Class: RuboCop::Cop::FormulaCop

Inherits:
RuboCop::Cop show all
Defined in:
Library/Homebrew/rubocops/extend/formula_cop.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#file_path ⇒ Object

Returns the value of attribute file_path


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 7

def file_path
  @file_path
end

Instance Method Details

#audit_comments ⇒ Object

Yields to a block with comment text as parameter


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 381

def audit_comments
  @processed_source.comments.each do |comment_node|
    @offensive_node = comment_node
    @offense_source_range = :expression
    yield comment_node.text
  end
end

#audit_urls(urls, regex) ⇒ Object

Yields to block when there is a match Parameters: urls : Array of url/mirror method call nodes

regex: regex pattern to match urls


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 45

def audit_urls(urls, regex)
  urls.each do |url_node|
    url_string_node = parameters(url_node).first
    url_string = string_content(url_string_node)
    match_object = regex_match_group(url_string_node, regex)
    next unless match_object
    offending_node(url_string_node.parent)
    yield match_object, url_string
  end
end

#block_size(block) ⇒ Object

Returns the block length of the block node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 427

def block_size(block)
  block.loc.end.line - block.loc.begin.line
end

#caveats_strings ⇒ Object

Return all the caveats' string nodes in an array


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 342

def caveats_strings
  find_strings(find_method_def(@body, :caveats))
end

#check_precedence(first_nodes, next_nodes) ⇒ Object

Checks for precedence, returns the first pair of precedence violating nodes


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 315

def check_precedence(first_nodes, next_nodes)
  next_nodes.each do |each_next_node|
    first_nodes.each do |each_first_node|
      if component_precedes?(each_first_node, each_next_node)
        return [each_first_node, each_next_node]
      end
    end
  end
  nil
end

#class_name(node) ⇒ Object

Returns the class node's name, nil if not a class node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 410

def class_name(node)
  @offensive_node = node
  @offense_source_range = node.source_range
  node.const_name
end

#component_precedes?(first_node, next_node) ⇒ Boolean

If first node does not precede next_node, sets appropriate instance variables for reporting

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 327

def component_precedes?(first_node, next_node)
  return false if line_number(first_node) < line_number(next_node)
  @offense_source_range = first_node.source_range
  @offensive_node = first_node
  true
end

#depends_on?(dependency_name, *types) ⇒ Boolean

Returns nil if does not depend on dependency_name args: node - dependency_name - dependency's name

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 148

def depends_on?(dependency_name, *types)
  types = [:any] if types.empty?
  dependency_nodes = find_every_method_call_by_name(@body, :depends_on)
  idx = dependency_nodes.index do |n|
    types.any? { |type| depends_on_name_type?(n, dependency_name, type) }
  end
  return if idx.nil?
  @offense_source_range = dependency_nodes[idx].source_range
  @offensive_node = dependency_nodes[idx]
end

#depends_on_name_type?(node, name = nil, type = :required) ⇒ Boolean

Returns true if given dependency name and dependency type exist in given dependency method call node TODO: Add case where key of hash is an array

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 161

def depends_on_name_type?(node, name = nil, type = :required)
  if name
    name_match = false
  else
    name_match = true # Match only by type when name is nil
  end

  case type
  when :required
    type_match = required_dependency?(node)
    name_match ||= required_dependency_name?(node, name) if type_match
  when :build, :optional, :recommended, :run
    type_match = dependency_type_hash_match?(node, type)
    name_match ||= dependency_name_hash_match?(node, name) if type_match
  when :any
    type_match = true
    name_match ||= required_dependency_name?(node, name)
    name_match ||= dependency_name_hash_match?(node, name)
  else
    type_match = false
  end

  if type_match || name_match
    @offensive_node = node
    @offense_source_range = node.source_range
  end
  type_match && name_match
end

#end_column(node) ⇒ Object

Returns the ending position of the node in source code


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 400

def end_column(node)
  node.source_range.end_pos
end

#expression_negated?(node) ⇒ Boolean

Check if negation is present in the given node

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 335

def expression_negated?(node)
  return false if node.parent.nil?
  return false unless node.parent.method_name.equal?(:!)
  offending_node(node.parent)
end

#find_all_blocks(node, block_name) ⇒ Object

Returns an array of block nodes of any depth below node in AST If a block is given then yields matching block node to the block!


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 248

def find_all_blocks(node, block_name)
  return if node.nil?
  blocks = node.each_descendant(:block).select { |block_node| block_name == block_node.method_name }
  return blocks unless block_given?
  blocks.each do |block_node|
    offending_node(block_node)
    yield block_node
  end
end

#find_block(node, block_name) ⇒ Object

Returns a block named block_name inside node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 226

def find_block(node, block_name)
  return if node.nil?
  node.each_child_node(:block) do |block_node|
    next if block_node.method_name != block_name
    @offensive_node = block_node
    @offense_source_range = block_node.source_range
    return block_node
  end
  # If not found then, parent node becomes the offensive node
  @offensive_node = node.parent
  @offense_source_range = node.parent.source_range
  nil
end

