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unlock-music-cli/cmd/um/main.go

259 lines
6.9 KiB
Go

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