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Linux shell #! interpreter All In One

指定脚本解释器的路径

Python

Python 3

#!/usr/bin/env python3

# ✅ 推荐写法, 动态读取 env 配置的解释器路径，切换系统环境不会报错，可移植性高 🚀 

#!/usr/bin/python3

# 👎 不推荐写法，写死了解释器路径，切换系统环境有可能会报错，可移植性低 

https://www.runoob.com/python3/python3-tutorial.html

GPIO

#!/usr/bin/env python3

# coding: utf8

import RPi.GPIO as GPIO

import time
import sys

arg1 = sys.argv[1]

print("arg1 =", arg1);

# 指定 BCM 模式下的GPIO 针脚编号
PIN = 12
# BCM 模式
GPIO.setmode(GPIO.BCM)

# 指定 GPIO 针脚为一个电流输出针脚
GPIO.setup(PIN, GPIO.OUT)

# 输出低电平
GPIO.output(PIN, GPIO.LOW)

# index
i = 0
# max
# n = 7

# 类型转换，str => int
n = int(arg1)

print("n =", n)

print('开始闪烁⏳')

while (i < n):
    print("i =", i)
    # 高电平，LED 点亮
    GPIO.output(PIN, GPIO.HIGH)
    # 休眠 1 秒，防止 LED 长时间点亮烧坏了
    time.sleep(1.0)
    # 低电平，LED 熄灭
    GPIO.output(PIN, GPIO.LOW)
    # 休眠 1 秒
    time.sleep(1.0)
    i = i + 1

# 输出低电平，LED 关闭
# GPIO.output(PIN, GPIO.LOW)

# 清除，释放内存
GPIO.cleanup()

print('结束闪烁 👌🏻')

Node.js CLI

#!/usr/bin/env node

# ✅ 推荐写法, 动态读取 env 配置的解释器路径，切换系统环境不会报错，可移植性高 🚀 

#!/usr/bin/node

# 👎 不推荐写法，写死了解释器路径，切换系统环境有可能会报错，可移植性低 

cli

#!/usr/bin/env node

/**
 * [nct : node cli tools]
 * @author: xgqfrms
 * @date: 2017-06-12
 */

const nct = require('./libs');

const username = process.argv[2] || `xgqfrms-GitHub`;
const repo = process.argv[3] || `Node-CLI-Tools`;

nct(username, repo);

https://github.com/xgqfrms-GitHub/Node-CLI-Tools

https://node-cli-tools.xgqfrms.xyz/

refs

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