Python script to rename hugo chapters as standalone content pages and remove auto-generated content

fix_hugo_chapters.py

import os

lines_to_remove = {
    'pre = "<b>X. </b>"\n',
    'chapter = true\n',
    '### Chapter X\n',
    '# Some Chapter title\n',
    'Lorem Ipsum.',
}

# find all sub-directories
directories = next(os.walk('.'))[1]

for directory in directories:
    # the subdirectory contains a chapter_name/_index.md file
    chapter_index = f"{directory}/_index.md"
    if os.path.exists(chapter_index):

        # rename it to chapter_name.md instead
        page_name = f"{directory}.md"
        os.rename(chapter_index, page_name)
        print(f"renamed chapter to: {page_name}")

        # remove the unneeded auto-generated chapter content
        with open(page_name,"r+") as f:
            new_f = f.readlines()
            f.seek(0)
            for line in new_f:
                if line not in lines_to_remove:
                    f.write(line)
            f.truncate()

# clean up the now empty directories
for directory in directories:
    if os.listdir(directory):
        print("Something went wrong. directory is not empty!")
        os.sys.exit(1)

    os.rmdir(directory)

print("Done!")