Class: Bosh::Cli::Runner
Instance Attribute Summary collapse
- #args ⇒ Array readonly
- #options ⇒ Hash readonly
Class Method Summary collapse
Instance Method Summary collapse
- #add_shortcuts ⇒ Object
- #build_parse_tree ⇒ Object
-
#find_completions(words, node = @parse_tree, index = 0) ⇒ Object
Finds command completions in the parse tree.
- #get_gem_plugins ⇒ Object
-
#initialize(args, options = {}) ⇒ Runner
constructor
A new instance of Runner.
- #load_gem_plugins ⇒ Object
- #load_local_plugins ⇒ Object
-
#load_plugins ⇒ void
Discover and load CLI plugins from all available gems.
- #parse_global_options ⇒ Object
- #plugins_glob ⇒ Object
- #require_plugin(file) ⇒ Object
-
#run ⇒ void
Find and run CLI command.
- #search_parse_tree(node) ⇒ Object
- #try_alias ⇒ Object
- #usage ⇒ Object
Constructor Details
#initialize(args, options = {}) ⇒ Runner
Returns a new instance of Runner.
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# File 'lib/cli/runner.rb', line 20 def initialize(args, = {}) @args = args @options = .dup = "Usage: bosh [<options>] <command> [<args>]" @option_parser = OptionParser.new() Config.colorize = true Config.output ||= STDOUT end |
Instance Attribute Details
#args ⇒ Array (readonly)
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# File 'lib/cli/runner.rb', line 9 def args @args end |
#options ⇒ Hash (readonly)
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# File 'lib/cli/runner.rb', line 12 def @options end |
Class Method Details
.run(args) ⇒ Object
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# File 'lib/cli/runner.rb', line 15 def self.run(args) new(args).run end |
Instance Method Details
#add_shortcuts ⇒ Object
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# File 'lib/cli/runner.rb', line 215 def add_shortcuts { "st" => "status", "props" => "properties", "cck" => "cloudcheck" }.each do |short, long| @parse_tree[short] = @parse_tree[long] end end |
#build_parse_tree ⇒ Object
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# File 'lib/cli/runner.rb', line 200 def build_parse_tree @parse_tree = ParseTreeNode.new Config.commands.each_value do |command| p = @parse_tree n_kw = command.keywords.size command.keywords.each_with_index do |kw, i| p[kw] ||= ParseTreeNode.new p = p[kw] p.command = command if i == n_kw - 1 end end end |
#find_completions(words, node = @parse_tree, index = 0) ⇒ Object
Finds command completions in the parse tree
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# File 'lib/cli/runner.rb', line 83 def find_completions(words, node = @parse_tree, index = 0) word = words[index] # exact match and not on the last word if node[word] && words.length != index find_completions(words, node[word], index + 1) # exact match at the last word elsif node[word] node[word].values # find all partial matches else node.keys.grep(/^#{word}/) end end |
#get_gem_plugins ⇒ Object
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# File 'lib/cli/runner.rb', line 186 def get_gem_plugins Gem::Specification.latest_specs(true).map { |spec| spec.matches_for_glob(plugins_glob) }.flatten.uniq rescue err("Cannot load plugins, ".make_yellow + "please run `gem update --system' to ".make_yellow + "update your RubyGems".make_yellow) end |
#load_gem_plugins ⇒ Object
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# File 'lib/cli/runner.rb', line 168 def load_gem_plugins get_gem_plugins.each do |plugin_path| original_commands = Config.commands.size begin next unless require_plugin plugin_path rescue Exception => e err("Failed to load plugin #{plugin_path}: #{e.}".make_red) end if Config.commands =~ original_commands say(("File #{plugin_path} has been loaded as plugin but it didn't " + "contain any commands.\nMake sure this plugin is updated to be " + "compatible with BOSH CLI 1.0.").columnize(80).make_yellow) end end end |
#load_local_plugins ⇒ Object
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# File 'lib/cli/runner.rb', line 161 def load_local_plugins Dir.glob(File.join("lib", plugins_glob)).each do |file| say("WARNING: loading local plugin: #{file}") require_plugin(file) end end |
#load_plugins ⇒ void
This method returns an undefined value.
