mirror of
https://github.com/go-gitea/gitea.git
synced 2026-01-30 11:19:39 +01:00
3a09d7aa8d
Most potential deadlock problems should have been fixed, and new code is unlikely to cause new problems with the new design. Also raise the minimum Git version required to 2.6.0 (released in 2015)
411 lines
12 KiB
Go
411 lines
12 KiB
Go
// Copyright 2015 The Gogs Authors. All rights reserved.
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package wiki
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import (
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"context"
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"fmt"
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"os"
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"strings"
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"code.gitea.io/gitea/models/db"
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repo_model "code.gitea.io/gitea/models/repo"
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system_model "code.gitea.io/gitea/models/system"
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"code.gitea.io/gitea/models/unit"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/gitrepo"
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"code.gitea.io/gitea/modules/globallock"
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"code.gitea.io/gitea/modules/graceful"
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"code.gitea.io/gitea/modules/log"
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repo_module "code.gitea.io/gitea/modules/repository"
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asymkey_service "code.gitea.io/gitea/services/asymkey"
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repo_service "code.gitea.io/gitea/services/repository"
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)
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func getWikiWorkingLockKey(repoID int64) string {
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return fmt.Sprintf("wiki_working_%d", repoID)
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}
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// InitWiki initializes a wiki for repository,
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// it does nothing when repository already has wiki.
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func InitWiki(ctx context.Context, repo *repo_model.Repository) error {
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// don't use HasWiki because the error should not be ignored.
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if exist, err := gitrepo.IsRepositoryExist(ctx, repo.WikiStorageRepo()); err != nil {
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return err
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} else if exist {
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return nil
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}
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// wiki's object format should be the same as repository's
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if err := gitrepo.InitRepository(ctx, repo.WikiStorageRepo(), repo.ObjectFormatName); err != nil {
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return fmt.Errorf("InitRepository: %w", err)
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} else if err = gitrepo.CreateDelegateHooks(ctx, repo.WikiStorageRepo()); err != nil {
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return fmt.Errorf("createDelegateHooks: %w", err)
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} else if err = gitrepo.SetDefaultBranch(ctx, repo.WikiStorageRepo(), repo.DefaultWikiBranch); err != nil {
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return fmt.Errorf("unable to set default wiki branch to %q: %w", repo.DefaultWikiBranch, err)
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}
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return nil
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}
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// prepareGitPath try to find a suitable file path with file name by the given raw wiki name.
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// return: existence, prepared file path with name, error
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func prepareGitPath(gitRepo *git.Repository, defaultWikiBranch string, wikiPath WebPath) (bool, string, error) {
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unescaped := string(wikiPath) + ".md"
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gitPath := WebPathToGitPath(wikiPath)
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// Look for both files
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filesInIndex, err := gitRepo.LsTree(defaultWikiBranch, unescaped, gitPath)
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if err != nil {
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if strings.Contains(err.Error(), "Not a valid object name") {
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return false, gitPath, nil // branch doesn't exist
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}
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log.Error("Wiki LsTree failed, err: %v", err)
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return false, gitPath, err
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}
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foundEscaped := false
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for _, filename := range filesInIndex {
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switch filename {
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case unescaped:
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// if we find the unescaped file return it
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return true, unescaped, nil
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case gitPath:
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foundEscaped = true
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}
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}
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// If not return whether the escaped file exists, and the escaped filename to keep backwards compatibility.
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return foundEscaped, gitPath, nil
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}
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// updateWikiPage adds a new page or edits an existing page in repository wiki.
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func updateWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, oldWikiName, newWikiName WebPath, content, message string, isNew bool) (err error) {
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err = repo.MustNotBeArchived()
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if err != nil {
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return err
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}
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if err = validateWebPath(newWikiName); err != nil {
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return err
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}
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releaser, err := globallock.Lock(ctx, getWikiWorkingLockKey(repo.ID))
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if err != nil {
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return err
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}
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defer releaser()
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if err = InitWiki(ctx, repo); err != nil {
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return fmt.Errorf("InitWiki: %w", err)
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}
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hasDefaultBranch := gitrepo.IsBranchExist(ctx, repo.WikiStorageRepo(), repo.DefaultWikiBranch)
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basePath, cleanup, err := repo_module.CreateTemporaryPath("update-wiki")
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if err != nil {
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return err
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}
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defer cleanup()
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cloneOpts := git.CloneRepoOptions{
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Bare: true,
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Shared: true,
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}
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if hasDefaultBranch {
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cloneOpts.Branch = repo.DefaultWikiBranch
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}
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if err := gitrepo.CloneRepoToLocal(ctx, repo.WikiStorageRepo(), basePath, cloneOpts); err != nil {
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log.Error("Failed to clone repository: %s (%v)", repo.FullName(), err)
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return fmt.Errorf("failed to clone repository: %s (%w)", repo.FullName(), err)
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}
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gitRepo, err := git.OpenRepository(ctx, basePath)
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if err != nil {
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log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
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return fmt.Errorf("failed to open new temporary repository in: %s %w", basePath, err)
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}
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defer gitRepo.Close()
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if hasDefaultBranch {
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if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
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log.Error("Unable to read HEAD tree to index in: %s %v", basePath, err)
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return fmt.Errorf("unable to read HEAD tree to index in: %s %w", basePath, err)
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}
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}
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isWikiExist, newWikiPath, err := prepareGitPath(gitRepo, repo.DefaultWikiBranch, newWikiName)
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if err != nil {
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return err
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}
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if isNew {
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if isWikiExist {
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return repo_model.ErrWikiAlreadyExist{
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Title: newWikiPath,
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}
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}
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} else {
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// avoid check existence again if wiki name is not changed since gitRepo.LsFiles(...) is not free.
