Class: Bundler::Resolver

Inherits:
Object
  • Object
show all
Includes:
GemHelpers, Molinillo::SpecificationProvider, Molinillo::UI
Defined in:
lib/bundler/resolver.rb,
lib/bundler/resolver/spec_group.rb

Defined Under Namespace

Classes: SpecGroup

Constant Summary

Constants included from GemHelpers

GemHelpers::GENERICS, GemHelpers::GENERIC_CACHE

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Molinillo::SpecificationProvider

#allow_missing?

Methods included from Molinillo::UI

#output, #progress_rate

Methods included from GemHelpers

generic, generic_local_platform, local_platform, platform_specificity_match, same_deps, same_specificity, select_best_platform_match

Constructor Details

#initialize(source_requirements, base, gem_version_promoter, additional_base_requirements, platforms) ⇒ Resolver

Returns a new instance of Resolver.



27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/bundler/resolver.rb', line 27

def initialize(source_requirements, base, gem_version_promoter, additional_base_requirements, platforms)
  @source_requirements = source_requirements
  @base = base
  @resolver = Molinillo::Resolver.new(self, self)
  @search_for = {}
  @base_dg = Molinillo::DependencyGraph.new
  @base.each do |ls|
    dep = Dependency.new(ls.name, ls.version)
    @base_dg.add_vertex(ls.name, DepProxy.get_proxy(dep, ls.platform), true)
  end
  additional_base_requirements.each {|d| @base_dg.add_vertex(d.name, d) }
  @platforms = platforms.reject {|p| p != Gem::Platform::RUBY && (platforms - [p]).any? {|pl| generic(pl) == p } }
  @resolving_only_for_ruby = platforms == [Gem::Platform::RUBY]
  @gem_version_promoter = gem_version_promoter
  @use_gvp = Bundler.feature_flag.use_gem_version_promoter_for_major_updates? || !@gem_version_promoter.major?
  @no_aggregate_global_source = @source_requirements[:global].nil?

  @variant_specific_names = []
  @generic_names = ["Ruby\0", "RubyGems\0"]
end

Class Method Details

.platform_sort_key(platform) ⇒ Object 



269
270
271
272
273
 
# File 'lib/bundler/resolver.rb', line 269

def self.platform_sort_key(platform)
  # Prefer specific platform to not specific platform
  return ["99-LAST", "", "", ""] if Gem::Platform::RUBY == platform
  ["00", *platform.to_a.map {|part| part || "" }]
end

.resolve(requirements, source_requirements = {}, base = [], gem_version_promoter = GemVersionPromoter.new, additional_base_requirements = [], platforms = nil) ⇒ Object

Figures out the best possible configuration of gems that satisfies the list of passed dependencies and any child dependencies without causing any gem activation errors.

Parameters

*dependencies<Gem::Dependency>

The list of dependencies to resolve

Returns

<GemBundle>,nil

If the list of dependencies can be resolved, a

collection of gemspecs is returned. Otherwise, nil is returned.



20
21
22
23
24
25
 
# File 'lib/bundler/resolver.rb', line 20

def self.resolve(requirements, source_requirements = {}, base = [], gem_version_promoter = GemVersionPromoter.new, additional_base_requirements = [], platforms = nil)
  base = SpecSet.new(base) unless base.is_a?(SpecSet)
  resolver = new(source_requirements, base, gem_version_promoter, additional_base_requirements, platforms)
  result = resolver.start(requirements)
  SpecSet.new(result)
end

Instance Method Details

#after_resolution ⇒ Object 



98
99
100
 
# File 'lib/bundler/resolver.rb', line 98

def after_resolution
  Bundler.ui.info ""
end

#before_resolution ⇒ Object 



94
95
96
 
# File 'lib/bundler/resolver.rb', line 94

def before_resolution
  Bundler.ui.info "Resolving dependencies...", debug?
end

#debug(depth = 0) ⇒ void

This method returns an undefined value.

Conveys debug information to the user.

Parameters:

  • depth (Integer) (defaults to: 0) —

    the current depth of the resolution process.



