来自https://gist.github.com/susanBuck/ee3a0a53d72198c1a244

# If not running interactively, don't do anything
[ -z "$PS1" ] && return


# ------------------------------------
# ALIASES
# ------------------------------------
# Edit .bashrc
alias bashedit='sudo open -a TextEdit ~/.bashrc'

# Force terminal to recognize changes to .bashrc
alias bashrefresh='source ~/.bashrc'

# Ideal directory listing
alias ll="ls -laFG"
# -l list in long format
# -F Display a...
#       slash (`/') immediately after each pathname that is a directory,
#       asterisk (`*') after each that is executable,
#       at sign (`@') after each symbolic link
#       equals sign (`=') after each socket,
#       percent sign (`%') after each whiteout,
#       vertical bar (`|') after each that is a FIFO.
# -G = Color
# -a = Show hidden files

# Ask before removing files
alias rm='rm -i'

# Search history. Example usage: `histg git` to recent commands that use git
alias histg="history | grep"

# Get your current IP
alias myip="curl http://ipecho.net/plain; echo"

# Example alias for SSH'ing into a server
alias myserver="ssh user@111.111.111.111"

# Example alias for quickly getting to a commonly used directory
alias htdocs='cd /Applications/MAMP/htdocs'


# ------------------------------------
# Color variables
# ------------------------------------
# Regular Colors
Black='\e[0;30m'
Red='\e[0;31m'
Green='\e[0;32m'
Yellow='\e[0;33m'
Blue='\e[0;34m'
Purple='\e[0;35m'
Cyan='\e[0;36m'
White='\e[0;37m'
Light_Gray='\033[0;37m'

# Bold
BBlack='\e[1;30m'
BRed='\e[1;31m'
BGreen='\e[1;32m'
BYellow='\e[1;33m'
BBlue='\e[1;34m'
BPurple='\e[1;35m'
BCyan='\e[1;36m'
BWhite='\e[1;37m'
BLight_Gray='\033[1;37m'

# Reset colors
NONE="\e[0m"


# ------------------------------------
# Configure prompt
# Includes special handling for git repos
# ------------------------------------
# When in a git repo, this method is used to determine the current branch
function parse_git_branch {
    git branch 2>/dev/null | grep '^*' | sed 's_^..__' | sed 's_\(.*\)_(\1)_'
}

# When in a git repo, this method is used to determine if there are changes
function git_dirty {
    git diff --quiet HEAD &>/dev/null
    [ $? == 1 ] && echo "!"
}

# Variables
ps1_user="$Blue\u$NONE"
ps1_host="$Green\h$NONE"
ps1_dir="$Purple\w$NONE"
ps1_git="$Cyan \$(parse_git_branch)$Red \$(git_dirty)$NONE "

# Option 1 user@host:dir(branch)! $
# export PS1="${ps1_user}@${ps1_host}:${ps1_dir}${ps1_git}\$ "

# Option 2 dir(branch)! $
#export PS1="${ps1_dir}${ps1_git}\$ "

export PS1="${ps1_dir}${ps1_git}\$ "


# ------------------------------------
# MOTD (Message of the Day)
# What you see when Terminal opens
# ------------------------------------

printf $BBlack
echo "----------------------------"
echo "Loaded ~/.bashrc"
echo ""
echo "To edit run: bashedit"
echo "To refresh run: bashrefresh"
echo "All aliases: alias"
echo ""
echo "You are: `whoami`"
echo "You're in: `pwd`"
echo "----------------------------"
printf $NONE