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path: root/services/repository/cache.go
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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package repository

import (
	"context"
	"strings"

	repo_model "code.gitea.io/gitea/models/repo"
	"code.gitea.io/gitea/modules/cache"
	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/setting"
)

func getRefName(fullRefName string) string {
	if strings.HasPrefix(fullRefName, git.TagPrefix) {
		return fullRefName[len(git.TagPrefix):]
	} else if strings.HasPrefix(fullRefName, git.BranchPrefix) {
		return fullRefName[len(git.BranchPrefix):]
	}
	return ""
}

// CacheRef cachhe last commit information of the branch or the tag
func CacheRef(ctx context.Context, repo *repo_model.Repository, gitRepo *git.Repository, fullRefName string) error {
	if !setting.CacheService.LastCommit.Enabled {
		return nil
	}

	commit, err := gitRepo.GetCommit(fullRefName)
	if err != nil {
		return err
	}

	if gitRepo.LastCommitCache == nil {
		commitsCount, err := cache.GetInt64(repo.GetCommitsCountCacheKey(getRefName(fullRefName), true), commit.CommitsCount)
		if err != nil {
			return err
		}
		gitRepo.LastCommitCache = git.NewLastCommitCache(commitsCount, repo.FullName(), gitRepo, cache.GetCache())
	}

	return commit.CacheCommit(ctx)
}