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wiki.go
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wiki.go
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// Copyright 2015 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package models
import (
"fmt"
"io/ioutil"
"net/url"
"os"
"path"
"path/filepath"
"strings"
"github.com/Unknwon/com"
"code.gitea.io/git"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/sync"
)
var (
reservedWikiNames = []string{"_pages", "_new", "_edit"}
wikiWorkingPool = sync.NewExclusivePool()
)
// NormalizeWikiName normalizes a wiki name
func NormalizeWikiName(name string) string {
return strings.Replace(name, "-", " ", -1)
}
// WikiNameToSubURL converts a wiki name to its corresponding sub-URL.
func WikiNameToSubURL(name string) string {
return url.QueryEscape(strings.Replace(name, " ", "-", -1))
}
// WikiNameToFilename converts a wiki name to its corresponding filename.
func WikiNameToFilename(name string) string {
name = strings.Replace(name, " ", "-", -1)
return url.QueryEscape(name) + ".md"
}
// WikiFilenameToName converts a wiki filename to its corresponding page name.
func WikiFilenameToName(filename string) (string, error) {
if !strings.HasSuffix(filename, ".md") {
return "", ErrWikiInvalidFileName{filename}
}
basename := filename[:len(filename)-3]
unescaped, err := url.QueryUnescape(basename)
if err != nil {
return "", err
}
return NormalizeWikiName(unescaped), nil
}
// WikiCloneLink returns clone URLs of repository wiki.
func (repo *Repository) WikiCloneLink() *CloneLink {
return repo.cloneLink(true)
}
// WikiPath returns wiki data path by given user and repository name.
func WikiPath(userName, repoName string) string {
return filepath.Join(UserPath(userName), strings.ToLower(repoName)+".wiki.git")
}
// WikiPath returns wiki data path for given repository.
func (repo *Repository) WikiPath() string {
return WikiPath(repo.MustOwnerName(), repo.Name)
}
// HasWiki returns true if repository has wiki.
func (repo *Repository) HasWiki() bool {
return com.IsDir(repo.WikiPath())
}
// InitWiki initializes a wiki for repository,
// it does nothing when repository already has wiki.
func (repo *Repository) InitWiki() error {
if repo.HasWiki() {
return nil
}
if err := git.InitRepository(repo.WikiPath(), true); err != nil {
return fmt.Errorf("InitRepository: %v", err)
} else if err = createDelegateHooks(repo.WikiPath()); err != nil {
return fmt.Errorf("createDelegateHooks: %v", err)
}
return nil
}
// LocalWikiPath returns the local wiki repository copy path.
func LocalWikiPath() string {
if filepath.IsAbs(setting.Repository.Local.LocalWikiPath) {
return setting.Repository.Local.LocalWikiPath
}
return path.Join(setting.AppDataPath, setting.Repository.Local.LocalWikiPath)
}
// LocalWikiPath returns the path to the local wiki repository (?).
func (repo *Repository) LocalWikiPath() string {
return path.Join(LocalWikiPath(), com.ToStr(repo.ID))
}
// UpdateLocalWiki makes sure the local copy of repository wiki is up-to-date.
func (repo *Repository) updateLocalWiki() error {
// Don't pass branch name here because it fails to clone and
// checkout to a specific branch when wiki is an empty repository.
var branch = ""
if com.IsExist(repo.LocalWikiPath()) {
branch = "master"
}
return UpdateLocalCopyBranch(repo.WikiPath(), repo.LocalWikiPath(), branch)
}
func discardLocalWikiChanges(localPath string) error {
return discardLocalRepoBranchChanges(localPath, "master")
}
// nameAllowed checks if a wiki name is allowed
func nameAllowed(name string) error {
for _, reservedName := range reservedWikiNames {
if name == reservedName {
return ErrWikiReservedName{name}
}
}
return nil
}
// updateWikiPage adds a new page to the repository wiki.
