260 lines
6.9 KiB
Go
260 lines
6.9 KiB
Go
package main
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"runtime"
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"runtime/debug"
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"sort"
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"strings"
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"time"
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"github.com/urfave/cli/v2"
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"go.uber.org/zap"
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"unlock-music.dev/cli/algo/common"
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_ "unlock-music.dev/cli/algo/kgm"
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_ "unlock-music.dev/cli/algo/kwm"
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_ "unlock-music.dev/cli/algo/ncm"
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_ "unlock-music.dev/cli/algo/qmc"
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_ "unlock-music.dev/cli/algo/tm"
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_ "unlock-music.dev/cli/algo/xiami"
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_ "unlock-music.dev/cli/algo/ximalaya"
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"unlock-music.dev/cli/internal/logging"
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"unlock-music.dev/cli/internal/sniff"
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)
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var AppVersion = "v0.0.6"
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var logger, _ = logging.NewZapLogger() // TODO: inject logger to application, instead of using global logger
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func main() {
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module, ok := debug.ReadBuildInfo()
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if ok && module.Main.Version != "(devel)" {
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AppVersion = module.Main.Version
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}
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app := cli.App{
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Name: "Unlock Music CLI",
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HelpName: "um",
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Usage: "Unlock your encrypted music file https://git.unlock-music.dev/um/cli",
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Version: fmt.Sprintf("%s (%s,%s/%s)", AppVersion, runtime.Version(), runtime.GOOS, runtime.GOARCH),
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Flags: []cli.Flag{
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&cli.StringFlag{Name: "input", Aliases: []string{"i"}, Usage: "path to input file or dir", Required: false},
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&cli.StringFlag{Name: "output", Aliases: []string{"o"}, Usage: "path to output dir", Required: false},
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&cli.BoolFlag{Name: "remove-source", Aliases: []string{"rs"}, Usage: "remove source file", Required: false, Value: false},
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&cli.BoolFlag{Name: "skip-noop", Aliases: []string{"n"}, Usage: "skip noop decoder", Required: false, Value: true},
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&cli.BoolFlag{Name: "supported-ext", Usage: "Show supported file extensions and exit", Required: false, Value: false},
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},
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Action: appMain,
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Copyright: fmt.Sprintf("Copyright (c) 2020 - %d Unlock Music https://git.unlock-music.dev/um/cli/src/branch/master/LICENSE", time.Now().Year()),
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HideHelpCommand: true,
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UsageText: "um [-o /path/to/output/dir] [--extra-flags] [-i] /path/to/input",
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}
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err := app.Run(os.Args)
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if err != nil {
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logger.Fatal("run app failed", zap.Error(err))
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}
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}
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func printSupportedExtensions() {
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var exts []string
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for ext := range common.DecoderRegistry {
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exts = append(exts, ext)
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}
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sort.Strings(exts)
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for _, ext := range exts {
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fmt.Printf("%s: %d\n", ext, len(common.DecoderRegistry[ext]))
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}
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}
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func appMain(c *cli.Context) (err error) {
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if c.Bool("supported-ext") {
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printSupportedExtensions()
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return nil
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}
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input := c.String("input")
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if input == "" {
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switch c.Args().Len() {
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case 0:
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input, err = os.Getwd()
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if err != nil {
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return err
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}
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case 1:
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input = c.Args().Get(0)
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default:
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return errors.New("please specify input file (or directory)")
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}
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}
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output := c.String("output")
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if output == "" {
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var err error
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output, err = os.Getwd()
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if err != nil {
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return err
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}
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if input == output {
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return errors.New("input and output path are same")
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}
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}
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skipNoop := c.Bool("skip-noop")
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removeSource := c.Bool("remove-source")
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inputStat, err := os.Stat(input)
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if err != nil {
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return err
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}
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outputStat, err := os.Stat(output)
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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err = os.MkdirAll(output, 0755)
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}
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if err != nil {
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return err
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}
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} else if !outputStat.IsDir() {
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return errors.New("output should be a writable directory")
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}
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if inputStat.IsDir() {
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return dealDirectory(input, output, skipNoop, removeSource)
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} else {
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allDec := common.GetDecoder(inputStat.Name(), skipNoop)
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if len(allDec) == 0 {
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logger.Fatal("skipping while no suitable decoder")
