Rename rake railties:copy_migrations to rake railties:install:migrations and fix it to work with new copying strategy

activerecord/lib/active_record/railties/databases.rake

@@ -5,27 +5,6 @@ namespace :db do
     ActiveRecord::Migrator.migrations_path = Rails.application.paths["db/migrate"].first
   end
 
-  task :copy_migrations => :load_config do
-    to_load = ENV["FROM"].blank? ? :all : ENV["FROM"].split(",").map {|n| n.strip }
-    railties = {}
-    Rails.application.railties.all do |railtie|
-      next unless to_load == :all || to_load.include?(railtie.railtie_name)
-
-      if railtie.respond_to?(:paths) && (path = railtie.paths["db/migrate"].first)
-        railties[railtie.railtie_name] = path
-      end
-    end
-
-    copied = ActiveRecord::Migration.copy(ActiveRecord::Migrator.migrations_path, railties)
-
-    if copied.blank?
-      puts "No migrations were copied, project is up to date."
-    else
-      puts "The following migrations were copied:"
-      puts copied.map{ |path| File.basename(path) }.join("\n")
-    end
-  end
-
   namespace :create do
     # desc 'Create all the local databases defined in config/database.yml'
     task :all => :load_config do
@@ -501,8 +480,31 @@ namespace :db do
 end
 
 namespace :railties do
-  desc "Copies missing migrations from Railties (e.g. plugins, engines). You can specify Railties to use with FROM=railtie1,railtie2"
-  task :copy_migrations => 'db:copy_migrations'
+  namespace :install do
+    desc "Copies missing migrations from Railties (e.g. plugins, engines). You can specify Railties to use with FROM=railtie1,railtie2"
+    task :migrations => :"db:load_config" do
+      to_load = ENV["FROM"].blank? ? :all : ENV["FROM"].split(",").map {|n| n.strip }
+      railties = {}
+      Rails.application.railties.all do |railtie|
+        next unless to_load == :all || to_load.include?(railtie.railtie_name)
+
+        if railtie.respond_to?(:paths) && (path = railtie.paths["db/migrate"].first)
+          railties[railtie.railtie_name] = path
+        end
+      end
+
+      on_skip = Proc.new do |name, migration|
+        $stderr.puts "WARNING: Migration #{migration.basename} from #{name} has been skipped. Migration with the same name already exists."
+      end
+
+      on_copy = Proc.new do |name, migration, old_path|
+        puts "Copied migration #{migration.basename} from #{name}"
+      end
+
+      ActiveRecord::Migration.copy( ActiveRecord::Migrator.migrations_path, railties,
+                                    :on_skip => on_skip, :on_copy => on_copy)
+    end
+  end
 end
 
 task 'test:prepare' => 'db:test:prepare'

railties/test/railties/shared_tests.rb

@@ -21,6 +21,11 @@ module RailtiesTest
         end
       RUBY
 
+      @plugin.write "db/migrate/3_create_sessions.rb", <<-RUBY
+        class CreateSessions < ActiveRecord::Migration
+        end
+      RUBY
+
       app_file "db/migrate/1_create_sessions.rb", <<-RUBY
         class CreateSessions < ActiveRecord::Migration
         end
@@ -38,24 +43,26 @@ module RailtiesTest
       add_to_config "ActiveRecord::Base.timestamped_migrations = false"
 
       Dir.chdir(app_path) do
-        output = `rake railties:copy_migrations FROM=bukkits`
+        output = `rake railties:install:migrations FROM=bukkits 2>&1`
 
-        assert File.exists?("#{app_path}/db/migrate/2_create_users.bukkits.rb")
-        assert File.exists?("#{app_path}/db/migrate/3_add_last_name_to_users.bukkits.rb")
-        assert_match /2_create_users/, output
-        assert_match /3_add_last_name_to_users/, output
+        assert File.exists?("#{app_path}/db/migrate/2_create_users.rb")
+        assert File.exists?("#{app_path}/db/migrate/3_add_last_name_to_users.rb")
+        assert_match /Copied migration 2_create_users.rb from bukkits/, output
+        assert_match /Copied migration 3_add_last_name_to_users.rb from bukkits/, output
+        assert_match /WARNING: Migration 3_create_sessions.rb from bukkits has been skipped/, output
         assert_equal 3, Dir["#{app_path}/db/migrate/*.rb"].length
 
-        output = `rake railties:copy_migrations`
+        output = `rake railties:install:migrations 2>&1`
 
-        assert File.exists?("#{app_path}/db/migrate/4_create_yaffles.acts_as_yaffle.rb")
-        assert_match /4_create_yaffles/, output
+        assert File.exists?("#{app_path}/db/migrate/4_create_yaffles.rb")
+        assert_match /WARNING: Migration 3_create_sessions.rb from bukkits has been skipped/, output
+        assert_match /Copied migration 4_create_yaffles.rb from acts_as_yaffle/, output
+        assert_no_match /2_create_users/, output
 
         migrations_count = Dir["#{app_path}/db/migrate/*.rb"].length
-        output = `rake railties:copy_migrations`
+        output = `rake railties:install:migrations 2>&1`
 
         assert_equal migrations_count, Dir["#{app_path}/db/migrate/*.rb"].length
-        assert_match /No migrations were copied/, output
       end
     end