.golangci.yml

linters:
  disable-all: true
  enable:
    - asasalint
    - asciicheck
    - bidichk
    - bodyclose
    - depguard
    - dogsled
    - errcheck
    - errname
    - errorlint
    - exportloopref
    - gocheckcompilerdirectives
    - gocritic
    - goprintffuncname
    - gosec
    - gosimple
    - govet
    - ineffassign
    - interfacebloat
    - lll
    - makezero
    - nakedret
    - nilerr
    - nolintlint
    - perfsprint
    - prealloc
    - predeclared
    - revive
    - sqlclosecheck
    - staticcheck
    - tenv
    - testifylint
    - tparallel
    - typecheck
    - unconvert
    - unparam
    - unused

linters-settings:
  depguard:
    rules:
      # Name of a rule.
      main:
        # Packages that are not allowed where the value is a suggestion.
        deny:
          - pkg: log
            desc: 'Use injected telegraf.Logger instead'
        # List of file globs that will match this list of settings to compare against.
        # Default: $all
        files:
          - "!**/agent/**"
          - "!**/cmd/**"
          - "!**/config/**"
          - "!**/filter/**"
          - "!**/internal/**"
          - "!**/logger/**"
          - "!**/metric/**"
          - "!**/models/**"
          - "!**/plugins/serializers/**"
          - "!**/scripts/**"
          - "!**/selfstat/**"
          - "!**/testutil/**"
          - "!**/tools/**"
          - "!**/*_test.go"
  errcheck:
    # List of functions to exclude from checking, where each entry is a single function to exclude.
    # See https://github.com/kisielk/errcheck#excluding-functions for details.
    exclude-functions:
      - "(*hash/maphash.Hash).Write"
      - "(*hash/maphash.Hash).WriteByte"
      - "(*hash/maphash.Hash).WriteString"
    check-blank: true
  gocritic:
    # Disable all checks.
    # Default: false
    disable-all: true
    # Which checks should be enabled in addition to default checks; can't be combined with 'disabled-checks'.
    # By default, list of stable checks is used (https://go-critic.github.io/overview#checks-overview).
    # To see which checks are enabled run `GL_DEBUG=gocritic golangci-lint run --enable=gocritic`.
    enabled-checks:
      # diagnostic
      - argOrder
      - badCall
      - badCond
      - badLock
      - badRegexp
      - badSorting
      - builtinShadowDecl
      - caseOrder
      - codegenComment
      - commentedOutCode
      - deferInLoop
      - dupArg
      - deprecatedComment
      - dupBranchBody
      - dupCase
      - dupSubExpr
      - dynamicFmtString
      - emptyDecl
      - evalOrder
      - exitAfterDefer
      - externalErrorReassign
      - filepathJoin
      - flagName
      - mapKey
      - nilValReturn
      - offBy1
      - regexpPattern
      - sloppyReassign
      - sloppyTypeAssert
      - sortSlice
      - sprintfQuotedString
      - sqlQuery
      - syncMapLoadAndDelete
      - truncateCmp
      - uncheckedInlineErr
      - unnecessaryDefer
      - weakCond
      # performance
      - appendCombine
      - equalFold
      - indexAlloc
      - hugeParam
      - preferDecodeRune
      - preferFprint
      - preferStringWriter
      - preferWriteByte
      - rangeExprCopy
      - rangeValCopy
      - sliceClear
      - stringXbytes

