Improve error messages on GitHub API errors (#518)

Fixes: #513

Author: eifinger

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+  "recommendations": ["biomejs.biome"]
+}

.vscode/settings.json

@@ -0,0 +1,16 @@
+{
+  "editor.codeActionsOnSave": {
+    "source.action.useSortedAttributes.biome": "explicit",
+    "source.action.useSortedKeys.biome": "explicit",
+    "source.fixAll.biome": "explicit"
+  },
+  "editor.defaultFormatter": "biomejs.biome",
+  "editor.formatOnSave": true,
+  "explorer.excludeGitIgnore": false,
+  "search.defaultViewMode": "list",
+  "search.exclude": {
+    "**/node_modules": true
+  },
+  "typescript.enablePromptUseWorkspaceTsdk": true,
+  "typescript.tsdk": "node_modules/typescript/lib"
+}

dist/setup/index.js

@@ -184,7 +184,13 @@ async function getReleaseTagNames(
     owner: OWNER,
     repo: REPO,
   });
-  return response.map((release) => release.tag_name);
+  const releaseTagNames = response.map((release) => release.tag_name);
+  if (releaseTagNames.length === 0) {
+    throw Error(
+      "Github API request failed while getting releases. Check the GitHub status page for outages. Try again later.",
+    );
+  }
+  return releaseTagNames;
 }
 
 async function getLatestVersion(githubToken: string) {
@@ -197,14 +203,18 @@ async function getLatestVersion(githubToken: string) {
   try {
     latestRelease = await getLatestRelease(octokit);
   } catch (err) {
-    core.info(
-      "No (valid) GitHub token provided. Falling back to anonymous. Requests might be rate limited.",
-    );
-    if (err instanceof Error) {
-      core.debug(err.message);
+    if ((err as Error).message.includes("Bad credentials")) {
+      core.info(
+        "No (valid) GitHub token provided. Falling back to anonymous. Requests might be rate limited.",
+      );
+      const octokit = new Octokit();
+      latestRelease = await getLatestRelease(octokit);
+    } else {
+      core.error(
+        "Github API request failed while getting latest release. Check the GitHub status page for outages. Try again later.",
+      );
+      throw err;
     }
-    const octokit = new Octokit();
-    latestRelease = await getLatestRelease(octokit);
   }
 
   if (!latestRelease) {