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我们开发就是喜欢各种酷炫的东西，对于有洁癖的我，连命令行都不放过了

先上图看效果，命令行显示高亮部分

实现过程：

第一步：.bash_prompt脚本

# ~/.bash_prompt

# This prompt inspired by gf3, sindresorhus, alrra, and mathiasbynens.

# but customized to me. <3

default_username='paulirish'

#eval "$(thefuck --alias)"

if [[ -n "$ZSH_VERSION" ]]; then  # quit now if in zsh

    return 1 2> /dev/null || exit 1;

fi;

if [[ $COLORTERM = gnome-* && $TERM = xterm ]] && infocmp gnome-256color >/dev/null 2>&1; then

    export TERM=gnome-256color

elif infocmp xterm-256color >/dev/null 2>&1; then

    export TERM=xterm-256color

fi

set_prompts() {

    local black="" blue="" bold="" cyan="" green="" orange="" \

          purple="" red="" reset="" white="" yellow=""

    local dateCmd=""

    if [ -x /usr/bin/tput ] && tput setaf 1 &> /dev/null; then

        tput sgr0 # Reset colors

        bold=$(tput bold)

        reset=$(tput sgr0)

        # Solarized colors

        # (https://github.com/altercation/solarized/tree/master/iterm2-colors-solarized#the-values)

        black=$(tput setaf 0)

        blue=$(tput setaf 33)

        cyan=$(tput setaf 37)

        green=$(tput setaf 190)

        orange=$(tput setaf 172)

        purple=$(tput setaf 141)

        red=$(tput setaf 124)

        violet=$(tput setaf 61)

        magenta=$(tput setaf 9)

        white=$(tput setaf 8)

        yellow=$(tput setaf 136)

    else

        bold=""

        reset="\e[0m"

        black="\e[1;30m"

        blue="\e[1;34m"

        cyan="\e[1;36m"

        green="\e[1;32m"

        orange="\e[1;33m"

        purple="\e[1;35m"

        red="\e[1;31m"

        magenta="\e[1;31m"

        violet="\e[1;35m"

        white="\e[1;37m"

        yellow="\e[1;33m"

    fi

    # Only show username/host if not default

    function usernamehost() {

        # Highlight the user name when logged in as root.

        if [[ "${USER}" == *"root" ]]; then

            userStyle="${red}";

        else

            userStyle="${magenta}";

        fi;

        userhost=""

        userhost+="\[${userStyle}\]$USER "

        userhost+="${white}at "

        userhost+="${orange}$HOSTNAME "

        userhost+="${white}in"

        if [ $USER != "$default_username" ]; then echo $userhost ""; fi

    }

    function prompt_git() {

        # this is >5x faster than mathias's.

        # check if we're in a git repo. (fast)

        git rev-parse --is-inside-work-tree &>/dev/null || return

        # check for what branch we're on. (fast)

        #   if… HEAD isn’t a symbolic ref (typical branch),

        #   then… get a tracking remote branch or tag

        #   otherwise… get the short SHA for the latest commit

        #   lastly just give up.

        branchName="$(git symbolic-ref --quiet --short HEAD 2> /dev/null || \

            git describe --all --exact-match HEAD 2> /dev/null || \

            git rev-parse --short HEAD 2> /dev/null || \

            echo '(unknown)')";

        ## early exit for Chromium & Blink repo, as the dirty check takes ~5s

        ## also recommended (via goo.gl/wAVZLa ) : sudo sysctl kern.maxvnodes=$((512*1024))

        repoUrl=$(git config --get remote.origin.url)

        if grep -q chromium.googlesource.com <<<$repoUrl; then

            dirty=" ⁂"

        else

            # check if it's dirty (slow)

            #   technique via github.com/git/git/blob/355d4e173/contrib/completion/git-prompt.sh#L472-L475

            dirty=$(git diff --no-ext-diff --quiet --ignore-submodules --exit-code || echo -e "*")

            # mathias has a few more checks some may like:

            #    github.com/mathiasbynens/dotfiles/blob/a8bd0d4300/.bash_prompt#L30-L43

        fi

        [ -n "${s}" ] && s=" [${s}]";

        echo -e "${1}${branchName}${2}$dirty";

        return

    }

    # ------------------------------------------------------------------

    # | Prompt string                                                  |

    # ------------------------------------------------------------------

    PS1="\[\033]0;\w\007\]"                                 # terminal title (set to the current working directory)

    PS1+="\n\[$bold\]"

    PS1+="\[$(usernamehost)\]"                              # username at host

    PS1+="\[$green\]\w"                                     # working directory

    PS1+="\$(prompt_git \"$white on $purple\" \"$cyan\")"   # git repository details

    PS1+="\n"

    PS1+="\[$reset$white\]\\$ \[$reset\]"

    export PS1

    # ------------------------------------------------------------------

    # | Subshell prompt string                                         |

    # ------------------------------------------------------------------

    export PS2="⚡ "

    # ------------------------------------------------------------------

    # | Debug prompt string  (when using `set -x`)                     |

    # ------------------------------------------------------------------

    # When debugging a shell script via `set -x` this tricked-out prompt is used.

    # The first character (+) is used and repeated for stack depth

    # Then, we log the current time, filename and line number, followed by function name, followed by actual source line

    # FWIW, I have spent hours attempting to get time-per-command in here, but it's not possible. ~paul

    export PS4='+ \011\e[1;30m\t\011\e[1;34m${BASH_SOURCE}\e[0m:\e[1;36m${LINENO}\e[0m \011 ${FUNCNAME[0]:+\e[0;35m${FUNCNAME[0]}\e[1;30m()\e[0m:\011\011 }'

    # shoutouts:

    #   https://github.com/dholm/dotshell/blob/master/.local/lib/sh/profile.sh is quite nice.

    #   zprof is also hot.

}

set_prompts

unset set_prompts

第二步：加入bash_profile

$ vim ~/.bash_profile

## add code to buttom

[[ -s $HOME/.bash_prompt ]] && source $HOME/.bash_prompt

重新打开命令行或者执行 source ~/.bash_profile 就可以看到效果了，是不是非常炫呀

------------------------我是优雅分割线-----------------------

命令行佛祖像

$ vim ~/.bash_profile

## add code to buttom

echo -ne "\033[0;33m"

cat<<EOT

                                  _oo0oo_

                                 088888880

                                 88" . "88

                                 (| -_- |)

                                  0\ = /0

                               ___/'---'\___

                             .' \\\\|     |// '.

                            / \\\\|||  :  |||// \\

                           /_ ||||| -:- |||||- \\

                          |   | \\\\\\  -  /// |   |

                          | \_|  ''\---/''  |_/ |

                          \  .-\__  '-'  __/-.  /

                        ___'. .'  /--.--\  '. .'___

                     ."" '<  '.___\_<|>_/___.' >'  "".

                    | | : '-  \'.;'\ _ /';.'/ - ' : | |

                    \  \ '_.   \_ __\ /__ _/   .-' /  /

                ====='-.____'.___ \_____/___.-'____.-'=====

                                  '=---='

              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

                        天下武功  iii  唯快不破

EOT

echo -ne "\033[m"