Add "certs list" command to view existing certs in the database

cmd/certs.go

@@ -2,7 +2,7 @@ package cmd
 
 import (
 	"fmt"
-
+	"github.com/akrylysov/pogreb"
 	"github.com/urfave/cli/v2"
 
 	"codeberg.org/codeberg/pages/server/database"
@@ -12,6 +12,11 @@ var Certs = &cli.Command{
 	Name:  "certs",
 	Usage: "manage certs manually",
 	Subcommands: []*cli.Command{
+		&cli.Command{
+			Name:   "list",
+			Usage:  "list all certificates in the database",
+			Action: listCerts,
+		},
 		&cli.Command{
 			Name:   "remove",
 			Usage:  "remove a certificate from the database",
@@ -20,6 +25,26 @@ var Certs = &cli.Command{
 	},
 }
 
+func listCerts(ctx *cli.Context) error {
+	// TODO: make "key-database.pogreb" set via flag
+	keyDatabase, err := database.New("key-database.pogreb")
+	if err != nil {
+		return fmt.Errorf("could not create database: %v", err)
+	}
+
+	items := keyDatabase.Items()
+	for domain, _, err := items.Next(); err != pogreb.ErrIterationDone; domain, _, err = items.Next() {
+		if err != nil {
+			return err
+		}
+		if domain[0] == '.' {
+			fmt.Printf("*")
+		}
+		fmt.Printf("%s\n", domain)
+	}
+	return nil
+}
+
 func removeCert(ctx *cli.Context) error {
 	if ctx.Args().Len() < 1 {
 		return fmt.Errorf("'certs remove' requires at least one domain as an argument")