Programming language: Go
License: MIT License
Tags: Utilities     Productivity     Command Line     Go Tools     Tools     Go     Golang     Linter     Check     Quality    
Latest version: v0.5.2

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Build Status Awesome Go Report Card coverage PRs Welcome

Highly extensible Go source code linter providing checks currently missing from other linters.


There is never too much static code analysis. Try it out.


  • Almost 100 diagnostics that check for bugs, performance and style issues
  • Extensible without re-compilation with dynamic rules
  • Includes #opinionated checks with very strict and specific requirements
  • Self-documented: gocritic doc <checkname> gives a checker description


The latest documentation is available at go-critic.com.


For most users, using go-critic under golangci-lint is enough.

Precompiled go-critic binaries can be found at releases page.

Instructions below show how to build go-critic from sources.

GO111MODULE=on go get -v -u github.com/go-critic/go-critic/cmd/gocritic

as of go 1.18, use go install instead

go install -v github.com/go-critic/go-critic/cmd/gocritic@latest

If the command above does not work, you can try cloning this repository under your GOPATH and run make gocritic.

On macOS, you can also install go-critic using MacPorts: sudo port install go-critic


Be sure gocritic executable is under your $PATH.

Usage of gocritic: gocritic [sub-command] [sub-command args...] Run gocritic without arguments to get help output.

Supported sub-commands:
    check - run linter over specified targets
        $ gocritic check -help
        $ gocritic check -v -enable='paramTypeCombine,unslice' strings bytes
        $ gocritic check -v -enable='#diagnostic' -disable='#experimental,#opinionated' ./...
    version - print linter version
        $ gocritic version
    doc - get installed checkers documentation
        $ gocritic doc -help
        $ gocritic doc
        $ gocritic doc checkerName

check sub-command examples:

# Runs all stable checkers on `fmt` package:
gocritic check fmt

# Run all stable checkers on `pkg1` and `pkg2`
gocritic check pkg1 pkg2

# Run all stable checkers on `fmt` package and configure rangeExprCopy checker
gocritic check [email protected] 128 fmt

# Runs specified checkers on `fmt` package:
gocritic check -enable elseif,paramName fmt

# Run all stable checkers on current dir and all its children recursively:
gocritic check ./...

# Like above, but without `appendAssign` check:
gocritic check -disable=appendAssign ./...

# Run all stable checkers on `foo.go` file:
gocritic check foo.go

# Run stable diagnostics over `strings` package:
gocritic check -enable='#diagnostic' -disable='#experimental' strings

# Run all stable and non-opinionated checks:
gocritic check -enableAll -disable='#experimental,#opinionated' ./src/...

To get a list of available checker parameters, run gocritic doc <checkerName>.

In place of a single name, tag can be used. Tag is a named checkers group.


  • #diagnostic - kind of checks that detect various errors in code
  • #style - kind of checks that find style issues in code
  • #performance - kind of checks that detect potential performance issues in code
  • #experimental - check is under testing and development. Disabled by default
  • #opinionated - check can be unwanted for some people. Disabled by default
  • #security - kind of checks that find security issues in code. Disabled by default and empty, so will fail if enabled.


This project aims to be contribution-friendly.

Our chats: English or Russian (Telegram website)

We're using an optimistic merging strategy most of the time. In short, this means that if your contribution has some flaws, we can still merge it and then fix them by ourselves. Experimental and work-in-progress checkers are isolated, so nothing bad will happen.

Code style is the same as in Go project, see CodeReviewComments.

See [CONTRIBUTING.md](CONTRIBUTING.md) for more details. It also describes how to develop a new checker for the linter.