Class: Transpec::BaseRewriter

Inherits:
Object
  • Object
show all
Defined in:
lib/transpec/base_rewriter.rb

Direct Known Subclasses

Converter, DynamicAnalyzer::Rewriter

Defined Under Namespace

Classes: OverlappedRewriteError

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.create_source_rewriter(processed_source) ⇒ Object 



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# File 'lib/transpec/base_rewriter.rb', line 7

def self.create_source_rewriter(processed_source)
  # We prefer :warn diagnostic level and diagnostic consumer over :raise level
  # because the Parser::ClobberingError raised with :raise does not contain detailed message.
  # https://github.com/whitequark/parser/blob/v2.5.1.2/lib/parser/source/tree_rewriter.rb#L297
  source_rewriter = Parser::Source::TreeRewriter.new(
    processed_source.buffer,
    different_replacements: :warn,
      swallowed_insertions: :warn
  )

  source_rewriter.diagnostics.consumer = proc do |diagnostic|
    fail OverlappedRewriteError, diagnostic.render.join("\n")
  end

  source_rewriter
end

Instance Method Details

#rewrite(processed_source) ⇒ Object 



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# File 'lib/transpec/base_rewriter.rb', line 43

def rewrite(processed_source)
  fail processed_source.error if processed_source.error

  source_rewriter = self.class.create_source_rewriter(processed_source)
  incomplete = false

  begin
    process(processed_source.ast, source_rewriter)
  rescue OverlappedRewriteError
    incomplete = true
  end

  rewritten_source = source_rewriter.process
  rewritten_source = rewrite_source(rewritten_source, processed_source.path) if incomplete

  rewritten_source
end

#rewrite_file!(arg) ⇒ Object 



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# File 'lib/transpec/base_rewriter.rb', line 24

def rewrite_file!(arg)
  processed_source = case arg
                     when String          then ProcessedSource.from_file(arg)
                     when ProcessedSource then arg
                     else fail "Invalid argument: #{arg}"
                     end

  fail 'ProcessedSource must be derived from a file' unless processed_source.path

  rewritten_source = rewrite(processed_source)
  return if processed_source.to_s == rewritten_source
  File.write(processed_source.path, rewritten_source)
end

#rewrite_source(source, path = nil) ⇒ Object 



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# File 'lib/transpec/base_rewriter.rb', line 38

def rewrite_source(source, path = nil)
  processed_source = ProcessedSource.new(source, path)
  rewrite(processed_source)
end