can create a custom CLI script and run it before starting the Medusa application.
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To run a custom script on application startup, modify the `dev` and `start` commands in `package.json` to execute your script first.
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For example:
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```json title="package.json"
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{
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"scripts": {
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"startup": "medusa exec ./src/scripts/startup.ts",
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"dev": "npm run startup && medusa develop",
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"start": "npm run startup && medusa start"
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}
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}
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```
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The `startup` script will run every time you run the Medusa application. |