Class: FunctionsFramework::CLI

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

Overview

Implementation of the functions-framework-ruby executable.

Constant Summary collapse

DEFAULT_LOGGING_LEVEL =

The default logging level, if not given in the environment variable.

Returns:

  • (Integer) 
::Logger::Severity::INFO

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CLI

Create a new CLI, setting arguments to their defaults.



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# File 'lib/functions_framework/cli.rb', line 34

def initialize
  @target = ::ENV["FUNCTION_TARGET"] || ::FunctionsFramework::DEFAULT_TARGET
  @source = ::ENV["FUNCTION_SOURCE"] || ::FunctionsFramework::DEFAULT_SOURCE
  @env = nil
  @port = nil
  @bind = nil
  @min_threads = nil
  @max_threads = nil
  @detailed_errors = nil
  @signature_type = ::ENV["FUNCTION_SIGNATURE_TYPE"]
  @logging_level = init_logging_level
  @what_to_do = nil
  @error_message = nil
  @exit_code = 0
end

Instance Attribute Details

#error_message ⇒ String? (readonly)

Returns:

  • (String) —

    The current error message.

  • (nil) —

    if no error has occurred.



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# File 'lib/functions_framework/cli.rb', line 68

def error_message
  @error_message
end

#exit_code ⇒ Integer (readonly)

Returns The current exit status.

Returns:

  • (Integer) —

    The current exit status.



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# File 'lib/functions_framework/cli.rb', line 62

def exit_code
  @exit_code
end

Instance Method Details

#complete ⇒ Object

Finish the CLI, displaying any error status and exiting with the current exit code. Never returns.



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# File 'lib/functions_framework/cli.rb', line 174

def complete
  warn @error_message if @error_message
  exit @exit_code
end

#error? ⇒ boolean

Determine if an error has occurred

Returns:

  • (boolean) 


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# File 'lib/functions_framework/cli.rb', line 55

def error?
  !@error_message.nil?
end

#parse_args(argv) ⇒ self

Parse the given command line arguments. Exits if argument parsing failed.

Parameters:

  • argv (Array<String>)

Returns:

  • (self) 


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# File 'lib/functions_framework/cli.rb', line 77

def parse_args argv # rubocop:disable Metrics/MethodLength
  @option_parser = ::OptionParser.new do |op| # rubocop:disable Metrics/BlockLength
    op.on "-t", "--target TARGET",
          "Set the name of the function to execute (defaults to #{DEFAULT_TARGET})" do |val|
      @target = val
    end
    op.on "-s", "--source SOURCE",
          "Set the source file to load (defaults to #{DEFAULT_SOURCE})" do |val|
      @source = val
    end
    op.on "--signature-type TYPE",
          "Asserts that the function has the given signature type." \
          " Supported values are 'http' and 'cloudevent'." do |val|
      @signature_type = val
    end
    op.on "-p", "--port PORT", "Set the port to listen to (defaults to 8080)" do |val|
      @port = val.to_i
    end
    op.on "-b", "--bind BIND", "Set the address to bind to (defaults to 0.0.0.0)" do |val|
      @bind = val
    end
    op.on "-e", "--environment ENV", "Set the Rack environment" do |val|
      @env = val
    end
    op.on "--min-threads NUM", "Set the minimum threead pool size" do |val|
      @min_threads = val
    end
    op.on "--max-threads NUM", "Set the maximum threead pool size" do |val|
      @max_threads = val
    end
    op.on "--[no-]detailed-errors", "Set whether to show error details" do |val|
      @detailed_errors = val
    end
    op.on "--verify", "Verify the app only, but do not run the server." do
      @what_to_do ||= :verify
    end
    op.on "-v", "--verbose", "Increase log verbosity" do
      @logging_level -= 1
    end
    op.on "-q", "--quiet", "Decrease log verbosity" do
      @logging_level += 1
    end
    op.on "--version", "Display the framework version" do
      @what_to_do ||= :version
    end
    op.on "--help", "Display help" do
      @what_to_do ||= :help
    end
  end
  begin
    @option_parser.parse! argv
    error! "Unrecognized arguments: #{argv}\n#{@option_parser}", 2 unless argv.empty?
  rescue ::OptionParser::ParseError => e
    error! "#{e.message}\n#{@option_parser}", 2
  end
  self
end

#run ⇒ self

Perform the requested function.

  • If the --version flag was given, display the version.
  • If the --help flag was given, display online help.
  • If the --verify flag was given, load and verify the function, displaying any errors, then exit without starting a server.
  • Otherwise, start the configured server and block until it stops.

Returns:

  • (self) 


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# File 'lib/functions_framework/cli.rb', line 146

def run
  return self if error?
  case @what_to_do
  when :version
    puts ::FunctionsFramework::VERSION
  when :help
    puts @option_parser
  when :verify
    begin
      load_function
      puts "OK"
    rescue ::StandardError => e
      error! e.message
    end
  else
    begin
      start_server.wait_until_stopped
    rescue ::StandardError => e
      error! e.message
    end
  end
  self
end