Go CLI Playground

azdeploy.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"os/exec"
	"path/filepath"
	"runtime"

	"github.com/urfave/cli"
)

func main() {
	app := cli.NewApp()
	app.Name = "azdeploy"
	app.Usage = "Deploy Azure template"
	app.Version = "2019.5.1"

	var powershell string
	var lookupErr error
	if runtime.GOOS == "windows" {
		powershell, lookupErr = exec.LookPath("powershell")
		if lookupErr != nil {
			log.Fatal(lookupErr)
		}
	} else {
		powershell, lookupErr = exec.LookPath("pwsh")
		if lookupErr != nil {
			log.Fatal(lookupErr)
		}
	}
	var project, env string
	app.Flags = []cli.Flag{
		cli.StringFlag{
			Name:        "project, p",
			Usage:       "name of the project to deploy",
			Destination: &project,
		},
		cli.StringFlag{
			Name:        "env, e",
			Usage:       "environment to deploy (e.g. qa, dev)",
			Destination: &env,
		},
	}

	app.Action = func(c *cli.Context) error {
		if project != "" && env != "" {
			fmt.Println("Deploying", env, "environment for", project, "project")
			scriptPath := filepath.Join(os.Getenv("TEMP"), "azdeploy.ps1")
			writeScript(scriptPath)
			cmd := exec.Command(powershell, "-NoProfile", "-File", scriptPath)

			cmd.Stdout = os.Stdout
			cmd.Stderr = os.Stderr
			err := cmd.Run()
			if err != nil {
				log.Fatal(err)
			}
		} else {
			cli.ShowAppHelpAndExit(c, 1)
		}
		return nil
	}
	err := app.Run(os.Args)
	if err != nil {
		log.Fatal(err)
	}
}

func writeScript(path string) {
	script := []byte(`
	"hello, world from $((Get-Process -Name azdeploy).Name)"
	`)
	err := ioutil.WriteFile(path, script, 0644)
	if err != nil {
		log.Fatal("Unable to generate deployment script")
	}
}

Why.... WHHHHHHYYYYYYYYY?!?!?!