Sort mountpoints.

License: MIT
Signed-off-by: Kevin Atkinson <k@kevina.org>

repo/fsrepo/config_test.go

@@ -10,6 +10,8 @@ import (
 	config "github.com/ipfs/go-ipfs/repo/config"
 )
 
+// note: to test sorting of the mountpoints in the disk spec they are
+// specified out of order in the test config
 var defaultConfig = []byte(`{
     "StorageMax": "10GB",
     "StorageGCWatermark": 90,
@@ -18,6 +20,16 @@ var defaultConfig = []byte(`{
       "mounts": [
         {
           "child": {
+            "compression": "none",
+            "path": "datastore",
+            "type": "levelds"
+          },
+          "mountpoint": "/",
+          "prefix": "leveldb.datastore",
+          "type": "measure"
+        },
+        {
+          "child": {
             "path": "blocks",
             "shardFunc": "/repo/flatfs/shard/v1/next-to-last/2",
             "sync": true,
@@ -26,16 +38,6 @@ var defaultConfig = []byte(`{
           "mountpoint": "/blocks",
           "prefix": "flatfs.datastore",
           "type": "measure"
-        },
-        {
-          "child": {
-            "compression": "none",
-            "path": "datastore",
-            "type": "levelds"
-          },
-          "mountpoint": "/",
-          "prefix": "leveldb.datastore",
-          "type": "measure"
         }
       ],
       "type": "mount"

repo/fsrepo/datastores.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"path/filepath"
+	"sort"
 
 	repo "github.com/ipfs/go-ipfs/repo"
 
@@ -114,6 +115,10 @@ func MountDatastoreConfig(params map[string]interface{}) (DatastoreConfig, error
 			prefix: ds.NewKey(prefix.(string)),
 		})
 	}
+	sort.Slice(res.mounts,
+		func(i, j int) bool {
+			return res.mounts[i].prefix.String() > res.mounts[j].prefix.String()
+		})
 
 	return &res, nil
 }