.golangci.yml

# This code is licensed under the terms of the MIT license https://opensource.org/license/mit
# Copyright (c) 2021 Marat Reymers

## Golden config for golangci-lint v1.55.2
#
# This is the best config for golangci-lint based on my experience and opinion.
# It is very strict, but not extremely strict.
# Feel free to adapt and change it for your needs.

run:
    # Timeout for analysis, e.g. 30s, 5m.
    # Default: 1m
    timeout: 3m


# This file contains only configs which differ from defaults.
# All possible options can be found here https://github.com/golangci/golangci-lint/blob/master/.golangci.reference.yml
linters-settings:
    testpackage:
        allow-packages:
            - main
            - tests
    cyclop:
        # The maximal code complexity to report.
        # Default: 10
        max-complexity: 30
        # The maximal average package complexity.
        # If it's higher than 0.0 (float) the check is enabled
        # Default: 0.0
        package-average: 10.0

    errcheck:
        # Report about not checking of errors in type assertions: `a := b.(MyStruct)`.
        # Such cases aren't reported by default.
        # Default: false
        check-type-assertions: true

    exhaustive:
        # Program elements to check for exhaustiveness.
        # Default: [ switch ]
        check:
            - switch
            - map

    exhaustruct:
        # List of regular expressions to exclude struct packages and names from check.
        # Default: []
        exclude:
            # std libs
            - "^net/http.Client$"
            - "^net/http.Cookie$"
            - "^net/http.Request$"
            - "^net/http.Response$"
            - "^net/http.Server$"
            - "^net/http.Transport$"
            - "^net/url.URL$"
            - "^os/exec.Cmd$"
            - "^reflect.StructField$"
            # public libs
            - "^github.com/Shopify/sarama.Config$"
            - "^github.com/Shopify/sarama.ProducerMessage$"
            - "^github.com/mitchellh/mapstructure.DecoderConfig$"
            - "^github.com/prometheus/client_golang/.+Opts$"
            - "^github.com/spf13/cobra.Command$"
            - "^github.com/spf13/cobra.CompletionOptions$"
            - "^github.com/stretchr/testify/mock.Mock$"
            - "^github.com/testcontainers/testcontainers-go.+Request$"
            - "^github.com/testcontainers/testcontainers-go.FromDockerfile$"
            - "^golang.org/x/tools/go/analysis.Analyzer$"
            - "^google.golang.org/protobuf/.+Options$"
            - "^gopkg.in/yaml.v3.Node$"

    funlen:
        # Checks the number of lines in a function.
        # If lower than 0, disable the check.
        # Default: 60
        lines: 100
        # Checks the number of statements in a function.
        # If lower than 0, disable the check.
        # Default: 40
        statements: 50
        # Ignore comments when counting lines.
        # Default false
        ignore-comments: true

    gocognit:
        # Minimal code complexity to report.
        # Default: 30 (but we recommend 10-20)
        min-complexity: 20

    gocritic:
        # Settings passed to gocritic.
        # The settings key is the name of a supported gocritic checker.
        # The list of supported checkers can be find in https://go-critic.github.io/overview.
        settings:
            captLocal:
                # Whether to restrict checker to params only.
                # Default: true
                paramsOnly: false
            underef:
                # Whether to skip (*x).method() calls where x is a pointer receiver.
                # Default: true
                skipRecvDeref: false

    gomnd:
        # List of function patterns to exclude from analysis.
        # Values always ignored: `time.Date`,
        # `strconv.FormatInt`, `strconv.FormatUint`, `strconv.FormatFloat`,
        # `strconv.ParseInt`, `strconv.ParseUint`, `strconv.ParseFloat`.
        # Default: []
        ignored-functions:
            - flag.Arg
            - flag.Duration.*
            - flag.Float.*
            - flag.Int.*
            - flag.Uint.*
            - os.Chmod
            - os.Mkdir.*
            - os.OpenFile
            - os.WriteFile
            - prometheus.ExponentialBuckets.*
            - prometheus.LinearBuckets

    gomodguard:
        blocked:
            # List of blocked modules.
            # Default: []
            modules:
                -   github.com/golang/protobuf:
                        recommendations:
                            - google.golang.org/protobuf
                        reason: "see https://developers.google.com/protocol-buffers/docs/reference/go/faq#modules"
                -   github.com/satori/go.uuid:
                        recommendations:
                            - github.com/google/uuid
                        reason: "satori's package is not maintained"
                -   github.com/gofrs/uuid:
                        recommendations:
                            - github.com/google/uuid
                        reason: "gofrs' package is not go module"

