Allow no indent at all for json store

Signed-off-by: Bastien Wermeille <bastien.wermeille@gmail.com>

stores/json/store.go

@@ -250,7 +250,7 @@ func (store Store) treeBranchFromJSON(in []byte) (sops.TreeBranch, error) {
 func (store Store) reindentJSON(in []byte) ([]byte, error) {
 	var out bytes.Buffer
 	indent := "\t"
-	if store.config.Indent != 0 {
+	if store.config.Indent != -1 {
 		indent = strings.Repeat(" ", store.config.Indent)
 	}
 	err := json.Indent(&out, in, "", indent)

stores/json/store_test.go

@@ -313,7 +313,11 @@ func TestEncodeJSONArrayOfObjects(t *testing.T) {
 		2
 	]
 }`
-	store := Store{}
+	store := Store{
+		config: config.JSONStoreConfig{
+			Indent: -1,
+		},
+	}
 	out, err := store.EmitPlainFile(tree.Branches)
 	assert.Nil(t, err)
 	assert.Equal(t, expected, string(out))
@@ -485,7 +489,53 @@ func TestIndentDefault(t *testing.T) {
 		2
 	]
 }`
-	store := Store{}
+	store := Store{
+		config: config.JSONStoreConfig{
+			Indent: -1,
+		},
+	}
+	out, err := store.EmitPlainFile(tree.Branches)
+	assert.Nil(t, err)
+	assert.Equal(t, expected, string(out))
+}
+
+func TestNoIndent(t *testing.T) {
+	tree := sops.Tree{
+		Branches: sops.TreeBranches{
+			sops.TreeBranch{
+				sops.TreeItem{
+					Key: "foo",
+					Value: []interface{}{
+						sops.TreeBranch{
+							sops.TreeItem{
+								Key:   "foo",
+								Value: 3,
+							},
+							sops.TreeItem{
+								Key:   "bar",
+								Value: false,
+							},
+						},
+						2,
+					},
+				},
+			},
+		},
+	}
+	expected := `{
+"foo": [
+{
+"foo": 3,
+"bar": false
+},
+2
+]
+}`
+	store := Store{
+		config: config.JSONStoreConfig{
+			Indent: 0,
+		},
+	}
 	out, err := store.EmitPlainFile(tree.Branches)
 	assert.Nil(t, err)
 	assert.Equal(t, expected, string(out))