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isOldWikiExist := true
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oldWikiPath := newWikiPath
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if oldWikiName != newWikiName {
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isOldWikiExist, oldWikiPath, err = prepareGitPath(gitRepo, repo.DefaultWikiBranch, oldWikiName)
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if err != nil {
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return err
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}
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}
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if isOldWikiExist {
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err := gitRepo.RemoveFilesFromIndex(oldWikiPath)
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if err != nil {
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log.Error("RemoveFilesFromIndex failed: %v", err)
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return err
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}
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}
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}
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// FIXME: The wiki doesn't have lfs support at present - if this changes need to check attributes here
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objectHash, err := gitRepo.HashObjectBytes([]byte(content))
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if err != nil {
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log.Error("HashObject failed: %v", err)
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return err
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}
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if err := gitRepo.AddObjectToIndex("100644", objectHash, newWikiPath); err != nil {
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log.Error("AddObjectToIndex failed: %v", err)
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return err
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}
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tree, err := gitRepo.WriteTree()
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if err != nil {
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log.Error("WriteTree failed: %v", err)
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return err
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}
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commitTreeOpts := git.CommitTreeOpts{
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Message: message,
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}
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committer := doer.NewGitSig()
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originalGitRepo, closer, err := gitrepo.RepositoryFromContextOrOpen(ctx, repo.WikiStorageRepo())
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if err != nil {
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return fmt.Errorf("unable to open wiki repository: %w", err)
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}
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defer closer.Close()
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sign, signingKey, signer, _ := asymkey_service.SignWikiCommit(ctx, repo, originalGitRepo, doer)
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if sign {
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commitTreeOpts.Key = signingKey
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if repo.GetTrustModel() == repo_model.CommitterTrustModel || repo.GetTrustModel() == repo_model.CollaboratorCommitterTrustModel {
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committer = signer
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}
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} else {
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commitTreeOpts.NoGPGSign = true
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}
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if hasDefaultBranch {
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commitTreeOpts.Parents = []string{"HEAD"}
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}
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commitHash, err := gitRepo.CommitTree(doer.NewGitSig(), committer, tree, commitTreeOpts)
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if err != nil {
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log.Error("CommitTree failed: %v", err)
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return err
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}
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if err := gitrepo.PushFromLocal(ctx, basePath, repo.WikiStorageRepo(), git.PushOptions{
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Branch: fmt.Sprintf("%s:%s%s", commitHash.String(), git.BranchPrefix, repo.DefaultWikiBranch),
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Env: repo_module.FullPushingEnvironment(
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doer,
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doer,
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repo,
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repo.Name+".wiki",
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0,
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0,
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),
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}); err != nil {
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log.Error("Push failed: %v", err)
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if git.IsErrPushOutOfDate(err) || git.IsErrPushRejected(err) {
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return err
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}
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return fmt.Errorf("failed to push: %w", err)
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}
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return nil
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}
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// AddWikiPage adds a new wiki page with a given wikiPath.
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func AddWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, wikiName WebPath, content, message string) error {
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return updateWikiPage(ctx, doer, repo, "", wikiName, content, message, true)
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}
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// EditWikiPage updates a wiki page identified by its wikiPath,
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// optionally also changing wikiPath.
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func EditWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, oldWikiName, newWikiName WebPath, content, message string) error {
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return updateWikiPage(ctx, doer, repo, oldWikiName, newWikiName, content, message, false)
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}
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// DeleteWikiPage deletes a wiki page identified by its path.
