launch_run: builds rundir and launches run

e.g., python launch_run.py -o -d ~/foo bar
where foo is the target location for the run directory
and bar is the input file with run details like
start and end date. Currently bar is not used as the format
is TBD after consultation with CCMC as it will use whatever
is returned by the RoR web interface.

launch_run.py

@@ -26,7 +26,7 @@ def setup_parser():
     # Create argument parser & set up arguments:
     parser = ArgumentParser(description=__doc__,
                             formatter_class=RawDescriptionHelpFormatter)
-    parser.add_argument("-d", "--destdir", default=None,
+    parser.add_argument("-d", "--destdir", default=None, required=True,
                         help="Destination path for run directory")
     parser.add_argument("configfile", nargs='+', help="Run config")
     parser.add_argument("-o", "--overwrite", action="store_true",
@@ -57,6 +57,8 @@ def parse_config(config_file):
     end_date = dt.datetime(2015, 3, 18)  # get from config file
     lastramind = get_ramindices_end()
     if end_date >= lastramind:
+        # if run ends after the last date in the Ramindices file,
+        # update it
         with cd("Scripts"):
             subprocess.run(['python', 'updateRamIndices.py'])
 
@@ -68,10 +70,27 @@ def setup_rundir(args):
     parse_config(args.configfile)
     # Now copy in everything we need
     # and move rundir to final location
-    compl = subprocess.run(['make', 'rundir'], check=True, capture_output=True)
-    shutil.move('rundir', args.destdir)
+    compl = subprocess.run(['make', 'rundir', 'RUNDIR=run_ram_ror'],
+                           check=True, capture_output=True)
+    if args.overwrite:
+        shutil.rmtree(args.destdir)
+    shutil.move('run_ram_ror', args.destdir)
+
+
+def run_model(args):
+    '''Launch RAM-SCB as a detached process so it keeps running
+       and the launch script exits
+    '''
+    with cd(args.destdir):
+        print(os.getcwd())
+        if not os.path.isfile('ram_scb.exe'):
+            raise RuntimeError(' '.join(['RAM-SCB not found in specified',
+                                         'directory, or directory not',
+                                         'created properly']))
+        subprocess.Popen(['./ram_scb.exe'], close_fds=True)
 
 
 if __name__ == '__main__':
     args = setup_parser()
     setup_rundir(args)
+    run_model(args)