385 lines
11 KiB
Go
385 lines
11 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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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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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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"net/url"
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"os"
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"strings"
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"code.gitea.io/gitea/models"
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admin_model "code.gitea.io/gitea/models/admin"
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repo_model "code.gitea.io/gitea/models/repo"
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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/log"
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repo_module "code.gitea.io/gitea/modules/repository"
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"code.gitea.io/gitea/modules/sync"
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"code.gitea.io/gitea/modules/util"
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asymkey_service "code.gitea.io/gitea/services/asymkey"
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)
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var (
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reservedWikiNames = []string{"_pages", "_new", "_edit", "raw"}
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wikiWorkingPool = sync.NewExclusivePool()
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)
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func nameAllowed(name string) error {
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if util.IsStringInSlice(name, reservedWikiNames) {
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return models.ErrWikiReservedName{
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Title: name,
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}
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}
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return nil
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}
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// NameToSubURL converts a wiki name to its corresponding sub-URL.
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func NameToSubURL(name string) string {
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return url.PathEscape(strings.ReplaceAll(name, " ", "-"))
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}
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// NormalizeWikiName normalizes a wiki name
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func NormalizeWikiName(name string) string {
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return strings.ReplaceAll(name, "-", " ")
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}
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// NameToFilename converts a wiki name to its corresponding filename.
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func NameToFilename(name string) string {
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name = strings.ReplaceAll(name, " ", "-")
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return url.QueryEscape(name) + ".md"
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}
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// FilenameToName converts a wiki filename to its corresponding page name.
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func FilenameToName(filename string) (string, error) {
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if !strings.HasSuffix(filename, ".md") {
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return "", models.ErrWikiInvalidFileName{
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FileName: filename,
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}
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}
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basename := filename[:len(filename)-3]
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unescaped, err := url.QueryUnescape(basename)
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if err != nil {
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return "", err
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}
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return NormalizeWikiName(unescaped), nil
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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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if repo.HasWiki() {
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return nil
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}
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if err := git.InitRepository(ctx, repo.WikiPath(), true); err != nil {
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return fmt.Errorf("InitRepository: %v", err)
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} else if err = repo_module.CreateDelegateHooks(repo.WikiPath()); err != nil {
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return fmt.Errorf("createDelegateHooks: %v", err)
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} else if _, _, err = git.NewCommand(ctx, "symbolic-ref", "HEAD", git.BranchPrefix+"master").RunStdString(&git.RunOpts{Dir: repo.WikiPath()}); err != nil {
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return fmt.Errorf("unable to set default wiki branch to master: %v", err)
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}
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return nil
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}
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// prepareWikiFileName 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 prepareWikiFileName(gitRepo *git.Repository, wikiName string) (bool, string, error) {
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unescaped := wikiName + ".md"
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escaped := NameToFilename(wikiName)
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// Look for both files
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filesInIndex, err := gitRepo.LsTree("master", unescaped, escaped)
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if err != nil {
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if strings.Contains(err.Error(), "Not a valid object name master") {
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return false, escaped, nil
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}
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log.Error("%v", err)
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return false, escaped, 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 escaped:
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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, escaped, nil
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}
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// updateWikiPage adds a new page to the repository wiki.
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func updateWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, oldWikiName, newWikiName, content, message string, isNew bool) (err error) {
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if err = nameAllowed(newWikiName); err != nil {
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return err
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}
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wikiWorkingPool.CheckIn(fmt.Sprint(repo.ID))
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defer wikiWorkingPool.CheckOut(fmt.Sprint(repo.ID))
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if err = InitWiki(ctx, repo); err != nil {
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return fmt.Errorf("InitWiki: %v", err)
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}
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hasMasterBranch := git.IsBranchExist(ctx, repo.WikiPath(), "master")
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basePath, err := models.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 func() {
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if err := models.RemoveTemporaryPath(basePath); err != nil {
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log.Error("Merge: RemoveTemporaryPath: %s", err)
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}
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}()
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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 hasMasterBranch {
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cloneOpts.Branch = "master"
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}
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if err := git.Clone(ctx, repo.WikiPath(), 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 (%v)", 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 %v", basePath, err)
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}
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defer gitRepo.Close()
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if hasMasterBranch {
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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 %v", basePath, err)
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}
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}
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isWikiExist, newWikiPath, err := prepareWikiFileName(gitRepo, 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 models.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 = prepareWikiFileName(gitRepo, 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("%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.HashObject(strings.NewReader(content))
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if err != nil {
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log.Error("%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("%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("%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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sign, signingKey, signer, _ := asymkey_service.SignWikiCommit(ctx, repo.WikiPath(), doer)
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if sign {
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commitTreeOpts.KeyID = 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 hasMasterBranch {
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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("%v", err)
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return err
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}
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if err := git.Push(gitRepo.Ctx, basePath, git.PushOptions{
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Remote: "origin",
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Branch: fmt.Sprintf("%s:%s%s", commitHash.String(), git.BranchPrefix, "master"),
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Env: models.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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),
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}); err != nil {
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log.Error("%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("Push: %v", 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, 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, 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 string) (err error) {
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wikiWorkingPool.CheckIn(fmt.Sprint(repo.ID))
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defer wikiWorkingPool.CheckOut(fmt.Sprint(repo.ID))
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if err = InitWiki(ctx, repo); err != nil {
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return fmt.Errorf("InitWiki: %v", err)
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}
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basePath, err := models.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 func() {
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if err := models.RemoveTemporaryPath(basePath); err != nil {
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log.Error("Merge: RemoveTemporaryPath: %s", err)
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}
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}()
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if err := git.Clone(ctx, repo.WikiPath(), basePath, git.CloneRepoOptions{
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Bare: true,
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Shared: true,
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Branch: "master",
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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 (%v)", 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 %v", 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 %v", basePath, err)
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}
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found, wikiPath, err := prepareWikiFileName(gitRepo, 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 := "Delete page '" + 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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sign, signingKey, signer, _ := asymkey_service.SignWikiCommit(ctx, repo.WikiPath(), doer)
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if sign {
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commitTreeOpts.KeyID = 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 := git.Push(gitRepo.Ctx, basePath, git.PushOptions{
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Remote: "origin",
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Branch: fmt.Sprintf("%s:%s%s", commitHash.String(), git.BranchPrefix, "master"),
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Env: models.PushingEnvironment(doer, repo),
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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: %v", 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_model.UpdateRepositoryUnits(repo, nil, []unit.Type{unit.TypeWiki}); err != nil {
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return err
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}
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admin_model.RemoveAllWithNotice(ctx, "Delete repository wiki", repo.WikiPath())
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return nil
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}
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