chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

services/secrets/validation.go

@@ -0,0 +1,33 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package secrets
+
+import (
+	"regexp"
+	"strings"
+	"sync"
+
+	"gitea.dev/modules/util"
+)
+
+// https://docs.github.com/en/actions/learn-github-actions/variables#naming-conventions-for-configuration-variables
+// https://docs.github.com/en/actions/security-guides/encrypted-secrets#naming-your-secrets
+var globalVars = sync.OnceValue(func() (ret struct {
+	namePattern, forbiddenPrefixPattern *regexp.Regexp
+},
+) {
+	ret.namePattern = regexp.MustCompile("(?i)^[A-Z_][A-Z0-9_]*$")
+	ret.forbiddenPrefixPattern = regexp.MustCompile("(?i)^GIT(EA|HUB)_")
+	return ret
+})
+
+func ValidateName(name string) error {
+	vars := globalVars()
+	if !vars.namePattern.MatchString(name) ||
+		vars.forbiddenPrefixPattern.MatchString(name) ||
+		strings.EqualFold(name, "CI") /* CI is always set to true in GitHub Actions*/ {
+		return util.NewInvalidArgumentErrorf("invalid variable or secret name")
+	}
+	return nil
+}