Skip versions without server jar

build.py

@@ -39,10 +39,10 @@ class DownloadInfo(TypedDict):
 
 
 class VersionDownloads(TypedDict):
-    client: DownloadInfo
-    client_mappings: DownloadInfo
-    server: DownloadInfo
-    server_mappings: DownloadInfo
+    client: NotRequired[DownloadInfo]
+    client_mappings: NotRequired[DownloadInfo]
+    server: NotRequired[DownloadInfo]
+    server_mappings: NotRequired[DownloadInfo]
 
 
 class VersionManifestFull(TypedDict):
@@ -152,6 +152,9 @@ default_java_version: JavaVersion = {
     "majorVersion": 8
 }
 
+class NoServerException(Exception):
+    pass
+
 def build_version(manifest: VersionManifest, version_id: str, repository: str = "hub.cnml.de/minecraft"):
     matching_version = list(
         filter(lambda v: v["id"] == version_id, manifest["versions"]))
@@ -162,7 +165,10 @@ def build_version(manifest: VersionManifest, version_id: str, repository: str =
     print(
         f"Version [{version['type']}] {version['id']} requires java version {java_version['majorVersion']} ({java_version['component']})")
     server_jar_file = Path("versions") / version['id'] / "server.jar"
-    server_jar = version["downloads"]["server"]
+    server_jar = version["downloads"].get("server")
+    if server_jar is None:
+        raise NoServerException(f"No server build exists for {version['id']} (Java {java_version['majorVersion']})")
+
     download_file(server_jar, server_jar_file)
 
     build_args: DockerfileBuildArgs = {
@@ -204,8 +210,11 @@ if __name__ == "__main__":
     versions: list[str] = list(version["id"] for version in manifest["versions"]
                                if version["type"] == "release") if args.all else args.versions
     for version_id in versions:
+        print()
         try:
             build_version(manifest, version_id)
+        except NoServerException as e:
+            print(e)
         except Exception as e:
             print(f"Failed building images for version {version_id}")
             if args.force: