build: fix env vars check for vcs details

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

build/git.go

@@ -24,13 +24,13 @@ func getGitAttributes(ctx context.Context, contextPath string, dockerfilePath st
 	if v, ok := os.LookupEnv("BUILDX_GIT_LABELS"); ok {
 		if v == "full" { // backward compatibility with old "full" mode
 			setGitLabels = true
-		} else if v, _ := strconv.ParseBool(v); v {
+		} else if v, err := strconv.ParseBool(v); err == nil {
 			setGitLabels = v
 		}
 	}
 	setGitInfo := true
 	if v, ok := os.LookupEnv("BUILDX_GIT_INFO"); ok {
-		if v, _ := strconv.ParseBool(v); v {
+		if v, err := strconv.ParseBool(v); err == nil {
 			setGitInfo = v
 		}
 	}

build/git_test.go

@@ -43,6 +43,12 @@ func TestGetGitAttributes(t *testing.T) {
 				"vcs:revision",
 			},
 		},
+		{
+			name:         "none",
+			envGitLabels: "false",
+			envGitInfo:   "false",
+			expected:     []string{},
+		},
 		{
 			name:         "gitinfo",
 			envGitLabels: "false",