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// 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.
// +build gogit
package git
import (
"path"
"github.com/go-git/go-git/v5/plumbing/object"
cgobject "github.com/go-git/go-git/v5/plumbing/object/commitgraph"
)
// LastCommitCache represents a cache to store last commit
type LastCommitCache struct {
repoPath string
ttl int64
repo *Repository
commitCache map[string]*object.Commit
cache Cache
}
// NewLastCommitCache creates a new last commit cache for repo
func NewLastCommitCache(repoPath string, gitRepo *Repository, ttl int64, cache Cache) *LastCommitCache {
if cache == nil {
return nil
}
return &LastCommitCache{
repoPath: repoPath,
repo: gitRepo,
commitCache: make(map[string]*object.Commit),
ttl: ttl,
cache: cache,
}
}
// Get get the last commit information by commit id and entry path
func (c *LastCommitCache) Get(ref, entryPath string) (interface{}, error) {
v := c.cache.Get(c.getCacheKey(c.repoPath, ref, entryPath))
if vs, ok := v.(string); ok {
log("LastCommitCache hit level 1: [%s:%s:%s]", ref, entryPath, vs)
if commit, ok := c.commitCache[vs]; ok {
log("LastCommitCache hit level 2: [%s:%s:%s]", ref, entryPath, vs)
return commit, nil
}
id, err := c.repo.ConvertToSHA1(vs)
if err != nil {
return nil, err
}
commit, err := c.repo.GoGitRepo().CommitObject(id)
if err != nil {
return nil, err
}
c.commitCache[vs] = commit
return commit, nil
}
return nil, nil
}
// CacheCommit will cache the commit from the gitRepository
func (c *LastCommitCache) CacheCommit(commit *Commit) error {
commitNodeIndex, _ := commit.repo.CommitNodeIndex()
index, err := commitNodeIndex.Get(commit.ID)
if err != nil {
return err
}
return c.recursiveCache(index, &commit.Tree, "", 1)
}
func (c *LastCommitCache) recursiveCache(index cgobject.CommitNode, tree *Tree, treePath string, level int) error {
if level == 0 {
return nil
}
entries, err := tree.ListEntries()
if err != nil {
return err
}
entryPaths := make([]string, len(entries))
entryMap := make(map[string]*TreeEntry)
for i, entry := range entries {
entryPaths[i] = entry.Name()
entryMap[entry.Name()] = entry
}
commits, err := GetLastCommitForPaths(index, treePath, entryPaths)
if err != nil {
return err
}
for entry, cm := range commits {
if err := c.Put(index.ID().String(), path.Join(treePath, entry), cm.ID().String()); err != nil {
return err
}
if entryMap[entry].IsDir() {
subTree, err := tree.SubTree(entry)
if err != nil {
return err
}
if err := c.recursiveCache(index, subTree, entry, level-1); err != nil {
return err
}
}
}
return nil
}
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