Rollup Version Compatibility Best Practices

Rollup controls the generation logic of output versions through configuration files (such as rollup.config.js), supporting on-demand construction of different versioned bundling results. Developers can implement version management in the following ways:

Build Mode Differentiation
Use the rollup -c command to specify build modes, for example:
```
rollup -c production -d dist/prod
rollup -c development -d dist/develop
```
Differences in modes directly affect the structure of output files and dependency handling methods, ensuring compatibility across different environments.

Version Tag Generation
Automatically generate version tags via the rollup-plugin-json5 plugin, for example:

import json5 from 'rollup-plugin-json5';
export default {
  plugins: [
    json5({
      fileName: 'version.json',
      content: JSON.stringify({
        version: '1.0.0',
        date: new Date()
      })
    })
  ]
};

This mechanism ensures that output files contain version information, facilitating subsequent tracing and debugging.

Dependency Version Locking
Explicitly specify dependency versions in rollup.config.js to avoid compatibility issues caused by updates to upstream libraries:

import { defineConfig } from 'rollup';
import resolve from 'rollup-plugin-resolve';
import json5 from 'rollup-plugin-json5';

export default defineConfig({
  plugins: [
    resolve({
      extensions: ['.js', '.json']
    }),
    json5({
      fileName: 'version.json'
    })
  ],
  resolve: {
    dependencies: {
      'react': '18.2.0',
      'react-dom': '18.2.0'
    }
  }
});

Deployment Practices

Production environment deployment must ensure that the Rollup output version is highly consistent with dependency library versions. Specific practices include:

CI/CD Pipeline Integration
Configure automated build processes in GitHub Actions or GitLab CI, for example:

steps:
  - name: Checkout code
    uses: actions/checkout@v2

  - name: Build production version
    run: npx rollup -c production -d dist/prod

  - name: Deploy
    uses: azure/arm-template@v1
    with:
      template: 'https://raw.githubusercontent.com/rollup/rollup/master/examples/azure-deploy.yaml'

Containerized Deployment
Containerize Rollup output using Docker to ensure environmental consistency:
```
FROM node:18-slim
WORKDIR /app
COPY . .
RUN npm install
CMD ["node", "dist/production/index.js"]
```

Version Isolation Strategy
Dynamically replace production environment dependencies using the rollup-plugin-replace plugin:

import replace from 'rollup-plugin-replace';
export default {
  plugins: [
    replace({
      'process.env.NODE_ENV': JSON.stringify('production')
    })
  ]
};

Common Issues and Solutions

Version Conflicts
Issue: Errors caused by inconsistent dependency versions across different environments.
Solution: Explicitly specify dependency versions in rollup.config.js and use the rollup-plugin-resolve plugin to force version locking.
Build Failures
Issue: Configuration files are not loaded correctly or plugins are missing.
Solution: Verify that plugins are installed, ensure the configuration file path is correct, and use rollup -v to debug build logs.
Deployment Inconsistencies
Issue: CI/CD processes fail to correctly capture version changes.
Solution: Add version check logic to deployment scripts, for example:
```
if [ "$TRAVIS_BRANCH" == "main" ]; then
  npm install --production
fi
```

Best Practices Summary

Rollup version control requires combining build modes, dependency locking, and CI/CD processes to achieve stable outputs. Production deployments should ensure environmental consistency through containerization, automated builds, and version isolation. Developers must continuously monitor version changes and leverage Rollup's plugin ecosystem to optimize the build process, ultimately achieving an efficient and reliable delivery system.