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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"
"os"
"path"
"path/filepath"
"strings"
"sync"
"github.com/Unknwon/com"
"github.com/gogits/git-shell"
"github.com/gogits/gogs/modules/setting"
)
// workingPool represents a pool of working status which makes sure
// that only one instance of same task is performing at a time.
// However, different type of tasks can performing at the same time.
type workingPool struct {
lock sync.Mutex
pool map[string]*sync.Mutex
count map[string]int
}
// CheckIn checks in a task and waits if others are running.
func (p *workingPool) CheckIn(name string) {
p.lock.Lock()
lock, has := p.pool[name]
if !has {
lock = &sync.Mutex{}
p.pool[name] = lock
}
p.count[name]++
p.lock.Unlock()
lock.Lock()
}
// CheckOut checks out a task to let other tasks run.
func (p *workingPool) CheckOut(name string) {
p.lock.Lock()
defer p.lock.Unlock()
p.pool[name].Unlock()
if p.count[name] == 1 {
delete(p.pool, name)
delete(p.count, name)
} else {
p.count[name]--
}
}
var wikiWorkingPool = &workingPool{
pool: make(map[string]*sync.Mutex),
count: make(map[string]int),
}
// ToWikiPageURL formats a string to corresponding wiki URL name.
func ToWikiPageURL(name string) string {
return strings.Replace(name, " ", "-", -1)
}
// ToWikiPageName formats a URL back to corresponding wiki page name.
func ToWikiPageName(name string) string {
return strings.Replace(name, "-", " ", -1)
}
// WikiCloneLink returns clone URLs of repository wiki.
func (repo *Repository) WikiCloneLink() (cl *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")
}
func (repo *Repository) WikiPath() string {
return WikiPath(repo.MustOwner().Name, 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)
}
return nil
}
func (repo *Repository) LocalWikiPath() string {
return path.Join(setting.AppDataPath, "tmp/local-wiki", com.ToStr(repo.ID))
}
// UpdateLocalWiki makes sure the local copy of repository wiki is up-to-date.
func (repo *Repository) UpdateLocalWiki() error {
return updateLocalCopy(repo.WikiPath(), repo.LocalWikiPath())
}
// updateWikiPage adds new page to repository wiki.
func (repo *Repository) updateWikiPage(doer *User, oldTitle, title, content, message string, isNew bool) (err error) {
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()
// Discard local commits make sure even to remote when local copy exists.
if com.IsExist(localPath) {
// No need to check if nothing in the repository.
if git.IsBranchExist(localPath, "master") {
if err = git.ResetHEAD(localPath, true, "origin/master"); err != nil {
return fmt.Errorf("Reset: %v", err)
}
}
}
if err = repo.UpdateLocalWiki(); err != nil {
return fmt.Errorf("UpdateLocalWiki: %v", err)
}
title = ToWikiPageName(strings.Replace(title, "/", " ", -1))
filename := path.Join(localPath, title+".md")
// If not a new file, show perform update not create.
if isNew {
if com.IsExist(filename) {
return ErrWikiAlreadyExist{filename}
}
} else {
os.Remove(path.Join(localPath, oldTitle+".md"))
}
if err = ioutil.WriteFile(filename, []byte(content), 0666); err != nil {
return fmt.Errorf("WriteFile: %v", err)
}
if len(message) == 0 {
message = "Update page '" + title + "'"
}
if err = git.AddChanges(localPath, true); err != nil {
return fmt.Errorf("AddChanges: %v", err)
} else if err = git.CommitChanges(localPath, message, doer.NewGitSig()); err != nil {
return fmt.Errorf("CommitChanges: %v", err)
} else if err = git.Push(localPath, "origin", "master"); err != nil {
return fmt.Errorf("Push: %v", err)
}
return nil
}
func (repo *Repository) AddWikiPage(doer *User, title, content, message string) error {
return repo.updateWikiPage(doer, "", title, content, message, true)
}
func (repo *Repository) EditWikiPage(doer *User, oldTitle, title, content, message string) error {
return repo.updateWikiPage(doer, oldTitle, title, content, message, false)
}
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