PS1 with git status without any extra dependencies

In this guide, we will add git status to the command line prompt without any extra dependencies.

Our new prompt has the following additional functionality:

If the command exits with a non-zero status, it will show the exit code in red, e.g., ✘127.
The username and hostname are shown in green, e.g., user@hostname (should prevent the user from executing commands on the wrong host).
The current working directory is shown in blue.
The git status is shown in square brackets (only if inside a git repository):
- The branch name is shown in yellow.
- Untracked files are shown with a yellow question mark.
- Staged files are shown with a green plus sign.
- Unstaged files are shown with a red exclamation mark.
- Ahead and behind of upstream are shown with up and down arrows, respectively.
The prompt is split into multiple lines for better readability.

Open your ~/.bashrc file and add the following snippet:

function git_status_prompt() {
    local git_info=""
    if git rev-parse --is-inside-work-tree &>/dev/null; then
        # Define colors
        local branch_color="\033[0;33m"     # Yellow for branch name
        local reset_color="\033[0m"         # Reset to default color
        local untracked_color="\033[1;33m"  # Bold yellow for untracked
        local staged_color="\033[1;32m"     # Bold green for staged
        local unstaged_color="\033[1;31m"   # Bold red for unstaged

        # Show branch name if on a branch, otherwise show commit hash
        local branch_name=$(git symbolic-ref --short -q HEAD 2>/dev/null)
        if [[ -n "$branch_name" ]]; then
            git_info+="[${branch_color}${branch_name}${reset_color}"
        else
            git_info+="[${branch_color}@$(git rev-parse --short HEAD)${reset_color}"
        fi

        # Add additional status indicators with respective colors
        [[ -n $(git ls-files --others --exclude-standard) ]] && git_info+=" ${untracked_color}?${reset_color}"
        ! git diff --cached --quiet && git_info+=" ${staged_color}+${reset_color}"
        ! git diff --quiet && git_info+=" ${unstaged_color}!${reset_color}"

        # Ahead/behind of upstream
        local ahead=$(git rev-list --count @{u}..HEAD 2>/dev/null)
        local behind=$(git rev-list --count HEAD..@{u} 2>/dev/null)
        [[ $ahead -gt 0 ]] && git_info+=" ⇡$ahead"
        [[ $behind -gt 0 ]] && git_info+=" ⇣$behind"

        # Close the square bracket
        git_info+="]"
    fi
    echo -e "$git_info"
}
PS1='$(if [ $? -ne 0 ]; then echo "\[\e[0;31m\]✘$? \[\e[0m\] "; fi)\[\e[01;32m\]\u@\h\[\e[0m\] \[\e[01;34m\]\w\[\e[0m\] $(git_status_prompt)\n\$ '

Apply the changes by running:

source ~/.bashrc

notes

notes

PS1 with git status without any extra dependencies