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

208 lines
5.5 KiB
Go

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package main
import (
"errors"
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"fmt"
"os"
"path/filepath"
"runtime"
"runtime/debug"
"sort"
"strings"
"time"
"github.com/urfave/cli/v2"
"go.uber.org/zap"
"github.com/unlock-music/cli/algo/common"
_ "github.com/unlock-music/cli/algo/kgm"
_ "github.com/unlock-music/cli/algo/kwm"
_ "github.com/unlock-music/cli/algo/ncm"
_ "github.com/unlock-music/cli/algo/qmc"
_ "github.com/unlock-music/cli/algo/tm"
_ "github.com/unlock-music/cli/algo/xm"
"github.com/unlock-music/cli/internal/logging"
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)
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var AppVersion = "v0.0.6"
var logger, _ = logging.NewZapLogger() // TODO: inject logger to application, instead of using global logger
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func main() {
module, ok := debug.ReadBuildInfo()
if ok && module.Main.Version != "(devel)" {
AppVersion = module.Main.Version
}
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app := cli.App{
Name: "Unlock Music CLI",
HelpName: "um",
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{
&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},
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},
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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()),
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HideHelpCommand: true,
UsageText: "um [-o /path/to/output/dir] [--extra-flags] [-i] /path/to/input",
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}
err := app.Run(os.Args)
if err != nil {
logger.Fatal("run app failed", zap.Error(err))
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}
}
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]))
}
}
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func appMain(c *cli.Context) (err error) {
if c.Bool("supported-ext") {
printSupportedExtensions()
return nil
}
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input := c.String("input")
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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)")
}
}
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output := c.String("output")
if output == "" {
var err error
output, err = os.Getwd()
if err != nil {
return err
}
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if input == output {
return errors.New("input and output path are same")
}
}
skipNoop := c.Bool("skip-noop")
removeSource := c.Bool("remove-source")
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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)
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} else {
allDec := common.GetDecoder(inputStat.Name(), skipNoop)
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if len(allDec) == 0 {
logger.Fatal("skipping while no suitable decoder")
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}
return tryDecFile(input, output, allDec, removeSource)
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}
}
func dealDirectory(inputDir string, outputDir string, skipNoop bool, removeSource bool) error {
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items, err := os.ReadDir(inputDir)
if err != nil {
return err
}
for _, item := range items {
if item.IsDir() {
continue
}
allDec := common.GetDecoder(item.Name(), skipNoop)
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if len(allDec) == 0 {
logger.Info("skipping while no suitable decoder", zap.String("file", item.Name()))
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continue
}
err := tryDecFile(filepath.Join(inputDir, item.Name()), outputDir, allDec, removeSource)
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if err != nil {
logger.Error("conversion failed", zap.String("source", item.Name()), zap.Error(err))
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}
}
return nil
}
func tryDecFile(inputFile string, outputDir string, allDec []common.NewDecoderFunc, removeSource bool) error {
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file, err := os.ReadFile(inputFile)
if err != nil {
return err
}
var dec common.Decoder
for _, decFunc := range allDec {
dec = decFunc(file)
if err := dec.Validate(); err == nil {
break
} else {
logger.Warn("try decode failed", zap.Error(err))
dec = nil
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}
}
if dec == nil {
return errors.New("no any decoder can resolve the file")
}
if err := dec.Decode(); err != nil {
return errors.New("failed while decoding: " + err.Error())
}
outData := dec.GetAudioData()
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outExt := dec.GetAudioExt()
if outExt == "" {
if ext, ok := common.SniffAll(outData); ok {
outExt = ext
} else {
outExt = ".mp3"
}
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}
filenameOnly := strings.TrimSuffix(filepath.Base(inputFile), filepath.Ext(inputFile))
outPath := filepath.Join(outputDir, filenameOnly+outExt)
err = os.WriteFile(outPath, outData, 0644)
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if err != nil {
return 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))
}
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return nil
}