start the service using a cli

cmd/gotosocial/main.go

@@ -0,0 +1,63 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License 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 License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"os"
+
+	"github.com/gotosocial/gotosocial/cmd/server"
+	"github.com/sirupsen/logrus"
+
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+	app := &cli.App{
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:        "config",
+				Aliases:     []string{"c"},
+				Usage:       "Load configuration from `FILE`",
+			},
+			&cli.StringFlag{
+				Name:        "log-level",
+				Usage:       "Log level to run at: debug, info, warn, fatal",
+				Value:       "info",
+			},
+		},
+		Commands: []*cli.Command{
+			{
+				Name:  "server",
+				Usage: "gotosocial server-related tasks",
+				Subcommands: []*cli.Command{
+					{
+						Name:   "start",
+						Usage:  "start the gotosocial server",
+						Action: server.Run,
+					},
+				},
+			},
+		},
+	}
+
+	err := app.Run(os.Args)
+	if err != nil {
+		logrus.Fatal(err)
+	}
+}

cmd/server/server.go

@@ -16,20 +16,39 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-package main
+package server
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"os/signal"
 	"syscall"
 
 	"github.com/gotosocial/gotosocial/internal/db"
 	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli/v2"
 )
 
-func main() {
+// getLog will try to set the logrus log level to the
+// desired level specified by the user with the --log-level flag
+func getLog(c *cli.Context) (*logrus.Logger, error) {
 	log := logrus.New()
+	logLevel, err := logrus.ParseLevel(c.String("log-level"))
+	if err != nil {
+		return nil, err
+	}
+	log.SetLevel(logLevel)
+	return log, nil
+}
+
+// Run starts the gotosocial server
+func Run(c *cli.Context) error {
+	log, err := getLog(c)
+	if err != nil {
+		return fmt.Errorf("error creating logger: %s", err)
+	}
+
 	ctx := context.Background()
 	dbConfig := &db.Config{
 		Type:            "POSTGRES",
@@ -42,7 +61,7 @@ func main() {
 	}
 	dbService, err := db.NewService(ctx, dbConfig, log)
 	if err != nil {
-		panic(err)
+		return err
 	}
 
 	// catch shutdown signals from the operating system
@@ -53,8 +72,9 @@ func main() {
 
 	// close down all running services in order
 	if err := dbService.Stop(ctx); err != nil {
-		log.Errorf("error closing dbservice: %s", err)
+		return fmt.Errorf("error closing dbservice: %s", err)
 	}
 
 	log.Info("done! exiting...")
+	return nil
 }