    govet:
        # Enable all analyzers.
        # Default: false
        enable-all: true
        # Disable analyzers by name.
        # Run `go tool vet help` to see all analyzers.
        # Default: []
        disable:
            - fieldalignment # too strict
        # Settings per analyzer.
        settings:
            shadow:
                # Whether to be strict about shadowing; can be noisy.
                # Default: false
                strict: true

    nakedret:
        # Make an issue if func has more lines of code than this setting, and it has naked returns.
        # Default: 30
        max-func-lines: 0

    nolintlint:
        # Exclude following linters from requiring an explanation.
        # Default: []
        allow-no-explanation: [ funlen, gocognit, lll ]
        # Enable to require an explanation of nonzero length after each nolint directive.
        # Default: false
        require-explanation: true
        # Enable to require nolint directives to mention the specific linter being suppressed.
        # Default: false
        require-specific: true

    rowserrcheck:
        # database/sql is always checked
        # Default: []
        packages:
            - github.com/jmoiron/sqlx

    tenv:
        # The option `all` will run against whole test files (`_test.go`) regardless of method/function signatures.
        # Otherwise, only methods that take `*testing.T`, `*testing.B`, and `testing.TB` as arguments are checked.
        # Default: false
        all: true


linters:
    disable-all: true
    enable:
        ## enabled by default
        - errcheck # checking for unchecked errors, these unchecked errors can be critical bugs in some cases
        - gosimple # specializes in simplifying a code
        - govet # 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 # is a go vet on steroids, applying a ton of static analysis checks
        - typecheck # like the front-end of a Go compiler, parses and type-checks Go code
        - unused # checks for unused constants, variables, functions and types
        ## disabled by default
        - asasalint # checks for pass []any as any in variadic func(...any)
        - asciicheck # checks that your code does not contain non-ASCII identifiers
        - bidichk # checks for dangerous unicode character sequences
        - bodyclose # checks whether HTTP response body is closed successfully
        - cyclop # checks function and package cyclomatic complexity
        - dupl # tool for code clone detection
        - durationcheck # checks for two durations multiplied together
        - errname # checks that sentinel errors are prefixed with the Err and error types are suffixed with the Error
        - errorlint # finds code that will cause problems with the error wrapping scheme introduced in Go 1.13
        - execinquery # checks query string in Query function which reads your Go src files and warning it finds
        - exhaustive # checks exhaustiveness of enum switch statements
        - exportloopref # checks for pointers to enclosing loop variables
        - forbidigo # forbids identifiers
        - funlen # tool for detection of long functions
        - gocheckcompilerdirectives # validates go compiler directive comments (//go:)
        - gochecknoglobals # checks that no global variables exist
        - gochecknoinits # checks that no init functions are present in Go code
        - gochecksumtype # checks exhaustiveness on Go "sum types"
        - gocognit # computes and checks the cognitive complexity of functions
        - goconst # finds repeated strings that could be replaced by a constant
        - gocritic # provides diagnostics that check for bugs, performance and style issues
        - gocyclo # computes and checks the cyclomatic complexity of functions
        - godot # checks if comments end in a period
        - goimports # in addition to fixing imports, goimports also formats your code in the same style as gofmt
        - gomnd # detects magic numbers
        - gomoddirectives # manages the use of 'replace', 'retract', and 'excludes' directives in go.mod
        - gomodguard # allow and block lists 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
        - lll # reports long lines
        - loggercheck # checks key value pairs for common logger libraries (kitlog,klog,logr,zap)
        - makezero # finds slice declarations with non-zero initial length
        - mirror # reports wrong mirror patterns of bytes/strings usage
        - musttag # enforces field tags in (un)marshaled structs
        - nakedret # finds naked returns in functions greater than a specified function length
        - nestif # reports deeply nested if statements
        - nilerr # finds the code that returns nil even if it checks that the error is not nil
        - nilnil # checks that there is no simultaneous return of nil error and an invalid value
        - noctx # finds sending http request without context.Context
        - nolintlint # reports ill-formed or insufficient nolint directives
        - nonamedreturns # reports all named returns
        - nosprintfhostport # checks for misuse of Sprintf to construct a host with port in a URL
        - perfsprint # checks that fmt.Sprintf can be replaced with a faster alternative
        - predeclared # finds code that shadows one of Go's predeclared identifiers
        - promlinter # checks Prometheus metrics naming via promlint
        - protogetter # reports direct reads from proto message fields when getters should be used
        - reassign # checks that package variables are not reassigned
        - revive # fast, configurable, extensible, flexible, and beautiful linter for Go, drop-in replacement of golint
        - rowserrcheck # checks whether Err of rows is checked successfully
        - sloglint # ensure consistent code style when using log/slog
        - sqlclosecheck # checks that sql.Rows and sql.Stmt are closed
        - stylecheck # is a replacement for golint
        - tenv # detects using os.Setenv instead of t.Setenv since Go1.17
        - testableexamples # checks if examples are testable (have an expected output)
        - testifylint # checks usage of github.com/stretchr/testify
        - testpackage # makes you use a separate _test package
        - tparallel # detects inappropriate usage of t.Parallel() method in your Go test codes
        - unconvert # removes unnecessary type conversions
        - unparam # reports unused function parameters
        - usestdlibvars # detects the possibility to use variables/constants from the Go standard library
        - wastedassign # finds wasted assignment statements
        - whitespace # detects leading and trailing whitespace