    # 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:
      hugeParam:
        # Size in bytes that makes the warning trigger.
        # Default: 80
        sizeThreshold: 512
      rangeValCopy:
        # Size in bytes that makes the warning trigger.
        # Default: 128
        sizeThreshold: 512

  gosec:
    # To select a subset of rules to run.
    # Available rules: https://github.com/securego/gosec#available-rules
    # Default: [] - means include all rules
    includes:
      - G101
      - G102
      - G103
      - G106
      - G107
      - G108
      - G109
      - G110
      - G111
      - G112
      - G114
      - G201
      - G202
      - G203
      - G301
      - G302
      - G303
      - G305
      - G306
      - G401
      - G403
      - G404
      - G501
      - G502
      - G503
      - G505
      - G601
      - G602
      # G104, G105, G113, G204, G304, G307, G402, G504 were not enabled intentionally
    # To specify the configuration of rules.
    config:
      # Maximum allowed permissions mode for os.OpenFile and os.Chmod
      # Default: "0600"
      G302: "0640"
      # Maximum allowed permissions mode for os.WriteFile and ioutil.WriteFile
      # Default: "0600"
      G306: "0640"
  govet:
    settings:
      ## Check the logging function like it would be a printf
      printf:
        # Comma-separated list of print function names to check (in addition to default, see `go tool vet help printf`).
        # Default: []
        funcs:
          - (github.com/influxdata/telegraf.Logger).Debugf
          - (github.com/influxdata/telegraf.Logger).Infof
          - (github.com/influxdata/telegraf.Logger).Warnf
          - (github.com/influxdata/telegraf.Logger).Errorf
          - (github.com/influxdata/telegraf.Logger).Debug
          - (github.com/influxdata/telegraf.Logger).Info
          - (github.com/influxdata/telegraf.Logger).Warn
          - (github.com/influxdata/telegraf.Logger).Error
  lll:
    # Max line length, lines longer will be reported.
    # '\t' is counted as 1 character by default, and can be changed with the tab-width option.
    # Default: 120.
    line-length: 160
    # Tab width in spaces.
    # Default: 1
    tab-width: 4
  nakedret:
    # Make an issue if func has more lines of code than this setting, and it has naked returns.
    # Default: 30
    max-func-lines: 1
  nolintlint:
    # 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
  prealloc:
    # Report pre-allocation suggestions only on simple loops that have no returns/breaks/continues/gotos in them.
    # Default: true
    simple: false
  revive:
    rules:
      - name: argument-limit
        arguments: [ 6 ]
      - name: atomic
      - name: bare-return
      - name: blank-imports
      - name: bool-literal-in-expr
      - name: call-to-gc
      - name: confusing-naming
      - name: confusing-results
      - name: constant-logical-expr
      - name: context-as-argument
      - name: context-keys-type
      - name: deep-exit
      - name: defer
      - name: dot-imports
      - name: duplicated-imports
      - name: early-return
      - name: empty-block
      - name: empty-lines
      - name: error-naming
      - name: error-return
      - name: error-strings
      - name: errorf
      - name: function-result-limit
        arguments: [ 3 ]
      - name: identical-branches
      - name: if-return
      - name: import-shadowing
      - name: increment-decrement
      - name: indent-error-flow
      - name: modifies-parameter
      - name: modifies-value-receiver
      - name: package-comments
      - name: range
      - name: range-val-address
      - name: range-val-in-closure
      - name: receiver-naming
      - name: redefines-builtin-id
      - name: string-of-int
      - name: struct-tag
      - name: superfluous-else
      - name: time-naming
      - name: unconditional-recursion
      - name: unexported-naming
      - name: unnecessary-stmt
      - name: unreachable-code
      - name: unused-parameter
      - name: var-declaration
      - name: var-naming
      - name: waitgroup-by-value
  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
  testifylint:
    # Disable all checkers (https://github.com/Antonboom/testifylint#checkers).
    # Default: false
    disable-all: true
    # Enable checkers by name
    # (in addition to default
    #   blank-import, bool-compare, compares, empty, error-is-as, error-nil, expected-actual, go-require, float-compare,
    #   len, negative-positive, nil-compare, require-error, suite-dont-use-pkg, suite-extra-assert-call, useless-assert
    # ).
    enable:
      - bool-compare
      - compares
      - empty
      - error-is-as
      - error-nil
      - expected-actual
      - len
      - require-error
      - suite-dont-use-pkg
      - suite-extra-assert-call
      - suite-thelper

