Improve error messages, esp. when the server is running

* Add file context to minifier errors when publishing
* Misc fixes (see issues)
* Allow custom server error template in layouts/server/error.html

To get to this, this commit also cleans up and simplifies the code surrounding errors and files. This also removes the usage of `github.com/pkg/errors`, mostly because of https://github.com/pkg/errors/issues/223 -- but also because most of this is now built-in to Go.

Fixes #9852
Fixes #9857
Fixes #9863

2 files changed, 4 insertions, 5 deletions

diff --git a/navigation/menu.go b/navigation/menu.go
index 02e1f8fec..5e4996f39 100644
--- a/navigation/menu.go
+++ b/navigation/menu.go
@@ -19,8 +19,6 @@ import (
 	"sort"
 	"strings"
 
-	"github.com/pkg/errors"
-
 	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/compare"
@@ -190,7 +188,7 @@ func (m *MenuEntry) MarshallMap(ime map[string]any) error {
 	}
 
 	if err != nil {
-		return errors.Wrapf(err, "failed to marshal menu entry %q", m.KeyName())
+		return fmt.Errorf("failed to marshal menu entry %q: %w", m.KeyName(), err)
 	}
 
 	return nil
diff --git a/navigation/pagemenus.go b/navigation/pagemenus.go
index 46ed5221e..7b4f6f648 100644
--- a/navigation/pagemenus.go
+++ b/navigation/pagemenus.go
@@ -14,10 +14,11 @@
 package navigation
 
 import (
+	"fmt"
+
 	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/common/types"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cast"
 )
 
@@ -76,7 +77,7 @@ func PageMenusFromPage(p Page) (PageMenus, error) {
 	}
 
 	var wrapErr = func(err error) error {
-		return errors.Wrapf(err, "unable to process menus for page %q", p.Path())
+		return fmt.Errorf("unable to process menus for page %q: %w", p.Path(), err)
 	}
 
 	// Could be a structured menu entry