From Wicked Cool Shell Scripts, 2nd Edition

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#!/usr/bin/env bash

function initializeANSI () {

    esc="\033" # 如果无效，直接敲 ESC 键。

    # 前景色：
    blackf="${esc}[30m"; redf="${esc}[31m"; greenf="${esc}[32m"
    yellowf="${esc}[33m" bluef="${esc}[34m"; purplef="${esc}[35m"
    cyanf="${esc}[36m"; whitef="${esc}[37m"

    # 背景色：
    blackb="${esc}[40m"; redb="${esc}[41m"; greenb="${esc}[42m"
    yellowb="${esc}[43m" blueb="${esc}[44m"; purpleb="${esc}[45m"
    cyanb="${esc}[46m"; whiteb="${esc}[47m"

    # 粗体、斜体、下划线以及样式切换：
    boldon="${esc}[1m"; boldoff="${esc}[22m"
    italicson="${esc}[3m"; italicsoff="${esc}[23m"
    ulon="${esc}[4m"; uloff="${esc}[24m"
    invon="${esc}[7m"; invoff="${esc}[27m"
    reset="${esc}[0m"
}

initializeANSI
echo -e "
${yellowf}This is a phrase in yellow${redb} and red${reset}
${boldon}This is bold${ulon} this is italics${reset} bye-bye
${italicson}This is italics${italicsoff} and this is not
${ulon}This is ul${uloff} and this is not
${invon}This is inv${invoff} and this is not
${yellowf}${redb}Warning I ${yellowb}${redf}Warning II${reset}
"

Add snippets for shell common comment

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{
	"Print to shellNote": {
		"prefix": "shell",
		"body": [
			" # Description: $1",
			" # Author:      Your Name",
			" # Date:        ${CURRENT_YEAR}-${CURRENT_MONTH}-${CURRENT_DATE}"
		],
		"description": "shel script comment"
	}
}