Class: Gem::Commands::SpecificationCommand

Inherits:
Gem::Command show all
Includes:
LocalRemoteOptions, VersionOption
Defined in:
lib/rubygems/commands/specification_command.rb

Instance Attribute Summary

Attributes inherited from Gem::Command

#command, #defaults, #options, #program_name, #summary

Instance Method Summary collapse

Methods included from VersionOption

#add_platform_option, #add_prerelease_option, #add_version_option, #get_platform_from_requirements

Methods included from LocalRemoteOptions

#accept_uri_http, #add_bulk_threshold_option, #add_clear_sources_option, #add_local_remote_options, #add_proxy_option, #add_source_option, #add_update_sources_option, #both?, #local?, #remote?

Methods inherited from Gem::Command

add_common_option, #add_extra_args, #add_option, add_specific_extra_args, #begins?, build_args, build_args=, #check_deprecated_options, common_options, #deprecate_option, #deprecated?, extra_args, extra_args=, #get_all_gem_names, #get_all_gem_names_and_versions, #get_one_gem_name, #get_one_optional_argument, #handle_options, #handles?, #invoke, #invoke_with_build_args, #merge_options, #remove_option, #show_help, #show_lookup_failure, specific_extra_args, specific_extra_args_hash, specific_extra_args_hash=, #when_invoked

Methods included from UserInteraction

#alert, #alert_error, #alert_warning, #ask, #ask_for_password, #ask_yes_no, #choose_from_list, #say, #terminate_interaction, #verbose

Methods included from DefaultUserInteraction

ui, #ui, ui=, #ui=, use_ui, #use_ui

Methods included from Text

#clean_text, #format_text, #levenshtein_distance, #min3, #truncate_text

Constructor Details

#initializeSpecificationCommand

Returns a new instance of SpecificationCommand.



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
# File 'lib/rubygems/commands/specification_command.rb', line 11

def initialize
  Gem.load_yaml

  super 'specification', 'Display gem specification (in yaml)',
        :domain => :local, :version => Gem::Requirement.default,
        :format => :yaml

  add_version_option('examine')
  add_platform_option
  add_prerelease_option

  add_option('--all', 'Output specifications for all versions of',
             'the gem') do |value, options|
    options[:all] = true
  end

  add_option('--ruby', 'Output ruby format') do |value, options|
    options[:format] = :ruby
  end

  add_option('--yaml', 'Output YAML format') do |value, options|
    options[:format] = :yaml
  end

  add_option('--marshal', 'Output Marshal format') do |value, options|
    options[:format] = :marshal
  end

  add_local_remote_options
end

Instance Method Details

#argumentsObject

:nodoc:



42
43
44
45
46
47
# File 'lib/rubygems/commands/specification_command.rb', line 42

def arguments # :nodoc:
  <<-ARGS
GEMFILE       name of gem to show the gemspec for
FIELD         name of gemspec field to show
  ARGS
end

#defaults_strObject

:nodoc:



49
50
51
# File 'lib/rubygems/commands/specification_command.rb', line 49

def defaults_str # :nodoc:
  "--local --version '#{Gem::Requirement.default}' --yaml"
end

#descriptionObject

:nodoc:



53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
# File 'lib/rubygems/commands/specification_command.rb', line 53

def description # :nodoc:
  <<-EOF
The specification command allows you to extract the specification from
a gem for examination.

The specification can be output in YAML, ruby or Marshal formats.

Specific fields in the specification can be extracted in YAML format:

$ gem spec rake summary
--- Ruby based make-like utility.
...

  EOF
end

#executeObject



73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
# File 'lib/rubygems/commands/specification_command.rb', line 73

def execute
  specs = []
  gem = options[:args].shift

  unless gem
    raise Gem::CommandLineError,
          "Please specify a gem name or file on the command line"
  end

  case v = options[:version]
  when String
    req = Gem::Requirement.create v
  when Gem::Requirement
    req = v
  else
    raise Gem::CommandLineError, "Unsupported version type: '#{v}'"
  end

  if !req.none? and options[:all]
    alert_error "Specify --all or -v, not both"
    terminate_interaction 1
  end

  if options[:all]
    dep = Gem::Dependency.new gem
  else
    dep = Gem::Dependency.new gem, req
  end

  field = get_one_optional_argument

  raise Gem::CommandLineError, "--ruby and FIELD are mutually exclusive" if
    field and options[:format] == :ruby

  if local?
    if File.exist? gem
      specs << Gem::Package.new(gem).spec rescue nil
    end

    if specs.empty?
      specs.push(*dep.matching_specs)
    end
  end

  if remote?
    dep.prerelease = options[:prerelease]
    found, _ = Gem::SpecFetcher.fetcher.spec_for_dependency dep

    specs.push(*found.map {|spec,| spec })
  end

  if specs.empty?
    alert_error "No gem matching '#{dep}' found"
    terminate_interaction 1
  end

  platform = get_platform_from_requirements(options)

  if platform
    specs = specs.select{|s| s.platform.to_s == platform }
  end

  unless options[:all]
    specs = [specs.max_by {|s| s.version }]
  end

  specs.each do |s|
    s = s.send field if field

    say case options[:format]
        when :ruby then s.to_ruby
        when :marshal then Marshal.dump s
        else s.to_yaml
        end

    say "\n"
  end
end

#usageObject

:nodoc:



69
70
71
# File 'lib/rubygems/commands/specification_command.rb', line 69

def usage # :nodoc:
  "#{program_name} [GEMFILE] [FIELD]"
end