Snippet

Personal and work git on one machine

Some needed hygiene for working in a professional environment without the overhead

Add both emails to a single GitHub account and verify them (Settings → Emails) — GitHub attributes a commit to your profile by matching the author email. Then let git pick the identity by folder: anything under ~/work/ is professional, everything else is personal. Clone by intent and you never touch user.email again.

~/.gitconfig

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[include]
  path = ~/.gitconfig-perso

[includeIf "gitdir:~/work/"]
  path = ~/.gitconfig-pro

~/.gitconfig-perso

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[user]
  name = Your Name
  email = you@personal-email.com
  signingkey = BA07F563XXXXXXXX

~/.gitconfig-pro

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[user]
  name = Your Name
  email = you@company.com
  signingkey = 522A0BC5XXXXXXXX

The trailing slash on gitdir:~/work/ matches the folder and everything under it; the override must come after the default include to win. Check it:

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$ cd ~/perso/blog && git config user.email
you@personal-email.com

$ cd ~/work/acme-api && git config user.email
you@company.com