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Slightly simplify LastCommitCache (#20444)

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The LastCommitCache code is a little complex and there is unnecessary
duplication between the gogit and nogogit variants.

This PR adds the LastCommitCache as a field to the git.Repository and
pre-creates it in the ReferencesGit helpers etc. There has been some
simplification and unification of the variant code.

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2022-07-25 16:39:42 +01:00 • committed by GitHub
parent 690272d2e2
commit a2cfcdb91a
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GPG key ID: 4AEE18F83AFDEB23
19 changed files with 177 additions and 182 deletions
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63
modules/git/last_commit_cache_nogogit.go
View file

@ -7,67 +7,18 @@
package git
import (
"bufio"
"context"
"code.gitea.io/gitea/modules/log"
)
// LastCommitCache represents a cache to store last commit
type LastCommitCache struct {
repoPath string
ttl func() int64
repo *Repository
commitCache map[string]*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 {
// CacheCommit will cache the commit from the gitRepository
func (c *Commit) CacheCommit(ctx context.Context) error {
if c.repo.LastCommitCache == nil {
return nil
}
return &LastCommitCache{
repoPath: repoPath,
repo: gitRepo,
commitCache: make(map[string]*Commit),
ttl: ttl,
cache: cache,
}
return c.recursiveCache(ctx, &c.Tree, "", 1)
}
// Get get the last commit information by commit id and entry path
func (c *LastCommitCache) Get(ref, entryPath string, wr WriteCloserError, rd *bufio.Reader) (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
}
if _, err := wr.Write([]byte(vs + "\n")); err != nil {
return nil, err
}
commit, err := c.repo.getCommitFromBatchReader(rd, 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 {
return c.recursiveCache(ctx, commit, &commit.Tree, "", 1)
}
func (c *LastCommitCache) recursiveCache(ctx context.Context, commit *Commit, tree *Tree, treePath string, level int) error {
func (c *Commit) recursiveCache(ctx context.Context, tree *Tree, treePath string, level int) error {
if level == 0 {
return nil
}
@ -82,7 +33,7 @@ func (c *LastCommitCache) recursiveCache(ctx context.Context, commit *Commit, tr
entryPaths[i] = entry.Name()
}
_, err = WalkGitLog(ctx, c, commit.repo, commit, treePath, entryPaths...)
_, err = WalkGitLog(ctx, c.repo, c, treePath, entryPaths...)
if err != nil {
return err
}
@ -94,7 +45,7 @@ func (c *LastCommitCache) recursiveCache(ctx context.Context, commit *Commit, tr
if err != nil {
return err
}
if err := c.recursiveCache(ctx, commit, subTree, treeEntry.Name(), level-1); err != nil {
if err := c.recursiveCache(ctx, subTree, treeEntry.Name(), level-1); err != nil {
return err
}
}