77
78
79
80
81
82
 
# File 'lib/bundler/resolver.rb', line 77

def debug(depth = 0)
  return unless debug?
  debug_info = yield
  debug_info = debug_info.inspect unless debug_info.is_a?(String)
  puts debug_info.split("\n").map {|s| depth == 0 ? "BUNDLER: #{s}" : "BUNDLER(#{depth}): #{s}" }
end

#debug? ⇒ Boolean

Returns:

  • (Boolean) 


84
85
86
87
88
89
90
91
92
 
# File 'lib/bundler/resolver.rb', line 84

def debug?
  return @debug_mode if defined?(@debug_mode)
  @debug_mode =
    ENV["BUNDLER_DEBUG_RESOLVER"] ||
    ENV["BUNDLER_DEBUG_RESOLVER_TREE"] ||
    ENV["DEBUG_RESOLVER"] ||
    ENV["DEBUG_RESOLVER_TREE"] ||
    false
end

#dependencies_equal?(dependencies, other_dependencies) ⇒ Boolean

Returns:

  • (Boolean) 


236
237
238
 
# File 'lib/bundler/resolver.rb', line 236

def dependencies_equal?(dependencies, other_dependencies)
  dependencies.map(&:dep) == other_dependencies.map(&:dep)
end

#dependencies_for(specification) ⇒ Object 



108
109
110
111
112
113
114
115
116
117
118
119
120
 
# File 'lib/bundler/resolver.rb', line 108

def dependencies_for(specification)
  all_dependencies = specification.dependencies_for_activated_platforms

  if @variant_specific_names.include?(specification.name)
    @variant_specific_names |= all_dependencies.map(&:name) - @generic_names
  else
    generic_names, variant_specific_names = specification.partitioned_dependency_names_for_activated_platforms
    @variant_specific_names |= variant_specific_names - @generic_names
    @generic_names |= generic_names
  end

  all_dependencies
end

#index_for(dependency, base) ⇒ Object 



196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
 
# File 'lib/bundler/resolver.rb', line 196

def index_for(dependency, base)
  source = @source_requirements[dependency.name]
  if source
    source.specs
  elsif @no_aggregate_global_source
    dependency.all_sources.find(-> { Index.new }) do |s|
      idx = s.specs
      results = idx.search(dependency, base)
      next if results.empty? || results == base
      return idx
    end
  else
    @source_requirements[:global]
  end
end

#indicate_progress ⇒ Object 



102
103
104
 
# File 'lib/bundler/resolver.rb', line 102

def indicate_progress
  Bundler.ui.info ".", false unless debug?
end

#name_for(dependency) ⇒ Object 



216
217
218
 
# File 'lib/bundler/resolver.rb', line 216

def name_for(dependency)
  dependency.name
end

#name_for_explicit_dependency_source ⇒ Object 



220
221
222
223
224
 
# File 'lib/bundler/resolver.rb', line 220

def name_for_explicit_dependency_source
  Bundler.default_gemfile.basename.to_s
rescue StandardError
  "Gemfile"
end

#name_for_locking_dependency_source ⇒ Object 



226
227
228
229
230
 
# File 'lib/bundler/resolver.rb', line 226

def name_for_locking_dependency_source
  Bundler.default_lockfile.basename.to_s
rescue StandardError
  "Gemfile.lock"
end

#relevant_sources_for_vertex(vertex) ⇒ Object 



240
241
242
243
244
245
246
247
248
249
250
 
# File 'lib/bundler/resolver.rb', line 240

def relevant_sources_for_vertex(vertex)
  if vertex.root?
    [@source_requirements[vertex.name]].compact
  elsif @no_aggregate_global_source
    vertex.recursive_predecessors.map do |v|
      @source_requirements[v.name]
    end.compact << @source_requirements[:default]
  else
    []
  end
end

#requirement_satisfied_by?(requirement, activated, spec) ⇒ Boolean

Returns:

  • (Boolean) 


232
233
234
 
# File 'lib/bundler/resolver.rb', line 232

def requirement_satisfied_by?(requirement, activated, spec)
  requirement.matches_spec?(spec) || spec.source.is_a?(Source::Gemspec)
end

#results_for(dependency, base) ⇒ Object 



212
213
214
 
# File 'lib/bundler/resolver.rb', line 212

def results_for(dependency, base)
  index_for(dependency, base).search(dependency, base)
end