Discover and load CLI plugins from all available gems
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# File 'lib/cli/runner.rb', line 156 def load_plugins load_local_plugins load_gem_plugins end |
#parse_global_options ⇒ Object
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# File 'lib/cli/runner.rb', line 100 def # -v is reserved for verbose but having 'bosh -v' is handy, # hence the little hack if @args.size == 1 && (@args[0] == "-v" || @args[0] == "--version") @args = %w(version) return end opts = @option_parser config_desc = "Override configuration file. Also can be overridden " + "by BOSH_CONFIG environment variable. Defaults to " + "$HOME/.bosh_config. Override precedence is command-" + "line option, then environment variable, then home directory." opts.on("-c", "--config FILE", config_desc) do |file| @options[:config] = file end opts.on("--[no-]color", "Toggle colorized output") do |v| Config.colorize = v end opts.on("-v", "--verbose", "Show additional output") do @options[:verbose] = true end opts.on("-q", "--quiet", "Suppress all output") do Config.output = nil end opts.on("-n", "--non-interactive", "Don't ask for user input") do @options[:non_interactive] = true end opts.on("-N", "--no-track", "Return Task ID and don't track") do @options[:no_track] = true end opts.on("-P", "--poll INTERVAL", "Director task polling interval") do |interval| @options[:poll_interval] = Integer(interval) end opts.on("-t", "--target URL", "Override target") do |target| @options[:target] = target end opts.on("-u", "--user USER", "Override username") do |user| @options[:username] = user end opts.on("-p", "--password PASSWORD", "Override password") do |pass| @options[:password] = pass end opts.on("-d", "--deployment FILE", "Override deployment") do |file| @options[:deployment] = file end @args = @option_parser.order!(@args) end |
#plugins_glob ⇒ Object
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# File 'lib/cli/runner.rb', line 152 def plugins_glob; "bosh/cli/commands/*.rb"; end |
#require_plugin(file) ⇒ Object
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# File 'lib/cli/runner.rb', line 196 def require_plugin(file) require File.absolute_path(file) end |
#run ⇒ void
This method returns an undefined value.
Find and run CLI command
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# File 'lib/cli/runner.rb', line 33 def run Config.interactive = !@options[:non_interactive] Config.poll_interval = @options[:poll_interval] load_plugins build_parse_tree add_shortcuts @args = %w(help) if @args.empty? command = search_parse_tree(@parse_tree) if command.nil? && Config.interactive command = try_alias end if command.nil? err("Unknown command: #{@args.join(" ")}") end command.runner = self begin exit_code = command.run(@args, @options) exit(exit_code) rescue OptionParser::ParseError => e say_err(e.) nl say_err("Usage: bosh #{command.usage_with_params.columnize(60, 7)}") nl if command. say(command..indent(7)) end exit(1) end rescue OptionParser::ParseError => e say_err(e.) say_err(@option_parser.to_s) exit(1) rescue Bosh::Cli::CliError => e say_err(e.) nl exit(e.exit_code) end |
#search_parse_tree(node) ⇒ Object
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# File 'lib/cli/runner.rb', line 229 def search_parse_tree(node) return nil if node.nil? arg = @args.shift longer_command = search_parse_tree(node[arg]) if longer_command.nil? @args.unshift(arg) if arg # backtrack if needed node.command else longer_command end end |
#try_alias ⇒ Object
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# File 'lib/cli/runner.rb', line 243 def try_alias # Tries to find best match among aliases (possibly multiple words), # then unwinds it onto the remaining args and searches parse tree again. # Not the most effective algorithm but does the job. config = Bosh::Cli::Config.new(@options[:config]) candidate = [] best_match = nil save_args = @args.dup while (arg = @args.shift) candidate << arg resolved = config.resolve_alias(:cli, candidate.join(" ")) if best_match && resolved.nil? @args.unshift(arg) break end best_match = resolved end if best_match.nil? @args = save_args return end best_match.split(/\s+/).reverse.each do |keyword| @args.unshift(keyword) end search_parse_tree(@parse_tree) end |
#usage ⇒ Object
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# File 'lib/cli/runner.rb', line 225 def usage @option_parser.to_s end |