Sqlite supports memory database for test purpose

Makefile

@@ -170,6 +170,7 @@ SWAGGER_SPEC_S_JSON := s|"basePath": *"{{AppSubUrl \| JSEscape}}/api/v1"|"basePa
 SWAGGER_EXCLUDE := code.gitea.io/sdk
 SWAGGER_NEWLINE_COMMAND := -e '$$a\'
 
+TEST_SQLITE_PATH ?= :memory:
 TEST_MYSQL_HOST ?= mysql:3306
 TEST_MYSQL_DBNAME ?= testgitea
 TEST_MYSQL_USERNAME ?= root
@@ -532,7 +533,8 @@ $(GO_LICENSE_FILE): go.mod go.sum
 	@rm -rf $(GO_LICENSE_TMP_DIR)
 
 generate-ini-sqlite:
-	sed -e 's|{{REPO_TEST_DIR}}|${REPO_TEST_DIR}|g' \
+	sed -e 's|{{TEST_SQLITE_PATH}}|${TEST_SQLITE_PATH}|g' \
+		-e 's|{{REPO_TEST_DIR}}|${REPO_TEST_DIR}|g' \
 		-e 's|{{TEST_LOGGER}}|$(or $(TEST_LOGGER),test$(COMMA)file)|g' \
 		-e 's|{{TEST_TYPE}}|$(or $(TEST_TYPE),integration)|g' \
 			tests/sqlite.ini.tmpl > tests/sqlite.ini

modules/setting/database.go

@@ -119,8 +119,10 @@ func DBConnStr() (string, error) {
 		if !EnableSQLite3 {
 			return "", errors.New("this Gitea binary was not built with SQLite3 support")
 		}
-		if err := os.MkdirAll(filepath.Dir(Database.Path), os.ModePerm); err != nil {
-			return "", fmt.Errorf("Failed to create directories: %w", err)
+		if Database.Path != ":memory:" {
+			if err := os.MkdirAll(filepath.Dir(Database.Path), os.ModePerm); err != nil {
+				return "", fmt.Errorf("failed to create directories: %w", err)
+			}
 		}
 		journalMode := ""
 		if Database.SQLiteJournalMode != "" {

tests/sqlite.ini.tmpl

@@ -3,7 +3,7 @@ RUN_MODE = prod
 
 [database]
 DB_TYPE = sqlite3
-PATH    = tests/{{TEST_TYPE}}/gitea-{{TEST_TYPE}}-sqlite/gitea.db
+PATH    = {{TEST_SQLITE_PATH}}
 
 [indexer]
 REPO_INDEXER_ENABLED = true