Add a way to generate a metafile for bundle analsys

[danielo515]

Body

Summary

I want to explore why my files are bundled the way they are and see what is being included.

Background & Motivation

I want to see what is being sent to my FE and why

Goals

The ideal solution will be a way to say the uderlying esbuild to generate a metafile. But they don't offer such api, you have to get the result from the build and save the metadata included in the result to a JSON file. I tried using the advanced astro build, but that is not working.

Example

  vite: {
    build: {
      sourcemap: true,
    },
    optimizeDeps: {
      exclude: ["oslo"],
    },
    define: {
      VERSION: JSON.stringify(version),
    },
    metafile: './metafile.js'
  }