Redirects for renamed repos (#807)

* Redirects for renamed repos

* Remove unused phrase from locales

models/error.go

@@ -408,6 +408,22 @@ func (err ErrRepoAlreadyExist) Error() string {
 	return fmt.Sprintf("repository already exists [uname: %s, name: %s]", err.Uname, err.Name)
 }
 
+// ErrRepoRedirectNotExist represents a "RepoRedirectNotExist" kind of error.
+type ErrRepoRedirectNotExist struct {
+	OwnerID int64
+	RepoName string
+}
+
+// IsErrRepoRedirectNotExist check if an error is an ErrRepoRedirectNotExist
+func IsErrRepoRedirectNotExist(err error) bool {
+	_, ok := err.(ErrRepoRedirectNotExist)
+	return ok
+}
+
+func (err ErrRepoRedirectNotExist) Error() string {
+	return fmt.Sprintf("repository redirect does not exist [uid: %d, name: %s]", err.OwnerID, err.RepoName)
+}
+
 // ErrInvalidCloneAddr represents a "InvalidCloneAddr" kind of error.
 type ErrInvalidCloneAddr struct {
 	IsURLError         bool

models/models.go

@@ -109,6 +109,7 @@ func init() {
 		new(LFSMetaObject),
 		new(TwoFactor),
 		new(RepoUnit),
+		new(RepoRedirect),
 	)
 
 	gonicNames := []string{"SSL", "UID"}

models/repo.go

@@ -1054,6 +1054,9 @@ func createRepository(e *xorm.Session, u *User, repo *Repository) (err error) {
 	if _, err = e.Insert(repo); err != nil {
 		return err
 	}
+	if err = deleteRepoRedirect(e, u.ID, repo.Name); err != nil {
+		return err
+	}
 
 	// insert units for repo
 	var units = make([]RepoUnit, 0, len(defaultRepoUnits))

models/repo_redirect.go

@@ -0,0 +1,62 @@
+// Copyright 2017 The Gitea 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 "strings"
+
+// RepoRedirect represents that a repo name should be redirected to another
+type RepoRedirect struct {
+	ID             int64  `xorm:"pk autoincr"`
+	OwnerID        int64  `xorm:"UNIQUE(s)"`
+	LowerName      string `xorm:"UNIQUE(s) INDEX NOT NULL"`
+	RedirectRepoID int64  // repoID to redirect to
+}
+
+// LookupRepoRedirect look up if a repository has a redirect name
+func LookupRepoRedirect(ownerID int64, repoName string) (int64, error) {
+	repoName = strings.ToLower(repoName)
+	redirect := &RepoRedirect{OwnerID: ownerID, LowerName: repoName}
+	if has, err := x.Get(redirect); err != nil {
+		return 0, err
+	} else if !has {
+		return 0, ErrRepoRedirectNotExist{OwnerID: ownerID, RepoName: repoName}
+	}
+	return redirect.RedirectRepoID, nil
+}
+
+// NewRepoRedirect create a new repo redirect
+func NewRepoRedirect(ownerID, repoID int64, oldRepoName, newRepoName string) error {
+	oldRepoName = strings.ToLower(oldRepoName)
+	newRepoName = strings.ToLower(newRepoName)
+	sess := x.NewSession()
+	defer sess.Close()
+
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if err := deleteRepoRedirect(sess, ownerID, newRepoName); err != nil {
+		sess.Rollback()
+		return err
+	}
+
+	if _, err := sess.Insert(&RepoRedirect{
+		OwnerID:        ownerID,
+		LowerName:      oldRepoName,
+		RedirectRepoID: repoID,
+	}); err != nil {
+		sess.Rollback()
+		return err
+	}
+	return sess.Commit()
+}
+
+// deleteRepoRedirect delete any redirect from the specified repo name to
+// anything else
+func deleteRepoRedirect(e Engine, ownerID int64, repoName string) error {
+	repoName = strings.ToLower(repoName)
+	_, err := e.Delete(&RepoRedirect{OwnerID: ownerID, LowerName: repoName})
+	return err
+}

