chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

modules/indexer/code/internal/util.go

@@ -0,0 +1,48 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package internal
+
+import (
+	"strings"
+
+	"gitea.dev/modules/indexer/internal"
+	"gitea.dev/modules/log"
+)
+
+const filenameMatchNumberOfLines = 7 // Copied from GitHub search
+
+func FilenameIndexerID(repoID int64, filename string) string {
+	return internal.Base36(repoID) + "_" + filename
+}
+
+func ParseIndexerID(indexerID string) (int64, string) {
+	before, after, ok := strings.Cut(indexerID, "_")
+	if !ok {
+		log.Error("Unexpected ID in repo indexer: %s", indexerID)
+	}
+	repoID, _ := internal.ParseBase36(before)
+	return repoID, after
+}
+
+func FilenameOfIndexerID(indexerID string) string {
+	_, after, ok := strings.Cut(indexerID, "_")
+	if !ok {
+		log.Error("Unexpected ID in repo indexer: %s", indexerID)
+	}
+	return after
+}
+
+// FilenameMatchIndexPos returns the boundaries of its first seven lines.
+func FilenameMatchIndexPos(content string) (int, int) {
+	count := 1
+	for i, c := range content {
+		if c == '\n' {
+			count++
+			if count == filenameMatchNumberOfLines {
+				return 0, i
+			}
+		}
+	}
+	return 0, len(content)
+}