How to manage different git profiles?

Use git config includes.

Let's say we have a generic profile that stays in ~/.gitconfig. We also have a work profile that we need to use for work related commits (i.e. different email, signing, etc.).

If our general development happens in ~/dev and we put work related repos under ~/dev/work, then we can add overrides into a file ~/.gitconfig-work, for example.

.gitconfig

[user]
    name = Hero
    email = [email protected]
[includeIf "gitdir:~/dev/work"]
    path = ~/.gitconfig-work

.gitconfig-work

[user]
    name = Hero
    email = [email protected]
    signingkey = 123467
[commit]
    gpgsign = true