Linting in Code Reviews

Computer code analyst

You likely use many programming languages often in your work as a developer. However, how can you guarantee that your code is coherent, easy to understand, and devoid of errors? Including a linter in the integrated development environment (IDE) is one approach. Linters are tools that scan a code for syntax mistakes, formatting violations, code smells, and security threats, among other possible problems.

No matter how long you’ve been a developer or how new you are to the field, knowing how important linters are to the development process makes the difference between good and great code. Our post will teach you how to utilize a linter to significantly enhance your productivity and the quality of the final product.

What is a Linter?

A linter is a software program that scans a code and reports any problems it finds. The original Lint tool, which was created to inspect C code for errors and inefficiencies, is the inspiration for its name. Nowadays, linters are available for almost all programming languages and frameworks. For example, Ruby has RuboCop, Python has Pylint, and JavaScript has ESLint. The linter may be used with an integrated development environment (IDE) alone or as a build system or continuous integration pipeline component.

A linter checks a code for compliance with standards and regulations by comparing the results to what you anticipate. It may come with its own set of rules, or you and a team alter them to fit your needs. For instance, a linter can be set up to enforce some standards, such as a certain amount of white space, naming conventions, or the use of comments. In addition, it helps you find typical mistakes like undefined functions, variables that aren’t in use, and missing semicolons. Code and cyclomatic complexity and coverage are more sophisticated tests certain linters do.

The Role of Linters in Code Review

There are several benefits to using a linter for both you and your project. An automatic method for checking code for stylistic mistakes, programming errors, and other sorts of flaws that might lead to uneven quality is provided by linting, which plays a critical part in the review process. Any software development project would benefit greatly from the automatic feedback to keep code quality and consistency at a high level. Here’s an exploration of how linters can augment manual code reviews:

1.   Automated Feedback

As soon as code is created or committed, linters provide developers with rapid feedback by indicating bugs. Before it reaches the code review phase, the immediate feedback system helps find and fix basic issues. It frees up human reviewers to concentrate on complicated and crucial parts that automated tools could miss. Plus, they help developers work efficiently by giving them critical feedback in real-time when problems emerge.

2.   Consistency Across Codebases

Linters help to make sure codebases stay clean, structured, and legible no matter how many people contribute by enforcing a consistent coding style and set of rules. Moreover, consistency is vital for big projects or companies with a high turnover rate because it makes it simpler to onboard new engineers and maintain and update code.

3.   Integration with Development Environments

There are a number of linters compatible with CI/CD pipelines and development environments. The integration streamlines the code review process and guarantees that it follows the project’s standards before it is merged into the main codebase by automatically checking code at different stages of the development process.

4.   Directions for the Most Effective Methods

Linters do more than just highlight mistakes, they help point developers in the direction of code best practices. Many linters are configurable and can be tailored to enforce specific coding standards and best practices relevant to the project or the programming language in use. What is more, this educational aspect helps improve the overall skill set of the development team over time.

5.   Augment Manual Code Reviews

While linters catch a lot of issues, they are not a substitute for manual code reviews. Instead, they augment the manual review process by taking care of the more mundane, repetitive aspects of code checking. This allows human reviewers to dedicate their time and attention to analyzing logic, architecture, and design patterns – areas where human judgment is irreplaceable.

6.   Personalization and Adaptability

Linters are quite adaptable, so groups are able to build on top of pre-existing standards to make them work for their specific projects. Thanks to its adaptability, the linting rules may change along with the project, keeping the tool up-to-date and usable all the way through.

7.   Early Detection of Potential Issues

Linters help in the early detection of potential issues that might lead to bugs or performance problems. By catching them early in the development cycle, linters help reduce the cost and effort required for fixing bugs later on. This proactive approach to quality assurance contributes to an efficient and reliable development process.


With the ability to improve the human code review process, linters have become an integral part of the contemporary software development workflow. In addition, they help foster a culture of quality and continual progress within development teams. While linters automate the identification of common errors and enforce consistency, developers and reviewers become more productive and concentrate on human-input-required elements of code quality, ultimately leading to better software.

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