Module: SyntaxTree::CLI

Defined in:
lib/syntax_tree/cli.rb

Defined Under Namespace

Classes: AST, Action, Check, Color, Debug, Doc, Format, Write

Constant Summary collapse

HELP =

The help message displayed if the input arguments are not correctly ordered or formatted.

<<~HELP
  stree MODE FILE

  MODE: ast | check | debug | doc | format | write
  FILE: one or more paths to files to parse
HELP

Class Method Summary collapse

Class Method Details

.run(argv) ⇒ Object

Run the CLI over the given array of strings that make up the arguments passed to the invocation.



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# File 'lib/syntax_tree/cli.rb', line 147

def run(argv)
  if argv.length < 2
    warn(HELP)
    return 1
  end

  arg, *patterns = argv
  action =
    case arg
    when "a", "ast"
      AST.new
    when "c", "check"
      Check.new
    when "debug"
      Debug.new
    when "doc"
      Doc.new
    when "f", "format"
      Format.new
    when "w", "write"
      Write.new
    else
      warn(HELP)
      return 1
    end

  errored = false
  patterns.each do |pattern|
    Dir.glob(pattern).each do |filepath|
      next unless File.file?(filepath)
      source = SyntaxTree.read(filepath)

      begin
        action.run(filepath, source)
      rescue ParseError => error
        warn("Error: #{error.message}")

        if error.lineno
          highlight_error(error, source)
        else
          warn(error.message)
          warn(error.backtrace)
        end

        errored = true
      rescue Check::UnformattedError, Debug::NonIdempotentFormatError
        errored = true
      rescue => error
        warn(error.message)
        warn(error.backtrace)
        errored = true
      end
    end
  end

  if errored
    action.failure
    1
  else
    action.success
    0
  end
end