func (repo *Repository) updateWikiPage(doer *User, oldWikiName, newWikiName, content, message string, isNew bool) (err error) {
if err = nameAllowed(newWikiName); err != nil {
return err
}
wikiWorkingPool.CheckIn(com.ToStr(repo.ID))
defer wikiWorkingPool.CheckOut(com.ToStr(repo.ID))
if err = repo.InitWiki(); err != nil {
return fmt.Errorf("InitWiki: %v", err)
}
localPath := repo.LocalWikiPath()
if err = discardLocalWikiChanges(localPath); err != nil {
return fmt.Errorf("discardLocalWikiChanges: %v", err)
} else if err = repo.updateLocalWiki(); err != nil {
return fmt.Errorf("UpdateLocalWiki: %v", err)
}
newWikiPath := path.Join(localPath, WikiNameToFilename(newWikiName))
// If not a new file, show perform update not create.
if isNew {
if com.IsExist(newWikiPath) {
return ErrWikiAlreadyExist{newWikiPath}
}
} else {
oldWikiPath := path.Join(localPath, WikiNameToFilename(oldWikiName))
if err := os.Remove(oldWikiPath); err != nil {
return fmt.Errorf("Failed to remove %s: %v", oldWikiPath, err)
}
}
// SECURITY: if new file is a symlink to non-exist critical file,
// attack content can be written to the target file (e.g. authorized_keys2)
// as a new page operation.
// So we want to make sure the symlink is removed before write anything.
// The new file we created will be in normal text format.
if err = os.RemoveAll(newWikiPath); err != nil {
return err
}
if err = ioutil.WriteFile(newWikiPath, []byte(content), 0666); err != nil {
return fmt.Errorf("WriteFile: %v", err)
}
if len(message) == 0 {
message = "Update page '" + newWikiName + "'"
}
if err = git.AddChanges(localPath, true); err != nil {
return fmt.Errorf("AddChanges: %v", err)
} else if err = git.CommitChanges(localPath, git.CommitChangesOptions{
Committer: doer.NewGitSig(),
Message: message,
}); err != nil {
return fmt.Errorf("CommitChanges: %v", err)
} else if err = git.Push(localPath, git.PushOptions{
Remote: "origin",
Branch: "master",
}); err != nil {
return fmt.Errorf("Push: %v", err)
}
return nil
}
// AddWikiPage adds a new wiki page with a given wikiPath.
func (repo *Repository) AddWikiPage(doer *User, wikiName, content, message string) error {
return repo.updateWikiPage(doer, "", wikiName, content, message, true)
}
// EditWikiPage updates a wiki page identified by its wikiPath,
// optionally also changing wikiPath.
func (repo *Repository) EditWikiPage(doer *User, oldWikiName, newWikiName, content, message string) error {
return repo.updateWikiPage(doer, oldWikiName, newWikiName, content, message, false)
}
// DeleteWikiPage deletes a wiki page identified by its path.
func (repo *Repository) DeleteWikiPage(doer *User, wikiName string) (err error) {
wikiWorkingPool.CheckIn(com.ToStr(repo.ID))
defer wikiWorkingPool.CheckOut(com.ToStr(repo.ID))
localPath := repo.LocalWikiPath()
if err = discardLocalWikiChanges(localPath); err != nil {
return fmt.Errorf("discardLocalWikiChanges: %v", err)
} else if err = repo.updateLocalWiki(); err != nil {
return fmt.Errorf("UpdateLocalWiki: %v", err)
}
filename := path.Join(localPath, WikiNameToFilename(wikiName))
if err := os.Remove(filename); err != nil {
return fmt.Errorf("Failed to remove %s: %v", filename, err)
}
message := "Delete page '" + wikiName + "'"
if err = git.AddChanges(localPath, true); err != nil {
return fmt.Errorf("AddChanges: %v", err)
} else if err = git.CommitChanges(localPath, git.CommitChangesOptions{
Committer: doer.NewGitSig(),
Message: message,
}); err != nil {
return fmt.Errorf("CommitChanges: %v", err)
} else if err = git.Push(localPath, git.PushOptions{
Remote: "origin",
Branch: "master",
}); err != nil {
return fmt.Errorf("Push: %v", err)
}
return nil
}