summaryrefslogtreecommitdiff
path: root/lib/rubygems/request_set.rb
blob: cfbc955ed9221e7f5ba38cf431b59df0e7bcf6b4 (plain)
1
2
3
4
5
6
7
8
9
10
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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
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
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
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
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
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
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
require 'tsort'

##
# A RequestSet groups a request to activate a set of dependencies.
#
#   nokogiri = Gem::Dependency.new 'nokogiri', '~> 1.6'
#   pg = Gem::Dependency.new 'pg', '~> 0.14'
#
#   set = Gem::RequestSet.new nokogiri, pg
#
#   requests = set.resolve
#
#   p requests.map { |r| r.full_name }
#   #=> ["nokogiri-1.6.0", "mini_portile-0.5.1", "pg-0.17.0"]

class Gem::RequestSet

  include TSort

  ##
  # Array of gems to install even if already installed

  attr_accessor :always_install

  attr_reader :dependencies

  attr_accessor :development

  ##
  # Errors fetching gems during resolution.

  attr_reader :errors

  ##
  # Set to true if you want to install only direct development dependencies.

  attr_accessor :development_shallow

  ##
  # The set of git gems imported via load_gemdeps.

  attr_reader :git_set # :nodoc:

  ##
  # When true, dependency resolution is not performed, only the requested gems
  # are installed.

  attr_accessor :ignore_dependencies

  attr_reader :install_dir # :nodoc:

  ##
  # If true, allow dependencies to match prerelease gems.

  attr_accessor :prerelease

  ##
  # When false no remote sets are used for resolving gems.

  attr_accessor :remote

  attr_reader :resolver # :nodoc:

  ##
  # Sets used for resolution

  attr_reader :sets # :nodoc:

  ##
  # Treat missing dependencies as silent errors

  attr_accessor :soft_missing

  ##
  # The set of vendor gems imported via load_gemdeps.

  attr_reader :vendor_set # :nodoc:

  ##
  # Creates a RequestSet for a list of Gem::Dependency objects, +deps+.  You
  # can then #resolve and #install the resolved list of dependencies.
  #
  #   nokogiri = Gem::Dependency.new 'nokogiri', '~> 1.6'
  #   pg = Gem::Dependency.new 'pg', '~> 0.14'
  #
  #   set = Gem::RequestSet.new nokogiri, pg

  def initialize *deps
    @dependencies = deps

    @always_install      = []
    @conservative        = false
    @dependency_names    = {}
    @development         = false
    @development_shallow = false
    @errors              = []
    @git_set             = nil
    @ignore_dependencies = false
    @install_dir         = Gem.dir
    @prerelease          = false
    @remote              = true
    @requests            = []
    @sets                = []
    @soft_missing        = false
    @sorted              = nil
    @specs               = nil
    @vendor_set          = nil

    yield self if block_given?
  end

  ##
  # Declare that a gem of name +name+ with +reqs+ requirements is needed.

  def gem name, *reqs
    if dep = @dependency_names[name] then
      dep.requirement.concat reqs
    else
      dep = Gem::Dependency.new name, *reqs
      @dependency_names[name] = dep
      @dependencies << dep
    end
  end

  ##
  # Add +deps+ Gem::Dependency objects to the set.

  def import deps
    @dependencies.concat deps
  end

  ##
  # Installs gems for this RequestSet using the Gem::Installer +options+.
  #
  # If a +block+ is given an activation +request+ and +installer+ are yielded.
  # The +installer+ will be +nil+ if a gem matching the request was already
  # installed.

  def install options, &block # :yields: request, installer
    if dir = options[:install_dir]
      requests = install_into dir, false, options, &block
      return requests
    end

    cache_dir = options[:cache_dir] || Gem.dir
    @prerelease = options[:prerelease]

    requests = []

    sorted_requests.each do |req|
      if req.installed? then
        req.spec.spec.build_extensions

        if @always_install.none? { |spec| spec == req.spec.spec } then
          yield req, nil if block_given?
          next
        end
      end

      path = req.download cache_dir

      inst = Gem::Installer.new path, options

      yield req, inst if block_given?

      requests << inst.install
    end

    requests
  ensure
    raise if $!
    return requests if options[:gemdeps]

    specs = requests.map do |request|
      case request
      when Gem::Resolver::ActivationRequest then
        request.spec.spec
      else
        request
      end
    end

    require 'rubygems/dependency_installer'
    inst = Gem::DependencyInstaller.new options
    inst.installed_gems.replace specs

    Gem.done_installing_hooks.each do |hook|
      hook.call inst, specs
    end unless Gem.done_installing_hooks.empty?
  end

  ##
  # Installs from the gem dependencies files in the +:gemdeps+ option in
  # +options+, yielding to the +block+ as in #install.
  #
  # If +:without_groups+ is given in the +options+, those groups in the gem
  # dependencies file are not used.  See Gem::Installer for other +options+.

  def install_from_gemdeps options, &block
    gemdeps = options[:gemdeps]

