fix: nomercure build tag (#2212)

- Fixes nomercure tag build
- Conditionally addds the mercure route and mercure project import

Fixes #2209

I am by no means a go developer, feel free to use this or not :)

---------

Signed-off-by: tehmaestro <alexnegrila89@gmail.com>
Co-authored-by: Alexander Stecher <45872305+AlliBalliBaba@users.noreply.github.com>

Author: tehmaestro

caddy/mercure-skip.go

@@ -2,12 +2,17 @@
 
 package caddy
 
+import (
+	"github.com/caddyserver/caddy/v2"
+	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
+)
+
 type mercureContext struct {
 }
 
-func (f *FrankenPHPModule) configureHotReload(_ *FrankenPHPApp) error {
-	return nil
+func (f *FrankenPHPModule) assignMercureHub(_ caddy.Context) {
 }
 
-func (f *FrankenPHPModule) assignMercureHub(_ caddy.Context) {
+func createMercureRoute() (caddyhttp.Route, error) {
+	return caddyhttp.Route{}, nil
 }

caddy/mercure.go

@@ -3,7 +3,12 @@
 package caddy
 
 import (
+	"encoding/json"
+	"errors"
+	"os"
 	"github.com/caddyserver/caddy/v2"
+	"github.com/caddyserver/caddy/v2/caddyconfig"
+	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
 	"github.com/dunglas/frankenphp"
 	"github.com/dunglas/mercure"
 	mercureCaddy "github.com/dunglas/mercure/caddy"
@@ -31,3 +36,36 @@ func (f *FrankenPHPModule) assignMercureHub(ctx caddy.Context) {
 		f.Workers[i] = wc
 	}
 }
+
+func createMercureRoute() (caddyhttp.Route, error) {
+	mercurePublisherJwtKey := os.Getenv("MERCURE_PUBLISHER_JWT_KEY")
+	if mercurePublisherJwtKey == "" {
+		return caddyhttp.Route{}, errors.New(`The "MERCURE_PUBLISHER_JWT_KEY" environment variable must be set to use the Mercure.rocks hub`)
+	}
+
+	mercureSubscriberJwtKey := os.Getenv("MERCURE_SUBSCRIBER_JWT_KEY")
+	if mercureSubscriberJwtKey == "" {
+		return caddyhttp.Route{}, errors.New(`The "MERCURE_SUBSCRIBER_JWT_KEY" environment variable must be set to use the Mercure.rocks hub`)
+	}
+
+	mercureRoute := caddyhttp.Route{
+		HandlersRaw: []json.RawMessage{caddyconfig.JSONModuleObject(
+			mercureCaddy.Mercure{
+				PublisherJWT: mercureCaddy.JWTConfig{
+					Alg: os.Getenv("MERCURE_PUBLISHER_JWT_ALG"),
+					Key: mercurePublisherJwtKey,
+				},
+				SubscriberJWT: mercureCaddy.JWTConfig{
+					Alg: os.Getenv("MERCURE_SUBSCRIBER_JWT_ALG"),
+					Key: mercureSubscriberJwtKey,
+				},
+			},
+			"handler",
+			"mercure",
+			nil,
+		),
+		},
+	}
+
+	return mercureRoute, nil;
+}

caddy/php-server.go

@@ -10,8 +10,6 @@ import (
 	"strings"
 	"time"
 
-	mercureModule "github.com/dunglas/mercure/caddy"
-
 	"github.com/caddyserver/caddy/v2"
 	"github.com/caddyserver/caddy/v2/caddyconfig"
 	caddycmd "github.com/caddyserver/caddy/v2/cmd"
@@ -253,34 +251,10 @@ func cmdPHPServer(fs caddycmd.Flags) (int, error) {
 	}
 
 	if mercure {
-		mercurePublisherJwtKey := os.Getenv("MERCURE_PUBLISHER_JWT_KEY")
-		if mercurePublisherJwtKey == "" {
-			panic(`The "MERCURE_PUBLISHER_JWT_KEY" environment variable must be set to use the Mercure.rocks hub`)
-		}
-
-		mercureSubscriberJwtKey := os.Getenv("MERCURE_SUBSCRIBER_JWT_KEY")
-		if mercureSubscriberJwtKey == "" {
-			panic(`The "MERCURE_SUBSCRIBER_JWT_KEY" environment variable must be set to use the Mercure.rocks hub`)
-		}
-
-		mercureRoute := caddyhttp.Route{
-			HandlersRaw: []json.RawMessage{caddyconfig.JSONModuleObject(
-				mercureModule.Mercure{
-					PublisherJWT: mercureModule.JWTConfig{
-						Alg: os.Getenv("MERCURE_PUBLISHER_JWT_ALG"),
-						Key: mercurePublisherJwtKey,
-					},
-					SubscriberJWT: mercureModule.JWTConfig{
-						Alg: os.Getenv("MERCURE_SUBSCRIBER_JWT_ALG"),
-						Key: mercureSubscriberJwtKey,
-					},
-				},
-				"handler",
-				"mercure",
-				nil,
-			),
-			},
-		}
+		mercureRoute, err := createMercureRoute()
+		if err != nil {
+        	return caddy.ExitCodeFailedStartup, err
+        }
 
 		subroute.Routes = append(caddyhttp.RouteList{mercureRoute}, subroute.Routes...)
 	}