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func DeleteWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, wikiName WebPath) (err error) {
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err = repo.MustNotBeArchived()
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if err != nil {
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return err
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}
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releaser, err := globallock.Lock(ctx, getWikiWorkingLockKey(repo.ID))
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if err != nil {
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return err
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}
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defer releaser()
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if err = InitWiki(ctx, repo); err != nil {
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return fmt.Errorf("InitWiki: %w", err)
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}
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basePath, cleanup, err := repo_module.CreateTemporaryPath("update-wiki")
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if err != nil {
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return err
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}
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defer cleanup()
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if err := gitrepo.CloneRepoToLocal(ctx, repo.WikiStorageRepo(), basePath, git.CloneRepoOptions{
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Bare: true,
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Shared: true,
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Branch: repo.DefaultWikiBranch,
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}); err != nil {
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log.Error("Failed to clone repository: %s (%v)", repo.FullName(), err)
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return fmt.Errorf("failed to clone repository: %s (%w)", repo.FullName(), err)
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}
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gitRepo, err := git.OpenRepository(ctx, basePath)
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if err != nil {
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log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
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return fmt.Errorf("failed to open new temporary repository in: %s %w", basePath, err)
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}
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defer gitRepo.Close()
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if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
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log.Error("Unable to read HEAD tree to index in: %s %v", basePath, err)
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return fmt.Errorf("unable to read HEAD tree to index in: %s %w", basePath, err)
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}
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found, wikiPath, err := prepareGitPath(gitRepo, repo.DefaultWikiBranch, wikiName)
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if err != nil {
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return err
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}
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if found {
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err := gitRepo.RemoveFilesFromIndex(wikiPath)
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if err != nil {
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return err
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}
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} else {
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return os.ErrNotExist
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}
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// FIXME: The wiki doesn't have lfs support at present - if this changes need to check attributes here
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tree, err := gitRepo.WriteTree()
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if err != nil {
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return err
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}
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message := fmt.Sprintf("Delete page %q", wikiName)
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commitTreeOpts := git.CommitTreeOpts{
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Message: message,
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Parents: []string{"HEAD"},
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}
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committer := doer.NewGitSig()
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originalGitRepo, closer, err := gitrepo.RepositoryFromContextOrOpen(ctx, repo.WikiStorageRepo())
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if err != nil {
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return fmt.Errorf("unable to open wiki repository: %w", err)
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}
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defer closer.Close()
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sign, signingKey, signer, _ := asymkey_service.SignWikiCommit(ctx, repo, originalGitRepo, doer)
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if sign {
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commitTreeOpts.Key = signingKey
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if repo.GetTrustModel() == repo_model.CommitterTrustModel || repo.GetTrustModel() == repo_model.CollaboratorCommitterTrustModel {
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committer = signer
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}
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} else {
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commitTreeOpts.NoGPGSign = true
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}
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commitHash, err := gitRepo.CommitTree(doer.NewGitSig(), committer, tree, commitTreeOpts)
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if err != nil {
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return err
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}
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if err := gitrepo.PushFromLocal(gitRepo.Ctx, basePath, repo.WikiStorageRepo(), git.PushOptions{
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Branch: fmt.Sprintf("%s:%s%s", commitHash.String(), git.BranchPrefix, repo.DefaultWikiBranch),
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Env: repo_module.FullPushingEnvironment(
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doer,
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doer,
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repo,
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repo.Name+".wiki",
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0,
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0,
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),
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}); err != nil {
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if git.IsErrPushOutOfDate(err) || git.IsErrPushRejected(err) {
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return err
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}
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return fmt.Errorf("Push: %w", err)
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}
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return nil
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}
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// DeleteWiki removes the actual and local copy of repository wiki.
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func DeleteWiki(ctx context.Context, repo *repo_model.Repository) error {
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if err := repo_service.UpdateRepositoryUnits(ctx, repo, nil, []unit.Type{unit.TypeWiki}); err != nil {
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return err
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}
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if err := gitrepo.DeleteRepository(ctx, repo.WikiStorageRepo()); err != nil {
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desc := fmt.Sprintf("Delete wiki repository files [%s]: %v", repo.FullName(), err)
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// Note we use the db.DefaultContext here rather than passing in a context as the context may be cancelled
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if err = system_model.CreateNotice(graceful.GetManager().ShutdownContext(), system_model.NoticeRepository, desc); err != nil {
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log.Error("CreateRepositoryNotice: %v", err)
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}
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}
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return nil
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}
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func ChangeDefaultWikiBranch(ctx context.Context, repo *repo_model.Repository, newBranch string) error {
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if !git.IsValidRefPattern(newBranch) {
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return fmt.Errorf("invalid branch name: %s", newBranch)
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}
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return db.WithTx(ctx, func(ctx context.Context) error {
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repo.DefaultWikiBranch = newBranch
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if err := repo_model.UpdateRepositoryColsNoAutoTime(ctx, repo, "default_wiki_branch"); err != nil {
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return fmt.Errorf("unable to update database: %w", err)
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}
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if !repo_service.HasWiki(ctx, repo) {
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return nil
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}
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oldDefBranch, err := gitrepo.GetDefaultBranch(ctx, repo.WikiStorageRepo())
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if err != nil {
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return fmt.Errorf("unable to get default branch: %w", err)
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}
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if oldDefBranch == newBranch {
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return nil
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}
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err = gitrepo.RenameBranch(ctx, repo.WikiStorageRepo(), oldDefBranch, newBranch)
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if err != nil {
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return fmt.Errorf("unable to rename default branch: %w", err)
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}
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return nil
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})
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}
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