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|
package main
import (
"fmt"
"io"
"os"
"path"
"strings"
)
var knownCommands = []string{
"ls",
"rm",
"mv",
"mkdir",
"touch",
"chmod",
"chown",
"cat",
"head",
"tail",
"du",
"checksum",
"get",
"getmerge",
"put",
"df",
}
func complete(args []string) {
if len(args) == 2 {
words := strings.Split(args[1], " ")[1:]
if len(words) <= 1 {
fmt.Println(strings.Join(knownCommands, " "))
} else if isKnownCommand(words[0]) {
position := countPosition(words)
completeArg(words[0], words[len(words)-1], position)
}
} else {
fmt.Println(strings.Join(knownCommands, " "))
}
}
func completeArg(command, fragment string, position int) {
if (command == "put" && position == 1) ||
((command == "get" || command == "getmerge") && position == 2) {
fmt.Println("_FILE_") // The bash_completion bit knows about this special string.
} else if (command == "chmod" || command == "chown") && position == 1 {
return
} else if !strings.HasPrefix(fragment, "-") {
completePath(fragment)
}
}
func completePath(fragment string) {
paths, namenode, err := normalizePaths([]string{fragment})
if err != nil {
return
}
client, err := getClient(namenode)
if err != nil {
return
}
fullPath := paths[0]
if fullPath == "" {
fullPath = userDir(client) + "/"
} else if hasGlob(fullPath) {
return
}
var dir, prefix string
if strings.HasSuffix(fragment, "/") {
dir = fullPath
prefix = ""
} else {
dir, prefix = path.Split(fullPath)
}
dirReader, err := client.Open(dir)
if err != nil {
return
}
// 1000 entries should align with what HDFS returns. If not, well, it was
// going to be slow anyway.
var partial []os.FileInfo
for ; err != io.EOF; partial, err = dirReader.Readdir(1000) {
if err != nil {
return
}
for _, fi := range partial {
name := fi.Name()
if strings.HasPrefix(name, prefix) {
p := path.Join(dir, name)
if fi.IsDir() {
p += "/"
}
fmt.Print(" " + p)
}
}
}
fmt.Println()
}
func isKnownCommand(command string) bool {
for _, c := range knownCommands {
if command == c {
return true
}
}
return false
}
func countPosition(words []string) int {
var position int
for _, w := range words {
if !strings.HasPrefix(w, "-") {
position++
}
}
return position - 1
}
|
