Make Repo Code Indexer an Unique Queue (#17515)

The functioning of the code indexer queue really only makes sense as an unique queue
and doing this allows use to simplify the indexer data to simply delete the data if
the repo is no longer in the db.

Signed-off-by: Andrew Thornton <art27@cantab.net>

Author: zeripath

Diff for: integrations/repo_search_test.go

@@ -44,7 +44,6 @@ func TestSearchRepo(t *testing.T) {
 	repo, err = models.GetRepositoryByOwnerAndName("user2", "glob")
 	assert.NoError(t, err)
 
-	executeIndexer(t, repo, code_indexer.DeleteRepoFromIndexer)
 	executeIndexer(t, repo, code_indexer.UpdateRepoIndexer)
 
 	testSearch(t, "/user2/glob/search?q=loren&page=1", []string{"a.txt"})

Diff for: modules/indexer/code/indexer.go

@@ -75,16 +75,18 @@ func filenameOfIndexerID(indexerID string) string {
 
 // IndexerData represents data stored in the code indexer
 type IndexerData struct {
-	RepoID   int64
-	IsDelete bool
+	RepoID int64
 }
 
 var (
-	indexerQueue queue.Queue
+	indexerQueue queue.UniqueQueue
 )
 
 func index(indexer Indexer, repoID int64) error {
 	repo, err := models.GetRepositoryByID(repoID)
+	if models.IsErrRepoNotExist(err) {
+		return indexer.Delete(repoID)
+	}
 	if err != nil {
 		return err
 	}
@@ -146,22 +148,16 @@ func Init() {
 					log.Error("Unable to process provided datum: %v - not possible to cast to IndexerData", datum)
 					continue
 				}
-				log.Trace("IndexerData Process: %v %t", indexerData.RepoID, indexerData.IsDelete)
-
-				if indexerData.IsDelete {
-					if err := indexer.Delete(indexerData.RepoID); err != nil {
-						log.Error("indexer.Delete: %v", err)
-					}
-				} else {
-					if err := index(indexer, indexerData.RepoID); err != nil {
-						log.Error("index: %v", err)
-						continue
-					}
+				log.Trace("IndexerData Process Repo: %d", indexerData.RepoID)
+
+				if err := index(indexer, indexerData.RepoID); err != nil {
+					log.Error("index: %v", err)
+					continue
 				}
 			}
 		}
 
-		indexerQueue = queue.CreateQueue("code_indexer", handler, &IndexerData{})
+		indexerQueue = queue.CreateUniqueQueue("code_indexer", handler, &IndexerData{})
 		if indexerQueue == nil {
 			log.Fatal("Unable to create codes indexer queue")
 		}
@@ -265,14 +261,6 @@ func Init() {
 	}
 }
 
-// DeleteRepoFromIndexer remove all of a repository's entries from the indexer
-func DeleteRepoFromIndexer(repo *models.Repository) {
-	indexData := &IndexerData{RepoID: repo.ID, IsDelete: true}
-	if err := indexerQueue.Push(indexData); err != nil {
-		log.Error("Delete repo index data %v failed: %v", indexData, err)
-	}
-}
-
 // UpdateRepoIndexer update a repository's entries in the indexer
 func UpdateRepoIndexer(repo *models.Repository) {
 	indexData := &IndexerData{RepoID: repo.ID}

Diff for: modules/notification/indexer/indexer.go

@@ -109,7 +109,7 @@ func (r *indexerNotifier) NotifyDeleteComment(doer *models.User, comment *models
 func (r *indexerNotifier) NotifyDeleteRepository(doer *models.User, repo *models.Repository) {
 	issue_indexer.DeleteRepoIssueIndexer(repo)
 	if setting.Indexer.RepoIndexerEnabled {
-		code_indexer.DeleteRepoFromIndexer(repo)
+		code_indexer.UpdateRepoIndexer(repo)
 	}
 }