Class: Terrestrial::Cli::VersionChecker

Inherits:
Object
  • Object
show all
Defined in:
lib/terrestrial/cli/version_checker.rb

Constant Summary collapse

URL = 
URI('https://api.github.com/repos/terrestrial-io/terrestrial-cli/releases/latest')

Class Method Summary collapse

Class Method Details

.higher_version?(v1, v2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/terrestrial/cli/version_checker.rb', line 44

def self.higher_version?(v1, v2)
  # Is v1 a higher semantic versioning number than v2?
  v1 = v1.split('.').reject {|i| i.to_i.to_s != i }.map(&:to_i)
  v2 = v2.split('.').reject {|i| i.to_i.to_s != i }.map(&:to_i)

  v1.each_with_index do |e, i|
    if e > v2[i] 
      return true
    end
  end
  false
end

.run ⇒ Object 



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# File 'lib/terrestrial/cli/version_checker.rb', line 11

def self.run
  http = Net::HTTP.new(URL.host, URL.port)
  http.read_timeout = 3
  http.open_timeout = 3

  response = http.start() {|client|
    client.get(URL.path)
  }

  json = JSON.load(response.body)

  # Ignore the "v" in "v1.1.1"
  begin 
    version = json["tag_name"][1..-1]
  rescue NoMethodError => e
    # Github ratelimiting will change the JSON response.
    # Keep calm and carry on.

    version = Terrestrial::Cli::VERSION
  end

  if higher_version?(version, Terrestrial::Cli::VERSION)
    puts "There is an update for Terrestrial: #{version} (your version: #{Terrestrial::Cli::VERSION})"
    puts "Run 'gem update terrestrial-cli' to update."
    puts ""
  end
rescue JSON::ParserError => e
  # Don't worry about JSON parsing errors - just carry on
rescue SocketError, Timeout::Error, Errno::EINVAL, Errno::ECONNRESET, EOFError,
         Net::HTTPBadResponse, Net::HTTPHeaderSyntaxError, Net::ProtocolError => e
  # Don't worry about Net HTTP errors - just carry on
end