modules: Do not check for remote modules if main project is vendored

Fixes #6506

modules/client_test.go

@@ -78,9 +78,9 @@ github.com/gohugoio/hugoTestModules1_darwin/modh2_2@v1.4.0 github.com/gohugoio/h
 	c.Assert(client.Vendor(), qt.IsNil)
 	graphb.Reset()
 	c.Assert(client.Graph(&graphb), qt.IsNil)
-	expectVendored := `github.com/gohugoio/tests/hugo-modules-basic-test github.com/gohugoio/hugoTestModules1_darwin/modh2_2@v1.4.0+vendor
-github.com/gohugoio/tests/hugo-modules-basic-test github.com/gohugoio/hugoTestModules1_darwin/modh2_2_1v@v1.3.0+vendor
-github.com/gohugoio/tests/hugo-modules-basic-test github.com/gohugoio/hugoTestModules1_darwin/modh2_2_2@v1.3.0+vendor
+	expectVendored := `project github.com/gohugoio/hugoTestModules1_darwin/modh2_2@v1.4.0+vendor
+project github.com/gohugoio/hugoTestModules1_darwin/modh2_2_1v@v1.3.0+vendor
+project github.com/gohugoio/hugoTestModules1_darwin/modh2_2_2@v1.3.0+vendor
 `
 	c.Assert(graphb.String(), qt.Equals, expectVendored)
 

modules/collect.go

@@ -191,6 +191,11 @@ func (c *collector) initModules() error {
 	c.collected = &collected{
 		seen:     make(map[string]bool),
 		vendored: make(map[string]vendoredModule),
+		gomods:   goModules{},
+	}
+
+	if !c.ccfg.IgnoreVendor && c.isVendored(c.ccfg.WorkingDir) {
+		return nil
 	}
 
 	// We may fail later if we don't find the mods.
@@ -463,6 +468,7 @@ func (c *collector) applyThemeConfig(tc *moduleAdapter) error {
 }
 
 func (c *collector) collect() {
+
 	if err := c.initModules(); err != nil {
 		c.err = err
 		return
@@ -480,6 +486,11 @@ func (c *collector) collect() {
 
 }
 
+func (c *collector) isVendored(dir string) bool {
+	_, err := c.fs.Stat(filepath.Join(dir, vendord, vendorModulesFilename))
+	return err == nil
+}
+
 func (c *collector) collectModulesTXT(owner Module) error {
 	vendorDir := filepath.Join(owner.Dir(), vendord)
 	filename := filepath.Join(vendorDir, vendorModulesFilename)