Add Debian package registry (#22854)

Co-authored-by: @awkwardbunny

This PR adds a Debian package registry. You can follow [this
tutorial](https://www.baeldung.com/linux/create-debian-package) to build
a *.deb package for testing. Source packages are not supported at the
moment and I did not find documentation of the architecture "all" and
how these packages should be treated.

---------

Co-authored-by: Brian Hong <brian@hongs.me>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

models/packages/package_file.go

@@ -117,13 +117,15 @@ func DeleteFileByID(ctx context.Context, fileID int64) error {
 
 // PackageFileSearchOptions are options for SearchXXX methods
 type PackageFileSearchOptions struct {
-	OwnerID      int64
-	PackageType  string
-	VersionID    int64
-	Query        string
-	CompositeKey string
-	Properties   map[string]string
-	OlderThan    time.Duration
+	OwnerID        int64
+	PackageType    string
+	VersionID      int64
+	Query          string
+	CompositeKey   string
+	Properties     map[string]string
+	OlderThan      time.Duration
+	HashAlgorithmn string
+	Hash           string
 	db.Paginator
 }
 
@@ -182,6 +184,15 @@ func (opts *PackageFileSearchOptions) toConds() builder.Cond {
 		cond = cond.And(builder.Lt{"package_file.created_unix": time.Now().Add(-opts.OlderThan).Unix()})
 	}
 
+	if opts.Hash != "" && (opts.HashAlgorithmn == "md5" || opts.HashAlgorithmn == "sha1" || opts.HashAlgorithmn == "sha256" || opts.HashAlgorithmn == "sha512") {
+		innerCond := builder.
+			Expr("package_blob.id = package_file.blob_id").
+			And(builder.Eq{
+				"package_blob.hash_" + opts.HashAlgorithmn: opts.Hash,
+			})
+		cond = cond.And(builder.Exists(builder.Select("package_blob.id").From("package_blob").Where(innerCond)))
+	}
+
 	return cond
 }