core/commands/unixfs/ls: Explicitily record stat in LsObject

Instead of abusing a LsLink for non-directory objects [1].

[1]: https://github.com/ipfs/go-ipfs/pull/1348#discussion_r32680669

License: MIT
Signed-off-by: W. Trevor King <wking@tremily.us>

core/commands/unixfs/ls.go

@@ -24,6 +24,9 @@ type LsLink struct {
 }
 
 type LsObject struct {
+	Hash  string
+	Size  uint64
+	Type  string
 	Links []LsLink
 }
 
@@ -85,8 +88,6 @@ directories, the child size is the IPFS link size.
 				continue
 			}
 
-			output.Objects[hash] = &LsObject{}
-
 			unixFSNode, err := unixfs.FromBytes(merkleNode.Data)
 			if err != nil {
 				res.SetError(err, cmds.ErrNormal)
@@ -94,22 +95,19 @@ directories, the child size is the IPFS link size.
 			}
 
 			t := unixFSNode.GetType()
+
+			output.Objects[hash] = &LsObject{
+				Hash: key.String(),
+				Type: t.String(),
+				Size: unixFSNode.GetFilesize(),
+			}
+
 			switch t {
 			default:
 				res.SetError(fmt.Errorf("unrecognized type: %s", t), cmds.ErrImplementation)
 				return
 			case unixfspb.Data_File:
-				key, err := merkleNode.Key()
-				if err != nil {
-					res.SetError(err, cmds.ErrNormal)
-					return
-				}
-				output.Objects[hash].Links = []LsLink{LsLink{
-					Name: fpath,
-					Hash: key.String(),
-					Type: t.String(),
-					Size: unixFSNode.GetFilesize(),
-				}}
+				break
 			case unixfspb.Data_Directory:
 				links := make([]LsLink, len(merkleNode.Links))
 				output.Objects[hash].Links = links
@@ -159,10 +157,10 @@ directories, the child size is the IPFS link size.
 					return nil, fmt.Errorf("unresolved hash: %s", hash)
 				}
 
-				if len(object.Links) == 1 && object.Links[0].Hash == hash {
-					nonDirectories = append(nonDirectories, argument)
-				} else {
+				if object.Type == "Directory" {
 					directories = append(directories, argument)
+				} else {
+					nonDirectories = append(nonDirectories, argument)
 				}
 			}
 			sort.Strings(nonDirectories)

test/sharness/t0200-unixfs-ls.sh

@@ -114,14 +114,10 @@ test_ls_cmd() {
 			  },
 			  "Objects": {
 			    "QmbQBUSRL9raZtNXfpTDeaxQapibJEG6qEY8WqAN22aUzd": {
-			      "Links": [
-			        {
-			          "Name": "/ipfs/QmR3jhV4XpxxPjPT3Y8vNnWvWNvakdcT3H6vqpRBsX1MLy/1024",
-			          "Hash": "QmbQBUSRL9raZtNXfpTDeaxQapibJEG6qEY8WqAN22aUzd",
-			          "Size": 1024,
-			          "Type": "File"
-			        }
-			      ]
+			      "Hash": "QmbQBUSRL9raZtNXfpTDeaxQapibJEG6qEY8WqAN22aUzd",
+			      "Size": 1024,
+			      "Type": "File",
+			      "Links": null
 			    }
 			  }
 			}
@@ -145,6 +141,9 @@ test_ls_cmd() {
 			  },
 			  "Objects": {
 			    "QmSix55yz8CzWXf5ZVM9vgEvijnEeeXiTSarVtsqiiCJss": {
+			      "Hash": "QmSix55yz8CzWXf5ZVM9vgEvijnEeeXiTSarVtsqiiCJss",
+			      "Size": 0,
+			      "Type": "Directory",
 			      "Links": [
 			        {
 			          "Name": "128",
@@ -161,14 +160,10 @@ test_ls_cmd() {
 			      ]
 			    },
 			    "QmbQBUSRL9raZtNXfpTDeaxQapibJEG6qEY8WqAN22aUzd": {
-			      "Links": [
-			        {
-			          "Name": "/ipfs/QmR3jhV4XpxxPjPT3Y8vNnWvWNvakdcT3H6vqpRBsX1MLy/1024",
-			          "Hash": "QmbQBUSRL9raZtNXfpTDeaxQapibJEG6qEY8WqAN22aUzd",
-			          "Size": 1024,
-			          "Type": "File"
-			        }
-			      ]
+			      "Hash": "QmbQBUSRL9raZtNXfpTDeaxQapibJEG6qEY8WqAN22aUzd",
+			      "Size": 1024,
+			      "Type": "File",
+			      "Links": null
 			    }
 			  }
 			}