Update kv with existence check

vendor/github.com/hashicorp/vault-plugin-secrets-kv/options.json

@@ -1,7 +0,0 @@
-{
-    "options": {
-    },
-    "data": {
-        "bar": "baz"
-    }
-}

vendor/github.com/hashicorp/vault-plugin-secrets-kv/path_data.go

@@ -49,11 +49,26 @@ version matches the version specified in the cas parameter.`,
 			logical.DeleteOperation: b.upgradeCheck(b.pathDataDelete()),
 		},
 
+		ExistenceCheck: b.dataExistenceCheck(),
+
 		HelpSynopsis:    dataHelpSyn,
 		HelpDescription: dataHelpDesc,
 	}
 }
 
+func (b *versionedKVBackend) dataExistenceCheck() framework.ExistenceFunc {
+	return func(ctx context.Context, req *logical.Request, data *framework.FieldData) (bool, error) {
+		key := strings.TrimPrefix(req.Path, "data/")
+
+		meta, err := b.getKeyMetadata(ctx, req.Storage, key)
+		if err != nil {
+			return false, err
+		}
+
+		return meta != nil, nil
+	}
+}
+
 // pathDataRead handles read commands to a kv entry
 func (b *versionedKVBackend) pathDataRead() framework.OperationFunc {
 	return func(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {

vendor/vendor.json

@@ -1303,10 +1303,10 @@
 			"revisionTime": "2018-03-20T18:05:36Z"
 		},
 		{
-			"checksumSHA1": "j3fIbBNDLAjg8pH3FnmbcqGcCVo=",
+			"checksumSHA1": "ZYuIUFGjAZ2rgy/zwdjfANFZc/U=",
 			"path": "github.com/hashicorp/vault-plugin-secrets-kv",
-			"revision": "d56826f0e6c085b99e83d984e7bb69b2f6655a45",
-			"revisionTime": "2018-03-22T01:57:02Z"
+			"revision": "76db4647de517c512e7f87b78c1afc84acf97918",
+			"revisionTime": "2018-03-22T02:53:20Z"
 		},
 		{
 			"checksumSHA1": "vTfeYxi0Z1y176bjQaYh1/FpQ9s=",