forgejo/services/wiki/wiki.go
Gergely Nagy 2ca4862f8b
[GITEA] Allow changing the repo Wiki branch to main
Previously, the repo wiki was hardcoded to use `master` as its branch,
this change makes it possible to use `main` (or something else, governed
by `[repository].DEFAULT_BRANCH`, a setting that already exists and
defaults to `main`).

The way it is done is that a new column is added to the `repository`
table: `wiki_branch`. The migration will make existing repositories
default to `master`, for compatibility's sake, even if they don't have a
Wiki (because it's easier to do that). Newly created repositories will
default to `[repository].DEFAULT_BRANCH` instead.

The Wiki service was updated to use the branch name stored in the
database, and fall back to the default if it is empty.

Old repositories with Wikis using the older `master` branch will have
the option to do a one-time transition to `main`, available via the
repository settings in the "Danger Zone". This option will only be
available for repositories that have the internal wiki enabled, it is
not empty, and the wiki branch is not `[repository].DEFAULT_BRANCH`.

When migrating a repository with a Wiki, Forgejo will use the same
branch name for the wiki as the source repository did. If that's not the
same as the default, the option to normalize it will be available after
the migration's done.

Additionally, the `/api/v1/{owner}/{repo}` endpoint was updated: it will
now include the wiki branch name in `GET` requests, and allow changing
the wiki branch via `PATCH`.

Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
(cherry picked from commit d87c526d2a)
2024-02-05 16:57:47 +01:00

