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Multi-User-Git-Configuration

Work with multible accounts

user.name, user.email and credentails are used based on folder prefix in path

.gitconfig

[user]
    name = standardAccount
    email = standardAccount@example.com

[credential]
    helper = store --file ~/.standardAccount-credentials

[includeIf "gitdir:**/userA*/**"]
    path = ${HOME}/.userA_gitconfig

${HOME}/.userA_gitconfig

[user]
    name = userA_Account
    email = userA@example.com

[credential]
    helper = store --file ~/.userA-credentials

.userA-credentials

GitHub - Personal Access Tokens (PATs)

  1. Go to GitHub Settings https://github.com/settings/apps
  2. Click on "Personal access tokens"
  3. Click on "Tokens (classic)"
  4. Click on "Generate new token"
  5. Copy the token and paste it into .userA-credentials:
https://userA:userAToken@github.com

Git Credential Helper Configuration

Git uses the following configuration structure:

Installation 	git config --system
User 			git config --global
Repository 		git config

The Windows Git installation activates Git Credential Manager (GCM) by default. This may conflict with your custom configurations.

Check your current settings with:

git config --list --show-origin

If needed, disable system-wide credential helper settings:

git config --system --unset credential.helper

Daily Work

Clone a Repository

git clone https://github.com/YourUsername/YourRepository.git userA_YourRepository

Or initialize within ../userA_something/...

Did You Already Use the Wrong User?

ATTENTION: This will change the commit hash and name - you may not want to do this if others have already used this.

Correct the Last Commit

git commit --amend --reset-author

Correct a Specific Commit

git rebase -i <commit-hash>^
# Change 'pick' to 'edit' for the corresponding commit
git commit --amend --reset-author
git rebase --continue

Correct All Commits on a Branch

git filter-branch --env-filter '
if [ "$GIT_COMMITTER_EMAIL" = "old.email@example.com" ]; then
    GIT_COMMITTER_NAME="New Name"
    GIT_COMMITTER_EMAIL="new.email@example.com"
fi
if [ "$GIT_AUTHOR_EMAIL" = "old.email@example.com" ]; then
    GIT_AUTHOR_NAME="New Name"
    GIT_AUTHOR_EMAIL="new.email@example.com"
fi
' -- --all

Push Local to Remote

ATTENTION: This will change the commit hash and name - you may not want to do this if others have already used this.

git push --force

GUI to remove

german: Anmeldeinformationsverwaltung english: Credential Manager

PowerShell & Windows Credentials

.gitconfig

one of your users can use the Windows Credential Manager for the target "git:https://github.com/" but for me this never worked IRL

[credential]
    helper = wincred

Install Credential Manager

Sometimes on a Windows PC, there are already credentials for Git, and they may be problematic.

Install-Module -Name CredentialManager

Back-up

$credentials = Get-StoredCredential -Target "git:https://github.com/"
Export-Clixml -InputObject $credentials -Path "C:\Path\to\YourBackup.xml"

ATTENTION: keep this YourBackup.xml as private as your password

Restore

$credentials = Import-Clixml -Path "C:\Path\to\YourBackup.xml"
New-StoredCredential -Target $credentials.Target -UserName $credentials.UserName -SecurePassword $credentials.Password -Persist LocalMachine

Delete

Remove-StoredCredential -Target "git:https://github.com/"