run:
  # Timeout for analysis, e.g. 30s, 5m.
  # Default: 1m
  timeout: 10m

issues:
  # List of regexps of issue texts to exclude.
  #
  # But independently of this option we use default exclude patterns,
  # it can be disabled by `exclude-use-default: false`.
  # To list all excluded by default patterns execute `golangci-lint run --help`
  #
  # Default: https://golangci-lint.run/usage/false-positives/#default-exclusions
  exclude:
    # revive:var-naming
    - don't use an underscore in package name
    # EXC0001 errcheck: Almost all programs ignore errors on these functions, and in most cases it's ok
    - Error return value of .((os\.)?std(out|err)\..*|.*Close.*|.*Flush|.*Disconnect|.*Clear|os\.Remove(All)?|.*print(f|ln)?|os\.(Un)?Setenv). is not checked
    # EXC0013 revive: Annoying issue about not having a comment. The rare codebase has such comments
    - package comment should be of the form "(.+)...
    # EXC0015 revive: Annoying issue about not having a comment. The rare codebase has such comments
    - should have a package comment
    # nolintlint: directive `//nolint:errcheck` is unused for linter "errcheck"
    # temporary while these are being fixed
    - directive `//nolint:errcheck //.*` is unused for linter "errcheck"

  # Excluding configuration per-path, per-linter, per-text and per-source
  exclude-rules:
    - path: plugins/parsers/influx
      linters:
        - govet

    - path: cmd/telegraf/(main|printer|cmd_plugins).go
      text: "Error return value of `outputBuffer.Write` is not checked" #errcheck

    - path: plugins/*
      linters:
        - errcheck # temporary as this linter is gradually being applied across the codebase

    - path: _test\.go
      text: "Potential hardcoded credentials" #gosec:G101

    - path: _test\.go
      text: "Use of weak random number generator" #gosec:G404

  # Independently of option `exclude` we use default exclude patterns,
  # it can be disabled by this option.
  # To list all excluded by default patterns execute `golangci-lint run --help`.
  # Default: true
  exclude-use-default: false

  # Which dirs to exclude: issues from them won't be reported.
  # Can use regexp here: `generated.*`, regexp is applied on full path,
  # including the path prefix if one is set.
  # Default dirs are skipped independently of this option's value (see exclude-dirs-use-default).
  # "/" will be replaced by current OS file path separator to properly work on Windows.
  # Default: []
  exclude-dirs:
    - assets
    - docs
    - etc

  # Which files to exclude: they will be analyzed, but issues from them won't be reported.
  # There is no need to include all autogenerated files,
  # we confidently recognize autogenerated files.
  # If it's not, please let us know.
  # "/" will be replaced by current OS file path separator to properly work on Windows.
  # Default: []
  exclude-files:
    - plugins/parsers/influx/machine.go*

  # Maximum issues count per one linter.
  # Set to 0 to disable.
  # Default: 50
  max-issues-per-linter: 0

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

# output configuration options
output:
  # The formats used to render issues.
  # Formats:
  # - `colored-line-number`
  # - `line-number`
  # - `json`
  # - `colored-tab`
  # - `tab`
  # - `html`
  # - `checkstyle`
  # - `code-climate`
  # - `junit-xml`
  # - `github-actions`
  # - `teamcity`
  # - `sarif`
  # Output path can be either `stdout`, `stderr` or path to the file to write to.
  #
  # For the CLI flag (`--out-format`), multiple formats can be specified by separating them by comma.
  # The output can be specified for each of them by separating format name and path by colon symbol.
  # Example: "--out-format=checkstyle:report.xml,json:stdout,colored-line-number"
  # The CLI flag (`--out-format`) override the configuration file.
  #
  # Default:
  #   formats:
  #     - format: colored-line-number
  #       path: stdout
  formats:
    - format: tab
      path: stdout

  # Make issues output unique by line.
  # Default: true
  uniq-by-line: false

  # Sort results by the order defined in `sort-order`.
  # Default: false
  sort-results: true

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