Display the git branch name at the prompt and follows branch switching
The PROMPT_COMMAND variable is evaluated just before the prompt is displayed, so it is useful for dynamically displaying a branch name at the prompt.
In my .bashrc, I use PROMPT_COMMAND to display the branch name in the prompt as follows.
set_prompt() {
PS1="\[\e]0;\u@\h: \w\a\]\[\033[01;32m\]\u\[\033[00m\]@\[\033[01;34m\]\w\[\033[00m\]($(git branch --show-current 2>/dev/null))\n$ "
}
PROMPT_COMMAND=set_prompt
You can display the current branch name following a branch switch with git switch or git checkout as follows.
If PROMPT_COMMAND is not set, switching branches will leave the previous branch name at the prompt.
Without PROMPT_COMMAND, we will have to do source ~/.bashrc manually or use git's post-checkout hook.