.credo.exs

%{
  configs: [
    %{
      name: "default",
      files: %{
        included: [
          "lib/",
          "test/"
        ],
        excluded: [~r"/_build/", ~r"/deps/", ~r"/node_modules/"]
      },
      plugins: [],
      requires: [],
      strict: true,
      parse_timeout: 5000,
      color: false,
      checks: [
        # Consistency Checks
        {Credo.Check.Consistency.ExceptionNames, []},
        {Credo.Check.Consistency.LineEndings, []},
        {Credo.Check.Consistency.ParameterPatternMatching, []},
        {Credo.Check.Consistency.SpaceAroundOperators, []},
        {Credo.Check.Consistency.SpaceInParentheses, []},
        {Credo.Check.Consistency.TabsOrSpaces, []},

        # Design Checks
        {Credo.Check.Design.AliasUsage, [priority: :low, if_nested_deeper_than: 2, if_called_more_often_than: 0]},
        {Credo.Check.Design.TagTODO, [exit_status: 2]},
        {Credo.Check.Design.TagFIXME, []},

        # Readability Checks
        {Credo.Check.Readability.AliasOrder, false},
        {Credo.Check.Readability.FunctionNames, []},
        {Credo.Check.Readability.LargeNumbers, []},
        {Credo.Check.Readability.MaxLineLength, [priority: :low, max_length: 120]},
        {Credo.Check.Readability.ModuleAttributeNames, []},
        {Credo.Check.Readability.ModuleDoc, []},
        {Credo.Check.Readability.ModuleNames, []},
        {Credo.Check.Readability.ParenthesesInCondition, []},
        {Credo.Check.Readability.ParenthesesOnZeroArityDefs, []},
        {Credo.Check.Readability.PredicateFunctionNames, []},
        {Credo.Check.Readability.PreferImplicitTry, []},
        {Credo.Check.Readability.RedundantBlankLines, []},
        {Credo.Check.Readability.Semicolons, []},
        {Credo.Check.Readability.SpaceAfterCommas, []},
        {Credo.Check.Readability.StringSigils, []},
        {Credo.Check.Readability.TrailingBlankLine, []},
        {Credo.Check.Readability.TrailingWhiteSpace, []},
        {Credo.Check.Readability.UnnecessaryAliasExpansion, []},
        {Credo.Check.Readability.VariableNames, []},

        # Refactoring Opportunities
        {Credo.Check.Refactor.CondStatements, []},
        {Credo.Check.Refactor.CyclomaticComplexity, []},
        {Credo.Check.Refactor.FunctionArity, []},
        {Credo.Check.Refactor.LongQuoteBlocks, []},
        {Credo.Check.Refactor.MapInto, []},
        {Credo.Check.Refactor.MatchInCondition, []},
        {Credo.Check.Refactor.NegatedConditionsInUnless, []},
        {Credo.Check.Refactor.NegatedConditionsWithElse, []},
        {Credo.Check.Refactor.Nesting, []},
        {Credo.Check.Refactor.UnlessWithElse, []},
        {Credo.Check.Refactor.WithClauses, []},

        # Warnings
        {Credo.Check.Warning.BoolOperationOnSameValues, []},
        {Credo.Check.Warning.ExpensiveEmptyEnumCheck, []},
        {Credo.Check.Warning.IExPry, []},
        {Credo.Check.Warning.IoInspect, []},
        {Credo.Check.Warning.LazyLogging, []},
        {Credo.Check.Warning.MixEnv, false},
        {Credo.Check.Warning.OperationOnSameValues, []},
        {Credo.Check.Warning.OperationWithConstantResult, []},
        {Credo.Check.Warning.RaiseInsideRescue, []},
        {Credo.Check.Warning.UnusedEnumOperation, []},
        {Credo.Check.Warning.UnusedFileOperation, []},
        {Credo.Check.Warning.UnusedKeywordOperation, []},
        {Credo.Check.Warning.UnusedListOperation, []},
        {Credo.Check.Warning.UnusedPathOperation, []},
        {Credo.Check.Warning.UnusedRegexOperation, []},
        {Credo.Check.Warning.UnusedStringOperation, []},
        {Credo.Check.Warning.UnusedTupleOperation, []},
        {Credo.Check.Warning.UnsafeExec, []},

        # Controversial and experimental checks (opt-in, just replace `false` with `[]`)
        {Credo.Check.Readability.StrictModuleLayout, false},
        {Credo.Check.Consistency.MultiAliasImportRequireUse, false},
        {Credo.Check.Consistency.UnusedVariableNames, false},
        {Credo.Check.Design.DuplicatedCode, false},
        {Credo.Check.Readability.AliasAs, false},
        {Credo.Check.Readability.MultiAlias, false},
        {Credo.Check.Readability.Specs, false},
        {Credo.Check.Readability.SinglePipe, false},
        {Credo.Check.Readability.WithCustomTaggedTuple, false},
        {Credo.Check.Refactor.ABCSize, false},
        {Credo.Check.Refactor.AppendSingleItem, false},
        {Credo.Check.Refactor.DoubleBooleanNegation, false},
        {Credo.Check.Refactor.ModuleDependencies, false},
        {Credo.Check.Refactor.NegatedIsNil, false},
        {Credo.Check.Refactor.PipeChainStart, false},
        {Credo.Check.Refactor.VariableRebinding, false},
        {Credo.Check.Warning.LeakyEnvironment, false},
        {Credo.Check.Warning.MapGetUnsafePass, false},
        {Credo.Check.Warning.UnsafeToAtom, false},

        # Nicene extras
        {Nicene.AvoidForbiddenNamespaces, false},
        # Following might be helpful, but is invisible to clients:
        # consider in future
        {Nicene.AvoidImportsFromCurrentApplication, false},
        {Nicene.ConsistentFunctionDefinitions, false},
        {Nicene.DocumentGraphqlSchema, false},
        {Nicene.EctoSchemaDirectories, false},
        {Nicene.FileAndModuleName, []},
        {Nicene.FileTopToBottom, false},
        {Nicene.NoSpecsPrivateFunctions, false},
        {Nicene.PublicFunctionsFirst, false},
        {Nicene.TestsInTestFolder, []},
        {Nicene.TrueFalseCaseStatements, false},
        # This has quite a lot of false positives
        {Nicene.UnnecessaryPatternMatching, false},
      ]
    }
  ]
}