A sublime syntax file hand crafted and tuned perfectly for Ruby on Rails

TempleOfRails.sublime-syntax

%YAML 1.2
---
name: TempleOfRails
file_extensions: [rb]
scope: source.ruby.rails

contexts:
  main:
    # comments
    - match: '#.*$'
      scope: comment.line.number-sign.ruby
    # block comments
    - match: '^\s*=begin\b'
      scope: punctuation.definition.comment.ruby
      push:
        - meta_scope: comment.block.ruby
        - match: '^\s*=end\b'
          scope: punctuation.definition.comment.ruby
          pop: true
    # assignment ops
    - match: (?<![=<>])=(?!=|>)
      scope: keyword.operator.assignment.ruby
    # comparison ops
    - match: (?:===|==|!=|<=|>=|<=>|<|>)
      scope: keyword.operator.comparison.ruby
    # logical ops
    - match: \b(?:and|or|not)\b|(?:&&|\|\||!)
      scope: keyword.operator.logical.ruby
    # function defs
    - match: \bdef\b\s+(?:self\.)?([a-zA-Z_]\w*[!?=]?)
      captures:
        0: keyword.function.ruby
        1: entity.name.function.ruby
    # method calls
    - match: (?<=\.)[a-zA-Z_]\w*[!?=]?
      scope: variable.function.ruby
    # class defs
    - match: \bclass\b\s+([A-Z]\w*(?:::[A-Z]\w*)*)(?:\s*<\s*([A-Z]\w*(?:::[A-Z]\w*)*))?
      captures:
        0: keyword.class.ruby
        1: entity.name.class.ruby
        2: entity.other.inherited-class.ruby
    # module defs
    - match: \bmodule\b\s+([A-Z]\w*(?:::[A-Z]\w*)*)
      captures:
        0: keyword.module.ruby
        1: entity.name.type.namespace.ruby
    # some keywords
    - match: \b(end|class|if|else|elsif|return|until|module|include|included|class_methods|extend|do|begin|rescue)\b
      scope: keyword
    # keywords like private
    - match: \b(private)\b
      scope: keyword.declaration.private.ruby
    # symbols
    - match: (?<!:):(?!:)([a-zA-Z_]\w*[!?=]?)
      captures:
        0: punctuation.definition.constant.ruby
        1: constant.other.symbol.ruby
    # hash keys
    - match: (?<!:)\b([a-zA-Z_]\w*[!?=]?)(:)(?!:)
      captures:
        1: variable.parameter.tag.key.ruby
        2: punctuation.separator.key-value.ruby
    # strings
    - match: '"'
      push: string
    # basic numerals
    - match: (?<!\.)\b\d(?:_?\d)*(?:\.\d(?:_?\d)*)?(?:[eE][+-]?\d(?:_?\d)*)?\b
      scope: constant.numeric.ruby
    # Rails helpers (only some for now, to do: add all)
    - match: \b(after_action|append_after_action|prepend_after_action|around_action|append_around_action|prepend_around_action|before_action|append_before_action|prepend_before_action|skip_after_action|skip_around_action|skip_before_action)\b
      scope: support.function.rails.callback.ruby
    - match: \b(render|redirect_to)\b
      scope: support.function.rails.response.ruby
    - match: \b(expires_in|fresh_when|stale)\b
      scope: support.function.rails.caching.ruby
    - match: \b(allow_browser)\b
      scope: support.function.rails.browser-guard.ruby
    - match: \b(helper_method)\b
      scope: support.function.rails.helper.ruby


  string:
    - meta_scope: string.quoted.double.ruby
    - match: \\.
      scope: constant.character.escape.ruby
    - match: '"'
      pop: true