summaryrefslogtreecommitdiff
path: root/lib/rubygems/dependency_installer.rb
blob: 954e2bf9841d3a658d08db0f09ad197a38915fa6 (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
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
# frozen_string_literal: false
require 'rubygems'
require 'rubygems/dependency_list'
require 'rubygems/package'
require 'rubygems/installer'
require 'rubygems/spec_fetcher'
require 'rubygems/user_interaction'
require 'rubygems/source'
require 'rubygems/available_set'

##
# Installs a gem along with all its dependencies from local and remote gems.

class Gem::DependencyInstaller

  include Gem::UserInteraction

  DEFAULT_OPTIONS = { # :nodoc:
    :env_shebang         => false,
    :document            => %w[ri],
    :domain              => :both, # HACK dup
    :force               => false,
    :format_executable   => false, # HACK dup
    :ignore_dependencies => false,
    :prerelease          => false,
    :security_policy     => nil, # HACK NoSecurity requires OpenSSL. AlmostNo? Low?
    :wrappers            => true,
    :build_args          => nil,
    :build_docs_in_background => false,
    :install_as_default  => false
  }.freeze

  ##
  # Documentation types.  For use by the Gem.done_installing hook

  attr_reader :document

  ##
  # Errors from SpecFetcher while searching for remote specifications

  attr_reader :errors

  ##
  #--
  # TODO remove, no longer used

  attr_reader :gems_to_install # :nodoc:

  ##
  # List of gems installed by #install in alphabetic order

  attr_reader :installed_gems

  ##
  # Creates a new installer instance.
  #
  # Options are:
  # :cache_dir:: Alternate repository path to store .gem files in.
  # :domain:: :local, :remote, or :both.  :local only searches gems in the
  #           current directory.  :remote searches only gems in Gem::sources.
  #           :both searches both.
  # :env_shebang:: See Gem::Installer::new.
  # :force:: See Gem::Installer#install.
  # :format_executable:: See Gem::Installer#initialize.
  # :ignore_dependencies:: Don't install any dependencies.
  # :install_dir:: See Gem::Installer#install.
  # :prerelease:: Allow prerelease versions.  See #install.
  # :security_policy:: See Gem::Installer::new and Gem::Security.
  # :user_install:: See Gem::Installer.new
  # :wrappers:: See Gem::Installer::new
  # :build_args:: See Gem::Installer::new

  def initialize options = {}
    @only_install_dir = !!options[:install_dir]
    @install_dir = options[:install_dir] || Gem.dir
    @build_root = options[:build_root]

    options = DEFAULT_OPTIONS.merge options

    @bin_dir             = options[:bin_dir]
    @dev_shallow         = options[:dev_shallow]
    @development         = options[:development]
    @document            = options[:document]
    @domain              = options[:domain]
    @env_shebang         = options[:env_shebang]
    @force               = options[:force]
    @format_executable   = options[:format_executable]
    @ignore_dependencies = options[:ignore_dependencies]
    @prerelease          = options[:prerelease]
    @security_policy     = options[:security_policy]
    @user_install        = options[:user_install]
    @wrappers            = options[:wrappers]
    @build_args          = options[:build_args]
    @build_docs_in_background = options[:build_docs_in_background]
    @install_as_default  = options[:install_as_default]

    # Indicates that we should not try to update any deps unless
    # we absolutely must.
    @minimal_deps        = options[:minimal_deps]

    @available      = nil
    @installed_gems = []
    @toplevel_specs = nil

    @cache_dir = options[:cache_dir] || @install_dir

    @errors = []
  end

  ##
  #--
  # TODO remove, no longer used

  def add_found_dependencies to_do, dependency_list # :nodoc:
    seen = {}
    dependencies = Hash.new { |h, name| h[name] = Gem::Dependency.new name }

    until to_do.empty? do
      spec = to_do.shift

      # HACK why is spec nil?
      next if spec.nil? or seen[spec.name]
      seen[spec.name] = true

      deps = spec.runtime_dependencies

      if @development
        if @dev_shallow
          if @toplevel_specs.include? spec.full_name
            deps |= spec.development_dependencies
          end
        else
          deps |= spec.development_dependencies
        end
      end

      deps.each do |dep|
        dependencies[dep.name] = dependencies[dep.name].merge dep

        if @minimal_deps
          next if Gem::Specification.any? do |installed_spec|
                    dep.name == installed_spec.name and
                      dep.requirement.satisfied_by? installed_spec.version
                  end
        end

        results = find_gems_with_sources(dep)

        results.sorted.each do |t|
          to_do.push t.spec
        end

        results.remove_installed! dep

        @available << results
        results.inject_into_list dependency_list
      end
    end

    dependency_list.remove_specs_unsatisfied_by dependencies
  end

  ##
  # Creates an AvailableSet to install from based on +dep_or_name+ and
  # +version+

  def available_set_for dep_or_name, version # :nodoc:
    if String === dep_or_name then
      find_spec_by_name_and_version dep_or_name, version, @prerelease
    else
      dep = dep_or_name.dup
      dep.prerelease = @prerelease
      @available = find_gems_with_sources dep
    end

