screen.rb wraps for screen command

- It watches reconnect of screen
- Besides, picoruby updated

Author: hasumikin

bin/screen.rb

@@ -0,0 +1,62 @@
+#!/usr/bin/env ruby
+
+require 'fileutils'
+
+DEFAULT_DEVICE = '/dev/ttyUSB0'
+DEFAULT_BAUDRATE = '115200'
+
+if ARGV.include?('--help') || ARGV.include?('-h')
+  puts <<~HELP
+    This script connects to a serial device using 'screen' and automatically
+    reconnects if the connection is lost. It waits for the device to become
+    available if it's not currently connected.
+    Usage: ruby screen.rb [device] [baud_rate]
+    Arguments:
+      device     - The serial device to connect to (default: #{DEFAULT_DEVICE})
+      baud_rate  - The baud rate for the connection (default: #{DEFAULT_BAUDRATE})
+    Example:
+      ruby screen.rb #{DEFAULT_DEVICE} #{DEFAULT_BAUDRATE}
+  HELP
+  exit
+end
+
+DEVICE = ARGV[0] || DEFAULT_DEVICE
+BAUD_RATE = ARGV[1] || DEFAULT_BAUDRATE
+
+def device_exists?(device)
+  File.exist?(device) && File.readable?(device)
+end
+
+def start_screen(device, baud_rate)
+  puts "#{Time.now}: Connecting to #{device} at #{baud_rate} baud..."
+  system("screen #{device} #{baud_rate}")
+  exit_status = $?.exitstatus
+  puts "#{Time.now}: Screen session exited with status #{exit_status}."
+end
+
+def wait_for_device(device)
+  puts "#{Time.now}: Waiting for #{device}..."
+  until device_exists?(device)
+    sleep 1
+    print "."
+  end
+  puts "\n#{Time.now}: Device #{device} is available!"
+  sleep 0.5
+end
+
+puts "Auto-reconnecting screen wrapper"
+puts "Device: #{DEVICE}, Baud rate: #{BAUD_RATE}"
+puts "Press Ctrl+C to exit"
+puts "-" * 40
+
+trap("INT") { puts "\nExiting..."; exit 0 }
+
+loop do
+  if device_exists?(DEVICE)
+    start_screen(DEVICE, BAUD_RATE)
+    puts "\n#{Time.now}: Screen session ended. Reconnecting..."
+    sleep 1
+  else
+    wait_for_device(DEVICE)
+  end
+end