add connection string commands

src/db-up/azext_db_up/_help.py

@@ -45,3 +45,13 @@
         - name: Delete the resource group and the full cache.
           text: az postgres down --delete-group
 """
+
+helps['mysql show-connection-string'] = """
+    type: command
+    short-summary: Show the connection strings for a MySQL server database.
+"""
+
+helps['postgres show-connection-string'] = """
+    type: command
+    short-summary: Show the connection strings for a PostgreSQL server database.
+"""

src/db-up/azext_db_up/_params.py

@@ -34,6 +34,12 @@ def load_arguments(self, _):  # pylint: disable=too-many-locals, too-many-statem
                        help='The name of a database to initialize.')
             c.argument('tags', tags_type)
 
+        with self.argument_context('{} show-connection-string'.format(scope)) as c:
+            c.argument('database', help='The database to connect to.')
+            c.argument('host', help='The host name or IP address of the MySQL server.')
+            c.argument('password', help='The login password of the user.')
+            c.argument('user', help='The login username.')
+
         with self.argument_context('{} down'.format(scope)) as c:
             c.ignore('server_name')
             c.ignore('resource_group_name')

src/db-up/azext_db_up/commands.py

@@ -26,9 +26,11 @@ def load_command_table(self, _):  # pylint: disable=too-many-locals, too-many-st
                          table_transformer=table_transform_connection_string)
         g.custom_command('down', 'server_down', validator=db_down_namespace_processor('mysql'), supports_no_wait=True,
                          confirmation=True)
+        g.custom_command('show-connection-string', 'create_mysql_connection_string')
 
     with self.command_group('postgres', postgres_servers_sdk, client_factory=cf_postgres_servers) as g:
         g.custom_command('up', 'postgres_up', validator=db_up_namespace_processor('postgres'),
                          table_transformer=table_transform_connection_string)
         g.custom_command('down', 'server_down', validator=db_down_namespace_processor('postgres'),
                          supports_no_wait=True, confirmation=True)
+        g.custom_command('show-connection-string', 'create_postgresql_connection_string')

src/db-up/azext_db_up/custom.py

@@ -70,7 +70,7 @@ def mysql_up(cmd, client, resource_group_name=None, server_name=None, location=N
         _run_mysql_commands(host, user, administrator_login_password, database_name)
 
     return {
-        'connectionStrings': _create_mysql_connection_string(
+        'connectionStrings': create_mysql_connection_string(
             host, user, administrator_login_password, database_name),
         'host': host,
         'username': user,
@@ -128,7 +128,7 @@ def postgres_up(cmd, client, resource_group_name=None, server_name=None, locatio
         _run_postgresql_commands(host, user, administrator_login_password, database_name)
 
     return {
-        'connectionStrings': _create_postgresql_connection_string(
+        'connectionStrings': create_postgresql_connection_string(
             host, user, administrator_login_password, database_name),
         'host': host,
         'username': user,
@@ -149,7 +149,7 @@ def server_down(cmd, client, resource_group_name=None, server_name=None, delete_
     return client.delete(resource_group_name, server_name)
 
 
-def _create_mysql_connection_string(host, user, password, database):
+def create_mysql_connection_string(host, user, password, database):
     result = {
         'mysql_cmd': "mysql {database} --host {host} --user {user} --password={password}",
         'ado.net': "Server={host}; Port=3306; Database={database}; Uid={user}; Pwd={password};",
@@ -179,7 +179,7 @@ def _create_mysql_connection_string(host, user, password, database):
     return result
 
 
-def _create_postgresql_connection_string(host, user, password, database):
+def create_postgresql_connection_string(host, user, password, database):
     result = {
         'psql_cmd': "psql --host={host} --port=5432 --username={user} --dbname={database}",
         'ado.net': "Server={host};Database={database};Port=5432;User Id={user};Password={password};",