407 lines
11 KiB
Go

// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// Copyright 2024 The Forgejo Authors c/o Codeberg e.V.. All rights reserved.
// SPDX-License-Identifier: MIT
package wiki
import (
"context"
"fmt"
"os"
"strings"
repo_model "code.gitea.io/gitea/models/repo"
system_model "code.gitea.io/gitea/models/system"
"code.gitea.io/gitea/models/unit"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
repo_module "code.gitea.io/gitea/modules/repository"
"code.gitea.io/gitea/modules/sync"
asymkey_service "code.gitea.io/gitea/services/asymkey"
)
// TODO: use clustered lock (unique queue? or *abuse* cache)
var wikiWorkingPool = sync.NewExclusivePool()
const (
DefaultRemote = "origin"
)
// InitWiki initializes a wiki for repository,
// it does nothing when repository already has wiki.
func InitWiki(ctx context.Context, repo *repo_model.Repository) error {
if repo.HasWiki() {
return nil
}
branch := repo.GetWikiBranchName()
if err := git.InitRepository(ctx, repo.WikiPath(), true, repo.ObjectFormatName); err != nil {
return fmt.Errorf("InitRepository: %w", err)
} else if err = repo_module.CreateDelegateHooks(repo.WikiPath()); err != nil {
return fmt.Errorf("createDelegateHooks: %w", err)
} else if _, _, err = git.NewCommand(ctx, "symbolic-ref", "HEAD").AddDynamicArguments(git.BranchPrefix + branch).RunStdString(&git.RunOpts{Dir: repo.WikiPath()}); err != nil {
return fmt.Errorf("unable to set default wiki branch to %s: %w", branch, err)
}
return nil
}
// NormalizeWikiBranch renames a repository wiki's branch to `setting.Repository.DefaultBranch`
func NormalizeWikiBranch(ctx context.Context, repo *repo_model.Repository, to string) error {
from := repo.GetWikiBranchName()
if err := repo.MustNotBeArchived(); err != nil {
return err
}
updateDB := func() error {
repo.WikiBranch = to
return repo_model.UpdateRepositoryCols(ctx, repo, "wiki_branch")
}
if !repo.HasWiki() {
return updateDB()
}
if from == to {
return nil
}
gitRepo, err := git.OpenRepository(ctx, repo.WikiPath())
if err != nil {
return err
}
defer gitRepo.Close()
if gitRepo.IsBranchExist(to) {
return nil
}
if !gitRepo.IsBranchExist(from) {
return nil
}
if err := gitRepo.RenameBranch(from, to); err != nil {
return err
}
if err := gitRepo.SetDefaultBranch(to); err != nil {
return err
}
return updateDB()
}
// prepareGitPath try to find a suitable file path with file name by the given raw wiki name.
// return: existence, prepared file path with name, error
func prepareGitPath(gitRepo *git.Repository, branch string, wikiPath WebPath) (bool, string, error) {
unescaped := string(wikiPath) + ".md"
gitPath := WebPathToGitPath(wikiPath)
// Look for both files
filesInIndex, err := gitRepo.LsTree(branch, unescaped, gitPath)
if err != nil {
if strings.Contains(err.Error(), "Not a valid object name "+branch) {
return false, gitPath, nil
}
log.Error("%v", err)
return false, gitPath, err
}
foundEscaped := false
for _, filename := range filesInIndex {
switch filename {
case unescaped:
// if we find the unescaped file return it
return true, unescaped, nil
case gitPath:
foundEscaped = true
}
}
// If not return whether the escaped file exists, and the escaped filename to keep backwards compatibility.
return foundEscaped, gitPath, nil
}
// updateWikiPage adds a new page or edits an existing page in repository wiki.
func updateWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, oldWikiName, newWikiName WebPath, content, message string, isNew bool) (err error) {
err = repo.MustNotBeArchived()
if err != nil {
return err
}
if err = validateWebPath(newWikiName); err != nil {
return err
}
wikiWorkingPool.CheckIn(fmt.Sprint(repo.ID))
defer wikiWorkingPool.CheckOut(fmt.Sprint(repo.ID))
if err = InitWiki(ctx, repo); err != nil {
return fmt.Errorf("InitWiki: %w", err)
}
hasMasterBranch := git.IsBranchExist(ctx, repo.WikiPath(), repo.GetWikiBranchName())
basePath, err := repo_module.CreateTemporaryPath("update-wiki")
if err != nil {
return err
}
defer func() {
if err := repo_module.RemoveTemporaryPath(basePath); err != nil {
log.Error("Merge: RemoveTemporaryPath: %s", err)
}
}()
cloneOpts := git.CloneRepoOptions{
Bare: true,
Shared: true,
}
if hasMasterBranch {
cloneOpts.Branch = repo.GetWikiBranchName()
}
if err := git.Clone(ctx, repo.WikiPath(), basePath, cloneOpts); err != nil {
log.Error("Failed to clone repository: %s (%v)", repo.FullName(), err)
return fmt.Errorf("failed to clone repository: %s (%w)", repo.FullName(), err)
}
gitRepo, err := git.OpenRepository(ctx, basePath)
if err != nil {
log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
return fmt.Errorf("failed to open new temporary repository in: %s %w", basePath, err)
}
defer gitRepo.Close()
if hasMasterBranch {
if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
log.Error("Unable to read HEAD tree to index in: %s %v", basePath, err)
return fmt.Errorf("fnable to read HEAD tree to index in: %s %w", basePath, err)
}
}
isWikiExist, newWikiPath, err := prepareGitPath(gitRepo, repo.GetWikiBranchName(), newWikiName)
if err != nil {
return err
}
if isNew {
if isWikiExist {
return repo_model.ErrWikiAlreadyExist{
Title: newWikiPath,
}
}
} else {
// avoid check existence again if wiki name is not changed since gitRepo.LsFiles(...) is not free.
isOldWikiExist := true
oldWikiPath := newWikiPath
if oldWikiName != newWikiName {
