feat: extend GoModResolver to support any valid Go *.mod file

Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com>

Author: ivankatliarchuk

pkg/deps/golang.go

@@ -55,14 +55,21 @@ func (resolver *GoModResolver) CanResolve(file string) bool {
 	return strings.HasSuffix(base, ".mod")
 }
 
-// Resolve resolves licenses of all dependencies declared in the go.mod file.
-func (resolver *GoModResolver) Resolve(goModFile string, config *ConfigDeps, report *Report) error {
-	content, err := os.ReadFile(goModFile)
+func validateGoModFile(file string) error {
+	content, err := os.ReadFile(file)
 	if err != nil {
 		return err
 	}
 	if !goModuleDirective.Match(content) || !goVersionDirective.Match(content) {
-		return fmt.Errorf("%v is not a valid Go module file", goModFile)
+		return fmt.Errorf("%v is not a valid Go module file", file)
+	}
+	return nil
+}
+
+// Resolve resolves licenses of all dependencies declared in the go.mod file.
+func (resolver *GoModResolver) Resolve(goModFile string, config *ConfigDeps, report *Report) error {
+	if err := validateGoModFile(goModFile); err != nil {
+		return err
 	}
 
 	if err := os.Chdir(filepath.Dir(goModFile)); err != nil {

pkg/deps/golang_test.go

@@ -23,9 +23,10 @@ import (
 	"path/filepath"
 	"testing"
 
+	"golang.org/x/tools/go/packages"
+
 	"github.com/apache/skywalking-eyes/pkg/deps"
 	"github.com/apache/skywalking-eyes/pkg/logger"
-	"golang.org/x/tools/go/packages"
 )
 
 func TestMain(m *testing.M) {
@@ -116,8 +117,8 @@ func TestResolvePackageLicense(t *testing.T) {
 		if len(report.Resolved) != 1 {
 			t.Fatalf("expected 1 resolved, got %d", len(report.Resolved))
 		}
-		if report.Resolved[0].LicenseSpdxID != "Apache-2.0" {
-			t.Errorf("expected Apache-2.0, got %v", report.Resolved[0].LicenseSpdxID)
+		if report.Resolved[0].LicenseSpdxID != npmLicenseApache20 {
+			t.Errorf("expected %v, got %v", npmLicenseApache20, report.Resolved[0].LicenseSpdxID)
 		}
 	})