---
version: "2"
linters:
  default: none
  enable: # please keep this alphabetized
    - errorlint
    - goheader
    - govet
    - ineffassign
    - misspell
    - nakedret
    - revive
    - staticcheck
    - testifylint
    - thelper
    - unconvert # Remove unnecessary type conversions
    - unparam
    - unused
    - usestdlibvars
    - usetesting
    - whitespace
  settings:
    goheader:
      values:
        regexp:
          ORIGINAL_YEAR: 20[1-2][0-9]
      template: |-
        Copyright {{ORIGINAL_YEAR}} The etcd Authors

        Licensed under the Apache License, Version 2.0 (the "License");
        you may not use this file except in compliance with the License.
        You may obtain a copy of the License at

            http://www.apache.org/licenses/LICENSE-2.0

        Unless required by applicable law or agreed to in writing, software
        distributed under the License is distributed on an "AS IS" BASIS,
        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
        See the License for the specific language governing permissions and
        limitations under the License.
    govet:
      enable:
        - shadow
    nakedret:
      # Align with https://github.com/alexkohler/nakedret/blob/v1.0.2/cmd/nakedret/main.go#L10
      max-func-lines: 5
    revive:
      confidence: 0.8
      rules:
        - name: blank-imports
        - name: context-as-argument
        - name: context-keys-type
        - name: dot-imports
        - name: early-return
          arguments:
            - preserveScope
        - name: error-return
        - name: error-naming
        - name: error-strings
        - name: errorf
        - name: if-return
        - name: increment-decrement
        - name: indent-error-flow
        - name: package-comments
        - name: range
        - name: receiver-naming
        - name: superfluous-else
          arguments:
            - preserveScope
        - name: time-naming
        - name: unnecessary-stmt
        - name: use-any
        - name: var-declaration
        - name: var-naming
          arguments:
            # The following is the configuration for var-naming rule, the first element is the allow list and the second element is the deny list.
            - [] # AllowList: leave it empty to use the default (empty, too). This means that we're not relaxing the rule in any way, i.e. elementId will raise a violation, it should be elementID, refer to the next line to see the list of denied initialisms.
            # DenyList: Add GRPC and WAL to strict the rule not allowing instances like Wal or Grpc. The default values are located at commonInitialisms, refer to: https://github.com/mgechev/revive/blob/v1.3.7/lint/utils.go#L93-L133.
            - - GRPC
              - WAL
            # Disable checks on package names that collide with Go standard library packages. See example error:
            #    var-naming: avoid package names that conflict with Go standard library package names (revive)
            - - skip-package-name-collision-with-go-std: true
        - name: exported
          disabled: true
        - name: unexported-return
          disabled: true
    staticcheck:
      checks:
        - all
        - -SA2002 # TODO(fix) Called testing.T.FailNow or SkipNow in a goroutine, which isn’t allowed
        - -QF1001 # TODO(fix) Apply De Morgan’s law
        - -QF1002 # TODO(fix) Convert untagged switch to tagged switch
        - -QF1003 # TODO(fix) Convert if/else-if chain to tagged switch
        - -QF1004 # TODO(fix) Use strings.ReplaceAll instead of strings.Replace with n == -1
        - -QF1006 # TODO(fix) Lift if+break into loop condition
        - -QF1008 # TODO(fix) Omit embedded fields from selector expression
        - -QF1009 # TODO(fix) Use time.Time.Equal instead of == operator
        - -QF1012 # TODO(fix) Use fmt.Fprintf(x, ...) instead of x.Write(fmt.Sprintf(...))
        - -ST1003 # TODO(fix) Poorly chosen identifier
        - -ST1005 # TODO(fix) Drop unnecessary use of the blank identifier
        - ST1019 # Importing the same package multiple times.
    testifylint:
      enable-all: true
      formatter:
        # Require f-assertions (e.g. assert.Equalf) if a message is passed to the assertion, even if
        # there is no variable-length variables, i.e. require require.NoErrorf for both cases below:
        # require.NoErrorf(t, err, "whatever message")
        # require.NoErrorf(t, err, "whatever message: %v", v)
        #
        # Note from golang programming perspective, we still prefer non-f-functions (i.e. fmt.Print)
        # to f-functions (i.e. fmt.Printf) when there is no variable-length parameters. It's accepted
        # to always require f-functions for stretchr/testify, but not for golang standard lib.
        # Also refer to https://github.com/etcd-io/etcd/pull/18741#issuecomment-2422395914
        require-f-funcs: true
    thelper:
      test:
        first: false
        begin: false
      fuzz:
        first: false
        begin: false
      benchmark:
        first: false
        begin: false
      tb:
        first: false
        begin: false
    usetesting:
      os-mkdir-temp: false
  exclusions:
    generated: lax
    presets:
      - comments
      - common-false-positives
      - legacy
      - std-error-handling
    rules:
      - linters:
          - ineffassign
        path: conversion\.go
      - linters:
          - staticcheck
        text: S1000
      - linters:
          - revive
        text: 'var-naming: avoid meaningless package names'
    paths:
      - ^zz_generated.*
      - third_party$
      - builtin$
      - examples$
issues:
  max-same-issues: 0
formatters:
  enable:
    - gci
    - gofmt
    - goimports
  settings: # please keep this alphabetized
    gci:
      sections:
        - standard
        - default
        - prefix(go.etcd.io)
    goimports:
      local-prefixes:
        - go.etcd.io # Put imports beginning with prefix after 3rd-party packages.
  exclusions:
    generated: lax
    paths:
      - ^zz_generated.*
      - third_party$
      - builtin$
      - examples$