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forgejo/services/repository/push.go
Lunny Xiao bd820aa9c5
Add context cache as a request level cache (#22294)
To avoid duplicated load of the same data in an HTTP request, we can set
a context cache to do that. i.e. Some pages may load a user from a
database with the same id in different areas on the same page. But the
code is hidden in two different deep logic. How should we share the
user? As a result of this PR, now if both entry functions accept
`context.Context` as the first parameter and we just need to refactor
`GetUserByID` to reuse the user from the context cache. Then it will not
be loaded twice on an HTTP request.

But of course, sometimes we would like to reload an object from the
database, that's why `RemoveContextData` is also exposed.

The core context cache is here. It defines a new context
```go
type cacheContext struct {
	ctx  context.Context
	data map[any]map[any]any
        lock sync.RWMutex
}

var cacheContextKey = struct{}{}

func WithCacheContext(ctx context.Context) context.Context {
	return context.WithValue(ctx, cacheContextKey, &cacheContext{
		ctx:  ctx,
		data: make(map[any]map[any]any),
	})
}
```

Then you can use the below 4 methods to read/write/del the data within
the same context.

```go
func GetContextData(ctx context.Context, tp, key any) any
func SetContextData(ctx context.Context, tp, key, value any)
func RemoveContextData(ctx context.Context, tp, key any)
func GetWithContextCache[T any](ctx context.Context, cacheGroupKey string, cacheTargetID any, f func() (T, error)) (T, error)
```

Then let's take a look at how `system.GetString` implement it.

```go
func GetSetting(ctx context.Context, key string) (string, error) {
	return cache.GetWithContextCache(ctx, contextCacheKey, key, func() (string, error) {
		return cache.GetString(genSettingCacheKey(key), func() (string, error) {
			res, err := GetSettingNoCache(ctx, key)
			if err != nil {
				return "", err
			}
			return res.SettingValue, nil
		})
	})
}
```

First, it will check if context data include the setting object with the
key. If not, it will query from the global cache which may be memory or
a Redis cache. If not, it will get the object from the database. In the
end, if the object gets from the global cache or database, it will be
set into the context cache.

An object stored in the context cache will only be destroyed after the
context disappeared.
2023-02-15 21:37:34 +08:00

