Automated installation of Android SDK components

android_install.rb

require 'pty'
require 'expect'


def parse_android_packages(packages_raw)
  packages_raw = packages_raw.split("\n----------\n")
  result = []

  packages_raw.each do |raw|
    id_match = /id: (\d+) or "(.+)"/.match(raw)
    type_match = /Type: (.*)/.match(raw)
    desc_match = /Desc: (.*)/.match(raw)

    next if id_match.nil? || type_match.nil? || desc_match.nil?

    result << {
        :id => id_match[1],
        :name => id_match[2],
        :desc => desc_match[1],
        :type => type_match[1]
    }
  end

  result
end

def filter_packages(packages, filters)
  result = []
  unknown = []
  filters.each do |filter|
    found = []
    packages.each do |package|
      if package[:name].include?(filter) || package[:type] == filter || package[:desc].include?(filter)
        found << package
      end
    end
    result += found
    if found.empty?
      unknown << filter
    end
  end

  unless unknown.empty?
    raise ArgumentError, "Could not find matches for the following filters: #{unknown}"
  end

  result
end

def list_packages
  packages_raw = `android list sdk -a --extended`
  parse_android_packages(packages_raw)
end

def accept_license(cout, cin, timeout=3000)
  start_at = Time.now
  buffer = ''
  loop do
    if Time.now - start_at > timeout
      raise 'Timeout while waiting to accept license'
    end
    begin
      nextc = cout.getc
    rescue
      nextc = nil
    end
    return buffer if nextc.nil?
    buffer << nextc
    break if buffer =~ /Do you accept the license '.*' \[y\/n\]: /
  end

  cin.puts 'y'

  buffer
end

def install_packages(packages)
  ids = packages.collect {|package| package[:id]}
  cmd = "android update sdk --no-ui -a --filter #{ids.join(',')}"
  puts cmd
  android_out, android_in, pid = PTY.spawn(cmd)

  loop do
    buffer = accept_license(android_out, android_in)
    break if buffer.empty? # Reached the end
    puts buffer
  end

end

# The filters can match on (partial) package id, package type, or partial match of the first line of the package description.
filters = ['platform-tools', 'build-tools', 'Extras', 'Google Play Services']
packages = list_packages
filtered = filter_packages(packages, filters)

install_packages(filtered)