Add a dry_run option to toast_run

Author: tskisner

src/toast/scripts/toast_run.py

@@ -23,6 +23,7 @@
 import argparse
 import datetime
 import os
+import pprint
 
 import toast
 import toast.config
@@ -80,6 +81,13 @@ def main(opts=None):
         default="main",
         help="The operator to run as the 'main'",
     )
+    parser.add_argument(
+        "--dry_run",
+        required=False,
+        default=False,
+        action="store_true",
+        help="If True, log the job config and exit",
+    )
 
     # The operators and templates we want to configure from the command line
     # or a parameter file.
@@ -112,6 +120,11 @@ def main(opts=None):
             group_size = 1
         else:
             group_size = comm.size
+
+    if otherargs.dry_run:
+        pprint.pprint(job)
+        return
+
     toast_comm = toast.Comm(world=comm, groupsize=group_size)
     data = toast.Data(comm=toast_comm)
 
@@ -129,6 +142,7 @@ def main(opts=None):
     log.info_rank(f"End of the workflow:  {mem}", comm=comm)
     log.info_rank("Workflow completed in", comm=comm, timer=timer)
 
+    # Cleanup
     data.clear()
     del data
     toast_comm.close()