Contents

require "pry"
require 'io/console'
require "xi/error_log"

module Xi
  module REPL
    extend self

    CONFIG_PATH = File.expand_path("~/.config/xi")
    HISTORY_FILE = "history"
    INIT_SCRIPT_FILE = "init.rb"

    DEFAULT_INIT_SCRIPT =
      "# Here you can customize or define functions that will be available in\n" \
      "# Xi, e.g. new streams or a custom clock."

    def start(irb: false)
      configure
      load_init_script

      irb ? IRB.start : Pry.start
    end

    def configure
      prepare_config_dir

      if ENV["INSIDE_EMACS"]
        Pry.config.correct_indent = false
        Pry.config.pager = false
        Pry.config.prompt = [ proc { "" }, proc { "" }]
      else
        Pry.config.prompt = [ proc { "xi> " }, proc { "..> " }]
      end

      Pry.config.history.file = history_path

      Pry.hooks.add_hook(:after_eval, "check_for_errors") do |result, pry|
        more_errors = ErrorLog.instance.more_errors?
        ErrorLog.instance.each do |msg|
          puts red("Error: #{msg}")
        end
        puts red("There were more errors...") if more_errors
      end
    end

    def red(string)
      "\e[31m\e[1m#{string}\e[22m\e[0m"
    end

    def load_init_script
      require(init_script_path)
    end

    def prepare_config_dir
      FileUtils.mkdir_p(CONFIG_PATH)

      unless File.exists?(init_script_path)
        File.write(init_script_path, DEFAULT_INIT_SCRIPT)
      end
    end

    def history_path
      File.join(CONFIG_PATH, HISTORY_FILE)
    end

    def init_script_path
      File.join(CONFIG_PATH, INIT_SCRIPT_FILE)
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
xi-lang-0.2.4	lib/xi/repl.rb
xi-lang-0.2.3	lib/xi/repl.rb