feh momentum

cycle.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"math/rand"
	"os"
	"os/exec"
	"syscall"
	"time"
)

func momentumVersion(prefix string) (error, string) {
	files, err := ioutil.ReadDir(prefix)
	if err != nil {
		log.Println("不能读取目录")
		return nil, ""
	}

	if len(files) != 1 {
		log.Fatalln("版本路径获取错误")
		return nil, ""
	}

	return nil, files[0].Name()
}

func momentumPictures(prefix string) ([]string, error) {
	files, err := ioutil.ReadDir(prefix)
	if err != nil {
		log.Println("不能读取目录")
		return nil, err
	}

	// outputFiles := make([]string, len(files))
	var outputFiles []string
	for _, file := range files {
		outputFiles = append(outputFiles, file.Name())
	}

	return outputFiles, nil
}

func main() {
	fmt.Println("fuck")

	// 不确定这个app id是不是保持不变的。可能是作为参数。
	momentumAppId := "laookkfknpbbblfpciffpaejjkokdgca"
	chromiumExntensionPath := "/.config/chromium/Default/Extensions"

	home := os.Getenv("HOME")
	if home == "" {
		log.Fatal("HOME 变量获取错误")
	}

	path := fmt.Sprintf("%s%s/%s", home, chromiumExntensionPath, momentumAppId)
	log.Println(path)

	err, version := momentumVersion(path)
	if err != nil {
		log.Fatal("获取版本错误")
	}

	log.Printf("version: %s\n", version)

	path = fmt.Sprintf("%s/%s/backgrounds", path, version)
	log.Println(path)

	files, err := momentumPictures(path)
	if err != nil {
		log.Fatal("no pictures")
	}

	for _, file := range files {
		log.Printf("file: [%s]\n", file)
	}

	source := rand.NewSource(time.Now().UnixNano())
	random := rand.New(source)

	nth := random.Intn(len(files))
	picture := fmt.Sprintf("%s/%s", path, files[nth])
	log.Printf("picture: %s\n", picture)

	feh, err := exec.LookPath("feh")
	if err != nil {
		log.Fatal("找不到可执行文件")
	}

	argv := []string{"feh", "--bg-scale", picture}
	env := os.Environ()
	if execError := syscall.Exec(feh, argv, env); execError != nil {
		log.Fatal("执行文件错误")
	}
}