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vite-plugin-entries-build-cache is a Vite plugin that provides a cache mechanism to filter the input package entry based on the verification of project file changes to speed up the multi-entry build process.

Note: This plugin is only applicable to multi-entry projects and only takes effect when build.emptyOutDir in the vite configuration needs to be false.

npm i vite-plugin-entries-build-cache -D

yarn add vite-plugin-entries-build-cache -D

Register it as a Vite plugin:

// vite.config.js
import entriesBuildCache from 'vite-plugin-entries-build-cache'
import { resolve } from 'path'

export default {
  plugins: [
    entriesBuildCache({
      entryRootPath: resolve(process.cwd(), './src/pages')
    })
  ]
}

Attention: Correctly configuring the exclude parameter can effectively reduce the file diff time. Because the plugin is diffing all files under rootPath, not relying on git, so if there are a large number of files under rootPath and these files will not affect the entry files, such as package-lock.json, then these files can be configured to exclude to reduce diff time.

├── src
│   ├── components
│   ├── pages
│   │   ├── index
│   │   │   ├── index.html
│   │   │   ├── main.ts
│   │   │   └── index.vue
│   └── └── about
│           ├── index.html
│           ├── main.ts
│           └── index.vue
├── .gitignore
├── vite.config.js
├── package-lock.json
└── package.json

// vite.config.js
import entriesBuildCache from 'vite-plugin-entries-build-cache'
import { defineConfig } from 'vite'
import { resolve } from 'path'

export default defineConfig({
  plugins: [
    entriesBuildCache({
      entryRootPath: resolve(process.cwd(), './src/pages'), // The parent folder path of the multi-entry folder. The plugin will filter the input entry based on the file changes under this path
      rootPath: process.cwd(), // Project root path
      exclude: ['.gitignore', 'package-lock.json']
    })
  ],
  build: {
    emptyOutDir: false, // This configuration needs to be false
    rollupOptions: {
      input: {
        index: resolve(process.cwd(), './src/pages/index/index.html'),
        about: resolve(process.cwd(), './src/pages/about/index.html')
      }
    }
  }
})

1. When editing the file under entryRootPath that is ./src/pages, the filter mechanism will be triggered:

modified:   src/pages/about/index.html

When building, only the entry under the changed directory will be packaged, that is, the about entry, which is equivalent to:

input: {
  about: resolve(process.cwd(), './src/pages/about/index.html')
}

1. When editing the file in rootPath, but not in entryRootPath, the filter mechanism will not be triggered:

modified:   vite.config.js

When building, all entry files will be packaged, because the plugin cannot determine which entry files will be affected by the changes:

input: {
  index: resolve(process.cwd(), './src/pages/index/index.html'),
  about: resolve(process.cwd(), './src/pages/about/index.html')
}