RubyでGistの一覧を出力したり個別の内容を出力したり

gist.rb

#!/usr/bin/env ruby
# vim: fileencoding=utf-8

require 'net/https'
require 'uri'
require 'json'

class GistIDNotFound < RuntimeError;end

def get(url)
  uri = URI.parse(url)
  https = Net::HTTP.new(uri.host, uri.port)
  https.use_ssl = true
  https.verify_mode = OpenSSL::SSL::VERIFY_NONE
  res = https.start{https.get(uri.path)}
  raise GistIDNotFound unless res.code == "200"
  JSON.parse(res.body)
end

def list(gists)
  if gists.size.zero?
    warn "Not found!"
  else
    gists.each do |gist|
      puts "#{gist["id"]} : #{gist["description"]}" 
    end
  end
end

def files(gist)
  puts "user: #{gist["user"]["login"]}"
  puts "#{gist["description"]}"
  gist["files"].each do |key, value|
    puts "-*- #{key} -*- vim: filetype=#{value["language"]}"
    puts value["content"]
    puts
  end
end

if ARGV.size.zero?
  arg = "mugyu"
else
  arg = ARGV.shift
end

if arg.to_i.zero?
  list(get("https://api.github.com/users/#{arg}/gists"))
else
  begin
    files(get("https://api.github.com/gists/#{arg.to_i}"))
  rescue GistIDNotFound
    warn "GistID is not found! [GistID: #{arg.to_i}]"
  end
end