Lerna vs Rome : What are the differences?

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1. Project Scope and Focus: Lerna primarily focuses on managing multiple packages within a repository, enabling versioning and cross-linking dependencies, while Rome is designed as an all-in-one tool for JavaScript and TypeScript development, encompassing a compiler, linter, bundler, and formatter in a single package.

2. Build System: Lerna does not include a built-in build system but provides the flexibility to integrate with other build tools, whereas Rome offers a comprehensive build system within its toolchain, enabling developers to compile and bundle code seamlessly.

3. Supported Languages: Lerna primarily targets JavaScript and its ecosystem, whereas Rome supports both JavaScript and TypeScript, offering additional features tailored for TypeScript developers, such as type checking and TypeScript-specific linting rules.

4. Publishing Packages: Lerna simplifies the process of publishing packages to package registries like npm, managing versions and ensuring consistent dependencies across packages, while Rome does not have built-in features for package publishing and versioning.

5. Community and Ecosystem: Lerna has a more established community and ecosystem, with plugins and community-driven support for various use cases, while Rome is a newer entrant with a growing community but may have limited third-party integrations and community resources.

6. Development Philosophy: Lerna follows a modular approach, allowing developers to pick and choose the functionalities they need, whereas Rome promotes a holistic development experience, aiming to provide a unified solution for various aspects of JavaScript and TypeScript development.

In Summary, Lerna and Rome differ in their focus on package management and all-in-one development tooling, build system integration, language support, package publishing capabilities, community size, and development philosophy.