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package main
import (
"fmt"
"io"
"os"
"path"
"strconv"
"strings"
"text/tabwriter"
"time"
"github.com/colinmarc/hdfs/v2"
)
func ls(paths []string, long, all, humanReadable bool) {
paths, client, err := getClientAndExpandedPaths(paths)
if err != nil {
fatal(err)
}
if len(paths) == 0 {
paths = []string{userDir(client)}
}
files := make([]string, 0, len(paths))
fileInfos := make([]os.FileInfo, 0, len(paths))
dirs := make([]string, 0, len(paths))
for _, p := range paths {
fi, err := client.Stat(p)
if err != nil {
fatal(err)
}
if fi.IsDir() {
dirs = append(dirs, p)
} else {
files = append(files, p)
fileInfos = append(fileInfos, fi)
}
}
if len(files) == 0 && len(dirs) == 1 {
printDir(client, dirs[0], long, all, humanReadable)
} else {
if long {
tw := lsTabWriter()
for i, p := range files {
printLong(tw, p, fileInfos[i], humanReadable)
}
tw.Flush()
} else {
for _, p := range files {
fmt.Println(p)
}
}
for i, dir := range dirs {
if i > 0 || len(files) > 0 {
fmt.Println()
}
fmt.Printf("%s/:\n", dir)
printDir(client, dir, long, all, humanReadable)
}
}
}
func printDir(client *hdfs.Client, dir string, long, all, humanReadable bool) {
dirReader, err := client.Open(dir)
if err != nil {
fatal(err)
}
var tw *tabwriter.Writer
if long {
tw = lsTabWriter()
defer tw.Flush()
}
if all {
if long {
dirInfo, err := client.Stat(dir)
if err != nil {
fatal(err)
}
parentPath := path.Join(dir, "..")
parentInfo, err := client.Stat(parentPath)
if err != nil {
fatal(err)
}
printLong(tw, ".", dirInfo, humanReadable)
printLong(tw, "..", parentInfo, humanReadable)
} else {
fmt.Println(".")
fmt.Println("..")
}
}
var partial []os.FileInfo
for ; err != io.EOF; partial, err = dirReader.Readdir(100) {
if err != nil {
fatal(err)
}
printFiles(tw, partial, long, all, humanReadable)
}
if long {
tw.Flush()
}
}
func printFiles(tw *tabwriter.Writer, files []os.FileInfo, long, all, humanReadable bool) {
for _, file := range files {
if !all && strings.HasPrefix(file.Name(), ".") {
continue
}
if long {
printLong(tw, file.Name(), file, humanReadable)
} else {
fmt.Println(file.Name())
}
}
}
func printLong(tw *tabwriter.Writer, name string, info os.FileInfo, humanReadable bool) {
fi := info.(*hdfs.FileInfo)
// mode owner group size date(\w tab) time/year name
mode := fi.Mode().String()
owner := fi.Owner()
group := fi.OwnerGroup()
size := strconv.FormatInt(fi.Size(), 10)
if humanReadable {
size = formatBytes(uint64(fi.Size()))
}
modtime := fi.ModTime()
date := modtime.Format("Jan _2")
var timeOrYear string
if modtime.Year() == time.Now().Year() {
timeOrYear = modtime.Format("15:04")
} else {
timeOrYear = modtime.Format("2006")
}
fmt.Fprintf(tw, "%s \t%s \t %s \t %s \t%s \t%s \t%s\n",
mode, owner, group, size, date, timeOrYear, name)
}
func lsTabWriter() *tabwriter.Writer {
return tabwriter.NewWriter(os.Stdout, 3, 8, 0, ' ', tabwriter.AlignRight|tabwriter.TabIndent)
}
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