fix: backport various fixes (#39203, #39236, #39239, #39248, #39251) (#39252)

modules/packages/content_store.go

@@ -4,11 +4,14 @@
 package packages
 
 import (
+	"errors"
 	"io"
+	"io/fs"
 	"net/url"
 	"path"
 	"strings"
 
+	"gitea.dev/modules/optional"
 	"gitea.dev/modules/setting"
 	"gitea.dev/modules/storage"
 	"gitea.dev/modules/util"
@@ -47,6 +50,17 @@ func (s *ContentStore) Has(key BlobHash256Key) error {
 	return err
 }
 
+func (s *ContentStore) OptionalSize(key BlobHash256Key) (sz optional.Option[int64], _ error) {
+	st, err := s.store.Stat(KeyToRelativePath(key))
+	if errors.Is(err, fs.ErrNotExist) {
+		return sz, nil
+	}
+	if err != nil {
+		return sz, err
+	}
+	return optional.Some(st.Size()), nil
+}
+
 // Save stores a package blob
 func (s *ContentStore) Save(key BlobHash256Key, r io.Reader, size int64) error {
 	_, err := s.store.Save(KeyToRelativePath(key), r, size)