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forgejo/modules/git/last_commit_cache_gogit.go
zeripath 001dbf100d
Defer Last Commit Info (#16467)
One of the biggest reasons for slow repository browsing is that we wait
until last commit information has been generated for all files in the
repository.

This PR proposes deferring this generation to a new POST endpoint that
does the look up outside of the main page request.

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-10-08 15:08:22 +02:00

113 lines
2.8 KiB
Go

// 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.
//go:build gogit
// +build gogit
package git
import (
"context"
"code.gitea.io/gitea/modules/log"
"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 func() 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 func() 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.Debug("LastCommitCache hit level 1: [%s:%s:%s]", ref, entryPath, vs)
if commit, ok := c.commitCache[vs]; ok {
log.Debug("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(ctx context.Context, commit *Commit) error {
commitNodeIndex, _ := commit.repo.CommitNodeIndex()
index, err := commitNodeIndex.Get(commit.ID)
if err != nil {
return err
}
return c.recursiveCache(ctx, index, &commit.Tree, "", 1)
}
func (c *LastCommitCache) recursiveCache(ctx context.Context, 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(ctx, c, index, treePath, entryPaths)
if err != nil {
return err
}
for entry := range commits {
if entryMap[entry].IsDir() {
subTree, err := tree.SubTree(entry)
if err != nil {
return err
}
if err := c.recursiveCache(ctx, index, subTree, entry, level-1); err != nil {
return err
}
}
}
return nil
}