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Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

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// refer to http://stackoverflow.com/questions/8286806/go-programming-language-mutual-concurrent-execution
// https://gobyexample.com/mutexes
package main

import "sync"

var m sync.Mutex
var wg sync.WaitGroup

func routine1() {

ilmsg

func DoReq() error {
	resp, err := http.Get("http://localhost:8080/ping")
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return errors.New("bad response")
	}

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package main

import (
    pixel "example/pixel"
    "log"
    "os"
    "os/signal"
    "syscall"
    "time"

ilmsg

Introduction
For an introduction to Git and how to install, please refer to the introduction tutorial.

This article will teach you how to use Git when you want to deploy your application. While there are many ways to use Git to deploy our application, this tutorial will focus on the one that is most straightforward. I assume you already know how to create and use a repository on your local machine. If not, please refer to this tutorial.

When you use Git, the workflow generally is toward version control only. You have a local repository where you work and a remote repository where you keep everything in sync and can work with a team and different machines. But you can also use Git to move your application to production.

Server Setup
Our fictitious workspace:

ilmsg

import struct
import ubluetooth as bt
from micropython import const

MANUFACTURER_ID         = const(0x004C)
DEVICE_TYPE             = const(0x02)
DATA_LENGTH             = const(0x15)
BR_EDR_NOT_SUPPORTED    = const(0x04)
FLAG_BROADCAST          = const(0x01)
MANUFACTURER_DATA       = const(0xFF)

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package main

import (
	"errors"
	"net/http"
	"strconv"
	"strings"
	"time"

	"github.com/dgrijalva/jwt-go"

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package main

import (
	"fmt"
	"log"

	"github.com/gin-gonic/gin"
)

type CreateParams struct {

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package main

import (
	"encoding/json"
	"flag"
	"io"
	"net/http"

	"github.com/golang/glog"
	"golang.org/x/net/websocket"

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1. choose a simple linux image

For example alpine, it's only about 5MB.

2. set timezone if necessary

RUN apk add --no-cache tzdata
ENV TZ America/New_York