Make sure module config loading errors have file positioning info

Fixes #8845

common/herrors/error_locator.go

@@ -100,6 +100,17 @@ func WithFileContextForFile(e error, realFilename, filename string, fs afero.Fs,
 	return WithFileContext(e, realFilename, f, matcher)
 }
 
+// WithFileContextForFileDefault tries to add file context using the default line matcher.
+func WithFileContextForFileDefault(err error, filename string, fs afero.Fs) error {
+	err, _ = WithFileContextForFile(
+		err,
+		filename,
+		filename,
+		fs,
+		SimpleLineMatcher)
+	return err
+}
+
 // WithFileContextForFile will try to add a file context with lines matching the given matcher.
 // If no match could be found, the original error is returned with false as the second return value.
 func WithFileContext(e error, realFilename string, r io.Reader, matcher LineMatcherFn) (error, bool) {

config/configLoader.go

@@ -18,6 +18,8 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/gohugoio/hugo/common/herrors"
+
 	"github.com/pkg/errors"
 
 	"github.com/gohugoio/hugo/common/paths"
@@ -58,7 +60,7 @@ func FromConfigString(config, configType string) (Provider, error) {
 func FromFile(fs afero.Fs, filename string) (Provider, error) {
 	m, err := loadConfigFromFile(fs, filename)
 	if err != nil {
-		return nil, err
+		return nil, herrors.WithFileContextForFileDefault(err, filename, fs)
 	}
 	return NewFrom(m), nil
 }

hugolib/config.go

@@ -507,11 +507,5 @@ func (configLoader) loadSiteConfig(cfg config.Provider) (scfg SiteConfig, err er
 }
 
 func (l configLoader) wrapFileError(err error, filename string) error {
-	err, _ = herrors.WithFileContextForFile(
-		err,
-		filename,
-		filename,
-		l.Fs,
-		herrors.SimpleLineMatcher)
-	return err
+	return herrors.WithFileContextForFileDefault(err, filename, l.Fs)
 }

modules/collect.go

@@ -437,7 +437,7 @@ func (c *collector) applyThemeConfig(tc *moduleAdapter) error {
 			var err error
 			tc.cfg, err = config.FromFile(c.fs, configFilename)
 			if err != nil {
-				return errors.Wrapf(err, "failed to read module config for %q in %q", tc.Path(), configFilename)
+				return err
 			}
 		}