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Bazel vs Lerna: What are the differences?

Introduction:

Bazel and Lerna are both build tools used in software development to streamline processes and improve efficiency in managing dependencies and builds. However, they have key differences that cater to different needs of developers and projects.

  1. Language Support: Bazel primarily focuses on supporting multiple languages like C++, Java, and Python, whereas Lerna is more tailored towards JavaScript and Node.js projects. This difference in language support makes Bazel more versatile for projects using a variety of languages, while Lerna is ideal for JavaScript-centric projects.

  2. Monorepo Handling: Bazel excels in managing monorepos efficiently by providing tools for scalability and performance optimization when handling large codebases. On the other hand, Lerna is specifically designed to work with monorepos in JavaScript projects, offering features like versioning and package management within a monorepo structure.

  3. Dependency Management: Bazel emphasizes a binary package approach with built-in caching mechanisms to optimize dependency management and build processes, ensuring faster and more reliable builds. In contrast, Lerna focuses on managing dependencies at the package level within a monorepo, with features like independent versioning to handle dependencies across multiple packages.

  4. Scalability: Bazel is preferred for larger-scale projects due to its ability to handle complex build setups and optimize build times, making it suitable for enterprise-level applications. Lerna, while effective for smaller to medium-sized projects, may face limitations in scalability when dealing with significantly large codebases and numerous dependencies.

  5. Build Performance: Bazel prioritizes build performance by leveraging advanced caching strategies and parallel execution of build tasks to minimize build times and improve overall productivity. Lerna, while efficient for JavaScript projects, may not offer the same level of performance optimizations in build processes compared to Bazel, especially in scenarios requiring significant parallel processing.

  6. Community Support: Bazel is backed by Google and has a robust community contributing to its development, ensuring continuous improvements and updates, as well as strong documentation and support resources. On the other hand, Lerna has a dedicated community within the JavaScript ecosystem, providing specific support and resources tailored towards JavaScript developers and projects.

In Summary, Bazel and Lerna differ in terms of language support, monorepo handling, dependency management, scalability, build performance, and community support, catering to diverse project requirements and development environments.

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Pros of Bazel
Pros of Lerna
  • 28
    Fast
  • 20
    Deterministic incremental builds
  • 17
    Correct
  • 16
    Multi-language
  • 14
    Enforces declared inputs/outputs
  • 10
    High-level build language
  • 9
    Scalable
  • 5
    Multi-platform support
  • 5
    Sandboxing
  • 4
    Dependency management
  • 2
    Windows Support
  • 2
    Flexible
  • 1
    Android Studio integration
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    Cons of Bazel
    Cons of Lerna
    • 3
      No Windows Support
    • 2
      Bad IntelliJ support
    • 1
      Poor windows support for some languages
    • 1
      Constant breaking changes
    • 1
      Learning Curve
    • 1
      Lack of Documentation
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      What is Bazel?

      Bazel is a build tool that builds code quickly and reliably. It is used to build the majority of Google's software, and thus it has been designed to handle build problems present in Google's development environment.

      What is Lerna?

      It is a popular and widely used package written in JavaScript. It optimizes the workflow around managing multi-package repositories with git and npm.

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      What companies use Bazel?
      What companies use Lerna?
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      What tools integrate with Bazel?
      What tools integrate with Lerna?

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      Blog Posts

      Mar 24 2021 at 12:57PM

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