appendix: 23 Code-Ausschnitte aus dem Houston-Repository

Pin nixpkgs to the revision used by itc.componentware: the channel version
ships a latexminted that crashes on Python 3.14, which made every listing
fail and sent latexmk into an endless error prompt. Also force
nonstopmode/halt-on-error so a broken listing can never loop again.

figures/code/pagination-continuation-token.cs

@@ -0,0 +1,28 @@
+private async IAsyncEnumerable<ListObjectsV2Response> EnumerateResponsesAsync(
+    Func<ListObjectsV2Request> requestBuilder,
+    [EnumeratorCancellation] CancellationToken cancellationToken)
+{
+    string? continuationToken = null;
+    do
+    {
+        var request = requestBuilder();
+        request.ContinuationToken = continuationToken;
+        request.BucketName = _settings.S3.Bucket;
+
+        var response = await s3.ListObjectsV2Async(request, cancellationToken);
+        yield return response;
+
+        continuationToken = response.IsTruncated == true ? response.NextContinuationToken : null;
+    } while (continuationToken is not null);
+}
+
+private async IAsyncEnumerable<S3Object> EnumerateObjectsAsync(
+    Func<ListObjectsV2Request> requestBuilder,
+    [EnumeratorCancellation] CancellationToken cancellationToken)
+{
+    await foreach (var response in EnumerateResponsesAsync(requestBuilder, cancellationToken))
+    {
+        foreach (var obj in response.S3Objects ?? [])
+            yield return obj;
+    }
+}