Class: Tabry::Replty::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/tabry/replty/builder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, repl) ⇒ Builder

TODO: implement before_action, after_action, sub-REPLs; share code in run_result with CLI::Builder



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# File 'lib/tabry/replty/builder.rb', line 15

def initialize(config, repl)
  @runner = Tabry::Runner.new(config: config)
  @repl = repl
end

Instance Attribute Details

#repl ⇒ Object (readonly)

Returns the value of attribute repl.



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# File 'lib/tabry/replty/builder.rb', line 11

def repl
  @repl
end

#runner ⇒ Object (readonly)

Returns the value of attribute runner.



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# File 'lib/tabry/replty/builder.rb', line 11

def runner
  @runner
end

Instance Method Details

#load_history(file) ⇒ Object 



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# File 'lib/tabry/replty/builder.rb', line 27

def load_history(file)
  return unless file

  File.open(file) do |f|
    f.each do |l|
      Readline::HISTORY.push l.chomp
    end
  end
rescue Errno::ENOENT # rubocop:disable Lint/SuppressedException
end

#readline ⇒ Object 



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# File 'lib/tabry/replty/builder.rb', line 20

def readline
  Readline.readline(repl.tabry_prompt, true)
rescue Interrupt
  puts "^C"
  retry
end

#run(history_file: nil, tokenizer: ShellTokenizer) ⇒ Object 



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# File 'lib/tabry/replty/builder.rb', line 53

def run(history_file: nil, tokenizer: ShellTokenizer)
  history_file = history_file&.gsub(%r{^~/}, "#{Dir.home}/")
  load_history(history_file)

  Readline.completion_proc = proc do
    cmd, args, last_arg = tokenizer.split_with_comppoint(Readline.line_buffer, Readline.point)
    options = runner.options([cmd, *args].compact, last_arg)
    options.map do |opt|
      # if opt is a symbol, it's a "opts method" option type -- where a REPL method returns the options.
      # TODO: a bit weird since the REPL's "args" and "flags" are wrong/old when that completion method is run
      # also filter to start_with? is more appropriate in tabry, not here, but whatever
      opt.is_a?(Symbol) ? repl.send(opt)&.select { |x| x.start_with?(last_arg) } : opt
    end.flatten
  end

  while (cmdline = readline)
    raw_args = tokenizer.split(cmdline)
    next if raw_args.empty?

    result = runner.parse(raw_args)
    # TODO: usage has "myrepl" (command name) in; also, "got 1 args" is confusing when command doesn't exist
    if result.help?
      puts result.usage
    elsif result.invalid_usage_reason
      puts "Invalid usage: #{result.invalid_usage_reason}"
      puts
      puts result.usage
    else
      run_result(raw_args, result)
    end
  end

  save_history(history_file)
end

#run_result(raw_args, result) ⇒ Object 



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# File 'lib/tabry/replty/builder.rb', line 88

def run_result(raw_args, result)
  met = result.state.subcommand_stack.join("__").gsub("-", "_")
  repl.internals = ::Tabry::CLI::Internals.new(
    runner: runner, raw_args: raw_args,
    state: result.state, met: met, result: result
  )
  catch(:tabry_replty_command_exit) do
    repl.send(met.to_sym)
  end
end

#save_history(file, max_size = 10_000) ⇒ Object 



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# File 'lib/tabry/replty/builder.rb', line 38

def save_history(file, max_size = 10_000)
  return unless file

  history = Readline::HISTORY.each

  # Skip over excess elements:
  (Readline::HISTORY.length - max_size).times do
    history.next
  end

  File.open(file, "w") do |f|
    loop { f.puts history.next }
  end
end