        ## you may want to enable
        #- decorder # checks declaration order and count of types, constants, variables and functions
        #- exhaustruct # [highly recommend to enable] checks if all structure fields are initialized
        #- gci # controls golang package import order and makes it always deterministic
        #- ginkgolinter # [if you use ginkgo/gomega] enforces standards of using ginkgo and gomega
        #- godox # detects FIXME, TODO and other comment keywords
        #- goheader # checks is file header matches to pattern
        #- inamedparam # [great idea, but too strict, need to ignore a lot of cases by default] reports interfaces with unnamed method parameters
        #- interfacebloat # checks the number of methods inside an interface
        #- ireturn # accept interfaces, return concrete types
        #- prealloc # [premature optimization, but can be used in some cases] finds slice declarations that could potentially be preallocated
        #- tagalign # checks that struct tags are well aligned
        #- varnamelen # [great idea, but too many false positives] checks that the length of a variable's name matches its scope
        #- wrapcheck # checks that errors returned from external packages are wrapped
        #- zerologlint # detects the wrong usage of zerolog that a user forgets to dispatch zerolog.Event

        ## disabled
        #- containedctx # detects struct contained context.Context field
        #- contextcheck # [too many false positives] checks the function whether use a non-inherited context
        #- depguard # [replaced by gomodguard] checks if package imports are in a list of acceptable packages
        #- dogsled # checks assignments with too many blank identifiers (e.g. x, _, _, _, := f())
        #- dupword # [useless without config] checks for duplicate words in the source code
        #- errchkjson # [don't see profit + I'm against of omitting errors like in the first example https://github.com/breml/errchkjson] checks types passed to the json encoding functions. Reports unsupported types and optionally reports occasions, where the check for the returned error can be omitted
        #- forcetypeassert # [replaced by errcheck] finds forced type assertions
        #- goerr113 # [too strict] checks the errors handling expressions
        #- gofmt # [replaced by goimports] checks whether code was gofmt-ed
        #- gofumpt # [replaced by goimports, gofumports is not available yet] checks whether code was gofumpt-ed
        #- gosmopolitan # reports certain i18n/l10n anti-patterns in your Go codebase
        #- grouper # analyzes expression groups
        #- importas # enforces consistent import aliases
        #- maintidx # measures the maintainability index of each function
        #- misspell # [useless] finds commonly misspelled English words in comments
        #- nlreturn # [too strict and mostly code is not more readable] checks for a new line before return and branch statements to increase code clarity
        #- paralleltest # [too many false positives] detects missing usage of t.Parallel() method in your Go test
        #- tagliatelle # checks the struct tags
        #- thelper # detects golang test helpers without t.Helper() call and checks the consistency of test helpers
        #- wsl # [too strict and mostly code is not more readable] whitespace linter forces you to use empty lines

        ## deprecated
        #- deadcode # [deprecated, replaced by unused] finds unused code
        #- exhaustivestruct # [deprecated, replaced by exhaustruct] checks if all struct's fields are initialized
        #- golint # [deprecated, replaced by revive] golint differs from gofmt. Gofmt reformats Go source code, whereas golint prints out style mistakes
        #- ifshort # [deprecated] checks that your code uses short syntax for if-statements whenever possible
        #- interfacer # [deprecated] suggests narrower interface types
        #- maligned # [deprecated, replaced by govet fieldalignment] detects Go structs that would take less memory if their fields were sorted
        #- nosnakecase # [deprecated, replaced by revive var-naming] detects snake case of variable naming and function name
        #- scopelint # [deprecated, replaced by exportloopref] checks for unpinned variables in go programs
        #- structcheck # [deprecated, replaced by unused] finds unused struct fields
        #- varcheck # [deprecated, replaced by unused] finds unused global variables and constants


issues:
    # Maximum count of issues with the same text.
    # Set to 0 to disable.
    # Default: 3
    max-same-issues: 50

    exclude-rules:
        -   source: "(noinspection|TODO)"
            linters: [ godot ]
        -   source: "//noinspection"
            linters: [ gocritic ]
        -   path: "_test\\.go"
            linters:
                - bodyclose
                - dupl
                - funlen
                - goconst
                - gosec
                - noctx
                - wrapcheck