Class: Chef::Knife

Inherits:
Object show all
Extended by:
Mixin::ConvertToClassName, Forwardable
Includes:
Mixin::PathSanity, Mixlib::CLI
Defined in:
lib/chef/knife.rb,
lib/chef/knife/raw.rb,
lib/chef/knife/ssh.rb,
lib/chef/knife/diff.rb,
lib/chef/knife/help.rb,
lib/chef/knife/list.rb,
lib/chef/knife/show.rb,
lib/chef/knife/delete.rb,
lib/chef/knife/search.rb,
lib/chef/knife/status.rb,
lib/chef/knife/upload.rb,
lib/chef/knife/core/ui.rb,
lib/chef/knife/download.rb,
lib/chef/knife/tag_list.rb,
lib/chef/knife/bootstrap.rb,
lib/chef/knife/configure.rb,
lib/chef/knife/node_edit.rb,
lib/chef/knife/node_list.rb,
lib/chef/knife/node_show.rb,
lib/chef/knife/role_edit.rb,
lib/chef/knife/role_list.rb,
lib/chef/knife/role_show.rb,
lib/chef/knife/user_edit.rb,
lib/chef/knife/user_list.rb,
lib/chef/knife/user_show.rb,
lib/chef/knife/tag_create.rb,
lib/chef/knife/tag_delete.rb,
lib/chef/knife/client_edit.rb,
lib/chef/knife/client_list.rb,
lib/chef/knife/client_show.rb,
lib/chef/knife/node_create.rb,
lib/chef/knife/node_delete.rb,
lib/chef/knife/role_create.rb,
lib/chef/knife/role_delete.rb,
lib/chef/knife/user_create.rb,
lib/chef/knife/user_delete.rb,
lib/chef/knife/client_create.rb,
lib/chef/knife/client_delete.rb,
lib/chef/knife/cookbook_list.rb,
lib/chef/knife/cookbook_show.rb,
lib/chef/knife/cookbook_test.rb,
lib/chef/knife/data_bag_edit.rb,
lib/chef/knife/data_bag_list.rb,
lib/chef/knife/data_bag_show.rb,
lib/chef/knife/index_rebuild.rb,
lib/chef/knife/node_from_file.rb,
lib/chef/knife/role_from_file.rb,
lib/chef/knife/cookbook_create.rb,
lib/chef/knife/cookbook_delete.rb,
lib/chef/knife/cookbook_upload.rb,
lib/chef/knife/data_bag_create.rb,
lib/chef/knife/data_bag_delete.rb,
lib/chef/knife/user_reregister.rb,
lib/chef/knife/configure_client.rb,
lib/chef/knife/core/node_editor.rb,
lib/chef/knife/environment_edit.rb,
lib/chef/knife/environment_list.rb,
lib/chef/knife/environment_show.rb,
lib/chef/knife/node_bulk_delete.rb,
lib/chef/knife/role_bulk_delete.rb,
lib/chef/knife/client_reregister.rb,
lib/chef/knife/cookbook_download.rb,
lib/chef/knife/cookbook_metadata.rb,
lib/chef/knife/node_run_list_add.rb,
lib/chef/knife/client_bulk_delete.rb,
lib/chef/knife/cookbook_site_list.rb,
lib/chef/knife/cookbook_site_show.rb,
lib/chef/knife/core/object_loader.rb,
lib/chef/knife/data_bag_from_file.rb,
lib/chef/knife/environment_create.rb,
lib/chef/knife/environment_delete.rb,
lib/chef/knife/cookbook_site_share.rb,
lib/chef/knife/core/node_presenter.rb,
lib/chef/knife/core/text_formatter.rb,
lib/chef/knife/cookbook_bulk_delete.rb,
lib/chef/knife/cookbook_site_search.rb,
lib/chef/knife/node_run_list_remove.rb,
lib/chef/knife/cookbook_site_install.rb,
lib/chef/knife/cookbook_site_unshare.rb,
lib/chef/knife/environment_from_file.rb,
lib/chef/knife/cookbook_site_download.rb,
lib/chef/knife/core/bootstrap_context.rb,
lib/chef/knife/core/cookbook_scm_repo.rb,
lib/chef/knife/core/generic_presenter.rb,
lib/chef/knife/core/subcommand_loader.rb,
lib/chef/knife/cookbook_metadata_from_file.rb

