Class: Glimmer::Launcher

Inherits:
Object
  • Object
show all
Defined in:
lib/glimmer/launcher.rb

Constant Summary collapse

OPERATING_SYSTEMS_SUPPORTED = 
["mac", "windows", "linux"]
TEXT_USAGE_PREFIX = 
<<~MULTI_LINE_STRING
  Usage: glimmer [--debug] [--log-level=VALUE] [[ENV_VAR=VALUE]...] [[-jruby-option]...] (application.rb or task[task_args]) [[application2.rb]...]

  Runs Glimmer applications/tasks.

  Either a single task or one or more applications may be specified.

  When a task is specified, it runs via rake. Some tasks take arguments in square brackets.

  Available tasks are below (you may also lookup by adding `require 'glimmer/rake_task'` in Rakefile and running rake -T):
MULTI_LINE_STRING
TEXT_USAGE_SUFFIX = 
<<~MULTI_LINE_STRING

  When applications are specified, they are run using JRuby, 
  automatically preloading the glimmer Ruby gem and SWT jar dependency.

  Optionally, extra Glimmer options, JRuby options and environment variables may be passed in.

  Glimmer options:
  - "--debug"           : Displays extra debugging information and passes "--debug" to JRuby
  - "--log-level=VALUE" : Sets Glimmer's Ruby logger level ("ERROR" / "WARN" / "INFO" / "DEBUG"; default is "WARN")

  Example: glimmer samples/hello_world.rb

  This runs the Glimmer application samples/hello_world.rb
MULTI_LINE_STRING
GLIMMER_LIB_LOCAL = 
File.expand_path(File.join(__FILE__, '..', '..', 'glimmer.rb'))
GLIMMER_LIB_GEM = 
'glimmer'
GLIMMER_OPTIONS = 
%w[--log-level]
GLIMMER_OPTION_ENV_VAR_MAPPING = 
{
  '--log-level' => 'GLIMMER_LOGGER_LEVEL'
}
REGEX_RAKE_TASK_WITH_ARGS = 
/^([^\[]+)\[?([^\]]*)\]?$/
@@mutex = 
Mutex.new

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(raw_options) ⇒ Launcher

Returns a new instance of Launcher.



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# File 'lib/glimmer/launcher.rb', line 125

def initialize(raw_options)
  @application_paths = extract_application_paths(raw_options)
  @env_vars = extract_env_vars(raw_options)
  @glimmer_options = extract_glimmer_options(raw_options)
  @jruby_options = raw_options
end

Instance Attribute Details

#application_paths ⇒ Object (readonly)

Returns the value of attribute application_paths.



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# File 'lib/glimmer/launcher.rb', line 120

def application_paths
  @application_paths
end

#env_vars ⇒ Object (readonly)

Returns the value of attribute env_vars.



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# File 'lib/glimmer/launcher.rb', line 121

def env_vars
  @env_vars
end

#glimmer_options ⇒ Object (readonly)

Returns the value of attribute glimmer_options.



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# File 'lib/glimmer/launcher.rb', line 122

def glimmer_options
  @glimmer_options
end

#jruby_options ⇒ Object (readonly)

Returns the value of attribute jruby_options.



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# File 'lib/glimmer/launcher.rb', line 123

def jruby_options
  @jruby_options
end

Class Method Details

.glimmer_lib ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 65

def glimmer_lib
  @@mutex.synchronize do
    unless @glimmer_lib
      @glimmer_lib = GLIMMER_LIB_GEM
      glimmer_gem_listing = `jgem list #{GLIMMER_LIB_GEM}`.split("\n").map {|l| l.split.first}
      if !glimmer_gem_listing.include?(GLIMMER_LIB_GEM) && File.exists?(GLIMMER_LIB_LOCAL)
        @glimmer_lib = GLIMMER_LIB_LOCAL
        puts "[DEVELOPMENT MODE] (detected #{@glimmer_lib})"
      end
    end
  end
  @glimmer_lib
end

.glimmer_option_env_vars(glimmer_options) ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 79

def glimmer_option_env_vars(glimmer_options)
  glimmer_options.reduce({}) do |hash, pair|
    hash.merge(GLIMMER_OPTION_ENV_VAR_MAPPING[pair.first] => pair.last)
  end
end

.jruby_os_specific_options ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 57

def jruby_os_specific_options
  OS.mac? ? "-J-XstartOnFirstThread" : ""
end

.jruby_swt_options ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 61

def jruby_swt_options
  "#{jruby_os_specific_options} -J-classpath \"#{swt_jar_file}\""
end

.launch(application, jruby_options: [], env_vars: {}, glimmer_options: {}) ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 91

def launch(application, jruby_options: [], env_vars: {}, glimmer_options: {})
  jruby_options_string = jruby_options.join(' ') + ' ' if jruby_options.any?
  env_vars = env_vars.merge(glimmer_option_env_vars(glimmer_options))
  env_vars_string = env_vars.map {|k,v| "#{k}=#{v}"}.join(' ')
  the_glimmer_lib = glimmer_lib
  devmode_require = nil
  if the_glimmer_lib == GLIMMER_LIB_LOCAL
    devmode_require = '-r puts_debuggerer '
  end
  rake_tasks = Rake.application.tasks.map(&:to_s).map {|t| t.sub('glimmer:', '')}
  potential_rake_task_parts = application.match(REGEX_RAKE_TASK_WITH_ARGS)
  application = potential_rake_task_parts[1]
  rake_task_args = potential_rake_task_parts[2].split(',')
  if rake_tasks.include?(application)
    load_env_vars(glimmer_option_env_vars(glimmer_options))
    rake_task = "glimmer:#{application}"
    puts "Running Glimmer rake task: #{rake_task}" if jruby_options_string.to_s.include?('--debug')
    Rake::Task[rake_task].invoke(*rake_task_args)
  else
    @@mutex.synchronize do
      puts "Launching Glimmer Application: #{application}" unless application.to_s.match(/(irb)|(gladiator)/)
    end
    command = "#{env_vars_string} jruby #{jruby_options_string}#{jruby_os_specific_options} #{devmode_require}-r #{the_glimmer_lib} -S #{application}"
    puts command if jruby_options_string.to_s.include?('--debug')
    system command
  end
end

.load_env_vars(env_vars) ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 85

def load_env_vars(env_vars)
  env_vars.each do |key, value|
    ENV[key] = value
  end
end

.platform_os ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 49

def platform_os
  OPERATING_SYSTEMS_SUPPORTED.detect {|os| OS.send("#{os}?")}
end

.swt_jar_file ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 53

def swt_jar_file
  @swt_jar_file ||= File.expand_path(File.join(__FILE__, '..', '..', '..', 'vendor', 'swt', platform_os, 'swt.jar'))
end

Instance Method Details

#launch ⇒ Object 



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# File 'lib/glimmer/launcher.rb', line 132

def launch
  if @application_paths.empty?
    display_usage
  else
    launch_application
  end
end