prompt

#!/usr/bin/env bash

# Unless running interactively, no need to continue
[[ $- != *i* ]] && return

# ------------------------------------------------------------------------------
# Set user-defined locale
# export LANG=$(locale -uU)

###############################################################################
# Shell behavior                                                              #
###############################################################################

# Increase the history file size and set some sane defaults
export HISTSIZE=20000
export HISTFILESIZE=10000
# See https://ostechnix.com/how-to-avoid-duplicate-entries-in-bash-history-in-linux/
export HISTCONTROL=ignoredups:erasedups:ignorespace
export HISTTIMEFORMAT="%d/%m/%y %T "

bash_prompt() {
    # regular colors
    local K="\[\033[0;30m\]"    # black
    local R="\[\033[0;31m\]"    # red
    local G="\[\033[0;32m\]"    # green
    local Y="\[\033[0;33m\]"    # yellow
    local B="\[\033[0;34m\]"    # blue
    local M="\[\033[0;35m\]"    # magenta
    local C="\[\033[0;36m\]"    # cyan
    local W="\[\033[0;37m\]"    # white

    # emphasized (bolded) colors
    local BK="\[\033[1;30m\]"
    local BR="\[\033[1;31m\]"
    local BG="\[\033[1;32m\]"
    local BY="\[\033[1;33m\]"
    local BB="\[\033[1;34m\]"
    local BM="\[\033[1;35m\]"
    local BC="\[\033[1;36m\]"
    local BW="\[\033[1;37m\]"

    # reset
    local RESET="\[\033[0;37m\]"

    # curl -L -o ~/.git-prompt.sh https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh

    GIT_PROMPT_ONLY_IN_REPO=1
    if [ -f /usr/share/git/git-prompt.sh ]; then
        . /usr/share/git/git-prompt.sh
    elif [ -f ~/.git-prompt.sh ]; then
        . ~/.git-prompt.sh
    elif [ -f ~/.bash-git-prompt/gitprompt.sh ]; then
        . ~/.bash-git-prompt/gitprompt.sh
    fi

    local _PS_COLOR=32m
    [ "$(id -u)" -eq 0 ] && _PS_COLOR=31m

    # If the git completion function exists, then use its built-in command prompt
    if command -v __git_ps1 > /dev/null; then
        export PS1="\[\e]0;\w\a\]\n\[\e[$_PS_COLOR\]\u@\h\[\033[36m\]\`__git_ps1\`\[\e[0m\] \[\e[33m\]\w\[\e[0m\]\n> ";
    else
        export PS1="\[\e]0;\w\a\]\n\[\e[$_PS_COLOR\]\u@\h \[\e[33m\]\w\[\e[0m\]\n> ";
    fi
}

# ------------------------------------------------------------------------------
# Is bash-completion installed ?
_init_complete;

# ------------------------------------------------------------------------------
# set PS1
[ -n "$BASH" ] && bash_prompt;

# ------------------------------------------------------------------------------
if command -v shopt > /dev/null; then
    # there is `setopt` in zsh, but we prefer defaults for zsh

    # Check the window size after each command and, if necessary, update the values of LINES and COLUMNS.
    shopt -s checkwinsize

    # Append all commands to the history file; don't overwrite it at the start of every new session
    shopt -s histappend
fi

# Use vi keybindings
# set -o vi