mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
148 lines
3.2 KiB
Go
148 lines
3.2 KiB
Go
package shell
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import (
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"context"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/filer2"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"io"
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"strings"
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)
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func init() {
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commands = append(commands, &commandFsTree{})
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}
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type commandFsTree struct {
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}
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func (c *commandFsTree) Name() string {
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return "fs.tree"
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}
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func (c *commandFsTree) Help() string {
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return `recursively list all files under a directory
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fs.tree http://<filer_server>:<port>/dir/
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`
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}
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func (c *commandFsTree) Do(args []string, commandEnv *commandEnv, writer io.Writer) (err error) {
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filerServer, filerPort, path, err := commandEnv.parseUrl(findInputDirectory(args))
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if err != nil {
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return err
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}
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dir, name := filer2.FullPath(path).DirAndName()
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ctx := context.Background()
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return commandEnv.withFilerClient(ctx, filerServer, filerPort, func(client filer_pb.SeaweedFilerClient) error {
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dirCount, fCount, terr := treeTraverseDirectory(ctx, writer, client, dir, name, newPrefix(), -1)
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if terr == nil {
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fmt.Fprintf(writer, "%d directories, %d files\n", dirCount, fCount)
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}
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return terr
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})
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}
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func treeTraverseDirectory(ctx context.Context, writer io.Writer, client filer_pb.SeaweedFilerClient, dir, name string, prefix *Prefix, level int) (directoryCount, fileCount int64, err error) {
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paginatedCount := -1
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startFromFileName := ""
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paginateSize := 1000
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for paginatedCount == -1 || paginatedCount == paginateSize {
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resp, listErr := client.ListEntries(ctx, &filer_pb.ListEntriesRequest{
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Directory: dir,
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Prefix: name,
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StartFromFileName: startFromFileName,
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InclusiveStartFrom: false,
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Limit: uint32(paginateSize),
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})
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if listErr != nil {
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err = listErr
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return
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}
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paginatedCount = len(resp.Entries)
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if paginatedCount > 0 {
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prefix.addMarker(level)
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}
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for i, entry := range resp.Entries {
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if level < 0 {
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if entry.Name != name {
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break
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}
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}
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// 0.1% wrong prefix here, but fixing it would need to paginate to the next batch first
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isLast := paginatedCount < paginateSize && i == paginatedCount-1
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fmt.Fprintf(writer, "%s%s\n", prefix.getPrefix(level, isLast), entry.Name)
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if entry.IsDirectory {
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directoryCount++
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subDir := fmt.Sprintf("%s/%s", dir, entry.Name)
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if dir == "/" {
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subDir = "/" + entry.Name
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}
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dirCount, fCount, terr := treeTraverseDirectory(ctx, writer, client, subDir, "", prefix, level+1)
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directoryCount += dirCount
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fileCount += fCount
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err = terr
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} else {
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fileCount++
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}
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startFromFileName = entry.Name
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}
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}
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return
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}
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type Prefix struct {
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markers map[int]bool
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}
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func newPrefix() *Prefix {
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return &Prefix{
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markers: make(map[int]bool),
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}
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}
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func (p *Prefix) addMarker(marker int) {
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p.markers[marker] = true
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}
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func (p *Prefix) removeMarker(marker int) {
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delete(p.markers, marker)
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}
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func (p *Prefix) getPrefix(level int, isLastChild bool) string {
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var sb strings.Builder
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if level < 0 {
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return ""
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}
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for i := 0; i < level; i++ {
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if _, ok := p.markers[i]; ok {
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sb.WriteString("│")
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} else {
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sb.WriteString(" ")
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}
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sb.WriteString(" ")
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}
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if isLastChild {
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sb.WriteString("└──")
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p.removeMarker(level)
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} else {
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sb.WriteString("├──")
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}
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return sb.String()
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}
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