#find_blocks(node, block_name) ⇒ Object

Returns an array of block nodes named block_name inside node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 241

def find_blocks(node, block_name)
  return if node.nil?
  node.each_child_node(:block).select { |block_node| block_name == block_node.method_name }
end

#find_const(node, const_name) ⇒ Object

Find CONSTANTs in the source if block given, yield matching nodes


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 192

def find_const(node, const_name)
  return if node.nil?
  node.each_descendant(:const) do |const_node|
    next unless const_node.const_name == const_name
    @offensive_node = const_node
    @offense_source_range = const_node.source_range
    yield const_node if block_given?
    return true
  end
  nil
end

#find_every_method_call_by_name(node, method_name = nil) ⇒ Object

Returns an array of method call nodes matching method_name in every descendant of node Returns every method call if no method_name is passed


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 92

def find_every_method_call_by_name(node, method_name = nil)
  return if node.nil?
  node.each_descendant(:send).select do |method_node|
    method_name.nil? ||
      method_name == method_node.method_name
  end
end

#find_instance_call(node, name) ⇒ Object

Matches receiver part of method, EX: to match `ARGV.<whatever>()` call `find_instance_call(node, “ARGV”)` yields to a block with parent node of receiver


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 134

def find_instance_call(node, name)
  node.each_descendant(:send) do |method_node|
    next if method_node.receiver.nil?
    next if method_node.receiver.const_name != name &&
            method_node.receiver.method_name != name
    @offense_source_range = method_node.receiver.source_range
    @offensive_node = method_node.receiver
    return true unless block_given?
    yield method_node
  end
end

#find_instance_method_call(node, instance, method_name) ⇒ Object

Matches a method with a receiver, EX: to match `Formula.factory(name)` call `find_instance_method_call(node, “Formula”, :factory)` EX: to match `build.head?` call `find_instance_method_call(node, :build, :head?)` yields to a block with matching method node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 117

def find_instance_method_call(node, instance, method_name)
  methods = find_every_method_call_by_name(node, method_name)
  methods.each do |method|
    next if method.receiver.nil?
    next if method.receiver.const_name != instance &&
            method.receiver.method_name != instance
    @offense_source_range = method.source_range
    @offensive_node = method
    return true unless block_given?
    yield method
  end
end

#find_method_calls_by_name(node, method_name) ⇒ Object

Returns an array of method call nodes matching method_name inside node with depth first order (Children nodes)


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 85

def find_method_calls_by_name(node, method_name)
  return if node.nil?
  node.each_child_node(:send).select { |method_node| method_name == method_node.method_name }
end

#find_method_def(node, method_name = nil) ⇒ Object

Returns a method definition node with method_name Returns first method def if method_name is nil


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 260

def find_method_def(node, method_name = nil)
  return if node.nil?
  node.each_child_node(:def) do |def_node|
    def_method_name = method_name(def_node)
    next unless method_name == def_method_name || method_name.nil?
    @offensive_node = def_node
    @offense_source_range = def_node.source_range
    return def_node
  end
  return if node.parent.nil?
  # If not found then, parent node becomes the offensive node
  @offensive_node = node.parent
  @offense_source_range = node.parent.source_range
  nil
end

#find_method_with_args(node, method_name, *args) ⇒ Object

Given a method_name and arguments, yields to a block with matching method passed as a parameter to the block


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 102

def find_method_with_args(node, method_name, *args)
  methods = find_every_method_call_by_name(node, method_name)
  methods.each do |method|
    next unless parameters_passed?(method, *args)
    return true unless block_given?
    yield method
  end
end

#find_node_method_by_name(node, method_name) ⇒ Object

Returns method_node matching method_name


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 64

def find_node_method_by_name(node, method_name)
  return if node.nil?
  node.each_child_node(:send) do |method_node|
    next unless method_node.method_name == method_name
    @offensive_node = method_node
    @offense_source_range = method_node.source_range
    return method_node
  end
  # If not found then, parent node becomes the offensive node
  @offensive_node = node.parent
  @offense_source_range = node.parent.source_range
  nil
end

#find_strings(node) ⇒ Object

Returns all string nodes among the descendants of given node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 57

def find_strings(node)
  return [] if node.nil?
  return node if node.str_type?
  node.each_descendant(:str)
end

#format_component(component_node) ⇒ Object

Returns printable component name


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 458

def format_component(component_node)
  return component_node.method_name if component_node.send_type? || component_node.block_type?
  method_name(component_node) if component_node.def_type?
end

#formula_tap ⇒ Object

Returns the formula tap


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 464

def formula_tap
  return unless match_obj = @file_path.match(%r{/(homebrew-\w+)/})
  match_obj[1]
end

#get_checksum_node(call) ⇒ Object

Returns the sha256 str node given a sha256 call node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 370

def get_checksum_node(call)
  return if parameters(call).empty? || parameters(call).nil?
  if parameters(call).first.str_type?
    parameters(call).first
  # sha256 is passed as a key-value pair in bottle blocks
  elsif parameters(call).first.hash_type?
    parameters(call).first.keys.first
  end
end

