SwiftLint Configuration. [Rules](https://github.com/realm/SwiftLint/blob/master/Rules.md)

.swiftlint.yml

# included:

excluded:
  - Pods
  - R.generated.swift

# analyzer_rules:

disabled_rules:
  - function_body_length
  - cyclomatic_complexity
  - function_parameter_count
  - force_cast
  - type_body_length
  - file_length
  - large_tuple
  
opt_in_rules:
  - anyobject_protocol
  - array_init
  - attributes
  # - closure_body_length
  - closure_end_indentation
  - closure_spacing
  - collection_alignment
  - conditional_returns_on_newline
  - contains_over_first_not_nil
  - convenience_type
  - discouraged_object_literal
  - discouraged_optional_boolean
  # - discouraged_optional_collection
  - empty_count
  - empty_string
  # - empty_xctest_method
  # - explicit_acl
  - explicit_enum_raw_value
  - explicit_init
  - explicit_self
  # - explicit_top_level_acl
  # - explicit_type_interface
  - extension_access_modifier
  - fallthrough
  - fatal_error_message
  # - file_header
  # - file_name
  # - file_types_order
  - first_where
  # - force_unwrapping
  # - function_default_parameter_at_end
  - identical_operands
  - implicit_return
  - implicitly_unwrapped_optional
  - joined_default_parameter
  - last_where
  - legacy_multiple
  - legacy_random
  - let_var_whitespace
  - literal_expression_end_indentation
  - lower_acl_than_parent
  - missing_docs
  - modifier_order
  - multiline_arguments
  # - multiline_arguments_brackets
  - multiline_function_chains
  # - multiline_literal_brackets
  - multiline_parameters
  # - multiline_parameters_brackets
  - nimble_operator
  - no_extension_access_modifier
  # - no_grouping_extension
  - nslocalizedstring_key
  - nslocalizedstring_require_bundle
  - number_separator
  - object_literal
  - operator_usage_whitespace
  - overridden_super_call
  - override_in_extension
  - pattern_matching_keywords
  - prefixed_toplevel_constant
  - private_action
  - private_outlet
  - prohibited_interface_builder
  - prohibited_super_call
  - quick_discouraged_call
  - quick_discouraged_focused_test
  - quick_discouraged_pending_test
  - reduce_into
  - redundant_nil_coalescing
  - redundant_type_annotation
  # - required_deinit
  - required_enum_case
  - single_test_class
  - sorted_first_last
  - sorted_imports
  - static_operator
  - strict_fileprivate
  - strong_iboutlet
  - switch_case_on_newline
  - toggle_bool
  # - trailing_closure
  - type_contents_order
  - unavailable_function
  # - unneeded_parentheses_in_closure_argument
  - unowned_variable_capture
  - untyped_error_in_catch
  - unused_import
  - unused_private_declaration
  - vertical_parameter_alignment_on_call
  - vertical_whitespace_between_cases
  - vertical_whitespace_closing_braces
  # - vertical_whitespace_opening_braces
  - xct_specific_matcher
  - yoda_condition

# force_cast: warning

line_length:
  warning: 140
  ignores_urls: true
  # ignores_function_declarations: true
  ignores_comments: true

# identifier_name:
#   allowed_symbols: "_"
#   excluded:
#     - id

conditional_returns_on_newline:
  if_only: true

# custom_rules:
  # auto_generated_leftovers:
  #   regex: 'func [^\n]*\{\n(\s*super\.[^\n]*\n(\s*\/\/[^\n]*\n)*|(\s*\/\/[^\n]*\n)+)\s*\}'
  #   message: "Delete auto-generated functions that you don't use"

  # numbers_smell:
  #   regex: '(return |case |\w\(|: |\?\? |\, |== |<=? |>=? |\+= |\-= |\/= |\*= |%= |\w\.\w+ = )\(*\d{2,}'
  #   message: "Numbers smell; define a constant instead."

  # non_localized_word:
  #   regex: '(?<!NSLocalizedString\()"[[:upper:]][[:lower:]]+"'
  #   message: "Wrap string in NSLocalizedString()"

  # non_localized_sentence:
  #   regex: '(?<!NSLocalizedString\(|fatalError\(|\S)"[^"]+ [^"]*"'
  #   message: "Wrap string in NSLocalizedString()"

  # non_localized_multiline:
  #   regex: '(?<!NSLocalizedString\()""".*?"""'
  #   message: "Wrap string in NSLocalizedString()"

  # already_true:
  #   regex: "== true"
  #   message: "Don't compare to true, just use the bool value."

  # already_bool:
  #   regex: "== false"
  #   message: "Don't compare to false, just use !value."

  # commented_code:
  #   regex: '(?<!:|\/)\/\/\h*[a-z.](?!wiftlint)'
  #   message: "Comment starting with lowercase letter - did you forget to delete old code?"

  # multiline_commented_code:
  #   regex: '^\s*[a-z]'
  #   match_kinds: comment
  #   message: "Comment starting with lowercase letter - did you forget to delete old code?"

  # fatal_error:
  #   name: Fatal Error
  #   excluded: "Tests/*"
  #   message: Prefer using `queuedFatalError` over `fatalError` to avoid leaking compiler host machine paths.
  #   regex: \bfatalError\b
  #   match_kinds:
  #     - identifier
  #   severity: error

  # comments_space: 
  #   name: "Space After Comment"
  #   regex: '(^ *//\w+)'
  #   message: "There should be a space after //"
  #   severity: warning

  # explicit_failure_calls:
  #   name: “Avoid asserting ‘false’”
  #   regex: ‘((assert|precondition)\(false)’
  #   message: “Use assertionFailure() or preconditionFailure() instead.”
  #   severity: warning

  # multiple_empty_lines:
  #  name: "Multiple Empty Lines"
  #  regex: '((?:\s*\n){3,})'
  #  message: "There are too many line breaks"
  #  severity: error

  # comments_capitalized_find_possible_code:
  #   name: "Catch Commented Out Code"
  #   regex: "(^ *// +(?!swiftlint)[a-z]+)"
  #   message: "The first word of a comment should be capitalized"
  #   severity: warning

  # empty_line_after_guard:
  #   name: "Empty Line After Guard"
  #   regex: "(^ *guard[ a-zA-Z0-9=?.\(\),><!]*\{[ a-zA-Z0-9=?.\(\),><!]*\}\n *(?!(?:return|guard))\S+)"
  #   message: "There should be an empty line after a guard"
  #   severity: error

  # empty_line_after_super:
  #   name: "Empty Line After Super"
  #   regex: "(^ *super\.[ a-zA-Z0-9=?.\(\)\{\}:,><!]*\n *(?!(?:\}|return))\S+)"
  #   message: "There should be an empty line after super"
  #   severity: error

  # protocol_conformance:
  #   name: "Protocol Conformance"
  #   message: "Protocol conformance should be declared in separate extensions in the same file"
  #   regex: "(class|struct|extension)[[:space:]]+(?i:(?![^d]*delegate:))[^'\"()<>{},!?:]+:([^'\"<>(){},!?:]+,)+[^'\"<>(){},!?:]*\\{"
  #   match_kinds:
  #     - keyword
  #   severity: warning

  # computed_property:
  #   name: "Computed Properties"
  #   message: "The get clause should be omitted if the computed property is read only"
  #   regex: "var[[:space:]]+[^:]+:[^{]*\\{[[:space:]]*get[[:space:]]*\\{[^}]+\\}(?![[:space:]]*set)"
  #   match_kinds:
  #     - keyword
  #   severity: warning