mirror of https://github.com/byReqz/go-etcher.git
restructure packages and start picking apart functions
This commit is contained in:
Nils
parent
d0f0957932
commit
0625418d9d
GPG Key ID:
396A62D7D436749E
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@ -0,0 +1,283 @@
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// package cetcher is the cli app for the go-etcher project
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package cetcher
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import (
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"crypto/sha256"
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"fmt"
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"io"
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"log"
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"os"
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"strings"
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"time"
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ac "github.com/JoaoDanielRufino/go-input-autocomplete"
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"github.com/briandowns/spinner"
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"github.com/byReqz/go-etcher/etcher"
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"github.com/fatih/color"
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"github.com/schollz/progressbar/v3"
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flag "github.com/spf13/pflag"
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)
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var device string
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var input string
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var force bool
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var disable_hash bool
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func init() {
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flag.StringVarP(&device, "device", "d", "", "target device")
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flag.StringVarP(&input, "input", "i", "", "input file")
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flag.BoolVarP(&force, "force", "f", false, "override safety features")
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flag.BoolVarP(&disable_hash, "no-hash", "n", false, "disable hash verification")
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flag.Parse()
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}
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func GetPath() string {
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path, err := ac.Read("[ " + color.YellowString("i") + " ] Please input your image file: ")
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if err != nil {
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log.Fatal(err)
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}
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path = strings.TrimSpace(path)
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if strings.HasPrefix(path, "~/") {
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homedir, err := os.UserHomeDir()
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if err != nil {
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log.Fatal(err)
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}
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return homedir + path[1:]
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}
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if path == "" {
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fmt.Println("[", color.RedString("!"), "] No image given, retrying.")
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path = GetPath()
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}
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return path
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}
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func GetDest() string {
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PrintAvail()
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dest, err := ac.Read("[ " + color.YellowString("i") + " ] Please input destination: ")
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if err != nil {
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log.Fatal(err)
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}
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dest = strings.TrimSpace(dest)
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if strings.HasPrefix(dest, "~/") {
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homedir, err := os.UserHomeDir()
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if err != nil {
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log.Fatal(err)
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}
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return homedir + dest[1:]
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}
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if dest == "" {
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fmt.Println("[", color.RedString("!"), "] No destination given, retrying.")
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dest = GetDest()
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}
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return dest
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}
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func WriteImage(image *os.File, target *os.File, size int64) (int64, error) {
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bar := progressbar.NewOptions(int(size),
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progressbar.OptionSetWriter(os.Stderr),
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progressbar.OptionShowBytes(true),
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progressbar.OptionSetWidth(25),
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progressbar.OptionSetDescription("Writing image file..."),
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progressbar.OptionSetTheme(progressbar.Theme{
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Saucer: "=",
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SaucerHead: ">",
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SaucerPadding: " ",
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BarStart: "[",
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BarEnd: "]",
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}))
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writer := io.MultiWriter(target, bar)
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written, err := io.Copy(writer, image)
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if err != nil {
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return 0, err
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}
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return written, err
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}
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func PrintAvail() {
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devices, err := etcher.GetBlockdevices()
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println("Available devices:")
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for _, dev := range devices {
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fmt.Print(" * ", dev.Path)
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if dev.Size > 0 {
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fmt.Print(" [", (dev.Size / 1024 / 1024 / 1024), "GB]\n")
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} else {
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fmt.Println("")
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}
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}
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}
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func Main() {
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s := spinner.New(spinner.CharSets[14], 100*time.Millisecond)
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if input == "" {
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if len(flag.Args()) == 0 {
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input = GetPath()
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} else if len(flag.Args()) > 0 {
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input = flag.Args()[0]
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}
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}
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if device == "" {
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if len(flag.Args()) == 0 {
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device = GetDest()
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} else if len(flag.Args()) > 0 {
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if input == flag.Args()[0] && len(flag.Args()) > 1 {
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device = flag.Args()[1]
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} else if input != flag.Args()[0] && len(flag.Args()) > 0 {
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device = flag.Args()[0]
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}
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}
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}
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s.Prefix = "[ "