#search_for(dependency_proxy) ⇒ Object 



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
 
# File 'lib/bundler/resolver.rb', line 122

def search_for(dependency_proxy)
  platform = dependency_proxy.__platform
  dependency = dependency_proxy.dep
  name = dependency.name
  search_result = @search_for[dependency_proxy] ||= begin
    results = results_for(dependency, @base[name])

    if vertex = @base_dg.vertex_named(name)
      locked_requirement = vertex.payload.requirement
    end

    if !@prerelease_specified[name] && (!@use_gvp || locked_requirement.nil?)
      # Move prereleases to the beginning of the list, so they're considered
      # last during resolution.
      pre, results = results.partition {|spec| spec.version.prerelease? }
      results = pre + results
    end

    spec_groups = if results.any?
      nested = []
      results.each do |spec|
        version, specs = nested.last
        if version == spec.version
          specs << spec
        else
          nested << [spec.version, [spec]]
        end
      end
      nested.reduce([]) do |groups, (version, specs)|
        next groups if locked_requirement && !locked_requirement.satisfied_by?(version)

        specs_by_platform = Hash.new do |current_specs, current_platform|
          current_specs[current_platform] = select_best_platform_match(specs, current_platform)
        end

        spec_group_ruby = SpecGroup.create_for(specs_by_platform, [Gem::Platform::RUBY], Gem::Platform::RUBY)
        groups << spec_group_ruby if spec_group_ruby

        next groups if @resolving_only_for_ruby

        spec_group = SpecGroup.create_for(specs_by_platform, @platforms, platform)
        groups << spec_group if spec_group

        groups
      end
    else
      []
    end
    # GVP handles major itself, but it's still a bit risky to trust it with it
    # until we get it settled with new behavior. For 2.x it can take over all cases.
    if !@use_gvp
      spec_groups
    else
      @gem_version_promoter.sort_versions(dependency, spec_groups)
    end
  end

  unless search_result.empty?
    specific_dependency = @variant_specific_names.include?(name)
    return search_result unless specific_dependency

    search_result.each do |sg|
      if @generic_names.include?(name)
        @variant_specific_names -= [name]
        sg.activate_all_platforms!
      else
        sg.activate_platform!(platform)
      end
    end
  end

  search_result
end

#sort_dependencies(dependencies, activated, conflicts) ⇒ Object 



252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
 
# File 'lib/bundler/resolver.rb', line 252

def sort_dependencies(dependencies, activated, conflicts)
  dependencies.sort_by do |dependency|
    dependency.all_sources = relevant_sources_for_vertex(activated.vertex_named(dependency.name))
    name = name_for(dependency)
    vertex = activated.vertex_named(name)
    [
      @base_dg.vertex_named(name) ? 0 : 1,
      vertex.payload ? 0 : 1,
      vertex.root? ? 0 : 1,
      amount_constrained(dependency),
      conflicts[name] ? 0 : 1,
      vertex.payload ? 0 : search_for(dependency).count,
      self.class.platform_sort_key(dependency.__platform),
    ]
  end
end

#start(requirements) ⇒ Object 



48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
 
# File 'lib/bundler/resolver.rb', line 48

def start(requirements)
  @gem_version_promoter.prerelease_specified = @prerelease_specified = {}
  requirements.each {|dep| @prerelease_specified[dep.name] ||= dep.prerelease? }

  verify_gemfile_dependencies_are_found!(requirements)
  dg = @resolver.resolve(requirements, @base_dg)
  dg.
    tap {|resolved| validate_resolved_specs!(resolved) }.
    map(&:payload).
    reject {|sg| sg.name.end_with?("\0") }.
    map(&:to_specs).
    flatten
rescue Molinillo::VersionConflict => e
  message = version_conflict_message(e)
  raise VersionConflict.new(e.conflicts.keys.uniq, message)
rescue Molinillo::CircularDependencyError => e
  names = e.dependencies.sort_by(&:name).map {|d| "gem '#{d.name}'" }
  raise CyclicDependencyError, "Your bundle requires gems that depend" \
    " on each other, creating an infinite loop. Please remove" \
    " #{names.count > 1 ? "either " : ""}#{names.join(" or ")}" \
    " and try again."
end