// Copyright 2020 The Gitea Authors. All rights reserved.// Use of this source code is governed by a MIT-style// license that can be found in the LICENSE file. package git import (	"crypto/sha256"	"fmt" 	"code.gitea.io/gitea/modules/log") // Cache represents a caching interfacetype Cache interface {	// Put puts value into cache with key and expire time.	Put(key string, val interface{}, timeout int64) error	// Get gets cached value by given key.	Get(key string) interface{}} func (c *LastCommitCache) getCacheKey(repoPath, ref, entryPath string) string {	hashBytes := sha256.Sum256([]byte(fmt.Sprintf("%s:%s:%s", repoPath, ref, entryPath)))	return fmt.Sprintf("last_commit:%x", hashBytes)} // Put put the last commit id with commit and entry pathfunc (c *LastCommitCache) Put(ref, entryPath, commitID string) error {	if c == nil || c.cache == nil {		return nil	}	log.Debug("LastCommitCache save: [%s:%s:%s]", ref, entryPath, commitID)	return c.cache.Put(c.getCacheKey(c.repoPath, ref, entryPath), commitID, c.ttl())}