Froze rails gems

[depot.git] / vendor / rails / railties / lib / rails / vendor_gem_source_index.rb

diff --git a/vendor/rails/railties/lib/rails/vendor_gem_source_index.rb b/vendor/rails/railties/lib/rails/vendor_gem_source_index.rb
new file mode 100644 (file)
index 0000000..5b7721f
--- /dev/null
+++ b/vendor/rails/railties/lib/rails/vendor_gem_source_index.rb
@@ -0,0 +1,140 @@
+require 'rubygems'
+require 'yaml'
+
+module Rails
+
+  class VendorGemSourceIndex
+    # VendorGemSourceIndex acts as a proxy for the Gem source index, allowing
+    # gems to be loaded from vendor/gems. Rather than the standard gem repository format,
+    # vendor/gems contains unpacked gems, with YAML specifications in .specification in
+    # each gem directory.
+    include Enumerable
+
+    attr_reader :installed_source_index
+    attr_reader :vendor_source_index
+
+    @@silence_spec_warnings = false
+
+    def self.silence_spec_warnings
+      @@silence_spec_warnings
+    end
+
+    def self.silence_spec_warnings=(v)
+      @@silence_spec_warnings = v
+    end
+
+    def initialize(installed_index, vendor_dir=Rails::GemDependency.unpacked_path)
+      @installed_source_index = installed_index
+      @vendor_dir = vendor_dir
+      refresh!
+    end
+
+    def refresh!
+      # reload the installed gems
+      @installed_source_index.refresh!
+      vendor_gems = {}
+
+      # handle vendor Rails gems - they are identified by having loaded_from set to ""
+      # we add them manually to the list, so that other gems can find them via dependencies
+      Gem.loaded_specs.each do |n, s|
+        next unless s.loaded_from.empty?
+        vendor_gems[s.full_name] = s
+      end
+
+      # load specifications from vendor/gems
+      Dir[File.join(Rails::GemDependency.unpacked_path, '*')].each do |d|
+        dir_name = File.basename(d)
+        dir_version = version_for_dir(dir_name)
+        spec = load_specification(d)
+        if spec
+          if spec.full_name != dir_name
+            # mismatched directory name and gem spec - produced by 2.1.0-era unpack code
+            if dir_version
+              # fix the spec version - this is not optimal (spec.files may be wrong)
+              # but it's better than breaking apps. Complain to remind users to get correct specs.
+              # use ActiveSupport::Deprecation.warn, as the logger is not set yet
+              $stderr.puts("config.gem: Unpacked gem #{dir_name} in vendor/gems has a mismatched specification file."+
+                           " Run 'rake gems:refresh_specs' to fix this.") unless @@silence_spec_warnings
+              spec.version = dir_version
+            else
+              $stderr.puts("config.gem: Unpacked gem #{dir_name} in vendor/gems is not in a versioned directory"+
+                           "(should be #{spec.full_name}).") unless @@silence_spec_warnings
+              # continue, assume everything is OK
+            end
+          end
+        else
+          # no spec - produced by early-2008 unpack code
+          # emulate old behavior, and complain.
+          $stderr.puts("config.gem: Unpacked gem #{dir_name} in vendor/gems has no specification file."+
+                       " Run 'rake gems:refresh_specs' to fix this.") unless @@silence_spec_warnings
+          if dir_version
+            spec = Gem::Specification.new
+            spec.version = dir_version
+            spec.require_paths = ['lib']
+            ext_path = File.join(d, 'ext')
+            spec.require_paths << 'ext' if File.exist?(ext_path)
+            spec.name = /^(.*)-[^-]+$/.match(dir_name)[1]
+            files = ['lib']
+            # set files to everything in lib/
+            files += Dir[File.join(d, 'lib', '*')].map { |v| v.gsub(/^#{d}\//, '') }
+            files += Dir[File.join(d, 'ext', '*')].map { |v| v.gsub(/^#{d}\//, '') } if ext_path
+            spec.files = files
+          else
+            $stderr.puts("config.gem: Unpacked gem #{dir_name} in vendor/gems not in a versioned directory."+
+                         " Giving up.") unless @@silence_spec_warnings
+            next
+          end
+        end
+        spec.loaded_from = File.join(d, '.specification')
+        # finally, swap out full_gem_path
+        # it would be better to use a Gem::Specification subclass, but the YAML loads an explicit class
+        class << spec
+          def full_gem_path
+            path = File.join installation_path, full_name
+            return path if File.directory? path
+            File.join installation_path, original_name
+          end
+        end
+        vendor_gems[File.basename(d)] = spec
+      end
+      @vendor_source_index = Gem::SourceIndex.new(vendor_gems)
+    end
+
+    def version_for_dir(d)
+      matches = /-([^-]+)$/.match(d)
+      Gem::Version.new(matches[1]) if matches
+    end
+
+    def load_specification(gem_dir)
+      spec_file = File.join(gem_dir, '.specification')
+      YAML.load_file(spec_file) if File.exist?(spec_file)
+    end
+
+    def find_name(*args)
+      @installed_source_index.find_name(*args) + @vendor_source_index.find_name(*args)
+    end
+
+    def search(*args)
+      # look for vendor gems, and then installed gems - later elements take priority
+      @installed_source_index.search(*args) + @vendor_source_index.search(*args)
+    end
+
+    def each(&block)
+      @vendor_source_index.each(&block)
+      @installed_source_index.each(&block)
+    end
+
+    def add_spec(spec)
+      @vendor_source_index.add_spec spec
+    end
+
+    def remove_spec(spec)
+      @vendor_source_index.remove_spec spec
+    end
+
+    def size
+      @vendor_source_index.size + @installed_source_index.size
+    end
+
+  end
+end