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s.Suffix = " ] Getting file details"
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s.Start()
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statinput, err := os.Stat(input)
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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statdevice, err := os.Stat(device)
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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image, err := os.Open(input)
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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var inputsize int64
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var inputisblock bool
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if statinput.Size() != 0 {
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inputsize = statinput.Size()
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inputisblock = false
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} else {
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inputsize, _ = image.Seek(0, io.SeekEnd)
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inputisblock = true
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_, _ = image.Seek(0, 0)
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}
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target, err := os.OpenFile(device, os.O_RDWR, 0660)
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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var targetsize int64
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var targetisblock bool
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if statdevice.Size() != 0 {
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targetsize = statdevice.Size()
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targetisblock = false
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} else {
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targetsize, err = target.Seek(0, io.SeekEnd)
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targetisblock = true
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_, _ = target.Seek(0, 0)
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}
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prehash := sha256.New()
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if !(force || disable_hash) {
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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_, err = io.Copy(prehash, image)
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_, _ = image.Seek(0, 0)
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}
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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} else {
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s.Stop()
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fmt.Println("\r[", color.GreenString("✓"), "] Getting file details ")
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}
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inputmb := fmt.Sprint("[", inputsize/1024/1024, "MB]")
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devicemb := fmt.Sprint("[", targetsize/1024/1024, "MB]")
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var inputblock string
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var targetblock string
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if inputisblock {
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inputblock = "[Blockdevice]"
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} else {
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inputblock = "[File]"
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}
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if targetisblock {
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targetblock = "[Blockdevice]"
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} else {
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targetblock = "[File]"
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}
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fmt.Println("[", color.BlueString("i"), "] Input device/file: "+input, inputmb, inputblock)
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fmt.Println("[", color.BlueString("i"), "] Output device/file: "+device, devicemb, targetblock)
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if !force {
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if inputsize > targetsize {
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fmt.Println("[", color.RedString("w"), "]", color.RedString(" Warning:"), "Input file seems to be bigger than the destination!")
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}
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fmt.Print(color.HiWhiteString("Do you want to continue? [y/N]: "))
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var yesno string
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_, _ = fmt.Scanln(&yesno)
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yesno = strings.TrimSpace(yesno)
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if !(yesno == "y" || yesno == "Y") {
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log.Fatal("aborted")
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}
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}
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written, err := WriteImage(image, target, inputsize)
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_, _ = target.Seek(0, 0)
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if err != nil {
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fmt.Println("\r[", color.RedString("✘"), "] Writing image,", written, "bytes written ")
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log.Fatal(err)
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} else {
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fmt.Println("\r[", color.GreenString("✓"), "] Writing image,", written, "bytes written ")
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}
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s.Prefix = "[ "
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s.Suffix = " ] Syncing"
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s.Start()
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err = image.Sync()
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Syncing ")
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log.Fatal(err)
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}
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err = target.Sync()
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Syncing ")
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log.Fatal(err)
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} else {
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s.Stop()
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fmt.Println("\r[", color.GreenString("✓"), "] Syncing ")
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}
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if !(force || disable_hash) {
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s.Prefix = "[ "
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s.Suffix = " ] Verifying"
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s.Start()
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posthash := sha256.New()
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_, err = io.CopyN(posthash, target, inputsize)
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presum := fmt.Sprintf("%x", prehash.Sum(nil))
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postsum := fmt.Sprintf("%x", posthash.Sum(nil))
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if err != nil || presum != postsum {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Verifying ")
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log.Fatal(err)
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} else {
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s.Stop()
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fmt.Println("\r[", color.GreenString("✓"), "] Verifying ")
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}
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}
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err = image.Close()
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if err != nil {
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log.Fatal(err)
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}
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err = target.Close()
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if err != nil {
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log.Fatal(err)
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}
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}
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@ -0,0 +1,11 @@
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package etcher
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type Blockdevice struct {
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Path string
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Size int
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Type string
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//ID string
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}
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// CheckHash checks if the given file has been properly applied to the given blockdevice.
