Use absolute path in metadata and add hostname

lib/__init__.py

@@ -5,8 +5,9 @@ import configparser
 import itertools
 import os
 import re
-import sys
+import socket
 import subprocess
+import sys
 from datetime import datetime
 from os import path
 from typing import Any, Dict,List
@@ -167,13 +168,15 @@ def setup_meta_attrs(ds: xr.Dataset,
     """Set some dataset attributes with information on how it was created.
 
     Attributes are:
-    - "created_with": filename of the python script used (ie `argv[0]`).
+    - "created_with": hostname and filename of the python script used
     - "created_with_args": a string representing the `args` dictionnary,
     - "created_on": date of creation
     - "created_on_commit": if found, the current/HEAD commit hash.
       completed by `kwargs`.
     """
-    ds.attrs["created_with"] = sys.argv[0]
+    hostname = socket.gethostname()
+    script = path.normpath(path.abspath(sys.argv[0]))
+    ds.attrs["created_with"] = "{}:{}".format(hostname, script)
 
     if args is None:
         args = {}