isOldWikiExist, oldWikiPath, err = prepareGitPath(gitRepo, repo.GetWikiBranchName(), oldWikiName)
if err != nil {
return err
}
}
if isOldWikiExist {
err := gitRepo.RemoveFilesFromIndex(oldWikiPath)
if err != nil {
log.Error("%v", err)
return err
}
}
}
// FIXME: The wiki doesn't have lfs support at present - if this changes need to check attributes here
objectHash, err := gitRepo.HashObject(strings.NewReader(content))
if err != nil {
log.Error("%v", err)
return err
}
if err := gitRepo.AddObjectToIndex("100644", objectHash, newWikiPath); err != nil {
log.Error("%v", err)
return err
}
tree, err := gitRepo.WriteTree()
if err != nil {
log.Error("%v", err)
return err
}
commitTreeOpts := git.CommitTreeOpts{
Message: message,
}
committer := doer.NewGitSig()
sign, signingKey, signer, _ := asymkey_service.SignWikiCommit(ctx, repo, doer)
if sign {
commitTreeOpts.KeyID = signingKey
if repo.GetTrustModel() == repo_model.CommitterTrustModel || repo.GetTrustModel() == repo_model.CollaboratorCommitterTrustModel {
committer = signer
}
} else {
commitTreeOpts.NoGPGSign = true
}
if hasMasterBranch {
commitTreeOpts.Parents = []string{"HEAD"}
}
commitHash, err := gitRepo.CommitTree(doer.NewGitSig(), committer, tree, commitTreeOpts)
if err != nil {
log.Error("%v", err)
return err
}
if err := git.Push(gitRepo.Ctx, basePath, git.PushOptions{
Remote: DefaultRemote,
Branch: fmt.Sprintf("%s:%s%s", commitHash.String(), git.BranchPrefix, repo.GetWikiBranchName()),
Env: repo_module.FullPushingEnvironment(
doer,
doer,
repo,
repo.Name+".wiki",
0,
),
}); err != nil {
log.Error("%v", err)
if git.IsErrPushOutOfDate(err) || git.IsErrPushRejected(err) {
return err
}
return fmt.Errorf("Push: %w", err)
}
return nil
}
// AddWikiPage adds a new wiki page with a given wikiPath.
func AddWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, wikiName WebPath, content, message string) error {
return updateWikiPage(ctx, doer, repo, "", wikiName, content, message, true)
}
// EditWikiPage updates a wiki page identified by its wikiPath,
// optionally also changing wikiPath.
func EditWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, oldWikiName, newWikiName WebPath, content, message string) error {
return updateWikiPage(ctx, doer, repo, oldWikiName, newWikiName, content, message, false)
}
// DeleteWikiPage deletes a wiki page identified by its path.
func DeleteWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, wikiName WebPath) (err error) {
err = repo.MustNotBeArchived()
if err != nil {
return err
}
wikiWorkingPool.CheckIn(fmt.Sprint(repo.ID))
defer wikiWorkingPool.CheckOut(fmt.Sprint(repo.ID))
if err = InitWiki(ctx, repo); err != nil {
return fmt.Errorf("InitWiki: %w", err)
}
basePath, err := repo_module.CreateTemporaryPath("update-wiki")
if err != nil {
return err
}
defer func() {
if err := repo_module.RemoveTemporaryPath(basePath); err != nil {
log.Error("Merge: RemoveTemporaryPath: %s", err)
}
}()
if err := git.Clone(ctx, repo.WikiPath(), basePath, git.CloneRepoOptions{
Bare: true,
Shared: true,
Branch: repo.GetWikiBranchName(),
}); err != nil {
log.Error("Failed to clone repository: %s (%v)", repo.FullName(), err)
return fmt.Errorf("failed to clone repository: %s (%w)", repo.FullName(), err)
}
gitRepo, err := git.OpenRepository(ctx, basePath)
if err != nil {
log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
return fmt.Errorf("failed to open new temporary repository in: %s %w", basePath, err)
}
defer gitRepo.Close()
if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
log.Error("Unable to read HEAD tree to index in: %s %v", basePath, err)
return fmt.Errorf("unable to read HEAD tree to index in: %s %w", basePath, err)
}
found, wikiPath, err := prepareGitPath(gitRepo, repo.GetWikiBranchName(), wikiName)
if err != nil {
return err
}
if found {
err := gitRepo.RemoveFilesFromIndex(wikiPath)
if err != nil {
return err
}
} else {
return os.ErrNotExist
}
// FIXME: The wiki doesn't have lfs support at present - if this changes need to check attributes here
tree, err := gitRepo.WriteTree()
if err != nil {
return err
}
message := fmt.Sprintf("Delete page %q", wikiName)
commitTreeOpts := git.CommitTreeOpts{
Message: message,
Parents: []string{"HEAD"},
}
committer := doer.NewGitSig()
sign, signingKey, signer, _ := asymkey_service.SignWikiCommit(ctx, repo, doer)
if sign {
commitTreeOpts.KeyID = signingKey
if repo.GetTrustModel() == repo_model.CommitterTrustModel || repo.GetTrustModel() == repo_model.CollaboratorCommitterTrustModel {
committer = signer
}
} else {
commitTreeOpts.NoGPGSign = true
}
commitHash, err := gitRepo.CommitTree(doer.NewGitSig(), committer, tree, commitTreeOpts)
if err != nil {
return err
}
if err := git.Push(gitRepo.Ctx, basePath, git.PushOptions{
Remote: DefaultRemote,
Branch: fmt.Sprintf("%s:%s%s", commitHash.String(), git.BranchPrefix, repo.GetWikiBranchName()),
Env: repo_module.FullPushingEnvironment(
doer,
doer,
repo,
repo.Name+".wiki",
0,
),
}); err != nil {
if git.IsErrPushOutOfDate(err) || git.IsErrPushRejected(err) {
return err
}
return fmt.Errorf("Push: %w", err)
}
return nil
}
// DeleteWiki removes the actual and local copy of repository wiki.
func DeleteWiki(ctx context.Context, repo *repo_model.Repository) error {
if err := repo_model.UpdateRepositoryUnits(ctx, repo, nil, []unit.Type{unit.TypeWiki}); err != nil {
return err
}
system_model.RemoveAllWithNotice(ctx, "Delete repository wiki", repo.WikiPath())
return nil
}