#line_number(node) ⇒ Object

Returns the line number of the node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 405

def line_number(node)
  node.loc.line
end

#line_start_column(node) ⇒ Object

Returns the begin position of the node's line in source code


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 390

def line_start_column(node)
  node.source_range.source_buffer.line_range(node.loc.line).begin_pos
end

#method_called?(node, method_name) ⇒ Boolean

Check if method_name is called among the direct children nodes in the given node Check if the node itself is the method

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 290

def method_called?(node, method_name)
  if node.send_type? && node.method_name == method_name
    offending_node(node)
    return true
  end
  node.each_child_node(:send) do |call_node|
    next unless call_node.method_name == method_name
    offending_node(call_node)
    return true
  end
  false
end

#method_called_ever?(node, method_name) ⇒ Boolean

Check if method_name is called among every descendant node of given node

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 304

def method_called_ever?(node, method_name)
  node.each_descendant(:send) do |call_node|
    next unless call_node.method_name == method_name
    @offensive_node = call_node
    @offense_source_range = call_node.source_range
    return true
  end
  false
end

#method_called_in_block?(node, method_name) ⇒ Boolean

Check if a method is called inside a block

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 277

def method_called_in_block?(node, method_name)
  block_body = node.children[2]
  block_body.each_child_node(:send) do |call_node|
    next unless call_node.method_name == method_name
    @offensive_node = call_node
    @offense_source_range = call_node.source_range
    return true
  end
  false
end

#method_name(node) ⇒ Object

Returns the method name for a def node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 417

def method_name(node)
  node.children[0] if node.def_type?
end

#node_equals?(node, var) ⇒ Boolean

To compare node with appropriate Ruby variable

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 221

def node_equals?(node, var)
  node == Parser::CurrentRuby.parse(var.inspect)
end

#offending_node(node) ⇒ Object

Set the given node as the offending node when required in custom cops


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 79

def offending_node(node)
  @offensive_node = node
  @offense_source_range = node.source_range
end

#on_class(node) ⇒ Object

This method is called by RuboCop and is the main entry point


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 11

def on_class(node)
  @file_path = processed_source.buffer.name
  return unless file_path_allowed?
  return unless formula_class?(node)
  return unless respond_to?(:audit_formula)
  class_node, parent_class_node, @body = *node
  @formula_name = Pathname.new(@file_path).basename(".rb").to_s
  audit_formula(node, class_node, parent_class_node, @body)
end

#parameters(method_node) ⇒ Object

Returns the array of arguments of the method_node


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 347

def parameters(method_node)
  method_node.arguments if method_node.send_type? || method_node.block_type?
end

#parameters_passed?(method_node, *params) ⇒ Boolean

Returns true if the given parameters are present in method call and sets the method call as the offending node params can be string, symbol, array, hash, matching regex

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 354

def parameters_passed?(method_node, *params)
  method_params = parameters(method_node)
  @offensive_node = method_node
  @offense_source_range = method_node.source_range
  params.all? do |given_param|
    method_params.any? do |method_param|
      if given_param.class == Regexp
        regex_match_group(method_param, given_param)
      else
        node_equals?(method_param, given_param)
      end
    end
  end
end

#problem(msg) ⇒ Object 


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 469

def problem(msg)
  add_offense(@offensive_node, location: @offense_source_range, message: msg)
end

#regex_match_group(node, pattern) ⇒ Object

Checks for regex match of pattern in the node and Sets the appropriate instance variables to report the match


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 23

def regex_match_group(node, pattern)
  string_repr = string_content(node)
  match_object = string_repr.match(pattern)
  return unless match_object
  node_begin_pos = start_column(node)
  line_begin_pos = line_start_column(node)
  if node_begin_pos == line_begin_pos
    @column = node_begin_pos + match_object.begin(0) - line_begin_pos
  else
    @column = node_begin_pos + match_object.begin(0) - line_begin_pos + 1
  end
  @length = match_object.to_s.length
  @line_no = line_number(node)
  @source_buf = source_buffer(node)
  @offense_source_range = source_range(@source_buf, @line_no, @column, @length)
  @offensive_node = node
  match_object
end

#size(node) ⇒ Object

Returns the node size in the source code


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 422

def size(node)
  node.source_range.size
end

#source_buffer(node) ⇒ Object

Source buffer is required as an argument to report style violations


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 432

def source_buffer(node)
  node.source_range.source_buffer
end

#start_column(node) ⇒ Object

Returns the begin position of the node in source code


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 395

def start_column(node)
  node.source_range.begin_pos
end

#string_content(node) ⇒ Object

Returns the string representation if node is of type str(plain) or dstr(interpolated) or const


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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 437

def string_content(node)
  case node.type
  when :str
    node.str_content
  when :dstr
    node.each_child_node(:str).map(&:str_content).join("")
  when :const
    node.const_name
  when :sym
    node.children.first.to_s
  else
    ""
  end
end

#versioned_formula? ⇒ Boolean

Returns true if the formula is versioned

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/rubocops/extend/formula_cop.rb', line 453

def versioned_formula?
  @formula_name.include?("@")
end