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403 lines
11 KiB
Go
403 lines
11 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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"os/signal"
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"path"
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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/fsnotify/fsnotify"
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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/ffmpeg"
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"unlock-music.dev/cli/internal/logging"
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"unlock-music.dev/cli/internal/sniff"
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"unlock-music.dev/cli/internal/utils"
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)
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var AppVersion = "v0.2.3"
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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.StringFlag{Name: "qmc-mmkv", Aliases: []string{"db"}, Usage: "path to qmc mmkv (.crc file also required)", Required: false},
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&cli.StringFlag{Name: "qmc-mmkv-key", Aliases: []string{"key"}, Usage: "mmkv password (16 ascii chars)", 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: "update-metadata", Usage: "update metadata & album art from network", Required: false, Value: false},
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&cli.BoolFlag{Name: "overwrite", Usage: "overwrite output file without asking", Required: false, Value: false},
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&cli.BoolFlag{Name: "watch", Usage: "watch the input dir and process new files", Required: false, Value: false},
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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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cwd, 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 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 = cwd
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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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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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if output == "" {
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// Default to where the input is
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if inputStat.IsDir() {
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output = input
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} else {
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output = path.Dir(input)
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}
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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 mmkv := c.String("qmc-mmkv"); mmkv != "" {
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// If key is not set, the mmkv vault will be treated as unencrypted.
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key := c.String("qmc-mmkv-key")
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err := qmc.OpenMMKV(mmkv, key, logger)
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if err != nil {
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return err
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}
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}
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proc := &processor{
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inputDir: input,
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outputDir: output,
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skipNoopDecoder: c.Bool("skip-noop"),
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removeSource: c.Bool("remove-source"),
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updateMetadata: c.Bool("update-metadata"),
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overwriteOutput: c.Bool("overwrite"),
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}
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if inputStat.IsDir() {
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watchDir := c.Bool("watch")
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if !watchDir {
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return proc.processDir(input)
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} else {
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return proc.watchDir(input)
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}
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} else {
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return proc.processFile(input)
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}
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}
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type processor struct {
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inputDir string
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outputDir string
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skipNoopDecoder bool
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removeSource bool
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updateMetadata bool
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overwriteOutput bool
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}
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func (p *processor) watchDir(inputDir string) error {
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if err := p.processDir(inputDir); err != nil {
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return err
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}
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watcher, err := fsnotify.NewWatcher()
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if err != nil {
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return fmt.Errorf("failed to create watcher: %w", err)
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}
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defer watcher.Close()
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go func() {
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for {
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select {
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case event, ok := <-watcher.Events:
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if !ok {
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return
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}
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if event.Has(fsnotify.Create) || event.Has(fsnotify.Write) {
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// try open with exclusive mode, to avoid file is still writing
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f, err := os.OpenFile(event.Name, os.O_RDONLY, os.ModeExclusive)
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if err != nil {
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logger.Debug("failed to open file exclusively", zap.String("path", event.Name), zap.Error(err))
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time.Sleep(1 * time.Second) // wait for file writing complete
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continue
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}
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_ = f.Close()
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if err := p.processFile(event.Name); err != nil {
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logger.Warn("failed to process file", zap.String("path", event.Name), zap.Error(err))
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}
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}
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case err, ok := <-watcher.Errors:
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if !ok {
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return
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}
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logger.Error("file watcher got error", zap.Error(err))
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}
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}
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}()
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err = watcher.Add(inputDir)
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if err != nil {
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return fmt.Errorf("failed to watch dir %s: %w", inputDir, err)
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}
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signalCtx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
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defer stop()
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<-signalCtx.Done()
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return nil
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}
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func (p *processor) processDir(inputDir string) 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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var lastError error = nil
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for _, item := range items {
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filePath := filepath.Join(inputDir, item.Name())
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if item.IsDir() {
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if err = p.processDir(filePath); err != nil {
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lastError = err
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}
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continue
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}
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if err := p.processFile(filePath); err != nil {
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lastError = err
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logger.Error("conversion failed", zap.String("source", item.Name()), zap.Error(err))
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}
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}
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if lastError != nil {
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return fmt.Errorf("last error: %w", lastError)
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}
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return nil
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}
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func (p *processor) processFile(filePath string) error {
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allDec := common.GetDecoder(filePath, p.skipNoopDecoder)
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if len(allDec) == 0 {
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return errors.New("skipping while no suitable decoder")
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}
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if err := p.process(filePath, allDec); err != nil {
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return err
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}
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// if source file need to be removed
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if p.removeSource {
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err := os.RemoveAll(filePath)
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if err != nil {
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return err
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}
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logger.Info("source file removed after success conversion", zap.String("source", filePath))
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}
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return nil
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}
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func (p *processor) process(inputFile string, allDec []common.NewDecoderFunc) 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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params := &ffmpeg.UpdateMetadataParams{}
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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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audio := io.MultiReader(header, dec)
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params.AudioExt = sniff.AudioExtensionWithFallback(header.Bytes(), ".mp3")
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if p.updateMetadata {
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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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// since ffmpeg doesn't support multiple input streams,
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// we need to write the audio to a temp file.
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// since qmc decoder doesn't support seeking & relying on ffmpeg probe, we need to read the whole file.
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// TODO: support seeking or using pipe for qmc decoder.
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params.Audio, err = utils.WriteTempFile(audio, params.AudioExt)
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if err != nil {
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return fmt.Errorf("updateAudioMeta write temp file: %w", err)
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}
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defer os.Remove(params.Audio)
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params.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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}
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if params.Meta == nil { // reset audio meta if failed
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audio, err = os.Open(params.Audio)
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if err != nil {
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return fmt.Errorf("updateAudioMeta open temp file: %w", err)
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}
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}
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}
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}
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if p.updateMetadata && params.Meta != nil {
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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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if cover, err := coverGetter.GetCoverImage(ctx); 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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params.AlbumArtExt = imgExt
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params.AlbumArt = cover
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}
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}
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}
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inputRelDir, err := filepath.Rel(p.inputDir, filepath.Dir(inputFile))
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if err != nil {
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return fmt.Errorf("get relative dir failed: %w", err)
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}
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inFilename := strings.TrimSuffix(filepath.Base(inputFile), filepath.Ext(inputFile))
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outPath := filepath.Join(p.outputDir, inputRelDir, inFilename+params.AudioExt)
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if !p.overwriteOutput {
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_, err := os.Stat(outPath)
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if err == nil {
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logger.Warn("output file already exist, skip", zap.String("destination", outPath))
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return nil
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} else if !errors.Is(err, os.ErrNotExist) {
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return fmt.Errorf("stat output file failed: %w", err)
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}
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}
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if params.Meta == nil {
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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, audio); err != nil {
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return err
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}
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} else {
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ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
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defer cancel()
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if err := ffmpeg.UpdateMeta(ctx, outPath, params); err != nil {
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return err
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}
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}
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logger.Info("successfully converted", zap.String("source", inputFile), zap.String("destination", outPath))
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return nil
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}
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