Goldbely Linters (a work in progress, 2017-10-18)

.haml-lint.yml

# haml-lint explanations can be found in their documentation:
# https://github.com/brigade/haml-lint/blob/master/lib/haml_lint/linter/README.md

linters:
  AltText:
    enabled: true

  ClassAttributeWithStaticValue:
    enabled: true

  ClassesBeforeIds:
    enabled: false

  ConsecutiveComments:
    enabled: true

  ConsecutiveSilentScripts:
    enabled: true
    max_consecutive: 2

  EmptyScript:
    enabled: true

  FinalNewline:
    enabled: true

  HtmlAttributes:
    enabled: true

  ImplicitDiv:
    enabled: true

  Indentaion:
    enabled: true
    character: space

  LeadingCommentSpace:
    enabled: true

  LineLength:
    enabled: false
    # Github's default diff view is 112 chars wide
    max: 112

  MultilinePipe:
    enabled: true

  MultilineScript:
    enabled: true

  ObjectReferenceAttributes:
    enabled: true

  RuboCop:
    # TODO: Enable after installing RuboCop
    enabled: false

  RubyComments:
    enabled: true

  SpaceBeforeScript:
    enabled: true

  SpaceInsideHashAttributes:
    enabled: true
    style: space

  TagName:
    enabled: true

  TrailingWhitespace:
    enabled: true

  UnnecessaryInterpolation:
    enabled: true

  UnnecessaryStringOutput:
    enabled: true

.sass-lint.yml

options:
  formatter: stylish

files:
  include: 'app/assets/stylesheets/**/*.s+(a|c)ss'

rules:
  # Extends
  extends-before-mixins: 1
  extends-before-declarations: 1
  placeholder-in-extend: 1

  # Mixins
  mixins-before-declarations: 1

  # Line Spacing
  one-declaration-per-line: 1
  empty-line-between-blocks: 1
  single-line-per-selector: 1

  # Disallows
  no-attribute-selectors: 0
  no-color-hex: 0
  no-color-keywords: 0
  no-color-literals: 0
  no-combinators: 0
  no-css-comments: 1
  no-debug: 1
  no-disallowed-properties: 0
  no-duplicate-properties: 1
  no-empty-rulesets: 1
  no-extends: 0
  no-ids: 1
  no-important: 1
  no-invalid-hex: 1
  no-mergeable-selectors: 1
  no-misspelled-properties: 1
  no-qualifying-elements: 1
  no-trailing-whitespace: 1
  no-trailing-zero: 1
  no-transition-all: 1
  no-universal-selectors: 0
  no-url-domains: 1
  no-url-protocols: 1
  no-vendor-prefixes: 1
  no-warn: 1
  property-units: 0

  # Nesting
  declarations-before-nesting: 1
  force-attribute-nesting: 1
  force-element-nesting: 1
  force-pseudo-nesting: 1

  # Name Formats
  class-name-format:
    - 1
    -
      convention: 'hyphenatedbem'
  function-name-format: 1
  id-name-format: 0
  mixin-name-format: 1
  placeholder-name-format: 1
  variable-name-format: 1

  # Style Guide
  attribute-quotes: 1
  bem-depth: 0
  border-zero: 1
  brace-style: 1
  clean-import-paths: 1
  empty-args: 1
  hex-length: 1
  hex-notation: 1
  indentation: 1
  leading-zero: 1
  max-line-length: 0
  max-file-line-count: 0
  nesting-depth: 1
  property-sort-order: 0
  pseudo-element: 1
  quotes: 1
  shorthand-values: 1
  url-quotes: 1
  variable-for-property: 1
  zero-unit: 1

  # Inner Spacing
  space-after-comma: 1
  space-before-colon: 1
  space-after-colon: 1
  space-before-brace: 1
  space-before-bang: 1
  space-after-bang: 1
  space-between-parens:
    - 1
    -
      include: true
  space-around-operator: 1

  # Final Items
  trailing-semicolon: 1
  final-newline: 1

coffeelint.json

{
  "arrow_spacing": {
    "level": "error"
  },
  "camel_case_classes": {
    "level": "error"
  },
  "coffeescript_error": {
    "level": "error"
  },
  "colon_assignment_spacing": {
    "level": "ignore",
    "spacing": {
      "left": 0,
      "right": 1
    }
  },
  "cyclomatic_complexity": {
    "value": 10,
    "level": "warn"
  },
  "duplicate_key": {
    "level": "error"
  },
  "empty_constructor_needs_parens": {
    "level": "ignore"
  },
  "indentation": {
    "value": 2,
    "level": "error"
  },
  "line_endings": {
    "value": "unix",
    "level": "warn"
  },
  "max_line_length": {
    "value": 120,
    "level": "warn",
    "limitComments": true
  },
  "missing_fat_arrows": {
    "level": "ignore"
  },
  "newlines_after_classes": {
    "value": 3,
    "level": "error"
  },
  "no_backticks": {
    "level": "error"
  },
  "no_debugger": {
    "level": "error"
  },
  "no_empty_functions": {
    "level": "warn"
  },
  "no_empty_param_list": {
    "level": "error"
  },
  "no_implicit_braces": {
    "strict": true,
    "level": "ignore"
  },
  "no_implicit_parens": {
    "strict": true,
    "level": "ignore"
  },
  "no_interpolation_in_single_quotes": {
    "level": "ignore"
  },
  "no_plusplus": {
    "level": "warn"
  },
  "no_stand_alone_at": {
    "level": "warn"
  },
  "no_tabs": {
    "level": "error"
  },
  "no_throwing_strings": {
    "level": "error"
  },
  "no_trailing_semicolons": {
    "level": "error"
  },
  "no_trailing_whitespace": {
    "level": "error",
    "allowed_in_comments": false,
    "allowed_in_empty_lines": true
  },
  "no_unnecessary_double_quotes": {
    "level": "error"
  },
  "no_unnecessary_fat_arrows": {
    "level": "warn"
  },
  "non_empty_constructor_needs_parens": {
    "level": "ignore"
  },
  "space_operators": {
    "level": "error"
  },
  "spacing_after_comma": {
    "level": "error"
  }
}

Note: One of the configs says that Github's default diff view is 112 characters wide. I believe it's actually 120 now.