From 4d520371e1385cbe7e29aa6c65b95befc455e045 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20H=C3=BCbner?= <fhuebner@posteo.de>
Date: Thu, 10 Oct 2024 21:48:12 +0200
Subject: [PATCH] maven version lookup

---
 server/neoforge.go | 19 +++++++++++++------
 web/features.go    |  2 +-
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/server/neoforge.go b/server/neoforge.go
index df8f608..f0b684f 100644
--- a/server/neoforge.go
+++ b/server/neoforge.go
@@ -2,6 +2,7 @@ package server
 
 import (
 	"fmt"
+	"github.com/nothub/mrpack-install/maven"
 	"github.com/nothub/mrpack-install/web"
 	"log"
 )
@@ -11,18 +12,24 @@ type NeoForgeInstaller struct {
 	NeoForgeVersion  string
 }
 
-// TODO maven version lookup: https://maven.neoforged.net/releases/net/neoforged/forge/maven-metadata.xml
-
 func (inst *NeoForgeInstaller) Install(serverDir string, serverFile string) error {
-	// TODO: implement automatic lookup for latest version
-	if inst.NeoForgeVersion == "" || inst.NeoForgeVersion == "latest" {
-		log.Fatalln("automatic NeoForge version lookup not implemented\nplease set server version with --flavor-version flag")
+	version := inst.NeoForgeVersion
+	if version == "" || version == "latest" {
+		meta, err := maven.FetchMetadata("https://maven.neoforged.net/releases/net/neoforged/neoforge/maven-metadata.xml")
+		if err != nil {
+			return err
+		}
+		// TODO: instead of using the latest release, match against the latest
+		//       non-pre-release version that matches the minecraft version
+		version = meta.Versioning.Release
 	}
-	u := fmt.Sprintf("https://maven.neoforged.net/releases/net/neoforged/neoforge/%s/neoforge-%s-installer.jar", inst.NeoForgeVersion, inst.NeoForgeVersion)
+
+	u := fmt.Sprintf("https://maven.neoforged.net/releases/net/neoforged/neoforge/%s/neoforge-%s-installer.jar", version, version)
 	file, err := web.DefaultClient.DownloadFile(u, serverDir, serverFile)
 	if err != nil {
 		return err
 	}
+
 	log.Println("Server jar downloaded to:", file)
 	return nil
 }
diff --git a/web/features.go b/web/features.go
index 5bb7e92..69eb069 100644
--- a/web/features.go
+++ b/web/features.go
@@ -68,7 +68,7 @@ func (c *Client) DownloadFile(url string, downloadDir string, fileName string) (
 
 	// TODO: this needs to (silently?) overwrite existing files!
 
-	log.Printf("downloading: %s", url)
+	log.Printf("Downloading file from: %s", url)
 
 	request, err := http.NewRequest(http.MethodGet, url, nil)
 	if err != nil {