417 lines
13 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package repository
import (
"context"
"errors"
"fmt"
"strings"
"time"
"code.gitea.io/gitea/models/db"
git_model "code.gitea.io/gitea/models/git"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/cache"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/notification"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/queue"
repo_module "code.gitea.io/gitea/modules/repository"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/timeutil"
issue_service "code.gitea.io/gitea/services/issue"
pull_service "code.gitea.io/gitea/services/pull"
)
// pushQueue represents a queue to handle update pull request tests
var pushQueue queue.Queue
// handle passed PR IDs and test the PRs
func handle(data ...queue.Data) []queue.Data {
for _, datum := range data {
opts := datum.([]*repo_module.PushUpdateOptions)
if err := pushUpdates(opts); err != nil {
log.Error("pushUpdate failed: %v", err)
}
}
return nil
}
func initPushQueue() error {
pushQueue = queue.CreateQueue("push_update", handle, []*repo_module.PushUpdateOptions{})
if pushQueue == nil {
return errors.New("unable to create push_update Queue")
}
go graceful.GetManager().RunWithShutdownFns(pushQueue.Run)
return nil
}
// PushUpdate is an alias of PushUpdates for single push update options
func PushUpdate(opts *repo_module.PushUpdateOptions) error {
return PushUpdates([]*repo_module.PushUpdateOptions{opts})
}
// PushUpdates adds a push update to push queue
func PushUpdates(opts []*repo_module.PushUpdateOptions) error {
if len(opts) == 0 {
return nil
}
for _, opt := range opts {
if opt.IsNewRef() && opt.IsDelRef() {
return fmt.Errorf("Old and new revisions are both %s", git.EmptySHA)
}
}
return pushQueue.Push(opts)
}
// pushUpdates generates push action history feeds for push updating multiple refs
func pushUpdates(optsList []*repo_module.PushUpdateOptions) error {
if len(optsList) == 0 {
return nil
}
ctx, _, finished := process.GetManager().AddContext(graceful.GetManager().HammerContext(), fmt.Sprintf("PushUpdates: %s/%s", optsList[0].RepoUserName, optsList[0].RepoName))
defer finished()
repo, err := repo_model.GetRepositoryByOwnerAndName(ctx, optsList[0].RepoUserName, optsList[0].RepoName)
if err != nil {
return fmt.Errorf("GetRepositoryByOwnerAndName failed: %w", err)
}
repoPath := repo.RepoPath()
gitRepo, err := git.OpenRepository(ctx, repoPath)
if err != nil {
return fmt.Errorf("OpenRepository[%s]: %w", repoPath, err)
}
defer gitRepo.Close()
if err = repo_module.UpdateRepoSize(ctx, repo); err != nil {
log.Error("Failed to update size for repository: %v", err)
}
addTags := make([]string, 0, len(optsList))
delTags := make([]string, 0, len(optsList))
var pusher *user_model.User
for _, opts := range optsList {
log.Trace("pushUpdates: %-v %s %s %s", repo, opts.OldCommitID, opts.NewCommitID, opts.RefFullName)
if opts.IsNewRef() && opts.IsDelRef() {
return fmt.Errorf("old and new revisions are both %s", git.EmptySHA)
}
if opts.IsTag() { // If is tag reference
if pusher == nil || pusher.ID != opts.PusherID {
if opts.PusherID == user_model.ActionsUserID {
pusher = user_model.NewActionsUser()
} else {
var err error
if pusher, err = user_model.GetUserByID(ctx, opts.PusherID); err != nil {
return err
}
}
}
tagName := opts.TagName()
if opts.IsDelRef() {
notification.NotifyPushCommits(
db.DefaultContext, pusher, repo,
&repo_module.PushUpdateOptions{
RefFullName: git.TagPrefix + tagName,
OldCommitID: opts.OldCommitID,
NewCommitID: git.EmptySHA,
}, repo_module.NewPushCommits())
delTags = append(delTags, tagName)
notification.NotifyDeleteRef(db.DefaultContext, pusher, repo, "tag", opts.RefFullName)
} else { // is new tag
newCommit, err := gitRepo.GetCommit(opts.NewCommitID)
if err != nil {
return fmt.Errorf("gitRepo.GetCommit(%s) in %s/%s[%d]: %w", opts.NewCommitID, repo.OwnerName, repo.Name, repo.ID, err)
}
commits := repo_module.NewPushCommits()
