mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-08-22 09:40:45 +02:00
152 lines
2.8 KiB
Go
152 lines
2.8 KiB
Go
package shell
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import (
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"fmt"
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"io"
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"os"
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"path"
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"regexp"
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"sort"
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"strings"
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"github.com/peterh/liner"
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)
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var (
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line *liner.State
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historyPath = path.Join(os.TempDir(), "weed-shell")
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)
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func RunShell(options ShellOptions) {
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sort.Slice(Commands, func(i, j int) bool {
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return strings.Compare(Commands[i].Name(), Commands[j].Name()) < 0
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})
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line = liner.NewLiner()
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defer line.Close()
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line.SetCtrlCAborts(true)
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setCompletionHandler()
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loadHistory()
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defer saveHistory()
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reg, _ := regexp.Compile(`'.*?'|".*?"|\S+`)
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commandEnv := NewCommandEnv(options)
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go commandEnv.MasterClient.KeepConnectedToMaster()
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commandEnv.MasterClient.WaitUntilConnected()
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for {
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cmd, err := line.Prompt("> ")
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if err != nil {
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if err != io.EOF {
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fmt.Printf("%v\n", err)
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}
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return
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}
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for _, c := range strings.Split(cmd, ";") {
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if processEachCmd(reg, c, commandEnv) {
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return
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}
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}
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}
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}
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func processEachCmd(reg *regexp.Regexp, cmd string, commandEnv *CommandEnv) bool {
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cmds := reg.FindAllString(cmd, -1)
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if len(cmds) == 0 {
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return false
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} else {
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line.AppendHistory(cmd)
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args := make([]string, len(cmds[1:]))
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for i := range args {
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args[i] = strings.Trim(string(cmds[1+i]), "\"'")
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}
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cmd := cmds[0]
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if cmd == "help" || cmd == "?" {
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printHelp(cmds)
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} else if cmd == "exit" || cmd == "quit" {
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return true
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} else {
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foundCommand := false
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for _, c := range Commands {
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if c.Name() == cmd || c.Name() == "fs."+cmd {
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if err := c.Do(args, commandEnv, os.Stdout); err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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}
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foundCommand = true
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}
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}
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if !foundCommand {
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fmt.Fprintf(os.Stderr, "unknown command: %v\n", cmd)
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}
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}
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}
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return false
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}
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func printGenericHelp() {
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msg :=
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`Type: "help <command>" for help on <command>. Most commands support "<command> -h" also for options.
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`
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fmt.Print(msg)
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for _, c := range Commands {
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helpTexts := strings.SplitN(c.Help(), "\n", 2)
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fmt.Printf(" %-30s\t# %s \n", c.Name(), helpTexts[0])
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}
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}
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func printHelp(cmds []string) {
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args := cmds[1:]
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if len(args) == 0 {
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printGenericHelp()
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} else if len(args) > 1 {
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fmt.Println()
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} else {
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cmd := strings.ToLower(args[0])
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for _, c := range Commands {
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if c.Name() == cmd {
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fmt.Printf(" %s\t# %s\n", c.Name(), c.Help())
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}
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}
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}
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}
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func setCompletionHandler() {
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line.SetCompleter(func(line string) (c []string) {
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for _, i := range Commands {
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if strings.HasPrefix(i.Name(), strings.ToLower(line)) {
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c = append(c, i.Name())
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}
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}
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return
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})
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}
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func loadHistory() {
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if f, err := os.Open(historyPath); err == nil {
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line.ReadHistory(f)
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f.Close()
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}
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}
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func saveHistory() {
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if f, err := os.Create(historyPath); err != nil {
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fmt.Printf("Error writing history file: %v\n", err)
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} else {
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line.WriteHistory(f)
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f.Close()
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}
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}
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