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package cmd |
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import ( |
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"fmt" |
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"github.com/spf13/cobra" |
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"github.com/vvval/go-metadata-scanner/cmd/scancmd" |
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"github.com/vvval/go-metadata-scanner/cmd/scancmd/writers" |
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"github.com/vvval/go-metadata-scanner/config" |
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"github.com/vvval/go-metadata-scanner/etool" |
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"github.com/vvval/go-metadata-scanner/util" |
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"github.com/vvval/go-metadata-scanner/util/log" |
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"github.com/vvval/go-metadata-scanner/util/rand" |
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"github.com/vvval/go-metadata-scanner/util/scan" |
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"github.com/vvval/go-metadata-scanner/vars" |
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"os" |
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"path/filepath" |
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"sync" |
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) |
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var ( |
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scanFlags scancmd.Flags |
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PoolSize = 10 |
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MinChunkSize = 5 |
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) |
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func init() { |
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// cmd represents the scan command |
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var cmd = &cobra.Command{ |
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Use: "scan", |
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Short: "Scan folder and write metadata into the output file.", |
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Long: `Scan folder and write metadata into the output file. |
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By default output file is a "csv" file.`, |
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Run: scanHandler, |
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} |
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rootCmd.AddCommand(cmd) |
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scanFlags.Fill(cmd) |
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} |
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func scanHandler(cmd *cobra.Command, args []string) { |
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log.Log("Scanning", util.Abs(scanFlags.Directory())) |
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var files = scan.MustDir(scanFlags.Directory(), config.App.Extensions()) |
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poolSize, chunkSize := util.AdjustSizes(len(files), PoolSize, MinChunkSize) |
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var chunks = make(chan vars.Chunk) |
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var scannedFiles = make(chan vars.File) |
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var wg sync.WaitGroup |
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scancmd.CreatePool( |
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&wg, |
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poolSize, |
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chunks, |
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func(files vars.Chunk) ([]byte, error) { |
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return etool.Read(files, config.App.Fields()) |
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}, |
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func(data []byte) { |
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for _, parsed := range etool.Parse(data) { |
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scannedFiles <- parsed |
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} |
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}, |
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) |
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for _, chunk := range files.Split(chunkSize) { |
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wg.Add(1) |
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chunks <- chunk |
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} |
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go func() { |
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wg.Wait() |
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close(chunks) |
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close(scannedFiles) |
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}() |
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outputFilename := randomizeOutputFilename(scanFlags.Filename()) |
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headers := packHeaders(config.App.Fields()) |
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wr, err := writers.Get(scanFlags.Format()) |
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if err != nil { |
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logWriterFatal(err) |
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} |
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err = wr.Open(outputFilename, headers) |
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if err != nil { |
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logWriterFatal(err) |
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} |
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defer wr.Close() |
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for file := range scannedFiles { |
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file.WithRelPath(scanFlags.Directory()) |
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err := wr.Write(&file) |
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if err != nil { |
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log.Failure("CSV write", fmt.Sprintf("failed writing data for \"%s\" file", file.RelPath())) |
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} |
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} |
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log.Log("Scanned", fmt.Sprintf("Scan results are in the \"%s\" file", outputFilename)) |
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} |
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func randomizeOutputFilename(path string) string { |
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ext := filepath.Ext(path) |
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dir := filepath.Dir(path) |
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base := filepath.Base(path) |
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hash := rand.Strings(10) |
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return filepath.Join(dir, base[0:len(base)-len(ext)]+"-"+hash+ext) |
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} |
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func packHeaders(fields []string) []string { |
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headers := []string{"filename"} |
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111
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for _, field := range fields { |
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headers = append(headers, field) |
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} |
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return headers |
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} |
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func logWriterFatal(err error) { |
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log.Failure("Output writer", err.Error()) |
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os.Exit(1) |
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} |
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vvval /
go-metadata-scanner
