run_adf_diag

#!/usr/bin/env python3

"""
script: run_adf_diag

goal:  To allow a user to easily run the CAM diagnostics package from
       the command line.

Inputs:  The ADF diagnostics config file (in YAML format).  If the file is
         located in a different directory then the system path must also be
         included.

Any problems or issues with this script should be posted on the
ADF Github Discussions page located online here:

https://github.com/NCAR/ADF/discussions

Please note that registration may be required before a message can
be posted.  However, feel free to search the forums for similar issues
(and possible solutions) without needing to register or sign in.

Good luck, and may all your plots be helpful!
"""

#++++++++++++++++++++++++++++++
#Import standard python modules
#++++++++++++++++++++++++++++++

import os.path
import sys
import argparse

#+++++++++++++++++++++++++++++
#Import ADF diagnostics module
#+++++++++++++++++++++++++++++

#Determine local directory path:
_LOCAL_PATH = os.path.dirname(os.path.abspath(__file__))

#Add lib directory to path:
_DIAG_LIB_PATH = os.path.join(_LOCAL_PATH,"lib")

#Check that path actually exists:
if os.path.isdir(_DIAG_LIB_PATH):
    #If true, then add to Python path:
    sys.path.append(_DIAG_LIB_PATH)
else:
    #If not, then raise error:
    raise FileNotFoundError("'./lib' directory not found. Has 'run_adf_diag' been moved?")

#Import ADF diagnostics object:
from adf_diag import AdfDiag

#Import ADF diagnostics error classt:
from adf_base import AdfError

#################
#Helper functions
#################

#++++++++++++++++++++++++++++++
#Input argument parser function
#++++++++++++++++++++++++++++++

def parse_arguments():

    """
    Parses command-line input arguments using the argparse
    python module and outputs the final argument object.
    """

    #Create parser object:
    parser = argparse.ArgumentParser(description='Command-line wrapper to run the ADF diagnostics package.')

    #Add input arguments to be parsed:
    #--------------------------------

    #Config file:
    parser.add_argument('configure_file', nargs='?', action='store', type=str,
                        help="YAML file used to configure CAM diagnostics.")

    #Flag method to point to config file.  Will be removed at some point in the future.
    parser.add_argument('--config-file', '--config_file', metavar='<DIAG_YAML_FILE>', action='store', type=str,
                        help="YAML file used to configure CAM diagnostics (deprecated).")

    #Debug setting:
    parser.add_argument('--debug', action='store_true', help="Turn on debug output.")

    #--------------------------------

    #Parse Argument inputs
    args = parser.parse_args()

    #If no config file argument is present, then throw an error:
    if (not args.configure_file) and (not args.config_file):
        emsg = "No Config file found, please run 'run_diag <DIAG_YAML_FILE>'.\n"
        emsg +="Where <DIAG_YAML_FILE> is the name of the yaml file used to configure"
        emsg +="the diagnostics package."
        parser.error(emsg)

    return args

############################
#Main CAM diagnostics script
############################

#Run code below if command is called
#directly from the command line:
if __name__ == "__main__":

    #+++++++++++++++++++++
    #Begin ADF diag script
    #+++++++++++++++++++++
    print('ADF diagnostics is starting...')

    #+++++++++++++++++++++++++++++++++++++++++++
    #Check that python is version 3.6 or greater
    #+++++++++++++++++++++++++++++++++++++++++++

    if sys.version_info[0] < 3:
        raise AdfError("Script only works with Python 3. Please switch python versions.")

    if sys.version_info[1] < 6:
        raise AdfError("Script only works with Python version 3.6 or greater.  Please update python.")

    #++++++++++++++++++++++++++++
    #Parse command-line arguments
    #++++++++++++++++++++++++++++

    args = parse_arguments()

    #Extract YAML config file name/path:
    if args.configure_file:
      config_yaml = args.configure_file
    else:
      config_yaml = args.config_file

    #Extract debug flag:
    config_debug = args.debug

    #+++++++++++++++++++++++++++++++++
    #Call main ADF diagnostics methods
    #+++++++++++++++++++++++++++++++++

    #Initalize CAM diagnostics object:
    diag = AdfDiag(config_yaml, debug=config_debug)

    #Create model time series.
    #Please note that this is an internal ADF function:
    diag.create_time_series()

    #Create model baseline time series (if needed):
    if not diag.compare_obs:
        diag.create_time_series(baseline=True)

    #Call the CVDP:
    if diag.get_cvdp_info('cvdp_run'):
       diag.setup_run_cvdp()

    #Create model climatology (climo) files.
    #This call uses the "time_averaging_scripts" specified
    #in the config file:
    diag.create_climo()

    #If a user is doing a model vs obs comparison, but
    #no observations were found, then stop here:
    if diag.compare_obs and not diag.var_obs_dict:
        print('\nADF diagnostics has completed successfully.')
        sys.exit(0)

    #Regrid model climatology files to match either
    #observations or CAM baseline climatologies.
    #This call uses the "regridding_scripts" specified
    #in the config file:
    diag.regrid_climo()

    #Perform analyses on the simulation(s).
    #This call uses the "analysis_scripts" specified in the
    #config file:
    diag.perform_analyses()

    #Create plots.
    #This call uses the "plotting_scripts" specified
    #in the config file:
    diag.create_plots()

    #Create website.
    #Please note that this is an internal ADF function:
    if diag.create_html:
        diag.create_website()

    #+++++++++++++++
    #End diag script
    #+++++++++++++++
    print('\nADF diagnostics has completed successfully.')
    sys.exit(0)