modules/context/repo.go

@@ -133,6 +133,26 @@ func earlyResponseForGoGetMeta(ctx *Context) {
 		})))
 }
 
+// RedirectToRepo redirect to a differently-named repository
+func RedirectToRepo(ctx *Context, redirectRepoID int64) {
+	ownerName := ctx.Params(":username")
+	previousRepoName := ctx.Params(":reponame")
+
+	repo, err := models.GetRepositoryByID(redirectRepoID)
+	if err != nil {
+		ctx.Handle(500, "GetRepositoryByID", err)
+		return
+	}
+
+	redirectPath := strings.Replace(
+		ctx.Req.URL.Path,
+		fmt.Sprintf("%s/%s", ownerName, previousRepoName),
+		fmt.Sprintf("%s/%s", ownerName, repo.Name),
+		1,
+	)
+	ctx.Redirect(redirectPath)
+}
+
 // RepoAssignment returns a macaron to handle repository assignment
 func RepoAssignment(args ...bool) macaron.Handler {
 	return func(ctx *Context) {
@@ -176,11 +196,18 @@ func RepoAssignment(args ...bool) macaron.Handler {
 		repo, err := models.GetRepositoryByName(owner.ID, repoName)
 		if err != nil {
 			if models.IsErrRepoNotExist(err) {
-				if ctx.Query("go-get") == "1" {
-					earlyResponseForGoGetMeta(ctx)
-					return
+				redirectRepoID, err := models.LookupRepoRedirect(owner.ID, repoName)
+				if err == nil {
+					RedirectToRepo(ctx, redirectRepoID)
+				} else if models.IsErrRepoRedirectNotExist(err) {
+					if ctx.Query("go-get") == "1" {
+						earlyResponseForGoGetMeta(ctx)
+						return
+					}
+					ctx.Handle(404, "GetRepositoryByName", err)
+				} else {
+					ctx.Handle(500, "LookupRepoRedirect", err)
 				}
-				ctx.Handle(404, "GetRepositoryByName", err)
 			} else {
 				ctx.Handle(500, "GetRepositoryByName", err)
 			}

options/locale/locale_bg-BG.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Синхр. сега
 settings.mirror_sync_in_progress=Синхронизация на огледалото е в ход, моля обновете страницата след минута.
 settings.site=Официален сайт
 settings.update_settings=Запази настройките
-settings.change_reponame_prompt=Тази промяна ще засегне връзките, които се отнасят до това хранилището.
 settings.advanced_settings=Разширени настройки
 settings.wiki_desc=Включи система за уики
 settings.use_internal_wiki=Използвай вградено уики

options/locale/locale_cs-CZ.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Provést synchronizaci
 settings.mirror_sync_in_progress=Synchronizace zrcadel probíhá, prosím načtěte znovu stránku přibližně za minutu.
 settings.site=Oficiální stránky
 settings.update_settings=Změnit nastavení
-settings.change_reponame_prompt=Tato změna ovlivní vztah odkazů k repositáři.
 settings.advanced_settings=Pokročilá nastavení
 settings.wiki_desc=Povolit systém Wiki
 settings.use_internal_wiki=Použít vestavěný systém Wiki

options/locale/locale_de-DE.ini

@@ -643,7 +643,6 @@ settings.sync_mirror=Jetzt synchronisieren
 settings.mirror_sync_in_progress=Mirror Synchronisierung läuft, bitte die Seite in ca. einer Minute neu laden.
 settings.site=Offizielle Webseite
 settings.update_settings=Einstellungen speichern
-settings.change_reponame_prompt=Diese Änderung wirkt sich darauf aus, wie sich Links auf Repositories beziehen.
 settings.advanced_settings=Erweiterte Einstellungen
 settings.wiki_desc=Wiki einschalten
 settings.use_internal_wiki=Eingebautes Wiki verwenden

