core/commands2: Added 'ls' command

core/commands2/ls.go

+package commands
+
+import (
+	"fmt"
+
+	cmds "github.com/jbenet/go-ipfs/commands"
+)
+
+type Link struct {
+	Name, Hash string
+	Size       uint64
+}
+
+var ls = &cmds.Command{
+	Help: "TODO",
+	Run: func(res cmds.Response, req cmds.Request) {
+		node := req.Context().Node
+		output := make(map[string][]Link, len(req.Arguments()))
+
+		for _, path := range req.Arguments() {
+			dagnode, err := node.Resolver.ResolvePath(path)
+			if err != nil {
+				res.SetError(err, cmds.ErrNormal)
+				return
+			}
+
+			output[path] = make([]Link, len(dagnode.Links))
+			for i, link := range dagnode.Links {
+				output[path][i] = Link{
+					Name: link.Name,
+					Hash: link.Hash.B58String(),
+					Size: link.Size,
+				}
+			}
+		}
+
+		res.SetValue(output)
+	},
+	Format: func(res cmds.Response) (string, error) {
+		s := ""
+		output := res.Value().(*map[string][]Link)
+
+		for path, links := range *output {
+			if len(*output) > 1 {
+				s += fmt.Sprintf("%s:\n", path)
+			}
+
+			for _, link := range links {
+				s += fmt.Sprintf("-> %s %s (%v bytes)\n", link.Name, link.Hash, link.Size)
+			}
+
+			if len(*output) > 1 {
+				s += "\n"
+			}
+		}
+
+		return s, nil
+	},
+	Type: &map[string][]Link{},
+}

core/commands2/root.go

@@ -52,6 +52,7 @@ Use "ipfs help <command>" for more information about a command.
 `,
 	Subcommands: map[string]*cmds.Command{
 		"cat": cat,
+		"ls":  ls,
 
 		// test subcommands
 		// TODO: remove these when we don't need them anymore