1 files changed, 55 insertions, 0 deletions
diff --git a/railties/lib/commands/dbconsole.rb b/railties/lib/commands/dbconsole.rb
new file mode 100644
index 0000000000..28c3a3e41f
--- /dev/null
+++ b/railties/lib/commands/dbconsole.rb
@@ -0,0 +1,55 @@
+require 'yaml'
+require 'optparse'
+
+OptionParser.new do |opt|
+  opt.banner = "Usage: dbconsole [environment]"
+  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_file(RAILS_ROOT + "/config/database.yml")[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/
+  commands.detect do |cmd|
+    dirs_on_path.detect do |path|
+      File.executable? File.join(path, cmd)
+    end
+  end || 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',
+    'password'  => '--password',
+    'encoding'  => '--default-character-set'
+  }.map { |opt, arg| "#{arg}=#{config[opt]}" if config[opt] }.compact
+
+  args << config['database']
+
+  exec(find_cmd('mysql5', 'mysql'), *args)
+
+when "postgresql"
+  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"]
+  exec(find_cmd('psql'), '-U', config["username"], config["database"])
+
+when "sqlite"
+  exec(find_cmd('sqlite'), config["database"])
+
+when "sqlite3"
+  exec(find_cmd('sqlite3'), config["database"])
+
+else
+  abort "Unknown command-line client for #{config['database']}. Submit a Rails patch to add support!"
+end