Script to take the date fron .md file and put it as a front matter inside the file. Helps when migrating from Jekyll to Hugo.

md-date-changer.py

import os
import fileinput

def main():
    files = [f for f in os.listdir() if f.endswith('.md')]

    for filename in files:
        date = filename[:10]
        print(date, filename)
        with fileinput.FileInput(filename, inplace=1) as f:
            for line in f:
                if 'title:' in line:
                    print("{}\ndate: {}".format(line.strip(), date))
                else:
                    print(line.strip())

    print(" {} files.".format(len(files)))

    
if __name__ == '__main__':
    main()