From d490a8570648f4d471db227f70d0408c7e84813d Mon Sep 17 00:00:00 2001
From: Christian Couder <chriscool@tuxfamily.org>
Date: Sat, 20 Dec 2014 16:39:37 +0100
Subject: [PATCH] Make sure ipfs add output is sorted by name

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
 core/commands/add.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/core/commands/add.go b/core/commands/add.go
index 176824a9f..3ab27ad8f 100644
--- a/core/commands/add.go
+++ b/core/commands/add.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"path"
+	"sort"
 
 	cmds "github.com/jbenet/go-ipfs/commands"
 	core "github.com/jbenet/go-ipfs/core"
@@ -82,6 +83,8 @@ remains to be implemented.
 				return nil, u.ErrCast()
 			}
 
+			sort.Stable(val)
+
 			var buf bytes.Buffer
 			for i, obj := range val.Objects {
 				if val.Quiet {
@@ -197,3 +200,16 @@ func addDagnode(output *AddOutput, name string, dn *dag.Node) error {
 	output.Names = append(output.Names, name)
 	return nil
 }
+
+// Sort interface implementation to sort add output by name
+
+func (a AddOutput) Len() int {
+    return len(a.Names)
+}
+func (a AddOutput) Swap(i, j int) {
+    a.Names[i], a.Names[j] = a.Names[j], a.Names[i]
+    a.Objects[i], a.Objects[j] = a.Objects[j], a.Objects[i]
+}
+func (a AddOutput) Less(i, j int) bool {
+    return a.Names[i] < a.Names[j]
+}