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//func CheckHash(f os.File, b Blockdevice) error {}
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@ -0,0 +1,68 @@
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package etcher
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import (
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"fmt"
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"io"
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"os"
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"strconv"
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"strings"
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)
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// getBlockdeviceSize gets the size of a blockdevice from the kernel filesystem.
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func getBlockdeviceSize(name string) (size int, err error) {
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sizefile, err := os.Open("/sys/block/" + name + "/size")
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if err != nil {
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return
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}
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sizeread, err := io.ReadAll(sizefile)
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if err != nil {
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return
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}
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_ = sizefile.Close()
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sizestring := strings.TrimSuffix(string(sizeread), "\n")
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size, err = strconv.Atoi(sizestring)
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if err != nil {
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return
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}
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size = size * 512 // multiply blockcount by blocksize
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return size, err
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}
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// GetBlockdevices gets the available blockdevices for reading from/writing to.
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func GetBlockdevices() (devices []Blockdevice, err error) {
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block, err := os.ReadDir("/sys/block")
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if err != nil {
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return
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} else if len(block) == 0 {
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return devices, fmt.Errorf("no blockdevices found")
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}
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for _, device := range block {
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var dev Blockdevice
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dev.Path = "/dev/" + device.Name()
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if strings.Contains(device.Name(), "sd") {
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dev.Type = "sata"
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} else if strings.Contains(device.Name(), "hd") {
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dev.Type = "ide"
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} else if strings.Contains(device.Name(), "nvme") {
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dev.Type = "nvme"
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} else if strings.Contains(device.Name(), "dm") {
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dev.Type = "dmcrypt"
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} else if strings.Contains(device.Name(), "md") {
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dev.Type = "raid"
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}
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dev.Size, err = getBlockdeviceSize(device.Name())
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if err != nil {
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return
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}
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devices = append(devices, dev)
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}
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return devices, nil
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}
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301
main.go
301
main.go
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@ -1,302 +1,7 @@
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package main
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import (
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"crypto/sha256"
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"fmt"
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ac "github.com/JoaoDanielRufino/go-input-autocomplete"
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"github.com/briandowns/spinner"
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"github.com/fatih/color"
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"github.com/schollz/progressbar/v3"
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flag "github.com/spf13/pflag"
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"io"
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"log"
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"os"
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"runtime"
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"strconv"
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"strings"
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"time"
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)
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var device string
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var input string
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var force bool
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var disable_hash bool
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func init() {
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flag.StringVarP(&device, "device", "d", "", "target device")
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flag.StringVarP(&input, "input", "i", "", "input file")
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flag.BoolVarP(&force, "force", "f", false, "override safety features")
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flag.BoolVarP(&disable_hash, "no-hash", "n", false, "disable hash verification")
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flag.Parse()
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}
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func GetPath() string {
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path, err := ac.Read("[ " + color.YellowString("i") + " ] Please input your image file: ")
|
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if err != nil {
|
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log.Fatal(err)
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}
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path = strings.TrimSpace(path)
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if strings.HasPrefix(path, "~/") {
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homedir, err := os.UserHomeDir()
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if err != nil {
|
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log.Fatal(err)
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}
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return homedir + path[1:]
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}
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if path == "" {
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fmt.Println("[", color.RedString("!"), "] No image given, retrying.")
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path = GetPath()
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}
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return path
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}
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func GetDest() string {
|
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PrintAvail()
|
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dest, err := ac.Read("[ " + color.YellowString("i") + " ] Please input destination: ")
|
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if err != nil {
|
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log.Fatal(err)
|
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}
|
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dest = strings.TrimSpace(dest)
|
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if strings.HasPrefix(dest, "~/") {
|
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homedir, err := os.UserHomeDir()
|
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if err != nil {
|
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log.Fatal(err)
|
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}
|
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return homedir + dest[1:]
|
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}
|
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if dest == "" {
|
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fmt.Println("[", color.RedString("!"), "] No destination given, retrying.")
