from git import Repo
import os

class FormulaRepo():

    # class variables
    repo_url = ''
    repo_path = ''
    repo = None

    # class constructor
    def __init__(self, formula):
        self.repo_url = formula.git_url
        self.repo_path = formula.local_path

    # retrieves repo from remote location
    def retrieve(self):
        # check if the destination directory exists
        if not os.path.exists(self.repo_path):
            # clone git repo
            print('Downloading ' + self.repo_url + ' into ' + self.repo_path)
            self.repo = Repo.clone_from(self.repo_url, self.repo_path)
        else:
            # let the user know it's already downloaded so we'll update it later
            print(self.repo_path + ' already exists, so we\'re not downloading it again.')
            self.repo = Repo(self.repo_path)