Refactor script/dbconsole into an object

railties/lib/rails/commands/dbconsole.rb

@@ -2,86 +2,95 @@ require 'erb'
 require 'yaml'
 require 'optparse'
 
-include_password = false
-options = {}
+module Rails
+  class DBConsole
+    def self.start
+      new.start
+    end
 
-OptionParser.new do |opt|
-  opt.banner = "Usage: dbconsole [options] [environment]"
-  opt.on("-p", "--include-password", "Automatically provide the password from database.yml") do |v|
-    include_password = true
-  end
+    def start
+      include_password = false
+      options = {}
+      OptionParser.new do |opt|
+        opt.banner = "Usage: dbconsole [options] [environment]"
+        opt.on("-p", "--include-password", "Automatically provide the password from database.yml") do |v|
+          include_password = true
+        end
 
-  opt.on("--mode [MODE]", ['html', 'list', 'line', 'column'],
-    "Automatically put the sqlite3 database in the specified mode (html, list, line, column).") do |mode|
-      options['mode'] = mode
-  end
+        opt.on("--mode [MODE]", ['html', 'list', 'line', 'column'],
+          "Automatically put the sqlite3 database in the specified mode (html, list, line, column).") do |mode|
+            options['mode'] = mode
+        end
 
-  opt.on("-h", "--header") do |h|
-    options['header'] = h
-  end
+        opt.on("-h", "--header") do |h|
+          options['header'] = h
+        end
 
-  opt.parse!(ARGV)
-  abort opt.to_s unless (0..1).include?(ARGV.size)
-end
+        opt.parse!(ARGV)
+        abort opt.to_s unless (0..1).include?(ARGV.size)
+      end
 
-env = ARGV.first || ENV['RAILS_ENV'] || 'development'
-unless config = YAML::load(ERB.new(IO.read(Rails.root + "/config/database.yml")).result)[env]
-  abort "No database is configured for the environment '#{env}'"
-end
+      env = ARGV.first || ENV['RAILS_ENV'] || 'development'
+      unless config = YAML::load(ERB.new(IO.read("#{Rails.root}/config/database.yml")).result)[env]
+        abort "No database is configured for the environment '#{env}'"
+      end
 
 
-def find_cmd(*commands)
-  dirs_on_path = ENV['PATH'].to_s.split(File::PATH_SEPARATOR)
-  commands += commands.map{|cmd| "#{cmd}.exe"} if RUBY_PLATFORM =~ /win32/
+      def find_cmd(*commands)
+        dirs_on_path = ENV['PATH'].to_s.split(File::PATH_SEPARATOR)
+        commands += commands.map{|cmd| "#{cmd}.exe"} if RUBY_PLATFORM =~ /win32/
 
-  full_path_command = nil
-  found = commands.detect do |cmd|
-    dir = dirs_on_path.detect do |path|
-      full_path_command = File.join(path, cmd)
-      File.executable? full_path_command
+        full_path_command = nil
+        found = commands.detect do |cmd|
+          dir = dirs_on_path.detect do |path|
+            full_path_command = File.join(path, cmd)
+            File.executable? full_path_command
+          end
+        end
+        found ? full_path_command : abort("Couldn't find database client: #{commands.join(', ')}. Check your $PATH and try again.")
+      end
+
+      case config["adapter"]
+      when "mysql"
+        args = {
+          'host'      => '--host',
+          'port'      => '--port',
+          'socket'    => '--socket',
+          'username'  => '--user',
+          'encoding'  => '--default-character-set'
+        }.map { |opt, arg| "#{arg}=#{config[opt]}" if config[opt] }.compact
+
+        if config['password'] && include_password
+          args << "--password=#{config['password']}"
+        elsif config['password'] && !config['password'].to_s.empty?
+          args << "-p"
+        end
+
+        args << config['database']
+
+        exec(find_cmd('mysql', 'mysql5'), *args)
+
+      when "postgresql"
+        ENV['PGUSER']     = config["username"] if config["username"]
+        ENV['PGHOST']     = config["host"] if config["host"]
+        ENV['PGPORT']     = config["port"].to_s if config["port"]
+        ENV['PGPASSWORD'] = config["password"].to_s if config["password"] && include_password
+        exec(find_cmd('psql'), config["database"])
+
+      when "sqlite"
+        exec(find_cmd('sqlite'), config["database"])
+
+      when "sqlite3"
+        args = []
+
+        args << "-#{options['mode']}" if options['mode']
+        args << "-header" if options['header']
+        args << config['database']
+
+        exec(find_cmd('sqlite3'), *args)
+      else
+        abort "Unknown command-line client for #{config['database']}. Submit a Rails patch to add support!"
+      end
     end
   end
-  found ? full_path_command : abort("Couldn't find database client: #{commands.join(', ')}. Check your $PATH and try again.")
-end
-
-case config["adapter"]
-when "mysql"
-  args = {
-    'host'      => '--host',
-    'port'      => '--port',
-    'socket'    => '--socket',
-    'username'  => '--user',
-    'encoding'  => '--default-character-set'
-  }.map { |opt, arg| "#{arg}=#{config[opt]}" if config[opt] }.compact
-
-  if config['password'] && include_password
-    args << "--password=#{config['password']}"
-  elsif config['password'] && !config['password'].to_s.empty?
-    args << "-p"
-  end
-
-  args << config['database']
-
-  exec(find_cmd('mysql', 'mysql5'), *args)
-
-when "postgresql"
-  ENV['PGUSER']     = config["username"] if config["username"]
-  ENV['PGHOST']     = config["host"] if config["host"]
-  ENV['PGPORT']     = config["port"].to_s if config["port"]
-  ENV['PGPASSWORD'] = config["password"].to_s if config["password"] && include_password
-  exec(find_cmd('psql'), config["database"])
-
-when "sqlite"
-  exec(find_cmd('sqlite'), config["database"])
-
-when "sqlite3"
-  args = []
-
-  args << "-#{options['mode']}" if options['mode']
-  args << "-header" if options['header']
-  args << config['database']
-
-  exec(find_cmd('sqlite3'), *args)
-else
-  abort "Unknown command-line client for #{config['database']}. Submit a Rails patch to add support!"
-end
+end

railties/lib/rails/generators/rails/app/templates/script/dbconsole

@@ -1,2 +1,3 @@
 require File.expand_path('../../config/application',  __FILE__)
 require 'rails/commands/dbconsole'
+Rails::DBConsole.start