starting a shell

weed-fs/src/cmd/weed/shell.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+  "bufio"
+  "os"
+  "fmt"
+)
+
+func init() {
+  cmdShell.Run = runShell // break init cycle
+}
+
+var cmdShell = &Command{
+  UsageLine: "shell",
+  Short:     "run interactive commands, now just echo",
+  Long: `run interactive commands.
+
+  `,
+}
+
+var (
+)
+
+func runShell(command *Command, args []string) bool {
+  r := bufio.NewReader(os.Stdin)
+  o := bufio.NewWriter(os.Stdout)
+  e := bufio.NewWriter(os.Stderr)
+  prompt := func () { 
+    o.WriteString("> ")
+    o.Flush()
+  };
+  readLine := func () string { 
+    ret, err := r.ReadString('\n')
+    if err != nil { 
+       fmt.Fprint(e,err); 
+       os.Exit(1)
+    }
+    return ret
+  }
+  execCmd := func (cmd string) int { 
+    if cmd != "" { 
+      o.WriteString(cmd)
+    }
+    return 0
+  }
+
+  cmd := ""
+  for { 
+    prompt()
+    cmd = readLine()
+    execCmd(cmd)
+  } 
+  return true
+}