Defined Under Namespace

Modules: Core Classes: Bootstrap, ClientBulkDelete, ClientCreate, ClientDelete, ClientEdit, ClientList, ClientReregister, ClientShow, Configure, ConfigureClient, CookbookBulkDelete, CookbookCreate, CookbookDelete, CookbookDownload, CookbookList, CookbookMetadata, CookbookMetadataFromFile, CookbookSCMRepo, CookbookShow, CookbookSiteDownload, CookbookSiteInstall, CookbookSiteList, CookbookSiteSearch, CookbookSiteShare, CookbookSiteShow, CookbookSiteUnshare, CookbookSiteVendor, CookbookTest, CookbookUpload, DataBagCreate, DataBagDelete, DataBagEdit, DataBagFromFile, DataBagList, DataBagShow, Delete, Diff, Download, EnvironmentCreate, EnvironmentDelete, EnvironmentEdit, EnvironmentFromFile, EnvironmentList, EnvironmentShow, Exec, Help, IndexRebuild, List, NodeBulkDelete, NodeCreate, NodeDelete, NodeEdit, NodeEditor, NodeFromFile, NodeList, NodeRunListAdd, NodeRunListRemove, NodeShow, Raw, RecipeList, RoleBulkDelete, RoleCreate, RoleDelete, RoleEdit, RoleFromFile, RoleList, RoleShow, Search, Show, Ssh, Status, SubcommandLoader, TagCreate, TagDelete, TagList, UI, Upload, UserCreate, UserDelete, UserEdit, UserList, UserReregister, UserShow

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Mixin::ConvertToClassName

convert_to_class_name, convert_to_snake_case, filename_to_qualified_string, snake_case_basename

Methods included from Mixin::PathSanity

#enforce_path_sanity

Constructor Details

#initialize(argv = []) ⇒ Knife

Create a new instance of the current class configured for the given arguments and options



266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
 
# File 'lib/chef/knife.rb', line 266

def initialize(argv=[])
  super() # having to call super in initialize is the most annoying anti-pattern :(
  @ui = Chef::Knife::UI.new(STDOUT, STDERR, STDIN, config)

  command_name_words = self.class.snake_case_name.split('_')

  # Mixlib::CLI ignores the embedded name_args
  @name_args = parse_options(argv)
  @name_args.delete(command_name_words.join('-'))
  @name_args.reject! { |name_arg| command_name_words.delete(name_arg) }

  # knife node run_list add requires that we have extra logic to handle
  # the case that command name words could be joined by an underscore :/
  command_name_words = command_name_words.join('_')
  @name_args.reject! { |name_arg| command_name_words == name_arg }

  if config[:help]
    msg opt_parser
    exit 1
  end

  # copy Mixlib::CLI over so that it cab be configured in knife.rb
  # config file
  Chef::Config[:verbosity] = config[:verbosity]
end

Instance Attribute Details

#name_args ⇒ Object

Returns the value of attribute name_args.



57
58
59
 
# File 'lib/chef/knife.rb', line 57

def name_args
  @name_args
end

#ui ⇒ Object

Returns the value of attribute ui.



58
59
60
 
# File 'lib/chef/knife.rb', line 58

def ui
  @ui
end

Class Method Details

.category(new_category) ⇒ Object

Explicitly set the category for the current command to new_category The category is normally determined from the first word of the command name, but some commands make more sense using two or more words

Arguments

new_category:

A String to set the category to (see examples)

Examples:

Data bag commands would be in the ‘data’ category by default. To put them in the ‘data bag’ category:

category('data bag')



93
94
95
 
# File 'lib/chef/knife.rb', line 93

def self.category(new_category)
  @category = new_category
end

.common_name ⇒ Object 



105
106
107
 
# File 'lib/chef/knife.rb', line 105

def self.common_name
  snake_case_name.split('_').join(' ')
end

.deps(&block) ⇒ Object 



204
205
206
 
# File 'lib/chef/knife.rb', line 204

def self.deps(&block)
  @dependency_loader = block
end

.guess_category(args) ⇒ Object 



176
177
178
179
180
181
182
183
184
185
186
 
# File 'lib/chef/knife.rb', line 176

def self.guess_category(args)
  category_words = args.select {|arg| arg =~ /^(([[:alnum:]])[[:alnum:]\_\-]+)$/ }
  category_words.map! {|w| w.split('-')}.flatten!
  matching_category = nil
  while (!matching_category) && (!category_words.empty?)
    candidate_category = category_words.join(' ')
    matching_category = candidate_category if subcommands_by_category.key?(candidate_category)
    matching_category || category_words.pop
  end
  matching_category
end