commits.HeadCommit = repo_module.CommitToPushCommit(newCommit)
commits.CompareURL = repo.ComposeCompareURL(git.EmptySHA, opts.NewCommitID)
notification.NotifyPushCommits(
db.DefaultContext, pusher, repo,
&repo_module.PushUpdateOptions{
RefFullName: git.TagPrefix + tagName,
OldCommitID: git.EmptySHA,
NewCommitID: opts.NewCommitID,
}, commits)
addTags = append(addTags, tagName)
notification.NotifyCreateRef(db.DefaultContext, pusher, repo, "tag", opts.RefFullName, opts.NewCommitID)
}
} else if opts.IsBranch() { // If is branch reference
if pusher == nil || pusher.ID != opts.PusherID {
if opts.PusherID == user_model.ActionsUserID {
pusher = user_model.NewActionsUser()
} else {
var err error
if pusher, err = user_model.GetUserByID(ctx, opts.PusherID); err != nil {
return err
}
}
}
branch := opts.BranchName()
if !opts.IsDelRef() {
log.Trace("TriggerTask '%s/%s' by %s", repo.Name, branch, pusher.Name)
go pull_service.AddTestPullRequestTask(pusher, repo.ID, branch, true, opts.OldCommitID, opts.NewCommitID)
newCommit, err := gitRepo.GetCommit(opts.NewCommitID)
if err != nil {
return fmt.Errorf("gitRepo.GetCommit(%s) in %s/%s[%d]: %w", opts.NewCommitID, repo.OwnerName, repo.Name, repo.ID, err)
}
refName := opts.RefName()
// Push new branch.
var l []*git.Commit
if opts.IsNewRef() {
if repo.IsEmpty { // Change default branch and empty status only if pushed ref is non-empty branch.
repo.DefaultBranch = refName
repo.IsEmpty = false
if repo.DefaultBranch != setting.Repository.DefaultBranch {
if err := gitRepo.SetDefaultBranch(repo.DefaultBranch); err != nil {
if !git.IsErrUnsupportedVersion(err) {
return err
}
}
}
// Update the is empty and default_branch columns
if err := repo_model.UpdateRepositoryCols(db.DefaultContext, repo, "default_branch", "is_empty"); err != nil {
return fmt.Errorf("UpdateRepositoryCols: %w", err)
}
}
l, err = newCommit.CommitsBeforeLimit(10)
if err != nil {
return fmt.Errorf("newCommit.CommitsBeforeLimit: %w", err)
}
notification.NotifyCreateRef(db.DefaultContext, pusher, repo, "branch", opts.RefFullName, opts.NewCommitID)
} else {
l, err = newCommit.CommitsBeforeUntil(opts.OldCommitID)
if err != nil {
return fmt.Errorf("newCommit.CommitsBeforeUntil: %w", err)
}
isForce, err := repo_module.IsForcePush(ctx, opts)
if err != nil {
log.Error("isForcePush %s:%s failed: %v", repo.FullName(), branch, err)
}
if isForce {
log.Trace("Push %s is a force push", opts.NewCommitID)
cache.Remove(repo.GetCommitsCountCacheKey(opts.RefName(), true))
} else {
// TODO: increment update the commit count cache but not remove
cache.Remove(repo.GetCommitsCountCacheKey(opts.RefName(), true))
}
}
commits := repo_module.GitToPushCommits(l)
commits.HeadCommit = repo_module.CommitToPushCommit(newCommit)
if err := issue_service.UpdateIssuesCommit(pusher, repo, commits.Commits, refName); err != nil {
log.Error("updateIssuesCommit: %v", err)
}
oldCommitID := opts.OldCommitID
if oldCommitID == git.EmptySHA && len(commits.Commits) > 0 {
oldCommit, err := gitRepo.GetCommit(commits.Commits[len(commits.Commits)-1].Sha1)
if err != nil && !git.IsErrNotExist(err) {
log.Error("unable to GetCommit %s from %-v: %v", oldCommitID, repo, err)
}
if oldCommit != nil {
for i := 0; i < oldCommit.ParentCount(); i++ {
commitID, _ := oldCommit.ParentID(i)
if !commitID.IsZero() {
oldCommitID = commitID.String()
break
}
}
}
}
if oldCommitID == git.EmptySHA && repo.DefaultBranch != branch {
oldCommitID = repo.DefaultBranch
}
if oldCommitID != git.EmptySHA {
commits.CompareURL = repo.ComposeCompareURL(oldCommitID, opts.NewCommitID)
} else {
commits.CompareURL = ""
}
if len(commits.Commits) > setting.UI.FeedMaxCommitNum {
commits.Commits = commits.Commits[:setting.UI.FeedMaxCommitNum]
}
notification.NotifyPushCommits(db.DefaultContext, pusher, repo, opts, commits)
if err = git_model.RemoveDeletedBranchByName(ctx, repo.ID, branch); err != nil {
log.Error("models.RemoveDeletedBranch %s/%s failed: %v", repo.ID, branch, err)
