etcdctl: import from external repo

etcdctl/command/get_command.go

@@ -0,0 +1,60 @@
+package command
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/coreos/etcd/Godeps/_workspace/src/github.com/codegangsta/cli"
+	"github.com/coreos/etcd/Godeps/_workspace/src/github.com/coreos/go-etcd/etcd"
+)
+
+// NewGetCommand returns the CLI command for "get".
+func NewGetCommand() cli.Command {
+	return cli.Command{
+		Name:  "get",
+		Usage: "retrieve the value of a key",
+		Flags: []cli.Flag{
+			cli.BoolFlag{"sort", "returns result in sorted order"},
+			cli.BoolFlag{"consistent", "send request to the leader, thereby guranteeing that any earlier writes will be seen by the read"},
+		},
+		Action: func(c *cli.Context) {
+			handleGet(c, getCommandFunc)
+		},
+	}
+}
+
+// handleGet handles a request that intends to do get-like operations.
+func handleGet(c *cli.Context, fn handlerFunc) {
+	handlePrint(c, fn, printGet)
+}
+
+// printGet writes error message when getting the value of a directory.
+func printGet(resp *etcd.Response, format string) {
+	if resp.Node.Dir {
+		fmt.Fprintln(os.Stderr, fmt.Sprintf("%s: is a directory", resp.Node.Key))
+		os.Exit(1)
+	}
+
+	printKey(resp, format)
+}
+
+// getCommandFunc executes the "get" command.
+func getCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
+	if len(c.Args()) == 0 {
+		return nil, errors.New("Key required")
+	}
+	key := c.Args()[0]
+	consistent := c.Bool("consistent")
+	sorted := c.Bool("sort")
+
+	// Setup consistency on the client.
+	if consistent {
+		client.SetConsistency(etcd.STRONG_CONSISTENCY)
+	} else {
+		client.SetConsistency(etcd.WEAK_CONSISTENCY)
+	}
+
+	// Retrieve the value from the server.
+	return client.Get(key, sorted, false)
+}