.inherited(subclass) ⇒ Object 



78
79
80
81
82
 
# File 'lib/chef/knife.rb', line 78

def self.inherited(subclass)
  unless subclass.unnamed?
    subcommands[subclass.snake_case_name] = subclass
  end
end

.list_commands(preferred_category = nil) ⇒ Object

Print the list of subcommands knife knows about. If preferred_category is given, only subcommands in that category are shown



138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
 
# File 'lib/chef/knife.rb', line 138

def self.list_commands(preferred_category=nil)
  load_commands

  category_desc = preferred_category ? preferred_category + " " : ''
  msg "Available #{category_desc}subcommands: (for details, knife SUB-COMMAND --help)\n\n"

  if preferred_category && subcommands_by_category.key?(preferred_category)
    commands_to_show = {preferred_category => subcommands_by_category[preferred_category]}
  else
    commands_to_show = subcommands_by_category
  end

  commands_to_show.sort.each do |category, commands|
    next if category =~ /deprecated/i
    msg "** #{category.upcase} COMMANDS **"
    commands.each do |command|
      msg subcommands[command].banner if subcommands[command]
    end
    msg
  end
end

.load_commands ⇒ Object 



118
119
120
 
# File 'lib/chef/knife.rb', line 118

def self.load_commands
  @commands_loaded ||= subcommand_loader.load_commands
end

.load_deps ⇒ Object 



208
209
210
 
# File 'lib/chef/knife.rb', line 208

def self.load_deps
  @dependency_loader && @dependency_loader.call
end

.msg(msg = "") ⇒ Object 



69
70
71
 
# File 'lib/chef/knife.rb', line 69

def self.msg(msg="")
  ui.msg(msg)
end

.reset_subcommands! ⇒ Object 



73
74
75
76
 
# File 'lib/chef/knife.rb', line 73

def self.reset_subcommands!
  @@subcommands = {}
  @subcommands_by_category = nil
end

.run(args, options = {}) ⇒ Object

Run knife for the given args (ARGV), adding options to the list of CLI options that the subcommand knows how to handle.

Arguments

args:

usually ARGV

options:

A Mixlib::CLI option parser hash. These options are how

subcommands know about global knife CLI options



166
167
168
169
170
171
172
173
174
 
# File 'lib/chef/knife.rb', line 166

def self.run(args, options={})
  load_commands
  subcommand_class = subcommand_class_from(args)
  subcommand_class.options = options.merge!(subcommand_class.options)
  subcommand_class.load_deps
  instance = subcommand_class.new(args)
  instance.configure_chef
  instance.run_with_pretty_exceptions
end

.snake_case_name ⇒ Object 



101
102
103
 
# File 'lib/chef/knife.rb', line 101

def self.snake_case_name
  convert_to_snake_case(name.split('::').last) unless unnamed?
end

.subcommand_category ⇒ Object 



97
98
99
 
# File 'lib/chef/knife.rb', line 97

def self.subcommand_category
  @category || snake_case_name.split('_').first unless unnamed?
end

.subcommand_class_from(args) ⇒ Object 



188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
 
# File 'lib/chef/knife.rb', line 188

def self.subcommand_class_from(args)
  command_words = args.select {|arg| arg =~ /^(([[:alnum:]])[[:alnum:]\_\-]+)$/ }

  subcommand_class = nil

  while ( !subcommand_class ) && ( !command_words.empty? )
    snake_case_class_name = command_words.join("_")
    unless subcommand_class = subcommands[snake_case_class_name]
      command_words.pop
    end
  end
  # see if we got the command as e.g., knife node-list
  subcommand_class ||= subcommands[args.first.gsub('-', '_')]
  subcommand_class || subcommand_not_found!(args)
end

.subcommand_loader ⇒ Object 



114
115
116
 
# File 'lib/chef/knife.rb', line 114

def self.subcommand_loader
  @subcommand_loader ||= Knife::SubcommandLoader.new(chef_config_dir)
end

