Add redmine_plugin_migration generator (#31498).

Patch by Kouhei Sutou.


git-svn-id: http://svn.redmine.org/redmine/trunk@18223 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/generators/redmine_plugin_migration/USAGE

@@ -0,0 +1,5 @@
+Description:
+    Generates a plugin migration.
+
+Examples:
+    bin/rails generate redmine_plugin_migration my_plugin add_new_column_to_table

lib/generators/redmine_plugin_migration/redmine_plugin_migration_generator.rb

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+class RedminePluginMigrationGenerator < Rails::Generators::NamedBase
+  include Rails::Generators::Migration
+
+  source_root File.expand_path("../templates", __FILE__)
+  argument :migration, :type => :string
+
+  class << self
+    def next_migration_number(dirname)
+      next_migration_number = current_migration_number(dirname) + 1
+      ActiveRecord::Migration.next_migration_number(next_migration_number)
+    end
+  end
+
+  def create_migration_file
+    plugin_name = file_name.underscore
+    plugin_path = File.join(Redmine::Plugin.directory, plugin_name)
+    migration_template "migration.rb",
+                       "#{plugin_path}/db/migrate/#{@migration}.rb"
+  end
+end

lib/generators/redmine_plugin_migration/templates/migration.rb.tt

@@ -0,0 +1,4 @@
+class <%= @migration_class_name %> < ActiveRecord::Migration[<%= ActiveRecord::Migration.current_version %>]
+  def change
+  end
+end