Github switch user

gitconfig-multi-ssh.txt

# This is a script for .gitconfig and .ssh/config to manage and switch between user accounts. If first argument to ctx is left empty it is considered default otherwise we append to github.com-*

```

[alias]
     ctx = "!f() { LABEL=$1; EMAIL=$2; NAME=$3; CURRENT=$(git remote get-url origin); FROM=$(echo \"$CURRENT\" | grep -oE 'git@github\\.com(-[^:]*)?'); if [ -z \"$LABEL\" ]; then TO=\"git@github.com\"; elif echo \"$FROM\" | grep -q -- \"-$LABEL\"; then TO=\"git@github.com\"; else TO=\"git@github.com-$LABEL\"; fi; NEW=$(echo \"$CURRENT\" | sed \"s|$FROM|$TO|\"); git remote set-url origin \"$NEW\"; git config user.email \"$EMAIL\" && git config user.name \"$NAME\" && echo \"* Switched to ${LABEL:-default}: $EMAIL\"; }; f"
    whoami = "!echo \"Current email: $(git config user.email)\" && git remote -v | head -n1"

    private = "!git ctx private '<private email>' '<private name>'"
    default = "!git ctx '' '<work email>' '<work name>'"

```

Apply it on the .ssh/config:
```
Host github.com gist.github.com
  HostName github.com
  User git
  IdentityFile ~/.ssh/keys/id_ed12344
  RequestTTY no
  IdentitiesOnly yes

Host github.com-private
  HostName github.com
  User git
  IdentityFile ~/.ssh/keys/id_ed12345
  RequestTTY no
  IdentitiesOnly yes
```