.subcommands ⇒ Object 



122
123
124
 
# File 'lib/chef/knife.rb', line 122

def self.subcommands
  @@subcommands ||= {}
end

.subcommands_by_category ⇒ Object 



126
127
128
129
130
131
132
133
134
 
# File 'lib/chef/knife.rb', line 126

def self.subcommands_by_category
  unless @subcommands_by_category
    @subcommands_by_category = Hash.new { |hash, key| hash[key] = [] }
    subcommands.each do |snake_cased, klass|
      @subcommands_by_category[klass.subcommand_category] << snake_cased
    end
  end
  @subcommands_by_category
end

.ui ⇒ Object 



65
66
67
 
# File 'lib/chef/knife.rb', line 65

def self.ui
  @ui ||= Chef::Knife::UI.new(STDOUT, STDERR, STDIN, {})
end

.unnamed? ⇒ Boolean

Does this class have a name? (Classes created via Class.new don’t)

Returns:

  • (Boolean) 


110
111
112
 
# File 'lib/chef/knife.rb', line 110

def self.unnamed?
  name.nil? || name.empty?
end

.use_separate_defaults? ⇒ Boolean

Configure mixlib-cli to always separate defaults from user-supplied CLI options

Returns:

  • (Boolean) 


61
62
63
 
# File 'lib/chef/knife.rb', line 61

def self.use_separate_defaults?
  true
end

Instance Method Details

#api_key ⇒ Object 



523
524
525
 
# File 'lib/chef/knife.rb', line 523

def api_key
  Chef::Config[:client_key]
end

#apply_computed_config ⇒ Object

Catch-all method that does any massaging needed for various config components, such as expanding file paths and converting verbosity level into log level.



359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
 
# File 'lib/chef/knife.rb', line 359

def apply_computed_config
  Chef::Config[:color] = config[:color]

  case Chef::Config[:verbosity]
  when 0, nil
    Chef::Config[:log_level] = :error
  when 1
    Chef::Config[:log_level] = :info
  else
    Chef::Config[:log_level] = :debug
  end

  Chef::Config[:node_name]         = config[:node_name]       if config[:node_name]
  Chef::Config[:client_key]        = config[:client_key]      if config[:client_key]
  Chef::Config[:chef_server_url]   = config[:chef_server_url] if config[:chef_server_url]
  Chef::Config[:environment]       = config[:environment]     if config[:environment]

  # Expand a relative path from the config directory. Config from command
  # line should already be expanded, and absolute paths will be unchanged.
  if Chef::Config[:client_key] && config[:config_file]
    Chef::Config[:client_key] = File.expand_path(Chef::Config[:client_key], File.dirname(config[:config_file]))
  end

  Mixlib::Log::Formatter.show_time = false
  Chef::Log.init(Chef::Config[:log_location])
  Chef::Log.level(Chef::Config[:log_level] || :error)

  if Chef::Config[:node_name] && Chef::Config[:node_name].bytesize > 90
    # node names > 90 bytes only work with authentication protocol >= 1.1
    # see discussion in config.rb.
    Chef::Config[:authentication_protocol_version] = "1.1"
  end
end

#config_file_settings ⇒ Object

Returns a subset of the Chef::Config Hash that is relevant to the currently executing knife command. This is used by #configure_chef to apply settings from knife.rb to the config hash.



303
304
305
306
307
308
309
 
# File 'lib/chef/knife.rb', line 303

def config_file_settings
  config_file_settings = {}
  self.class.options.keys.each do |key|
    config_file_settings[key] = Chef::Config[:knife][key] if Chef::Config[:knife].has_key?(key)
  end
  config_file_settings
end

#configure_chef ⇒ Object 



393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
 
# File 'lib/chef/knife.rb', line 393

def configure_chef
  unless config[:config_file]
    locate_config_file
  end

  # Don't try to load a knife.rb if it doesn't exist.
  if config[:config_file]
    Chef::Log.debug("Using configuration from #{config[:config_file]}")
    read_config_file(config[:config_file])
  else
    # ...but do log a message if no config was found.
    Chef::Config[:color] = config[:color]
    ui.warn("No knife configuration file found")
  end

  merge_configs
  apply_computed_config
end

#create_object(object, pretty_name = nil, &block) ⇒ Object 



537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
 
# File 'lib/chef/knife.rb', line 537

def create_object(object, pretty_name=nil, &block)
  output = edit_data(object)

  if Kernel.block_given?
    output = block.call(output)
  else
    output.save
  end

  pretty_name ||= output

  self.msg("Created #{pretty_name}")

  output(output) if config[:print_after]
end

#delete_object(klass, name, delete_name = nil, &block) ⇒ Object 



553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
 
# File 'lib/chef/knife.rb', line 553

def delete_object(klass, name, delete_name=nil, &block)
  confirm("Do you really want to delete #{name}")

  if Kernel.block_given?
    object = block.call
  else
    object = klass.load(name)
    object.destroy
  end

  output(format_for_display(object)) if config[:print_after]

  obj_name = delete_name ? "#{delete_name}[#{name}]" : object
  self.msg("Deleted #{obj_name}")
end

