ci: delete the old generic package file right before re-uploading it (#21)

Co-authored-by: Layue13 <layue13@icloud.com>

.github/workflows/publish-tdlm.yml

@@ -138,6 +138,17 @@ jobs:
 
           def put(name: str, data: bytes):
               url = upload_root + "/" + urllib.parse.quote(name, safe="")
+              # Gitea refuses to overwrite a generic package file (HTTP 409), so the previous copy of this one
+              # file is deleted right before it is uploaded again (keeps the gap without a file as short as possible).
+              delete = urllib.request.Request(url, method="DELETE")
+              delete.add_header("Authorization", "token " + token)
+              delete.add_header("User-Agent", "tdlm-hmcl-publish")
+              try:
+                  with urllib.request.urlopen(delete, timeout=300) as response:
+                      response.read()
+              except urllib.error.HTTPError as exc:
+                  if exc.code != 404:
+                      raise SystemExit("HTTP %s deleting the old %s: %s" % (exc.code, name, exc.read()[:300]))
               request = urllib.request.Request(url, data=data, method="PUT")
               request.add_header("Authorization", "token " + token)
               request.add_header("Content-Type", "application/octet-stream")

HMCL/src/main/java/org/jackhuang/hmcl/Metadata.java

@@ -141,9 +141,9 @@ public final class Metadata {
         return null;
     }
 
-    /// Default client Server Modpack fileApi (CDN mirror of Pack's `tdlm-client/latest` layout).
+    /// Default client Server Modpack fileApi: the Nexus raw repository `tdlm-client` read through the CDN host.
     public static final String DEFAULT_CLIENT_FILE_API =
-            "https://packages.dandanton.com/tdlm-client/latest";
+            "https://maven.dandanton.com/repository/tdlm-client";
 
     /// Stable client update root (`server-manifest.json` and `overrides/` live under this URL).
     ///

HMCL/src/main/java/org/jackhuang/hmcl/ui/Controllers.java

@@ -398,12 +398,22 @@ public final class Controllers {
                         .whenComplete(Schedulers.javafx(), (result, exception) -> {
                             if (exception != null) {
                                 LOG.warning("Failed to fetch client Server Modpack manifest", exception);
+                                Controllers.dialog(
+                                        manifestUrl + "\n" + exception.getMessage(),
+                                        i18n("message.error"),
+                                        MessageType.ERROR);
+                                Instances.importModpack();
                                 return;
                             }
                             ServerModpackManifest manifest =
                                     JsonUtils.fromMaybeMalformedJson(result, ServerModpackManifest.class);
                             if (manifest == null) {
                                 LOG.warning("Malformed client Server Modpack manifest from " + manifestUrl);
+                                Controllers.dialog(
+                                        i18n("modpack.type.server.malformed"),
+                                        i18n("message.error"),
+                                        MessageType.ERROR);
+                                Instances.importModpack();
                                 return;
                             }
                             Controllers.getDecorator().startWizard(