@magic-spells/rollup-plugin-skip-unchanged-output

A Rollup plugin that skips writing files when their content hasn't changed, preventing unnecessary file system operations and reducing build noise.

Installation

npm install @magic-spells/rollup-plugin-skip-unchanged-output --save-dev

Usage

import skipUnchangedOutput from '@magic-spells/rollup-plugin-skip-unchanged-output';

export default {
  // ... your rollup config
  plugins: [
    // ... other plugins
    skipUnchangedOutput({
      logWhenSkipped: false,  // default: false
      logWhenChanged: true    // default: true
    })
  ]
};

Options

• logWhenSkipped (boolean): Whether to log when files are skipped due to unchanged content. Default: false
• logWhenChanged (boolean): Whether to log when files are written due to changed content. Default: true

How it works

The plugin maintains an in-memory cache of file contents. During the generateBundle phase, it compares the current content with the cached version. If the content is identical, the file is removed from the bundle, preventing unnecessary writes to the file system.

This is particularly useful when:

• Working with file watchers that trigger on any file change
• Preventing rate limiting issues with external services (like Shopify CLI)
• Reducing unnecessary I/O operations during development

License

MIT