add CREATED and REVISION in all build args, and fix --build-arg to work

docker_build.py

@@ -6,7 +6,8 @@
 """
 # Version 2.19
 import argparse
+import datetime
 import json
 import logging
 import os
 import signal
@@ -9,8 +10,8 @@
 import json
 import logging
 import os
 import signal
-from subprocess import call
+from subprocess import call, check_output
 import sys
 
 from six.moves import configparser
@@ -24,7 +25,7 @@
 
 _logger = logging.getLogger(__name__)
 
-__version__ = '0.1.2'
+__version__ = '0.1.3'
 __date__ = '2018-04-04'
 __updated__ = '2018-11-19'
 
@@ -89,5 +90,6 @@
     )
     parser.add_argument(
         '--build-arg',
-        help="add dev feature to generated image [default: %(default)s]",
+        help="build arg for the image, formated like FOO=BAR "
+             "[default: %(default)s]",
         default=None,
@@ -93,4 +95,5 @@
         default=None,
+        nargs='*',
     )
     parser.add_argument(
         '--no-pull',
@@ -94,7 +97,8 @@
     )
     parser.add_argument(
         '--no-pull',
-        help="indicate to docker to not pull the base image [default: %(default)s]",
+        help="indicate to docker to not pull the base image "
+             "[default: %(default)s]",
         action='store_true',
     )
     # TODO (maybe) add argument for other build arg
@@ -153,7 +157,14 @@
     signal.signal(signal.SIGTERM, signal_handler)
 
     # TODO docker build
-    buildargs = nmspc.build_arg
+    buildargs = dict()
+    buildargs['REVISION'] = check_output('hg identify -i'.split()).split()[0]
+    buildargs['CREATED'] = datetime.datetime.now().isoformat()
+    if nmspc.build_arg:
+        for arg in nmspc.build_arg:
+            a = arg.split('=')
+            buildargs[a[0]] = a[1]
+    logging.debug("Build args: %s", buildargs)
     dockerfile = 'Dockerfile'
     if dev:
         debug_dockerfile = 'Dockerfile.debug'