    @install_dir = options[:install_dir] || Gem.dir
    @prerelease  = options[:prerelease]
    @remote      = options[:domain] != :local
    @conservative = true if options[:conservative]

    gem_deps_api = load_gemdeps gemdeps, options[:without_groups], true

    resolve

    if options[:explain]
      puts "Gems to install:"

      sorted_requests.each do |spec|
        puts "  #{spec.full_name}"
      end

      if Gem.configuration.really_verbose
        @resolver.stats.display
      end
    else
      installed = install options, &block

      if options.fetch :lock, true then
        lockfile =
          Gem::RequestSet::Lockfile.build self, gemdeps, gem_deps_api.dependencies
        lockfile.write
      end

      installed
    end
  end

  def install_into dir, force = true, options = {}
    gem_home, ENV['GEM_HOME'] = ENV['GEM_HOME'], dir

    existing = force ? [] : specs_in(dir)
    existing.delete_if { |s| @always_install.include? s }

    dir = File.expand_path dir

    installed = []

    options[:development] = false
    options[:install_dir] = dir
    options[:only_install_dir] = true
    @prerelease = options[:prerelease]

    sorted_requests.each do |request|
      spec = request.spec

      if existing.find { |s| s.full_name == spec.full_name } then
        yield request, nil if block_given?
        next
      end

      spec.install options do |installer|
        yield request, installer if block_given?
      end

      installed << request
    end

    installed
  ensure
    ENV['GEM_HOME'] = gem_home
  end

  ##
  # Load a dependency management file.

  def load_gemdeps path, without_groups = [], installing = false
    @git_set    = Gem::Resolver::GitSet.new
    @vendor_set = Gem::Resolver::VendorSet.new

    @git_set.root_dir = @install_dir

    lock_file = "#{File.expand_path(path)}.lock".untaint
    begin
      tokenizer = Gem::RequestSet::Lockfile::Tokenizer.from_file lock_file
      parser = tokenizer.make_parser self, []
      parser.parse
    rescue Errno::ENOENT
    end

    gf = Gem::RequestSet::GemDependencyAPI.new self, path
    gf.installing = installing
    gf.without_groups = without_groups if without_groups
    gf.load
  end

  def pretty_print q # :nodoc:
    q.group 2, '[RequestSet:', ']' do
      q.breakable

      if @remote then
        q.text 'remote'
        q.breakable
      end

      if @prerelease then
        q.text 'prerelease'
        q.breakable
      end

      if @development_shallow then
        q.text 'shallow development'
        q.breakable
      elsif @development then
        q.text 'development'
        q.breakable
      end

      if @soft_missing then
        q.text 'soft missing'
      end

      q.group 2, '[dependencies:', ']' do
        q.breakable
        @dependencies.map do |dep|
          q.text dep.to_s
          q.breakable
        end
      end

      q.breakable
      q.text 'sets:'

      q.breakable
      q.pp @sets.map { |set| set.class }
    end
  end

  ##
  # Resolve the requested dependencies and return an Array of Specification
  # objects to be activated.

  def resolve set = Gem::Resolver::BestSet.new
    @sets << set
    @sets << @git_set
    @sets << @vendor_set

    set = Gem::Resolver.compose_sets(*@sets)
    set.remote = @remote
    set.prerelease = @prerelease

    resolver = Gem::Resolver.new @dependencies, set
    resolver.development         = @development
    resolver.development_shallow = @development_shallow
    resolver.ignore_dependencies = @ignore_dependencies
    resolver.soft_missing        = @soft_missing

    if @conservative
      installed_gems = {}
      Gem::Specification.find_all do |spec|
        (installed_gems[spec.name] ||= []) << spec
      end
      resolver.skip_gems = installed_gems
    end

    @resolver = resolver

    @requests = resolver.resolve

    @errors = set.errors

    @requests
  end

  ##
  # Resolve the requested dependencies against the gems available via Gem.path
  # and return an Array of Specification objects to be activated.

  def resolve_current
    resolve Gem::Resolver::CurrentSet.new
  end

  def sorted_requests
    @sorted ||= strongly_connected_components.flatten
  end

  def specs
    @specs ||= @requests.map { |r| r.full_spec }
  end

  def specs_in dir
    Dir["#{dir}/specifications/*.gemspec"].map do |g|
      Gem::Specification.load g
    end
  end

  def tsort_each_node &block # :nodoc:
    @requests.each(&block)
  end

  def tsort_each_child node # :nodoc:
    node.spec.dependencies.each do |dep|
      next if dep.type == :development and not @development

      match = @requests.find { |r|
        dep.match? r.spec.name, r.spec.version, @prerelease
      }

      unless match then
        next if dep.type == :development and @development_shallow
        next if @soft_missing
        raise Gem::DependencyError,
              "Unresolved dependency found during sorting - #{dep} (requested by #{node.spec.full_name})"
      end

      yield match
    end
  end

end

require 'rubygems/request_set/gem_dependency_api'
require 'rubygems/request_set/lockfile'
require 'rubygems/request_set/lockfile/tokenizer'