git-secret is a bash tool which stores private data inside a git repo.
git-secret encrypts tracked files with public keys for users whom you
trust using gpg, allowing permitted users to access encrypted data
using their secret keys. With git-secret, changes to access rights are
made easy and private-public key issues are handled for you. Passwords
do not need to be changed with git-secret when someone's permission
is revoked - just remove their key from the keychain using git secret
killperson their@email.com, and re-encrypt the files, and they won't
be able to decrypt secrets anymore.