main.py

import os
import sys
import json
import re

def print_files(file_list):
    print("Files are:\n")
    for f in file_list:
        print(f)

def main():
    # Load Variables
    event_type = os.environ.get("GITHUB_EVENT_NAME")
    event_path = os.environ.get("GITHUB_EVENT_PATH")

    # Check to ensure that this is a push event
    if event_type != "push":
        exit(1)

    # Load the push event file
    with open(event_path, 'r') as f:
        github_event_string = f.read()

    github_event_json = json.loads(github_event_string)

    # load up the changes
    changed_files = []
    for commit in github_event_json["commits"]:
        changed_files.extend(commit["added"])
        changed_files.extend(commit["modified"])
        changed_files.extend(commit["removed"])

    print_files(changed_files)
    # find if any of the changes match the pattern.
    does_match = False
    for pattern in sys.argv:
        if does_match:
            break

        for fname in changed_files:
            if re.match(pattern, fname):
                print("Matched On: " + fname + " with pattern: " + pattern)
                does_match = True
                break

    if does_match:
        print("Matches Found... Continuing...")
        exit(0)
    else:
        print("No Matches Found... Skipping Workflow...")
        exit(78)

main()