    @available.pick_best!
  end

  ##
  # Indicated, based on the requested domain, if local
  # gems should be considered.

  def consider_local?
    @domain == :both or @domain == :local
  end

  ##
  # Indicated, based on the requested domain, if remote
  # gems should be considered.

  def consider_remote?
    @domain == :both or @domain == :remote
  end

  ##
  # Returns a list of pairs of gemspecs and source_uris that match
  # Gem::Dependency +dep+ from both local (Dir.pwd) and remote (Gem.sources)
  # sources.  Gems are sorted with newer gems preferred over older gems, and
  # local gems preferred over remote gems.

  def find_gems_with_sources dep, best_only=false # :nodoc:
    set = Gem::AvailableSet.new

    if consider_local?
      sl = Gem::Source::Local.new

      if spec = sl.find_gem(dep.name)
        if dep.matches_spec? spec
          set.add spec, sl
        end
      end
    end

    if consider_remote?
      begin
        # TODO this is pulled from #spec_for_dependency to allow
        # us to filter tuples before fetching specs.
        #
        tuples, errors = Gem::SpecFetcher.fetcher.search_for_dependency dep

        if best_only && !tuples.empty?
          tuples.sort! do |a,b|
            if b[0].version == a[0].version
              if b[0].platform != Gem::Platform::RUBY
                1
              else
                -1
              end
            else
              b[0].version <=> a[0].version
            end
          end
          tuples = [tuples.first]
        end

        specs = []
        tuples.each do |tup, source|
          begin
            spec = source.fetch_spec(tup)
          rescue Gem::RemoteFetcher::FetchError => e
            errors << Gem::SourceFetchProblem.new(source, e)
          else
            specs << [spec, source]
          end
        end

        if @errors
          @errors += errors
        else
          @errors = errors
        end

        set << specs

      rescue Gem::RemoteFetcher::FetchError => e
        # FIX if there is a problem talking to the network, we either need to always tell
        # the user (no really_verbose) or fail hard, not silently tell them that we just
        # couldn't find their requested gem.
        verbose do
          "Error fetching remote data:\t\t#{e.message}\n" \
            "Falling back to local-only install"
        end
        @domain = :local
      end
    end

    set
  end

  ##
  # Finds a spec and the source_uri it came from for gem +gem_name+ and
  # +version+.  Returns an Array of specs and sources required for
  # installation of the gem.

  def find_spec_by_name_and_version gem_name,
                                    version = Gem::Requirement.default,
                                    prerelease = false
    set = Gem::AvailableSet.new

    if consider_local?
      if gem_name =~ /\.gem$/ and File.file? gem_name then
        src = Gem::Source::SpecificFile.new(gem_name)
        set.add src.spec, src
      elsif gem_name =~ /\.gem$/ then
        Dir[gem_name].each do |name|
          begin
            src = Gem::Source::SpecificFile.new name
            set.add src.spec, src
          rescue Gem::Package::FormatError
          end
        end
      else
        local = Gem::Source::Local.new

        if s = local.find_gem(gem_name, version)
          set.add s, local
        end
      end
    end

    if set.empty?
      dep = Gem::Dependency.new gem_name, version
      dep.prerelease = true if prerelease

      set = find_gems_with_sources(dep, true)
      set.match_platform!
    end

    if set.empty?
      raise Gem::SpecificGemNotFoundException.new(gem_name, version, @errors)
    end

    @available = set
  end

  ##
  # Gathers all dependencies necessary for the installation from local and
  # remote sources unless the ignore_dependencies was given.
  #--
  # TODO remove at RubyGems 3

  def gather_dependencies # :nodoc:
    specs = @available.all_specs

    # these gems were listed by the user, always install them
    keep_names = specs.map { |spec| spec.full_name }

    if @dev_shallow
      @toplevel_specs = keep_names
    end

    dependency_list = Gem::DependencyList.new @development
    dependency_list.add(*specs)
    to_do = specs.dup
    add_found_dependencies to_do, dependency_list unless @ignore_dependencies

