add(['.']) adds the .git folder

[agirault]

Hoping to add all files in the directory using git add ., including files starting with a period like .gitignore.

Calling the following:

repo.index.add(['.'])

Stages the .git folder and all its history.

[Byron]

repo.index can't be used for cases like this as it's not a complete implementation of 'pathspecs'. It's a much narrower implementation that can be considered 'expert mode'.

By default, I recommend using repo.git.add('.') instead to have the work done by git instead.