options/locale/locale_en-US.ini

@@ -699,7 +699,6 @@ settings.sync_mirror = Sync Now
 settings.mirror_sync_in_progress = Mirror syncing is in progress, please refresh page in about a minute.
 settings.site = Official Site
 settings.update_settings = Update Settings
-settings.change_reponame_prompt = This change will affect how links relate to the repository.
 settings.advanced_settings = Advanced Settings
 settings.wiki_desc = Enable wiki system
 settings.use_internal_wiki = Use builtin wiki

options/locale/locale_es-ES.ini

@@ -637,7 +637,6 @@ settings.sync_mirror=Sincronizar ahora
 settings.mirror_sync_in_progress=Sincronización de réplica en curso, por favor actualice la página en unos minutos.
 settings.site=Sitio oficial
 settings.update_settings=Actualizar configuración
-settings.change_reponame_prompt=Este cambio afectará a los enlaces al repositorio.
 settings.advanced_settings=Ajustes avanzados
 settings.wiki_desc=Activar sistema de wiki
 settings.use_internal_wiki=Usar wiki integrada

options/locale/locale_fi-FI.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Sync Now
 settings.mirror_sync_in_progress=Mirror syncing is in progress, please refresh page in about a minute.
 settings.site=Virallinen sivusto
 settings.update_settings=Päivitä asetukset
-settings.change_reponame_prompt=Tämä muutos vaikuttaa siihen miten linkit liittyvät repoon.
 settings.advanced_settings=Lisäasetukset
 settings.wiki_desc=Enable wiki system
 settings.use_internal_wiki=Use builtin wiki

options/locale/locale_fr-FR.ini

@@ -637,7 +637,6 @@ settings.sync_mirror=Synchroniser maintenant
 settings.mirror_sync_in_progress=Synchronisation du miroir en cours, merci de rafraîchir la page dans une minute environ.
 settings.site=Site officiel
 settings.update_settings=Valider
-settings.change_reponame_prompt=Ce changement affectera comment les liens sont reliés avec le dépôt.
 settings.advanced_settings=Paramètres avancés
 settings.wiki_desc=Activer le wiki
 settings.use_internal_wiki=Utiliser le wiki interne

options/locale/locale_it-IT.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Sync Now
 settings.mirror_sync_in_progress=Mirror syncing is in progress, please refresh page in about a minute.
 settings.site=Sito Ufficiale
 settings.update_settings=Aggiorna Impostazioni
-settings.change_reponame_prompt=Questa modifica influirà i link al repository.
 settings.advanced_settings=Opzioni avanzate
 settings.wiki_desc=Enable wiki system
 settings.use_internal_wiki=Use builtin wiki

options/locale/locale_ja-JP.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=今すぐ同期
 settings.mirror_sync_in_progress=Mirror syncing is in progress, please refresh page in about a minute.
 settings.site=公式サイト
 settings.update_settings=設定の更新
-settings.change_reponame_prompt=この変更はリンクがリポジトリに関連付ける方法に影響します。
 settings.advanced_settings=拡張設定
 settings.wiki_desc=Enable wiki system
 settings.use_internal_wiki=Use builtin wiki

options/locale/locale_ko-KR.ini

@@ -637,7 +637,6 @@ settings.sync_mirror=지금 동기화
 settings.mirror_sync_in_progress=미러 동기화 진행 중입니다. 약 1분 뒤에 페이지를 새로 고침 하세요.
 settings.site=공식 사이트
 settings.update_settings=설정 저장
-settings.change_reponame_prompt=이 변경은 이 저장소와 연관된 링크들에 영향을 줄 것입니다.
 settings.advanced_settings=고급 설정
 settings.wiki_desc=위키 시스템 활성화
 settings.use_internal_wiki=내장 위키 사용

options/locale/locale_lv-LV.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Sinhronizēt tagad
 settings.mirror_sync_in_progress=Notiek spoguļa sinhronizācija, uzgaidiet aptuveni minūti un atjaunojiet lapu.
 settings.site=Oficiālā mājas lapa
 settings.update_settings=Mainīt iestatījumus
-settings.change_reponame_prompt=Šī izmaiņa ietekmēs saites, kas ir saistītas ar šo repozitoriju.
 settings.advanced_settings=Papildu iestatījumi
 settings.wiki_desc=Iespējot vikivietnes
 settings.use_internal_wiki=Izmantot iebūvēto vikivietni

