Class: Gem::DependencyInstaller

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

# File 'lib/rubygems/dependency_installer.rb', line 84

def find_gems_with_sources(dep)
  # Reset the errors
  @errors = nil
  gems_and_sources = []

  if @domain == :both or @domain == :local then
    Dir[File.join(Dir.pwd, "#{dep.name}-[0-9]*.gem")].each do |gem_file|
      spec = Gem::Format.from_file_by_path(gem_file).spec
      gems_and_sources << [spec, gem_file] if spec.name == dep.name
    end
  end

  if @domain == :both or @domain == :remote then
    begin
      requirements = dep.requirement.requirements.map do |req, ver|
        req
      end

      all = !dep.prerelease? &&
            # we only need latest if there's one requirement and it is
            # guaranteed to match the newest specs
            (requirements.length > 1 or
              (requirements.first != ">=" and requirements.first != ">"))

      found, @errors = Gem::SpecFetcher.fetcher.fetch_with_errors dep, all, true, dep.prerelease?

      gems_and_sources.push(*found)

    rescue Gem::RemoteFetcher::FetchError => e
      if Gem.configuration.really_verbose then
        say "Error fetching remote data:\t\t#{e.message}"
        say "Falling back to local-only install"
      end
      @domain = :local
    end
  end

  gems_and_sources.sort_by do |gem, source|
    [gem, source =~ /^http:\/\// ? 0 : 1] # local gems win
  end
end

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

# File 'lib/rubygems/dependency_installer.rb', line 184

def find_spec_by_name_and_version(gem_name,
                                  version = Gem::Requirement.default,
                                  prerelease = false)
  spec_and_source = nil

  glob = if File::ALT_SEPARATOR then
           gem_name.gsub File::ALT_SEPARATOR, File::SEPARATOR
         else
           gem_name
         end

  local_gems = Dir["#{glob}*"].sort.reverse

  unless local_gems.empty? then
    local_gems.each do |gem_file|
      next unless gem_file =~ /gem$/
      begin
        spec = Gem::Format.from_file_by_path(gem_file).spec
        spec_and_source = [spec, gem_file]
        break
      rescue SystemCallError, Gem::Package::FormatError
      end
    end
  end

  if spec_and_source.nil? then
    dep = Gem::Dependency.new gem_name, version
    dep.prerelease = true if prerelease
    spec_and_sources = find_gems_with_sources(dep).reverse

    spec_and_source = spec_and_sources.find { |spec, source|
      Gem::Platform.match spec.platform
    }
  end

  if spec_and_source.nil? then
    raise Gem::GemNotFoundException.new(
      "Could not find a valid gem '#{gem_name}' (#{version}) locally or in a repository",
      gem_name, version, @errors)
  end

  @specs_and_sources = [spec_and_source]
end

130
131
132
133
134
135
136
137
138
139
140

# File 'lib/rubygems/dependency_installer.rb', line 130

def gather_dependencies
  specs = @specs_and_sources.map { |spec,_| spec }

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

  add_found_dependencies to_do, dependency_list unless @ignore_dependencies

  @gems_to_install = dependency_list.dependency_order.reverse
end

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

# File 'lib/rubygems/dependency_installer.rb', line 242

def install dep_or_name, version = Gem::Requirement.default
  if String === dep_or_name then
    find_spec_by_name_and_version dep_or_name, version, @prerelease
  else
    dep_or_name.prerelease = @prerelease
    @specs_and_sources = [find_gems_with_sources(dep_or_name).last]
  end

  @installed_gems = []

  gather_dependencies

  @gems_to_install.each do |spec|
    last = spec == @gems_to_install.last
    # HACK is this test for full_name acceptable?
    next if @source_index.any? { |n,_| n == spec.full_name } and not last

    # TODO: make this sorta_verbose so other users can benefit from it
    say "Installing gem #{spec.full_name}" if Gem.configuration.really_verbose

    _, source_uri = @specs_and_sources.assoc spec
    begin
      local_gem_path = Gem::RemoteFetcher.fetcher.download spec, source_uri,
                                                           @cache_dir
    rescue Gem::RemoteFetcher::FetchError
      next if @force
      raise
    end

    inst = Gem::Installer.new local_gem_path,
                              :bin_dir             => @bin_dir,
                              :development         => @development,
                              :env_shebang         => @env_shebang,
                              :force               => @force,
                              :format_executable   => @format_executable,
                              :ignore_dependencies => @ignore_dependencies,
                              :install_dir         => @install_dir,
                              :security_policy     => @security_policy,
                              :source_index        => @source_index,
                              :user_install        => @user_install,
                              :wrappers            => @wrappers

    spec = inst.install

    @installed_gems << spec
  end

  @installed_gems
end