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dest = GetDest()
|
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}
|
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return dest
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}
|
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|
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func WriteImage(image *os.File, target *os.File, size int64) (int64, error) {
|
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bar := progressbar.NewOptions(int(size),
|
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progressbar.OptionSetWriter(os.Stderr),
|
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progressbar.OptionShowBytes(true),
|
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progressbar.OptionSetWidth(25),
|
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progressbar.OptionSetDescription("Writing image file..."),
|
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progressbar.OptionSetTheme(progressbar.Theme{
|
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Saucer: "=",
|
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SaucerHead: ">",
|
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SaucerPadding: " ",
|
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BarStart: "[",
|
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BarEnd: "]",
|
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}))
|
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writer := io.MultiWriter(target, bar)
|
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written, err := io.Copy(writer, image)
|
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if err != nil {
|
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return 0, err
|
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}
|
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return written, err
|
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}
|
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|
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func PrintAvail() {
|
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if runtime.GOOS == "linux" {
|
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block, _ := os.ReadDir("/sys/block")
|
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if len(block) == 0 {
|
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return
|
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}
|
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var targets []string
|
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for _, device := range block {
|
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if strings.HasPrefix(device.Name(), "sd") {
|
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targets = append(targets, device.Name())
|
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}
|
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if strings.HasPrefix(device.Name(), "nvme") {
|
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targets = append(targets, device.Name())
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}
|
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if strings.HasPrefix(device.Name(), "vd") {
|
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targets = append(targets, device.Name())
|
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}
|
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}
|
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fmt.Println("Available devices:")
|
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for _, target := range targets {
|
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sizefile, _ := os.Open("/sys/block/" + target + "/size")
|
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sizeread, _ := io.ReadAll(sizefile)
|
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_ = sizefile.Close()
|
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sizestring := strings.ReplaceAll(string(sizeread), "\n", "")
|
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size, _ := strconv.Atoi(sizestring)
|
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size = size * 512
|
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size = size / 1024 / 1024 / 1024
|
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|
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fmt.Print(" * ", "/dev/"+target)
|
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if size > 0 {
|
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fmt.Print(" [", size, "GB]\n")
|
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} else {
|
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fmt.Println("")
|
||||
}
|
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}
|
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}
|
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}
|
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import "github.com/byReqz/go-etcher/cmd/cetcher"
|
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|