options/locale/locale_nl-NL.ini

@@ -637,7 +637,6 @@ settings.sync_mirror=Sync Now
 settings.mirror_sync_in_progress=Kopie synchronisatie is bezig, vernieuw de pagina over ongeveer een minuut.
 settings.site=Officiële site
 settings.update_settings=Instellingen bewerken
-settings.change_reponame_prompt=Deze verandering zal gevolgen hebben voor hoe links zich verhouden tot de repository.
 settings.advanced_settings=Geavanceerde opties
 settings.wiki_desc=Enable wiki system
 settings.use_internal_wiki=Use builtin wiki

options/locale/locale_pl-PL.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Synchronizuj teraz
 settings.mirror_sync_in_progress=Synchronizacja kopii lustrzanej jest w toku, odśwież stronę w ciągu minuty.
 settings.site=Oficjalna Strona
 settings.update_settings=Aktualizuj ustawienia
-settings.change_reponame_prompt=Zmiana nazwy repozytorium wpłynie na linki do niego.
 settings.advanced_settings=Ustawienia zaawansowane
 settings.wiki_desc=Włącz system wiki
 settings.use_internal_wiki=Użyj wbudowanego wiki

options/locale/locale_pt-BR.ini

@@ -637,7 +637,6 @@ settings.sync_mirror=Sincronizar agora
 settings.mirror_sync_in_progress=A sincronização do mirror está em andamento, por favor atualize a página em aproximadamente um minuto.
 settings.site=Site oficial
 settings.update_settings=Atualizar configurações
-settings.change_reponame_prompt=Esta mudança irá afetar os links para este repositório.
 settings.advanced_settings=Configurações avançadas
 settings.wiki_desc=Habilitar sistema de wiki
 settings.use_internal_wiki=Usar wiki nativa

options/locale/locale_ru-RU.ini

@@ -644,7 +644,6 @@ settings.sync_mirror=Синхронизировать
 settings.mirror_sync_in_progress=Выполняется синхронизация Зеркала, пожалуйста, обновите эту страницу через минуту.
 settings.site=Официальный сайт
 settings.update_settings=Обновить настройки
-settings.change_reponame_prompt=Это изменение повлияет на отношения ссылок к этому репозиторию.
 settings.advanced_settings=Расширенные настройки
 settings.wiki_desc=Включить систему Wiki
 settings.use_internal_wiki=Использовать встроенную wiki

options/locale/locale_sr-SP.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Изврши синхронизацију сада
 settings.mirror_sync_in_progress=Синхронизација је у току, молимо вас да освежите страницу ускоро.
 settings.site=Званични сајт
 settings.update_settings=Примени промене
-settings.change_reponame_prompt=Ова промена ће утицати на однос линкова на спремиште.
 settings.advanced_settings=Напредна подешавања
 settings.wiki_desc=Омогући систем вики
 settings.use_internal_wiki=Користи уграђен вики

options/locale/locale_sv-SE.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Synkronisera nu
 settings.mirror_sync_in_progress=Spegningssynkronisering pågår, vänligen ladda om sidan om cirka en minut.
 settings.site=Officiell webbplats
 settings.update_settings=Uppdatera inställningar
-settings.change_reponame_prompt=Denna ändring kommer att påverka hur länkar relaterar till detta repo.
 settings.advanced_settings=Advancerade Inställningar
 settings.wiki_desc=Aktivera wikisystem
 settings.use_internal_wiki=Använd inbyggd wiki

