Class | MCollective::Applications |
In: |
lib/mcollective/applications.rb
|
Parent: | Object |
# File lib/mcollective/applications.rb, line 3 3: def self.[](appname) 4: load_application(appname) 5: PluginManager["#{appname}_application"] 6: end
Filters a string of opts out using Shellwords keeping only things related to —config and -c
# File lib/mcollective/applications.rb, line 46 46: def self.filter_extra_options(opts) 47: res = "" 48: words = Shellwords.shellwords(opts) 49: words.each_with_index do |word,idx| 50: if word == "-c" 51: return "--config=#{words[idx + 1]}" 52: elsif word == "--config" 53: return "--config=#{words[idx + 1]}" 54: elsif word =~ /\-c=/ 55: return word 56: elsif word =~ /\-\-config=/ 57: return word 58: end 59: end 60: 61: return "" 62: end
Returns an array of applications found in the lib dirs
# File lib/mcollective/applications.rb, line 25 25: def self.list 26: load_config 27: 28: applist = [] 29: 30: Config.instance.libdir.each do |libdir| 31: applicationdir = "#{libdir}/mcollective/application" 32: next unless File.directory?(applicationdir) 33: 34: Dir.entries(applicationdir).grep(/\.rb$/).each do |application| 35: applist << File.basename(application, ".rb") 36: end 37: end 38: 39: applist 40: rescue 41: return [] 42: end
# File lib/mcollective/applications.rb, line 15 15: def self.load_application(appname) 16: return if PluginManager.include?("#{appname}_application") 17: 18: load_config 19: 20: PluginManager.loadclass "MCollective::Application::#{appname.capitalize}" 21: PluginManager << {:type => "#{appname}_application", :class => "MCollective::Application::#{appname.capitalize}"} 22: end
We need to know the config file in order to know the libdir so that we can find applications.
The problem is the CLI might be stuffed with options only the app in the libdir might understand so we have a chicken and egg situation.
We‘re parsing and filtering MCOLLECTIVE_EXTRA_OPTS removing all but config related options and parsing the options looking just for the config file.
We‘re handling failures gracefully and finally restoring the ARG and MCOLLECTIVE_EXTRA_OPTS to the state they were before we started parsing.
This is mostly a hack, when we‘re redoing how config works this stuff should be made less sucky
# File lib/mcollective/applications.rb, line 81 81: def self.load_config 82: return if Config.instance.configured 83: 84: original_argv = ARGV.clone 85: original_extra_opts = ENV["MCOLLECTIVE_EXTRA_OPTS"].clone rescue nil 86: configfile = nil 87: 88: parser = OptionParser.new 89: parser.on("--config CONFIG", "-c", "Config file") do |f| 90: configfile = f 91: end 92: 93: parser.program_name = $0 94: 95: parser.on("--help") 96: 97: # avoid option parsers own internal version handling that sux 98: parser.on("-v", "--verbose") 99: 100: if original_extra_opts 101: begin 102: # optparse will parse the whole ENV in one go and refuse 103: # to play along with the retry trick I do below so in 104: # order to handle unknown options properly I parse out 105: # only -c and --config deleting everything else and 106: # then restore the environment variable later when I 107: # am done with it 108: ENV["MCOLLECTIVE_EXTRA_OPTS"] = filter_extra_options(ENV["MCOLLECTIVE_EXTRA_OPTS"].clone) 109: parser.environment("MCOLLECTIVE_EXTRA_OPTS") 110: rescue Exception => e 111: Log.error("Failed to parse MCOLLECTIVE_EXTRA_OPTS: #{e}") 112: end 113: 114: ENV["MCOLLECTIVE_EXTRA_OPTS"] = original_extra_opts.clone 115: end 116: 117: begin 118: parser.parse! 119: rescue OptionParser::InvalidOption => e 120: retry 121: end 122: 123: ARGV.clear 124: original_argv.each {|a| ARGV << a} 125: 126: configfile = Util.config_file_for_user unless configfile 127: 128: Config.instance.loadconfig(configfile) 129: end