Heroku Procfile not going into directories?

This is my file structure:

requirements.txt
Procfile
Chess/
      -- lichess-bot/
                     -- lichess-bot.py
                     -- config.yml
                     -- (many other files related to lichess-bot.py)

The part responsible to open the YAML in config.py:

def load_config(config_file):
    with open(config_file) as stream:
        try:
            CONFIG = yaml.load(stream)
        except Exception as e:
            print("There appears to be a syntax problem with your config.yml")
            raise e

And in lichess-bot.py here is the call for the config.yml:

CONFIG = load_config(args.config or "./config.yml")

The commands I need to execute are

chmod +x ./engines/stockfish_10_x64
python lichess-bot.py -u

I tried this in Heroku bash: python ./chess/lichess-bot/lichess-bot.py -u but it returns

FileNotFoundError: [Errno 2] No such file or directory: './config.yml'

I tried this Procfile:

worker: cd chess
worker: cd lichess-bot
worker: chmod +x ./engines/stockfish_10_x64
worker: python lichess-bot.py -u

but Heroku couldn't recognize it.

If I do this manually:

~ $ cd chess
~/chess cd lichess-bot
~/chess/lichess-bot python lichess-bot.py -u

it work perfectly

How to access directories from Procfile and then execute the file without errors?

Solution

The code defaults to a configuration file in the current directory named config.yml:

CONFIG = load_config(args.config or "./config.yml")

You can move your config.yml to the root of your repository, or you can provide args.config. It looks like that can be done with --config.

Your Procfile should just define process types. They're not scripts, and they shouldn't contain many "steps". Something like

worker: python lichess-bot.py --config chess/lichess-bot/config.yml -u

should work (assuming your directory is actually called chess/ and not Chess/). If you need to make the engine executable, consider doing that locally and committing it as an executable file.