#format_rest_error(response) ⇒ Object

Parses JSON from the error response sent by Chef Server and returns the error message – TODO: this code belongs in Chef::REST



531
532
533
534
535
 
# File 'lib/chef/knife.rb', line 531

def format_rest_error(response)
  Array(Chef::JSONCompat.from_json(response.body)["error"]).join('; ')
rescue Exception
  response.body
end

#highlight_config_error(file, line) ⇒ Object 



435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
 
# File 'lib/chef/knife.rb', line 435

def highlight_config_error(file, line)
  config_file_lines = []
  IO.readlines(file).each_with_index {|l, i| config_file_lines << "#{(i + 1).to_s.rjust(3)}: #{l.chomp}"}
  if line == 1
    lines = config_file_lines[0..3]
    lines[0] = ui.color(lines[0], :red)
  else
    lines = config_file_lines[Range.new(line - 2, line)]
    lines[1] = ui.color(lines[1], :red)
  end
  ui.msg ""
  ui.msg ui.color("     # #{file}", :white)
  lines.each {|l| ui.msg(l)}
  ui.msg ""
end

#humanize_exception(e) ⇒ Object 



467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
 
# File 'lib/chef/knife.rb', line 467

def humanize_exception(e)
  case e
  when SystemExit
    raise # make sure exit passes through.
  when Net::HTTPServerException, Net::HTTPFatalError
    humanize_http_exception(e)
  when Errno::ECONNREFUSED, Timeout::Error, Errno::ETIMEDOUT, SocketError
    ui.error "Network Error: #{e.message}"
    ui.info "Check your knife configuration and network settings"
  when NameError, NoMethodError
    ui.error "knife encountered an unexpected error"
    ui.info  "This may be a bug in the '#{self.class.common_name}' knife command or plugin"
    ui.info  "Please collect the output of this command with the `-VV` option before filing a bug report."
    ui.info  "Exception: #{e.class.name}: #{e.message}"
  when Chef::Exceptions::PrivateKeyMissing
    ui.error "Your private key could not be loaded from #{api_key}"
    ui.info  "Check your configuration file and ensure that your private key is readable"
  else
    ui.error "#{e.class.name}: #{e.message}"
  end
end

#humanize_http_exception(e) ⇒ Object 



489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
 
# File 'lib/chef/knife.rb', line 489

def humanize_http_exception(e)
  response = e.response
  case response
  when Net::HTTPUnauthorized
    ui.error "Failed to authenticate to #{server_url} as #{username} with key #{api_key}"
    ui.info "Response:  #{format_rest_error(response)}"
  when Net::HTTPForbidden
    ui.error "You authenticated successfully to #{server_url} as #{username} but you are not authorized for this action"
    ui.info "Response:  #{format_rest_error(response)}"
  when Net::HTTPBadRequest
    ui.error "The data in your request was invalid"
    ui.info "Response: #{format_rest_error(response)}"
  when Net::HTTPNotFound
    ui.error "The object you are looking for could not be found"
    ui.info "Response: #{format_rest_error(response)}"
  when Net::HTTPInternalServerError
    ui.error "internal server error"
    ui.info "Response: #{format_rest_error(response)}"
  when Net::HTTPBadGateway
    ui.error "bad gateway"
    ui.info "Response: #{format_rest_error(response)}"
  when Net::HTTPServiceUnavailable
    ui.error "Service temporarily unavailable"
    ui.info "Response: #{format_rest_error(response)}"
  else
    ui.error response.message
    ui.info "Response: #{format_rest_error(response)}"
  end
end

#locate_config_file ⇒ Object 



311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
 
# File 'lib/chef/knife.rb', line 311

def locate_config_file
  candidate_configs = []

