etcdctl: import from external repo

etcdctl/command/ls_command.go

@@ -0,0 +1,57 @@
+package command
+
+import (
+	"fmt"
+
+	"github.com/coreos/etcd/Godeps/_workspace/src/github.com/codegangsta/cli"
+	"github.com/coreos/etcd/Godeps/_workspace/src/github.com/coreos/go-etcd/etcd"
+)
+
+func NewLsCommand() cli.Command {
+	return cli.Command{
+		Name:  "ls",
+		Usage: "retrieve a directory",
+		Flags: []cli.Flag{
+			cli.BoolFlag{"recursive", "returns all values for key and child keys"},
+		},
+		Action: func(c *cli.Context) {
+			handleLs(c, lsCommandFunc)
+		},
+	}
+}
+
+// handleLs handles a request that intends to do ls-like operations.
+func handleLs(c *cli.Context, fn handlerFunc) {
+	handlePrint(c, fn, printLs)
+}
+
+// printLs writes a response out in a manner similar to the `ls` command in unix.
+// Non-empty directories list their contents and files list their name.
+func printLs(resp *etcd.Response, format string) {
+	if !resp.Node.Dir {
+		fmt.Println(resp.Node.Key)
+	}
+	for _, node := range resp.Node.Nodes {
+		rPrint(node)
+	}
+}
+
+// lsCommandFunc executes the "ls" command.
+func lsCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
+	key := "/"
+	if len(c.Args()) != 0 {
+		key = c.Args()[0]
+	}
+	recursive := c.Bool("recursive")
+
+	// Retrieve the value from the server.
+	return client.Get(key, false, recursive)
+}
+
+// rPrint recursively prints out the nodes in the node structure.
+func rPrint(n *etcd.Node) {
+	fmt.Println(n.Key)
+	for _, node := range n.Nodes {
+		rPrint(node)
+	}
+}