.golangci.yml

linters-settings:
  depguard:
    # new configuration
    rules:
      logger:
        deny:
          - pkg: "github.com/sirupsen/logrus"
            desc: logging is allowed only by github.com/obalunenko/logger
  dupl:
    threshold: 100
  funlen:
    lines: 100
    statements: 50
  gci:
    # Section configuration to compare against.
    # Section names are case-insensitive and may contain parameters in ().
    # The default order of sections is `standard > default > custom > blank > dot > alias > localmodule`,
    # If `custom-order` is `true`, it follows the order of `sections` option.
    # Default: ["standard", "default"]
    sections:
      - standard                       # Standard section: captures all standard packages.
      - default                        # Default section: contains all imports that could not be matched to another section type.
      - prefix(github.com/obalunenko/advent-of-code) # Custom section: groups all imports with the specified Prefix.
      - blank                          # Blank section: contains all blank imports. This section is not present unless explicitly enabled.
      - dot                            # Dot section: contains all dot imports. This section is not present unless explicitly enabled.
      - alias                          # Alias section: contains all alias imports. This section is not present unless explicitly enabled.
      - localmodule                    # Local module section: contains all local packages. This section is not present unless explicitly enabled.

    # Skip generated files.
    # Default: true
    skip-generated: false

    # Enable custom order of sections.
    # If `true`, make the section order the same as the order of `sections`.
    # Default: false
    custom-order: true

    # Drops lexical ordering for custom sections.
    # Default: false
    no-lex-order: true

  goconst:
    min-len: 2
    min-occurrences: 2
  gocritic:
    enabled-tags:
      - diagnostic
      - experimental
      - opinionated
      - performance
      - style
    disabled-checks:
      - dupImport # https://github.com/go-critic/go-critic/issues/845
      - ifElseChain
      - hugeParam
      - octalLiteral
      - wrapperFunc
  gocyclo:
    min-complexity: 15
  goimports:
    local-prefixes: github.com/obalunenko/advent-of-code
  mnd:
    # List of enabled checks, see https://github.com/tommy-muehle/go-mnd/#checks for description.
    # Default: ["argument", "case", "condition", "operation", "return", "assign"]
    checks:
      - argument
      - case
      - condition
      - operation
      - return
      - assign
    # List of numbers to exclude from analysis.
    # The numbers should be written as string.
    # Values always ignored: "1", "1.0", "0" and "0.0"
    # Default: []
    ignored-numbers: []
    # List of file patterns to exclude from analysis.
    # Values always ignored: `.+_test.go`
    # Default: []
    ignored-files: []
    # List of function patterns to exclude from analysis.
    # Following functions are always ignored: `time.Date`,
    # `strconv.FormatInt`, `strconv.FormatUint`, `strconv.FormatFloat`,
    # `strconv.ParseInt`, `strconv.ParseUint`, `strconv.ParseFloat`.
    # Default: []
    ignored-functions: []

  govet:
    # Disable all analyzers.
    # Default: false
    disable-all: false
    # Enable analyzers by name.
    # (in addition to default:
    #   appends, asmdecl, assign, atomic, bools, buildtag, cgocall, composites, copylocks, defers, directive, errorsas,
    #   framepointer, httpresponse, ifaceassert, loopclosure, lostcancel, nilfunc, printf, shift, sigchanyzer, slog,
    #   stdmethods, stringintconv, structtag, testinggoroutine, tests, timeformat, unmarshal, unreachable, unsafeptr,
    #   unusedresult
    # ).
    # Run `GL_DEBUG=govet golangci-lint run --enable=govet` to see default, all available analyzers, and enabled analyzers.
    # Default: []
    disable:
      - fieldalignment
    enable:
      # Check for missing values after append.
      - appends
      # Report mismatches between assembly files and Go declarations.
      - asmdecl
      # Check for useless assignments.
      - assign
      # Check for common mistakes using the sync/atomic package.
      - atomic
      # Check for non-64-bits-aligned arguments to sync/atomic functions.
      - atomicalign
      # Check for common mistakes involving boolean operators.
      - bools
      # Check //go:build and // +build directives.
      - buildtag
      # Detect some violations of the cgo pointer passing rules.
      - cgocall
      # Check for unkeyed composite literals.
      - composites
      # Check for locks erroneously passed by value.
      - copylocks
      # Check for calls of reflect.DeepEqual on error values.
      - deepequalerrors
      # Report common mistakes in defer statements.
      - defers
      # Check Go toolchain directives such as //go:debug.
      - directive
      # Report passing non-pointer or non-error values to errors.As.
      - errorsas
      # Find calls to a particular function.
      - findcall
      # Report assembly that clobbers the frame pointer before saving it.
      - framepointer
      # Check for mistakes using HTTP responses.
      - httpresponse
      # Detect impossible interface-to-interface type assertions.
      - ifaceassert
      # Check references to loop variables from within nested functions.
      - loopclosure
      # Check cancel func returned by context.WithCancel is called.
      - lostcancel
      # Check for useless comparisons between functions and nil.
      - nilfunc
      # Check for redundant or impossible nil comparisons.
      - nilness
      # Check consistency of Printf format strings and arguments.
      - printf
      # Check for comparing reflect.Value values with == or reflect.DeepEqual.
      - reflectvaluecompare
      # Check for possible unintended shadowing of variables.
      - shadow
      # Check for shifts that equal or exceed the width of the integer.
      - shift
      # Check for unbuffered channel of os.Signal.
      - sigchanyzer
      # Check for invalid structured logging calls.
      - slog
      # Check the argument type of sort.Slice.
      - sortslice
      # Check signature of methods of well-known interfaces.
      - stdmethods
      # Check for string(int) conversions.
      - stringintconv
      # Check that struct field tags conform to reflect.StructTag.Get.
      - structtag
      # Report calls to (*testing.T).Fatal from goroutines started by a test.
      - testinggoroutine
      # Check for common mistaken usages of tests and examples.
      - tests
      # Check for calls of (time.Time).Format or time.Parse with 2006-02-01.
      - timeformat
      # Report passing non-pointer or non-interface values to unmarshal.
      - unmarshal
      # Check for unreachable code.
      - unreachable
      # Check for invalid conversions of uintptr to unsafe.Pointer.
      - unsafeptr
      # Check for unused results of calls to some functions.
      - unusedresult
      # Checks for unused writes.
      - unusedwrite
  lll:
    line-length: 140
  misspell:
    locale: US
  nolintlint:
    allow-leading-space: true # don't require machine-readable nolint directives (i.e. with no leading space)
    allow-unused: false # report any unused nolint directives
    require-explanation: false # don't require an explanation for nolint directives
    require-specific: false # don't require nolint directives to be specific about which linter is being skipped