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func main() {
|
||||
s := spinner.New(spinner.CharSets[14], 100*time.Millisecond)
|
||||
|
||||
if input == "" {
|
||||
if len(flag.Args()) == 0 {
|
||||
input = GetPath()
|
||||
} else if len(flag.Args()) > 0 {
|
||||
input = flag.Args()[0]
|
||||
}
|
||||
}
|
||||
|
||||
if device == "" {
|
||||
if len(flag.Args()) == 0 {
|
||||
device = GetDest()
|
||||
} else if len(flag.Args()) > 0 {
|
||||
if input == flag.Args()[0] && len(flag.Args()) > 1 {
|
||||
device = flag.Args()[1]
|
||||
} else if input != flag.Args()[0] && len(flag.Args()) > 0 {
|
||||
device = flag.Args()[0]
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
s.Prefix = "[ "
|
||||
s.Suffix = " ] Getting file details"
|
||||
s.Start()
|
||||
statinput, err := os.Stat(input)
|
||||
if err != nil {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
|
||||
log.Fatal(err)
|
||||
}
|
||||
statdevice, err := os.Stat(device)
|
||||
if err != nil {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
|
||||
log.Fatal(err)
|
||||
}
|
||||
image, err := os.Open(input)
|
||||
if err != nil {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
|
||||
log.Fatal(err)
|
||||
}
|
||||
var inputsize int64
|
||||
var inputisblock bool
|
||||
if statinput.Size() != 0 {
|
||||
inputsize = statinput.Size()
|
||||
inputisblock = false
|
||||
} else {
|
||||
inputsize, _ = image.Seek(0, io.SeekEnd)
|
||||
inputisblock = true
|
||||
_, _ = image.Seek(0, 0)
|
||||
}
|
||||
target, err := os.OpenFile(device, os.O_RDWR, 0660)
|
||||
if err != nil {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
|
||||
log.Fatal(err)
|
||||
}
|
||||
var targetsize int64
|
||||
var targetisblock bool
|
||||
if statdevice.Size() != 0 {
|
||||
targetsize = statdevice.Size()
|
||||
targetisblock = false
|
||||
} else {
|
||||
targetsize, err = target.Seek(0, io.SeekEnd)
|
||||
targetisblock = true
|
||||
_, _ = target.Seek(0, 0)
|
||||
}
|
||||
prehash := sha256.New()
|
||||
if !(force || disable_hash) {
|
||||
if err != nil {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
_, err = io.Copy(prehash, image)
|
||||
_, _ = image.Seek(0, 0)
|
||||
}
|
||||
if err != nil {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
|
||||
log.Fatal(err)
|
||||
} else {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.GreenString("✓"), "] Getting file details ")
|
||||
}
|
||||
inputmb := fmt.Sprint("[", inputsize/1024/1024, "MB]")
|
||||
devicemb := fmt.Sprint("[", targetsize/1024/1024, "MB]")
|
||||
var inputblock string
|
||||
var targetblock string
|
||||
if inputisblock {
|
||||
inputblock = "[Blockdevice]"
|
||||
} else {
|
||||
inputblock = "[File]"
|
||||
}
|
||||
if targetisblock {
|
||||
targetblock = "[Blockdevice]"
|
||||
} else {
|
||||
targetblock = "[File]"
|
||||
}
|
||||
fmt.Println("[", color.BlueString("i"), "] Input device/file: "+input, inputmb, inputblock)
|
||||
fmt.Println("[", color.BlueString("i"), "] Output device/file: "+device, devicemb, targetblock)
|
||||
if !force {
|
||||
if inputsize > targetsize {
|
||||
fmt.Println("[", color.RedString("w"), "]", color.RedString(" Warning:"), "Input file seems to be bigger than the destination!")
|
||||
}
|
||||
fmt.Print(color.HiWhiteString("Do you want to continue? [y/N]: "))
|
||||
var yesno string
|
||||
_, _ = fmt.Scanln(&yesno)
|
||||
yesno = strings.TrimSpace(yesno)
|
||||
if !(yesno == "y" || yesno == "Y") {
|
||||
log.Fatal("aborted")
|
||||
}
|
||||
}
|
||||
written, err := WriteImage(image, target, inputsize)
|
||||
_, _ = target.Seek(0, 0)
|
||||
if err != nil {
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Writing image,", written, "bytes written ")
|
||||
log.Fatal(err)
|
||||
} else {
|
||||
fmt.Println("\r[", color.GreenString("✓"), "] Writing image,", written, "bytes written ")
|
||||
}
|
||||
|
||||
s.Prefix = "[ "
|
||||
s.Suffix = " ] Syncing"
|
||||
s.Start()
|
||||
err = image.Sync()
|
||||
if err != nil {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Syncing ")
|
||||
log.Fatal(err)
|
||||
}
|
||||
err = target.Sync()
|
||||
if err != nil {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Syncing ")
|
||||
log.Fatal(err)
|
||||
} else {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.GreenString("✓"), "] Syncing ")
|
||||
}
|
||||
if !(force || disable_hash) {
|
||||
s.Prefix = "[ "
|
||||
s.Suffix = " ] Verifying"
|
||||
s.Start()
|
||||
posthash := sha256.New()
|
||||
_, err = io.CopyN(posthash, target, inputsize)
|
||||
presum := fmt.Sprintf("%x", prehash.Sum(nil))
|
||||
postsum := fmt.Sprintf("%x", posthash.Sum(nil))
|
||||
if err != nil || presum != postsum {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.RedString("✘"), "] Verifying ")
|
||||
log.Fatal(err)
|
||||
} else {
|
||||
s.Stop()
|
||||
fmt.Println("\r[", color.GreenString("✓"), "] Verifying ")
|
||||
}
|
||||
}
|
||||
err = image.Close()
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
err = target.Close()
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
cetcher.Main()
|
||||
}
|
||||
Loading…
Reference in New Issue