Merge pull request #8630 from xamarin/cadsit-page-github-manifest-download

page through github statuses for manifest URL

tools/devops/utils.csx

@@ -34,14 +34,23 @@ string DownloadWithGithubAuth (string uri)
 string manifest_url = null;
 string GetManifestUrl (string hash)
 {
-	if (manifest_url == null) {
-		var url = $"https://api.github.com/repos/xamarin/xamarin-macios/statuses/{hash}";
+	var page = 1;
+	var hasContent = true;
+	while (manifest_url == null && hasContent) {
+		var url = $"https://api.github.com/repos/xamarin/xamarin-macios/statuses/{hash}?page={page}";
 		var json = JToken.Parse (DownloadWithGithubAuth (url));
-		var value = (JValue) ((JArray) json).Where ((v) => v ["context"].ToString () == "manifest").Select ((v) => v ["target_url"]).FirstOrDefault ();
-		manifest_url = (string) value?.Value;
-		if (manifest_url == null)
-			throw new Exception ($"Could not find the manifest for {hash}. Is the commit already built by CI?");
+		var statuses = (JValue) ((JArray) json);
+		hasContent &= statuses.HasValues;
+		if (hasContent) {
+			var value = statuses.Where ((v) => v ["context"].ToString () == "manifest").Select ((v) => v ["target_url"]).FirstOrDefault ();
+			manifest_url = (string) value?.Value;
+		}
+		page++;
 	}
+
+	if (manifest_url == null)
+		throw new Exception ($"Could not find the manifest for {hash}. Is the commit already built by CI?");
+
 	return manifest_url;
 }