Nuxt•2mo ago

How to define external packages in build

Postgres is used for local db during dev, and neon on cloudflare. The cloudflare preset build will fail if I try import postgres, so how do I mark it as an external dependancy in my nuxt/nitro/vite/rollup build so it isn't bundled? I'm already using an inline import statement to support this at runtime.

4 Replies

kapa.ai•2mo ago

Hi @Titan. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To define external packages in your Nuxt build and prevent them from being bundled, you can use the build.transpile option in your nuxt.config.ts file. This is especially useful for packages that are only used during development or have different implementations for different environments. Here's how you can configure it:

export default defineNuxtConfig({
  build: {
    transpile: ['postgres']
  }
})

export default defineNuxtConfig({
  build: {
    transpile: ['postgres']
  }
})

This configuration tells Nuxt not to try to import and bundle the 'postgres' library Troubleshooting ESM Issues (https://nuxt.com/docs/guide/concepts/esm#troubleshooting-esm-issues). For your specific case with Postgres for local development and Neon on Cloudflare, you might also need to use aliasing to handle different environments. You can do this in your nuxt.config.ts:

export default defineNuxtConfig({
  alias: {
    'postgres': process.env.NODE_ENV === 'production' 
      ? 'neon-package-name' 
      : 'postgres'
  }
})

export default defineNuxtConfig({
  alias: {
    'postgres': process.env.NODE_ENV === 'production' 
      ? 'neon-package-name' 
      : 'postgres'
  }
})

This setup will use the 'postgres' package during development and the 'neon-package-name' in production Aliasing Libraries (https://nuxt.com/docs/guide/concepts/esm#troubleshooting-esm-issues). For Nitro-specific configurations, you might need to use the nitro.externals option to exclude certain dependencies from the server bundle. However, the exact implementation might depend on your specific setup and the version of Nuxt you're using. Remember that when using different database implementations for development and production, it's crucial to ensure that your code is compatible with both. Using inline import statements, as you mentioned, is a good approach to handle this at runtime. If you're still encountering issues, you might need to look into more advanced configuration options or consider using a Nuxt module to handle the database connections more seamlessly across different environments. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@109997634327986176> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

TitanOP•2mo ago

didn't work unfortunately

TitanOP•2mo ago

using both build: { transpile: ['postgres'], }, and nitro: externals: { external: ['postgres'], },

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How to define external packages in build