linters:
  disable-all: true
  enable:
    - bodyclose
    - depguard
    - dogsled
    - dupl
    - errcheck
    - copyloopvar
    - exhaustive
    - funlen
    - gochecknoinits
    - goconst
    - gocritic
    - gocyclo
    - gofmt
    - goimports
    - mnd
    - goprintffuncname
    - gosec
    - gosimple
    - govet
    - ineffassign
    - lll
    - misspell
    - nakedret
    - noctx
    - nolintlint
    - rowserrcheck
    - staticcheck
    - stylecheck
    - typecheck
    - unconvert
    - unparam
    - unused
    - whitespace
    - revive
    - wsl

  # don't enable:
  # - asciicheck
  # - scopelint
  # - gochecknoglobals
  # - gocognit
  # - godot
  # - godox
  # - goerr113
  # - interfacer
  # - maligned
  # - nestif
  # - prealloc
  # - testpackage

issues:
  # Show only new issues: if there are unstaged changes or untracked files,
  # only those changes are analyzed, else only changes in HEAD~ are analyzed.
  # It's a super-useful option for integration of golangci-lint into existing
  # large codebase. It's not practical to fix all existing issues at the moment
  # of integration: much better don't allow issues in new code.
  # Default is false.
  new: false
  # Fix found issues (if it's supported by the linter)
  fix: false
  exclude-files:
    - \.pb\.go$
  exclude-dirs:
    - vendor/
  exclude-use-default: false
  exclude:
    # for "public interface + private struct implementation" cases only!
    - exported func * returns unexported type *, which can be annoying to use
    - should have a package comment, unless it's in another file for this package
  # Excluding configuration per-path, per-linter, per-text and per-source
  exclude-rules:
    # Exclude some linters from running on tests files.
    - path: _test\.go
      linters:
        - gocyclo
        - funlen
        - dupl
        - gosec
    - path: internal/input/
      linters:
        - gocyclo
        - funlen
        - godot
        - godox
        - dupl
        - gofmt
        - gci
        - gofumpt
        - goimports
        - gosimple
    - path: internal/puzzles/constants.go
      linters:
        - revive
    - path: internal/puzzles/solutions/
      linters:
        - gochecknoinits

run:
  issues-exit-code: 0
  tests: true

severity:
  # Set the default severity for issues.
  #
  # If severity rules are defined and the issues do not match or no severity is provided to the rule
  # this will be the default severity applied.
  # Severities should match the supported severity names of the selected out format.
  # - Code climate: https://docs.codeclimate.com/docs/issues#issue-severity
  # - Checkstyle: https://checkstyle.sourceforge.io/property_types.html#SeverityLevel
  # - GitHub: https://help.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-error-message
  # - TeamCity: https://www.jetbrains.com/help/teamcity/service-messages.html#Inspection+Instance
  #
  # `@linter` can be used as severity value to keep the severity from linters (e.g. revive, gosec, ...)
  #
  # Default: ""
  default-severity: error

  # If set to true `severity-rules` regular expressions become case-sensitive.
  # Default: false
  case-sensitive: true

  # When a list of severity rules are provided, severity information will be added to lint issues.
  # Severity rules have the same filtering capability as exclude rules
  # except you are allowed to specify one matcher per severity rule.
  #
  # `@linter` can be used as severity value to keep the severity from linters (e.g. revive, gosec, ...)
  #
  # Only affects out formats that support setting severity information.
  #
  # Default: []
  rules:
    - linters:
        - dupl
      severity: info


# output configuration options
output:
  # colored-line-number|line-number|json|tab|checkstyle|code-climate|junit-xml|github-actions
  # default is "colored-line-number"
  formats:
    - format: colored-line-number
      path: stderr
    - format: checkstyle
      path: linters-report.xml


  # Order to use when sorting results.
  # Require `sort-results` to `true`.
  # Possible values: `file`, `linter`, and `severity`.
  #
  # If the severity values are inside the following list, they are ordered in this order:
  #   1. error
  #   2. warning
  #   3. high
  #   4. medium
  #   5. low
  # Either they are sorted alphabetically.
  #
  # Default: ["file"]
  sort-order:
    - linter
    - severity
    - file # filepath, line, and column.

  # Show statistics per linter.
  # Default: false
  show-stats: true

  # print lines of code with issue, default is true
  print-issued-lines: true

  # print linter name in the end of issue text, default is true
  print-linter-name: true

  # make issues output unique by line, default is true
  uniq-by-line: true

  # add a prefix to the output file references; default is no prefix
  path-prefix: ""

  # sorts results by: filepath, line and column
  sort-results: true