add webhook mode

cmd/listen.go

@@ -0,0 +1,100 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
+	"time"
+
+	"git.ronmi.tw/ronmi/forgejo-pages/lib"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// listenCmd represents the listen command
+var listenCmd = &cobra.Command{
+	Use:   "listen",
+	Short: "Start webhook listener",
+	Run: func(cmd *cobra.Command, args []string) {
+		viper.BindPFlags(cmd.Flags())
+		// check flags
+		bind := viper.GetString("bind")
+		server := viper.GetString("server")
+		user := viper.GetString("user")
+		token := viper.GetString("token")
+		dir := viper.GetString("dir")
+		branch := viper.GetString("branch")
+		if bind == "" || server == "" || user == "" || token == "" || branch == "" || dir == "" {
+			fmt.Println("bind, server, user, token, branch and dir are required")
+			fmt.Println("dumping flags:")
+			fmt.Println("    bind:   ", bind)
+			fmt.Println("    server: ", server)
+			fmt.Println("    user:   ", user)
+			fmt.Println("    token:  ", token)
+			fmt.Println("    branch: ", branch)
+			fmt.Println("    dir:    ", dir)
+			return
+		}
+		serverUrl, err := url.Parse(server)
+		if err != nil {
+			fmt.Println("invalid server url: ", err)
+			return
+		}
+
+		cfg := &lib.WebhookCFG{
+			Forgejo: lib.Forgejo{
+				Server: *serverUrl,
+				Token:  token,
+				Branch: branch,
+			},
+			GitDir:  filepath.Join(dir, "git"),
+			PageDir: filepath.Join(dir, "pages"),
+			GitUser: user,
+			GitPass: token,
+		}
+
+		s, err := lib.UseWebhook(bind, cfg)
+		if err != nil {
+			fmt.Println("cannot create server: ", err)
+			return
+		}
+
+		ctx, stop := signal.NotifyContext(
+			context.TODO(),
+			os.Interrupt,
+			syscall.SIGTERM,
+			os.Kill,
+		)
+		defer stop()
+
+		fmt.Println("starting server")
+		go func() {
+			<-ctx.Done()
+			stop()
+			ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
+			defer cancel()
+			s.Shutdown(ctx)
+		}()
+		s.ListenAndServe()
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(listenCmd)
+
+	f := listenCmd.Flags()
+	f.StringP("bind", "a", ":8080", "bind address")
+	f.StringP("server", "s", "", "Forgejo server address")
+	f.StringP("user", "u", "", "Forgejo user")
+	f.StringP("token", "k", "", "Forgejo api token or password")
+	f.StringP("branch", "b", "static-pages", "branch to use")
+	f.StringP("dir", "d", "", "directory to store data, must be writable")
+}

cmd/serve.go

@@ -23,6 +23,7 @@ var serveCmd = &cobra.Command{
 	Use:   "serve",
 	Short: "Start the static page server.",
 	Run: func(cmd *cobra.Command, args []string) {
+		viper.BindPFlags(cmd.Flags())
 		// check flags
 		bind := viper.GetString("bind")
 		server := viper.GetString("server")
@@ -83,5 +84,4 @@ func init() {
 	f.StringP("token", "k", "", "Forgejo api token")
 	f.StringP("branch", "b", "static-pages", "branch to use")
 	f.StringP("well-known", "w", "/.well-known", "well-known path, used by LetsEncrypt")
-	viper.BindPFlags(f)
 }