Class: Utils::AST::FormulaAST Private

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Utils::AST
Defined in:
utils/ast.rb

Overview

This class is part of a private API. This class may only be used in the Homebrew/brew repository. Third parties should avoid using this class if possible, as it may be removed or changed without warning.

Helper class for editing formulae.

Constant Summary

Constants included from Utils::AST

BlockNode, Node, ProcessedSource, SendNode, TreeRewriter

Instance Method Summary collapse

Methods included from Utils::AST

body_children, call_node_match?, component_match?, process_source, stanza_text

Constructor Details

#initialize(formula_contents) ⇒ void

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:



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# File 'utils/ast.rb', line 86

def initialize(formula_contents)
  @formula_contents = formula_contents
  processed_source, children = process_formula
  @processed_source = T.let(processed_source, ProcessedSource)
  @children = T.let(children, T::Array[Node])
  @tree_rewriter = T.let(TreeRewriter.new(processed_source.buffer), TreeRewriter)
end

Instance Method Details

#add_bottle_block(bottle_output) ⇒ void

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

This method returns an undefined value.

Parameters:



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# File 'utils/ast.rb', line 110

def add_bottle_block(bottle_output)
  add_stanza(:bottle, "\n#{bottle_output.chomp}", type: :block_call)
end

#add_stanza(name, value, type: nil) ⇒ void

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

This method returns an undefined value.

Parameters:



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# File 'utils/ast.rb', line 156

def add_stanza(name, value, type: nil)
  preceding_component = if children.length > 1
    children.reduce do |previous_child, current_child|
      if formula_component_before_target?(current_child,
                                          target_name: name,
                                          target_type: type)
        next current_child
      else
        break previous_child
      end
    end
  else
    children.first
  end
  preceding_component = preceding_component.last_argument if preceding_component.is_a?(SendNode)

  preceding_expr = preceding_component.location.expression
  processed_source.comments.each do |comment|
    comment_expr = comment.location.expression
    distance = comment_expr.first_line - preceding_expr.first_line
    case distance
    when 0
      if comment_expr.last_line > preceding_expr.last_line ||
         comment_expr.end_pos > preceding_expr.end_pos
        preceding_expr = comment_expr
      end
    when 1
      preceding_expr = comment_expr
    end
  end

  tree_rewriter.insert_after(preceding_expr, "\n#{stanza_text(name, value, indent: 2)}")
end

#bottle_block ⇒ Node?

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Returns:



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# File 'utils/ast.rb', line 95

def bottle_block
  stanza(:bottle, type: :block_call)
end

#remove_stanza(name, type: nil) ⇒ void

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

This method returns an undefined value.

Parameters:



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# File 'utils/ast.rb', line 115

def remove_stanza(name, type: nil)
  stanza_node = stanza(name, type: type)
  raise "Could not find '#{name}' stanza!" if stanza_node.blank?

  # stanza is probably followed by a newline character
  # try to delete it if so
  stanza_range = stanza_node.source_range
  trailing_range = stanza_range.with(begin_pos: stanza_range.end_pos,
                                     end_pos:   stanza_range.end_pos + 1)
  if trailing_range.source.chomp.empty?
    stanza_range = stanza_range.adjust(end_pos: 1)

    # stanza_node is probably indented
    # since a trailing newline has been removed,
    # try to delete leading whitespace on line
    leading_range = stanza_range.with(begin_pos: stanza_range.begin_pos - stanza_range.column,
                                      end_pos:   stanza_range.begin_pos)
    if leading_range.source.strip.empty?
      stanza_range = stanza_range.adjust(begin_pos: -stanza_range.column)

      # if the stanza was preceded by a blank line, it should be removed
      # that is, if the two previous characters are newlines,
      # then delete one of them
      leading_range = stanza_range.with(begin_pos: stanza_range.begin_pos - 2,
                                        end_pos:   stanza_range.begin_pos)
      stanza_range = stanza_range.adjust(begin_pos: -1) if leading_range.source.chomp.chomp.empty?
    end
  end

  tree_rewriter.remove(stanza_range)
end

#replace_bottle_block(bottle_output) ⇒ void

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

This method returns an undefined value.

Parameters:



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# File 'utils/ast.rb', line 105

def replace_bottle_block(bottle_output)
  replace_stanza(:bottle, bottle_output.chomp, type: :block_call)
end

#replace_stanza(name, replacement, type: nil) ⇒ void

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

This method returns an undefined value.

Parameters:



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# File 'utils/ast.rb', line 148

def replace_stanza(name, replacement, type: nil)
  stanza_node = stanza(name, type: type)
  raise "Could not find '#{name}' stanza!" if stanza_node.blank?

  tree_rewriter.replace(stanza_node.source_range, stanza_text(name, replacement, indent: 2).lstrip)
end

#stanza(name, type: nil) ⇒ Node?

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

Returns:



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# File 'utils/ast.rb', line 100

def stanza(name, type: nil)
  children.find { |child| call_node_match?(child, name: name, type: type) }
end