A Go tool that calculates cyclomatic complexity of functions to identify code needing refactoring.
Gocyclo is a Go command-line tool that calculates the cyclomatic complexity of functions in Go source code. It helps developers identify functions with high complexity that may be hard to test, understand, or maintain, enabling targeted refactoring to improve code quality. The tool provides metrics like threshold filtering, top-N reporting, and average complexity calculations.
Go developers and teams focused on code quality, maintainability, and refactoring, particularly those implementing static analysis or code review processes.
Developers choose Gocyclo for its simplicity, fast analysis, and actionable insights into code complexity without heavy dependencies. It integrates easily into CI/CD pipelines and supports ignoring specific functions or files for flexible usage.
Calculate cyclomatic complexities of functions in Go source code.
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Gocyclo installs quickly via go install and runs instantly on Go source files, providing complexity scores without heavy dependencies or configuration, as emphasized in its simple usage examples.
The -over flag triggers a non-zero exit code when functions exceed a set complexity, making it easy to integrate into CI/CD pipelines for automated quality enforcement, as described in the flags section.
Supports ignoring files with regex via -ignore and individual functions with //gocyclo:ignore directives, allowing targeted analysis without modifying code structure, demonstrated in the README examples.
The -top flag highlights the most complex functions, helping teams quickly identify and address high-risk areas, which aligns with the tool's philosophy of improving maintainability.
Gocyclo only calculates cyclomatic complexity, ignoring other code quality metrics like cognitive complexity, code duplication, or security issues, which limits its usefulness for comprehensive analysis.
Output is plain text with minimal formatting, lacking JSON or structured data options, making it harder to integrate with advanced reporting tools or custom dashboards.
While it identifies complex functions, Gocyclo doesn't provide suggestions on how to refactor them, leaving developers to rely on external resources or experience for improvements.