Ruby REPL for typing text on Android via adb

android-type.rb

require "readline"

def escaped(s)
  s.gsub("'", "'\\\\''")
end

while s = Readline.readline("> ", true)
  e = escaped(s)
  puts `./android-type.sh '#{e}'`
end

android-type.sh

#!/bin/bash

# Expanded from https://stackoverflow.com/a/46751558/28558

text=$(printf '%s%%s' ${@})  # concatenate and replace spaces with %s
text=${text%%%s}  # remove the trailing %s
text=${text//\'/\\\'}  # escape single quotes
text=${text//\"/\\\"}  # escape double quotes
text=${text//\&/\\\&}  # escape ampersands
text=${text//\;/\\\;}  # escape semicolons
text=${text//\(/\\\(}  # escape opening parentheses
text=${text//\)/\\\)}  # escape closing parentheses
text=${text//\|/\\\|}  # escape pipes
text=${text//\$/\\\$}  # escape dollar signs
# echo "[$text]"  # debugging

adb shell input text "$text"