options/locale/locale_tr-TR.ini

@@ -636,7 +636,6 @@ settings.sync_mirror=Sync Now
 settings.mirror_sync_in_progress=Mirror syncing is in progress, please refresh page in about a minute.
 settings.site=Resmi Web Sitesi
 settings.update_settings=Ayarları Güncelle
-settings.change_reponame_prompt=Bu değişiklik, bağlantıların depoyla olan ilişkisini etkileyecektir.
 settings.advanced_settings=Gelişmiş Ayarlar
 settings.wiki_desc=Viki sıstemini etkinleştir
 settings.use_internal_wiki=Use builtin wiki

options/locale/locale_zh-CN.ini

@@ -650,7 +650,6 @@ settings.sync_mirror=立即同步
 settings.mirror_sync_in_progress=镜像同步请求已经生效，请稍后刷新页面。
 settings.site=官方网站
 settings.update_settings=更新仓库设置
-settings.change_reponame_prompt=该操作将会影响到所有与该仓库有关的链接
 settings.advanced_settings=高级设置
 settings.wiki_desc=启用 Wiki 系统
 settings.use_internal_wiki=使用内置 Wiki 系统

options/locale/locale_zh-HK.ini

@@ -645,7 +645,6 @@ settings.sync_mirror=立即同步
 settings.mirror_sync_in_progress=鏡像同步正在進行中，請大約一分鐘後刷新頁面。
 settings.site=官方網站
 settings.update_settings=更新儲存庫設定
-settings.change_reponame_prompt=該操作將會影響到所有與該儲存庫有關的鏈接
 settings.advanced_settings=高級設定
 settings.wiki_desc=啓用 Wiki 系統
 settings.use_internal_wiki=使用內建 wiki

options/locale/locale_zh-TW.ini

@@ -645,7 +645,6 @@ settings.sync_mirror=立即同步
 settings.mirror_sync_in_progress=鏡像同步正在進行中，請大約一分鐘後刷新頁面。
 settings.site=官方網站
 settings.update_settings=更新儲存庫設定
-settings.change_reponame_prompt=該操作將會影響到所有與該儲存庫有關的鏈接
 settings.advanced_settings=高級設定
 settings.wiki_desc=啓用 Wiki 系統
 settings.use_internal_wiki=使用內建 wiki

routers/api/v1/api.go

@@ -52,7 +52,14 @@ func repoAssignment() macaron.Handler {
 		repo, err := models.GetRepositoryByName(owner.ID, repoName)
 		if err != nil {
 			if models.IsErrRepoNotExist(err) {
-				ctx.Status(404)
+				redirectRepoID, err := models.LookupRepoRedirect(owner.ID, repoName)
+				if err == nil {
+					context.RedirectToRepo(ctx.Context, redirectRepoID)
+				} else if models.IsErrRepoRedirectNotExist(err) {
+					ctx.Status(404)
+				} else {
+					ctx.Error(500, "LookupRepoRedirect", err)
+				}
 			} else {
 				ctx.Error(500, "GetRepositoryByName", err)
 			}

routers/repo/setting.go

@@ -68,6 +68,11 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 				return
 			}
 
+			err := models.NewRepoRedirect(ctx.Repo.Owner.ID, repo.ID, repo.Name, newRepoName)
+			if err != nil {
+				ctx.Handle(500, "NewRepoRedirect", err)
+			}
+
 			log.Trace("Repository name changed: %s/%s -> %s", ctx.Repo.Owner.Name, repo.Name, newRepoName)
 		}
 		// In case it's just a case change.

templates/repo/settings/options.tmpl

@@ -14,7 +14,7 @@
 						{{.CsrfTokenHtml}}
 						<input type="hidden" name="action" value="update">
 						<div class="required field {{if .Err_RepoName}}error{{end}}">
-							<label for="repo_name">{{.i18n.Tr "repo.repo_name"}}<span class="text red hide" id="repo-name-change-prompt"> {{.i18n.Tr "repo.settings.change_reponame_prompt"}}</span></label>
+							<label for="repo_name">{{.i18n.Tr "repo.repo_name"}}</label>
 							<input id="repo_name" name="repo_name" value="{{.Repository.Name}}" data-repo-name="{{.Repository.Name}}" autofocus required>
 						</div>
 						<div class="field {{if .Err_Description}}error{{end}}">