golangci-lint

Linters

To see a list of supported linters and which linters are enabled/disabled:

golangci-lint help linters

Enabled By Default Linters

  • deadcode - Finds unused code
  • errcheck - Errcheck is a program for checking for unchecked errors in go programs. These unchecked errors can be critical bugs in some cases
  • gosimple - Linter for Go source code that specializes in simplifying a code
  • govet - Vet examines Go source code and reports suspicious constructs, such as Printf calls whose arguments do not align with the format string
  • ineffassign - Detects when assignments to existing variables are not used
  • staticcheck - Staticcheck is a go vet on steroids, applying a ton of static analysis checks
  • structcheck - Finds unused struct fields
  • typecheck - Like the front-end of a Go compiler, parses and type-checks Go code
  • unused - Checks Go code for unused constants, variables, functions and types
  • varcheck - Finds unused global variables and constants

Disabled By Default Linters (-E/--enable)

  • asciicheck - Simple linter to check that your code does not contain non-ASCII identifiers
  • bodyclose - checks whether HTTP response body is closed successfully
  • depguard - Go linter that checks if package imports are in a list of acceptable packages
  • dogsled - Checks assignments with too many blank identifiers (e.g. x, , , _, := f())
  • dupl - Tool for code clone detection
  • errorlint - go-errorlint is a source code linter for Go software that can be used to find code that will cause problemswith the error wrapping scheme introduced in Go 1.13.
  • exhaustive - check exhaustiveness of enum switch statements
  • exhaustivestruct - Checks if all struct's fields are initialized
  • exportloopref - checks for pointers to enclosing loop variables
  • funlen - Tool for detection of long functions
  • gci - Gci control golang package import order and make it always deterministic.
  • gochecknoglobals - check that no global variables exist

This analyzer checks for global variables and errors on any found.

A global variable is a variable declared in package scope and that can be read and written to by any function within the package. Global variables can cause side effects which are difficult to keep track of. A code in one function may change the variables state while another unrelated chunk of code may be effected by it.

  • gochecknoinits - Checks that no init functions are present in Go code
  • gocognit - Computes and checks the cognitive complexity of functions
  • goconst - Finds repeated strings that could be replaced by a constant
  • gocritic - The most opinionated Go source code linter
  • gocyclo - Computes and checks the cyclomatic complexity of functions
  • godot - Check if comments end in a period
  • godox - Tool for detection of FIXME, TODO and other comment keywords
  • goerr113 - Golang linter to check the errors handling expressions
  • gofmt - Gofmt checks whether code was gofmt-ed. By default this tool runs with -s option to check for code simplification
  • gofumpt - Gofumpt checks whether code was gofumpt-ed.
  • goheader - Checks is file header matches to pattern
  • goimports - Goimports does everything that gofmt does. Additionally it checks unused imports
  • golint - Golint differs from gofmt. Gofmt reformats Go source code, whereas golint prints out style mistakes
  • gomnd - An analyzer to detect magic numbers.
  • gomodguard - Allow and block list linter for direct Go module dependencies. This is different from depguard where there are different block types for example version constraints and module recommendations.
  • goprintffuncname - Checks that printf-like functions are named with f at the end
  • gosec - Inspects source code for security problems
  • interfacer - Linter that suggests narrower interface types
  • lll - Reports long lines
  • maligned - Tool to detect Go structs that would take less memory if their fields were sorted
  • misspell - Finds commonly misspelled English words in comments
  • nakedret - Finds naked returns in functions greater than a specified function length
  • nestif - Reports deeply nested if statements
  • nlreturn - nlreturn checks for a new line before return and branch statements to increase code clarity
  • noctx - noctx finds sending http request without context.Context
  • nolintlint - Reports ill-formed or insufficient nolint directives
  • paralleltest - paralleltest detects missing usage of t.Parallel() method in your Go test
  • prealloc - Finds slice declarations that could potentially be preallocated
  • rowserrcheck - checks whether Err of rows is checked successfully
  • scopelint - Scopelint checks for unpinned variables in go programs
  • sqlclosecheck - Checks that sql.Rows and sql.Stmt are closed.
  • stylecheck - Stylecheck is a replacement for golint
  • testpackage - linter that makes you use a separate _test package
  • tparallel - tparallel detects inappropriate usage of t.Parallel() method in your Go test codes
  • unconvert - Remove unnecessary type conversions
  • unparam - Reports unused function parameters
  • whitespace - Tool for detection of leading and trailing whitespace
  • wrapcheck - Checks that errors returned from external packages are wrapped
  • wsl - Whitespace Linter - Forces you to use empty lines!
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