fix: make sure Vikunja is buildable without swagger docs present

magefile.go

@@ -177,6 +177,9 @@ func init() {
 // Some variables have external dependencies (like git) which may not always be available.
 func initVars() {
 	Tags = os.Getenv("TAGS")
+	if !strings.Contains(Tags, "swagger") {
+		Tags += " swagger"
+	}
 	setVersion()
 	setBinLocation()
 	setPkgVersion()

pkg/cmd/web.go

@@ -23,15 +23,14 @@ import (
 	"os/signal"
 	"time"
 
-	"code.vikunja.io/api/pkg/cron"
-
 	"code.vikunja.io/api/pkg/config"
+	"code.vikunja.io/api/pkg/cron"
 	"code.vikunja.io/api/pkg/initialize"
 	"code.vikunja.io/api/pkg/log"
 	"code.vikunja.io/api/pkg/routes"
-	"code.vikunja.io/api/pkg/swagger"
 	"code.vikunja.io/api/pkg/utils"
 	"code.vikunja.io/api/pkg/version"
+
 	"github.com/labstack/echo/v4"
 	"github.com/spf13/cobra"
 )
@@ -76,9 +75,6 @@ var webCmd = &cobra.Command{
 		// Version notification
 		log.Infof("Vikunja version %s", version.Version)
 
-		// Additional swagger information
-		swagger.SwaggerInfo.Version = version.Version
-
 		// Start the webserver
 		e := routes.NewEcho()
 		routes.RegisterRoutes(e)

pkg/routes/routes.go

@@ -71,7 +71,6 @@ import (
 	vikunja_file "code.vikunja.io/api/pkg/modules/migration/vikunja-file"
 	apiv1 "code.vikunja.io/api/pkg/routes/api/v1"
 	"code.vikunja.io/api/pkg/routes/caldav"
-	_ "code.vikunja.io/api/pkg/swagger" // To generate swagger docs
 	"code.vikunja.io/api/pkg/version"
 	"code.vikunja.io/web"
 	"code.vikunja.io/web/handler"

pkg/version/swagger.go

@@ -0,0 +1,26 @@
+// Vikunja is a to-do list application to facilitate your life.
+// Copyright 2018-2023 Vikunja and contributors. All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public Licensee as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public Licensee for more details.
+//
+// You should have received a copy of the GNU Affero General Public Licensee
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//go:build swagger
+// +build swagger
+
+package version
+
+import "code.vikunja.io/api/pkg/swagger"
+
+func init() {
+	// Additional swagger information
+	swagger.SwaggerInfo.Version = Version
+}