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() { \
    debug() { \
      if [ \"$DEBUG\" = \"1\" ]; then \
        echo \"[DEBUG] $*\"; \
      fi; \
    }; \
    \
    get_host() { \
      echo \"$1\" | sed -E 's#(ssh://)?(git@[^/:]+).*#\\2#'; \
    }; \
    \
    get_scheme() { \
      echo \"$1\" | sed -E 's#((ssh://)?git@[^/:]+).*#\\1#' | grep -o '^ssh://'; \
    }; \
    \
    base_host() { \
      echo \"$1\" | sed -E 's/-[^.]+//'; \
    }; \
    \
    build_host() { \
      HOST=\"$1\"; \
      LABEL=\"$2\"; \
      BASE=$(base_host \"$HOST\"); \
      \
      if [ -z \"$LABEL\" ]; then \
        echo \"$BASE\"; \
      elif echo \"$HOST\" | grep -q -- \"-$LABEL\"; then \
    }; \
    \
    base_host() { \
      echo \"$1\" | sed -E 's/-[^.]+//'; \
    }; \
    \
    build_host() { \
      HOST=\"$1\"; \
      LABEL=\"$2\"; \
      BASE=$(base_host \"$HOST\"); \
      \
      if [ -z \"$LABEL\" ]; then \
        echo \"$BASE\"; \
      elif echo \"$HOST\" | grep -q -- \"-$LABEL\"; then \
        echo \"$BASE\"; \
      else \
        echo \"${BASE}-${LABEL}\"; \
      fi; \
    }; \
    \
    replace_host() { \
      URL=\"$1\"; \
      FROM=\"$2\"; \
      TO=\"$3\"; \
      echo \"$URL\" | sed \"s|$FROM|$TO|\"; \
    }; \
    \
    LABEL=\"$1\"; \
    EMAIL=\"$2\"; \
    NAME=\"$3\"; \
    DEBUG=\"$4\"; \
    \
    CURRENT=$(git remote get-url origin); \
    debug \"CURRENT=$CURRENT\"; \
    \
    FROM=$(get_host \"$CURRENT\"); \
    debug \"FROM=$FROM\"; \
    \
    TO=$(build_host \"$FROM\" \"$LABEL\"); \
    debug \"TO=$TO\"; \
    \
    NEW=$(replace_host \"$CURRENT\" \"$FROM\" \"$TO\"); \
    debug \"NEW=$NEW\"; \
    \
    git remote set-url origin \"$NEW\" && \
    git config user.email \"$EMAIL\" && \
    git config user.name \"$NAME\" && \
    echo \"* Switched to ${LABEL:-default}\" && \
    echo \"  Email: $EMAIL\" && \
    echo \"  Remote: $NEW\"; \
  }; f"

 whoami = "!echo \"Current email: $(git config user.email)\" && git remote -v | head -n1"

    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
```