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Setup multiple git identities & git user informations

https://gist.github.com/bgauduch/06a8c4ec2fec8fef6354afe94358c89e

/!\ Be very carrefull in your setup : any misconfiguration make all the git config to fail silently ! Go trought this guide step by step and it should be fine 😉

Setup multiple git ssh identities for git

  • Generate your SSH keys as per your git provider documentation.

  • Add each public SSH keys to your git providers acounts.

  • In your ~/.ssh/config, set each ssh key for each repository as in this exemple:

      Host github.com
  	HostName github.com
  	User git
  	IdentityFile ~/.ssh/github_private_key
  	IdentitiesOnly=yes
  Host gitlab.com
  	Hostname gitlab.com
  	User git
  	IdentityFile ~/.ssh/gitlab_private_key
  	IdentitiesOnly=yes

Setup dynamic git user email & name depending on folder

/!\ Require git 2.13+ for conditional include support.

The idea here is to use a different git user name & email depending on the folder you are in.

  • In your ~/.gitconfig, remove the [user] block and add the following (adapt this exemple to your needs) :

      [includeIf "gitdir:~/code/personal/"]
  	path = .gitconfig-personal
  [includeIf "gitdir:~/code/professional/"]
  	path = .gitconfig-professional

  • In your ~/.gitconfig-personal, add your personnal user informations:

      [user]
  	email = [email protected]     # note we use the noreply github mail
  	name = personal_username

  • In your ~/.gitconfig-professional, add your professional user informations:

      [user]
  	email = [email protected]
  	name = professional_username

Test your setup

  • Now each repository will use the custom user info setup depending on the top-level folder.

  • Check your settings are taken into account, for instance in ~/code/personal/ :

    $ cd ~/code/personal/
$ git config --get user.email    	# should return [email protected] as per the exemple
$ git config --get user.name     	# should return personal_username as per the exemple
$ git config --get user.signingkey	# should return the GPG key ID as configured for the user

  • Do the same for each folder you have setup.

  • You can also display and check the global git config: git config --list --global

    • Or just the local config for the repository folder you are in: git config --list

  • Done !

Update & tip

For your information you must now specify the .git folder in the gitdir such as :

[includeIf "gitdir:~/code/personal/repo1/.git"]

Another useful tip, you can use globbing on parent directory to detect new repos without editing your git-config file :

[includeIf "gitdir:~/code/personal/**/.git"]