Move VALID_NAME_CHARS

Moving validation to be in config, as this is where we are doing our
validation against the schema. Going to need this for error handling
when someone specifies an invalid service name.

Signed-off-by: Mazz Mosley <mazz@houseofmnowster.com>

Author: mnowster

compose/config.py

@@ -11,6 +11,8 @@
 from compose.cli.utils import find_candidates_in_parent_dirs
 
 
+VALID_NAME_CHARS = '[a-zA-Z0-9\._\-]'
+
 DOCKER_CONFIG_KEYS = [
     'cap_add',
     'cap_drop',

compose/service.py

@@ -12,7 +12,7 @@
 from docker.utils import create_host_config, LogConfig
 
 from . import __version__
-from .config import DOCKER_CONFIG_KEYS, merge_environment
+from .config import DOCKER_CONFIG_KEYS, merge_environment, VALID_NAME_CHARS
 from .const import (
     DEFAULT_TIMEOUT,
     LABEL_CONTAINER_NUMBER,
@@ -49,8 +49,6 @@
     'security_opt',
 ]
 
-VALID_NAME_CHARS = '[a-zA-Z0-9\._\-]'
-
 
 class BuildError(Exception):
     def __init__(self, service, reason):