    # REFACTOR maybe abstract away using Gem::Specification.include? so
    # that this isn't dependent only on the currently installed gems
    dependency_list.specs.reject! { |spec|
      not keep_names.include?(spec.full_name) and
      Gem::Specification.include?(spec)
    }

    unless dependency_list.ok? or @ignore_dependencies or @force then
      reason = dependency_list.why_not_ok?.map { |k,v|
        "#{k} requires #{v.join(", ")}"
      }.join("; ")
      raise Gem::DependencyError, "Unable to resolve dependencies: #{reason}"
    end

    @gems_to_install = dependency_list.dependency_order.reverse
  end

  def in_background what # :nodoc:
    fork_happened = false
    if @build_docs_in_background and Process.respond_to?(:fork)
      begin
        Process.fork do
          yield
        end
        fork_happened = true
        say "#{what} in a background process."
      rescue NotImplementedError
      end
    end
    yield unless fork_happened
  end

  ##
  # Installs the gem +dep_or_name+ and all its dependencies.  Returns an Array
  # of installed gem specifications.
  #
  # If the +:prerelease+ option is set and there is a prerelease for
  # +dep_or_name+ the prerelease version will be installed.
  #
  # Unless explicitly specified as a prerelease dependency, prerelease gems
  # that +dep_or_name+ depend on will not be installed.
  #
  # If c-1.a depends on b-1 and a-1.a and there is a gem b-1.a available then
  # c-1.a, b-1 and a-1.a will be installed.  b-1.a will need to be installed
  # separately.

  def install dep_or_name, version = Gem::Requirement.default
    request_set = resolve_dependencies dep_or_name, version

    @installed_gems = []

    options = {
      :bin_dir             => @bin_dir,
      :build_args          => @build_args,
      :document            => @document,
      :env_shebang         => @env_shebang,
      :force               => @force,
      :format_executable   => @format_executable,
      :ignore_dependencies => @ignore_dependencies,
      :prerelease          => @prerelease,
      :security_policy     => @security_policy,
      :user_install        => @user_install,
      :wrappers            => @wrappers,
      :build_root          => @build_root,
      :install_as_default  => @install_as_default
    }
    options[:install_dir] = @install_dir if @only_install_dir

    request_set.install options do |_, installer|
      @installed_gems << installer.spec if installer
    end

    @installed_gems.sort!

    # Since this is currently only called for docs, we can be lazy and just say
    # it's documentation. Ideally the hook adder could decide whether to be in
    # the background or not, and what to call it.
    in_background "Installing documentation" do
      Gem.done_installing_hooks.each do |hook|
        hook.call self, @installed_gems
      end
    end unless Gem.done_installing_hooks.empty?

    @installed_gems
  end

  def install_development_deps # :nodoc:
    if @development and @dev_shallow then
      :shallow
    elsif @development then
      :all
    else
      :none
    end
  end

  def resolve_dependencies dep_or_name, version # :nodoc:
    request_set = Gem::RequestSet.new
    request_set.development         = @development
    request_set.development_shallow = @dev_shallow
    request_set.soft_missing = @force
    request_set.prerelease = @prerelease
    request_set.remote = false unless consider_remote?

    installer_set = Gem::Resolver::InstallerSet.new @domain
    installer_set.ignore_installed = @only_install_dir

    if consider_local?
      if dep_or_name =~ /\.gem$/ and File.file? dep_or_name then
        src = Gem::Source::SpecificFile.new dep_or_name
        installer_set.add_local dep_or_name, src.spec, src
        version = src.spec.version if version == Gem::Requirement.default
      elsif dep_or_name =~ /\.gem$/ then
        Dir[dep_or_name].each do |name|
          begin
            src = Gem::Source::SpecificFile.new name
            installer_set.add_local dep_or_name, src.spec, src
          rescue Gem::Package::FormatError
          end
        end
      # else This is a dependency. InstallerSet handles this case
      end
    end

    dependency =
      if spec = installer_set.local?(dep_or_name) then
        Gem::Dependency.new spec.name, version
      elsif String === dep_or_name then
        Gem::Dependency.new dep_or_name, version
      else
        dep_or_name
      end

    dependency.prerelease = @prerelease

    request_set.import [dependency]

    installer_set.add_always_install dependency

    request_set.always_install = installer_set.always_install

    if @ignore_dependencies then
      installer_set.ignore_dependencies = true
      request_set.ignore_dependencies   = true
      request_set.soft_missing          = true
    end

    request_set.resolve installer_set

    @errors.concat request_set.errors

    request_set
  end

end