bash/prompt.bash


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# bash prompt

if [[ -n "$INSIDE_EMACS" ]]; then
    PS1="\n\[\e[34m\]\$ \[\e[0m\]"
else
    PS1=

    # user, host, and cwd
    PROMPT_DIRTRIM=3 # how many dirs above current to print (rest are '...')
    PS1+='\[\e[0;46m\]\u@\h \w'

    # git bit
    # see https://unix.stackexchange.com/questions/278206
    possible_git_prompt_locations=(
        /usr/share/git/git-prompt.sh # Arch, etc. (default?)
        /usr/lib/git-core/git-sh-prompt # Debian, Ubuntu ...
        /usr/share/git-core/contrib/completion/git-prompt.sh # Fedora ??
        # I have yet to find Alpine's git prompt location.
    )

    for file in "${possible_git_prompt_locations[@]}"; do
        if [[ -f "$file" ]]; then
            source "$file" &&
                PS1+='\[\e[35m\]$(__git_ps1)'
            break
        fi
    done

    # newline
    PS1+='\[\e[0m\]\n'

    # exit code (only if error)
    __prompt_exit_code() {
        local ec=$?
        (( $ec > 0 )) &&
            printf "$ec"
    }
    PS1+='\[\e[31m\]$(__prompt_exit_code)\[\e[0m\]'

    # delimiter
    PS1+='; '
fi