Improve how runner parses env var file

Author: liamcli

deepspeed/launcher/multinode_runner.py

@@ -4,6 +4,7 @@
 import subprocess
 import warnings
 from abc import ABC, abstractmethod
+from shlex import quote
 
 from ..utils import logger
 from .constants import PDSH_MAX_FAN_OUT, MVAPICH_TMP_HOSTFILE

deepspeed/launcher/runner.py

@@ -378,7 +378,7 @@ def main(args=None):
             if os.path.isfile(environ_file):
                 with open(environ_file, 'r') as fd:
                     for var in fd.readlines():
-                        key, val = var.split('=')
+                        key, val = var.split('=', maxsplit=1)
                         runner.add_export(key, val)
 
         cmd = runner.get_cmd(env, active_resources)