}
// Cache for big repository
if err := CacheRef(graceful.GetManager().HammerContext(), repo, gitRepo, opts.RefFullName); err != nil {
log.Error("repo_module.CacheRef %s/%s failed: %v", repo.ID, branch, err)
}
} else {
notification.NotifyDeleteRef(db.DefaultContext, pusher, repo, "branch", opts.RefFullName)
if err = pull_service.CloseBranchPulls(pusher, repo.ID, branch); err != nil {
// close all related pulls
log.Error("close related pull request failed: %v", err)
}
}
// Even if user delete a branch on a repository which he didn't watch, he will be watch that.
if err = repo_model.WatchIfAuto(db.DefaultContext, opts.PusherID, repo.ID, true); err != nil {
log.Warn("Fail to perform auto watch on user %v for repo %v: %v", opts.PusherID, repo.ID, err)
}
} else {
log.Trace("Non-tag and non-branch commits pushed.")
}
}
if err := PushUpdateAddDeleteTags(repo, gitRepo, addTags, delTags); err != nil {
return fmt.Errorf("PushUpdateAddDeleteTags: %w", err)
}
// Change repository last updated time.
if err := repo_model.UpdateRepositoryUpdatedTime(repo.ID, time.Now()); err != nil {
return fmt.Errorf("UpdateRepositoryUpdatedTime: %w", err)
}
return nil
}
// PushUpdateAddDeleteTags updates a number of added and delete tags
func PushUpdateAddDeleteTags(repo *repo_model.Repository, gitRepo *git.Repository, addTags, delTags []string) error {
return db.WithTx(db.DefaultContext, func(ctx context.Context) error {
if err := repo_model.PushUpdateDeleteTagsContext(ctx, repo, delTags); err != nil {
return err
}
return pushUpdateAddTags(ctx, repo, gitRepo, addTags)
})
}
// pushUpdateAddTags updates a number of add tags
func pushUpdateAddTags(ctx context.Context, repo *repo_model.Repository, gitRepo *git.Repository, tags []string) error {
if len(tags) == 0 {
return nil
}
lowerTags := make([]string, 0, len(tags))
for _, tag := range tags {
lowerTags = append(lowerTags, strings.ToLower(tag))
}
releases, err := repo_model.GetReleasesByRepoIDAndNames(ctx, repo.ID, lowerTags)
if err != nil {
return fmt.Errorf("GetReleasesByRepoIDAndNames: %w", err)
}
relMap := make(map[string]*repo_model.Release)
for _, rel := range releases {
relMap[rel.LowerTagName] = rel
}
newReleases := make([]*repo_model.Release, 0, len(lowerTags)-len(relMap))
emailToUser := make(map[string]*user_model.User)
for i, lowerTag := range lowerTags {
tag, err := gitRepo.GetTag(tags[i])
if err != nil {
return fmt.Errorf("GetTag: %w", err)
}
commit, err := tag.Commit(gitRepo)
if err != nil {
return fmt.Errorf("Commit: %w", err)
}
sig := tag.Tagger
if sig == nil {
sig = commit.Author
}
if sig == nil {
sig = commit.Committer
}
var author *user_model.User
createdAt := time.Unix(1, 0)
if sig != nil {
var ok bool
author, ok = emailToUser[sig.Email]
if !ok {
author, err = user_model.GetUserByEmail(ctx, sig.Email)
if err != nil && !user_model.IsErrUserNotExist(err) {
return fmt.Errorf("GetUserByEmail: %w", err)
}
if author != nil {
emailToUser[sig.Email] = author
}
}
createdAt = sig.When
}
commitsCount, err := commit.CommitsCount()
if err != nil {
return fmt.Errorf("CommitsCount: %w", err)
}
rel, has := relMap[lowerTag]
if !has {
rel = &repo_model.Release{
RepoID: repo.ID,
Title: "",
TagName: tags[i],
LowerTagName: lowerTag,
Target: "",
Sha1: commit.ID.String(),
NumCommits: commitsCount,
Note: "",
IsDraft: false,
IsPrerelease: false,
IsTag: true,
CreatedUnix: timeutil.TimeStamp(createdAt.Unix()),
}
if author != nil {
rel.PublisherID = author.ID
}
newReleases = append(newReleases, rel)
} else {
rel.Sha1 = commit.ID.String()
rel.CreatedUnix = timeutil.TimeStamp(createdAt.Unix())
rel.NumCommits = commitsCount
rel.IsDraft = false
if rel.IsTag && author != nil {
rel.PublisherID = author.ID
}
if err = repo_model.UpdateRelease(ctx, rel); err != nil {
return fmt.Errorf("Update: %w", err)
}
}
}
if len(newReleases) > 0 {
if err = db.Insert(ctx, newReleases); err != nil {
return fmt.Errorf("Insert: %w", err)
}
}
return nil
}