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}
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return tryDecFile(input, output, allDec, removeSource)
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}
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}
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func dealDirectory(inputDir string, outputDir string, skipNoop bool, removeSource bool) error {
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items, err := os.ReadDir(inputDir)
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if err != nil {
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return err
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}
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for _, item := range items {
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if item.IsDir() {
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continue
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}
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allDec := common.GetDecoder(item.Name(), skipNoop)
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if len(allDec) == 0 {
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logger.Info("skipping while no suitable decoder", zap.String("file", item.Name()))
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continue
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}
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filePath := filepath.Join(inputDir, item.Name())
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err := tryDecFile(filePath, outputDir, allDec, removeSource)
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if err != nil {
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logger.Error("conversion failed", zap.String("source", filePath), zap.Error(err))
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}
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}
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return nil
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}
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func tryDecFile(inputFile string, outputDir string, allDec []common.NewDecoderFunc, removeSource bool) error {
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file, err := os.Open(inputFile)
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if err != nil {
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return err
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}
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defer file.Close()
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logger := logger.With(zap.String("source", inputFile))
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decParams := &common.DecoderParams{
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Reader: file,
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Extension: filepath.Ext(inputFile),
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FilePath: inputFile,
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Logger: logger,
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}
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var dec common.Decoder
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for _, decFunc := range allDec {
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dec = decFunc(decParams)
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if err := dec.Validate(); err == nil {
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break
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} else {
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logger.Warn("try decode failed", zap.Error(err))
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dec = nil
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}
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}
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if dec == nil {
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return errors.New("no any decoder can resolve the file")
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}
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header := bytes.NewBuffer(nil)
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_, err = io.CopyN(header, dec, 64)
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if err != nil {
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return fmt.Errorf("read header failed: %w", err)
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}
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outExt := sniff.AudioExtensionWithFallback(header.Bytes(), ".mp3")
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inFilename := strings.TrimSuffix(filepath.Base(inputFile), filepath.Ext(inputFile))
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outPath := filepath.Join(outputDir, inFilename+outExt)
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outFile, err := os.OpenFile(outPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
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if err != nil {
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return err
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}
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defer outFile.Close()
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if _, err := io.Copy(outFile, header); err != nil {
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return err
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}
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if _, err := io.Copy(outFile, dec); err != nil {
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return err
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}
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if audioMetaGetter, ok := dec.(common.AudioMetaGetter); ok {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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meta, err := audioMetaGetter.GetAudioMeta(ctx)
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if err != nil {
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logger.Warn("get audio meta failed", zap.Error(err))
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} else {
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logger.Info("audio metadata",
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zap.String("title", meta.GetTitle()),
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zap.Strings("artists", meta.GetArtists()),
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zap.String("album", meta.GetAlbum()),
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)
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}
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}
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if coverGetter, ok := dec.(common.CoverImageGetter); ok {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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cover, err := coverGetter.GetCoverImage(ctx)
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if err != nil {
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logger.Warn("get cover image failed", zap.Error(err))
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} else if imgExt, ok := sniff.ImageExtension(cover); !ok {
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logger.Warn("sniff cover image type failed", zap.Error(err))
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} else {
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coverPath := filepath.Join(outputDir, inFilename+imgExt)
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err = os.WriteFile(coverPath, cover, 0644)
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if err != nil {
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logger.Warn("write cover image failed", zap.Error(err))
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}
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}
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}
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// if source file need to be removed
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if removeSource {
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err := os.RemoveAll(inputFile)
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if err != nil {
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return err
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}
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logger.Info("successfully converted, and source file is removed", zap.String("source", inputFile), zap.String("destination", outPath))
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} else {
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logger.Info("successfully converted", zap.String("source", inputFile), zap.String("destination", outPath))
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}
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return nil
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}
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