  # Look for $KNIFE_HOME/knife.rb (allow multiple knives config on same machine)
  if ENV['KNIFE_HOME']
    candidate_configs << File.join(ENV['KNIFE_HOME'], 'knife.rb')
  end
  # Look for $PWD/knife.rb
  if Dir.pwd
    candidate_configs << File.join(Dir.pwd, 'knife.rb')
  end
  # Look for $UPWARD/.chef/knife.rb
  if self.class.chef_config_dir
    candidate_configs << File.join(self.class.chef_config_dir, 'knife.rb')
  end
  # Look for $HOME/.chef/knife.rb
  if ENV['HOME']
    candidate_configs << File.join(ENV['HOME'], '.chef', 'knife.rb')
  end

  candidate_configs.each do | candidate_config |
    candidate_config = File.expand_path(candidate_config)
    if File.exist?(candidate_config)
      config[:config_file] = candidate_config
      break
    end
  end
end

#merge_configs ⇒ Object

Apply Config in this order: defaults from mixlib-cli settings from config file, via Chef::Config config from command line



344
345
346
347
348
349
350
351
352
353
354
 
# File 'lib/chef/knife.rb', line 344

def merge_configs
  # Apply config file settings on top of mixlib-cli defaults
  combined_config = default_config.merge(config_file_settings)
  # Apply user-supplied options on top of the above combination
  combined_config = combined_config.merge(config)
  # replace the config hash from mixlib-cli with our own.
  # Need to use the mutate-in-place #replace method instead of assigning to
  # the instance variable because other code may have a reference to the
  # original config hash object.
  config.replace(combined_config)
end

#noauth_rest ⇒ Object 



576
577
578
579
580
581
 
# File 'lib/chef/knife.rb', line 576

def noauth_rest
  @rest ||= begin
    require 'chef/rest'
    Chef::REST.new(Chef::Config[:chef_server_url], false, false)
  end
end

#parse_options(args) ⇒ Object 



292
293
294
295
296
297
298
 
# File 'lib/chef/knife.rb', line 292

def parse_options(args)
  super
rescue OptionParser::InvalidOption => e
  puts "Error: " + e.to_s
  show_usage
  exit(1)
end

#read_config_file(file) ⇒ Object 



412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
 
# File 'lib/chef/knife.rb', line 412

def read_config_file(file)
  Chef::Config.from_file(file)
rescue SyntaxError => e
  ui.error "You have invalid ruby syntax in your config file #{file}"
  ui.info(ui.color(e.message, :red))
  if file_line = e.message[/#{Regexp.escape(file)}:[\d]+/]
    line = file_line[/:([\d]+)$/, 1].to_i
    highlight_config_error(file, line)
  end
  exit 1
rescue Exception => e
  ui.error "You have an error in your config file #{file}"
  ui.info "#{e.class.name}: #{e.message}"
  filtered_trace = e.backtrace.grep(/#{Regexp.escape(file)}/)
  filtered_trace.each {|line| ui.msg("  " + ui.color(line, :red))}
  if !filtered_trace.empty?
    line_nr = filtered_trace.first[/#{Regexp.escape(file)}:([\d]+)/, 1]
    highlight_config_error(file, line_nr.to_i)
  end

  exit 1
end

#rest ⇒ Object 



569
570
571
572
573
574
 
# File 'lib/chef/knife.rb', line 569

def rest
  @rest ||= begin
    require 'chef/rest'
    Chef::REST.new(Chef::Config[:chef_server_url])
  end
end

#run_with_pretty_exceptions ⇒ Object 



455
456
457
458
459
460
461
462
463
464
465
 
# File 'lib/chef/knife.rb', line 455

def run_with_pretty_exceptions
  unless self.respond_to?(:run)
    ui.error "You need to add a #run method to your knife command before you can use it"
  end
  enforce_path_sanity
  run
rescue Exception => e
  raise if Chef::Config[:verbosity] == 2
  humanize_exception(e)
  exit 100
end

#server_url ⇒ Object 



583
584
585
 
# File 'lib/chef/knife.rb', line 583

def server_url
  Chef::Config[:chef_server_url]
end

#show_usage ⇒ Object 



451
452
453
 
# File 'lib/chef/knife.rb', line 451

def show_usage
  stdout.puts("USAGE: " + self.opt_parser.to_s)
end

#username ⇒ Object 



519
520
521
 
# File 'lib/chef/knife.rb', line 519

def username
  Chef::Config[:node_name]
end