René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"CI artifacts missing in some jobs","articleBody":"## Prerequisites\nPlease make sure to check off these prerequisites before submitting a bug report.\n- [x] Test that the bug appears on the current version of the master branch. Make sure to include the commit hash of the commit you checked out.\n- [x] Check that the issue hasn't already been reported, by checking the currently open issues.\n- [x] If there are steps to reproduce the problem, make sure to write them down below.\n- [ ] If relevant, please include the hls4ml project files, which were created directly before and/or after the bug.\n\n## Quick summary\nSome CI jobs upload no artifacts even though the CI template expects tarballs and/or synthesis reports, which results in artifact upload warnings. *The jobs do not fail, but this is noisy*.\n\n## Details\n### Steps to Reproduce\n1. Look at a CI job that only executes tests without synthesis and without explicit tarball generation, e.g.\n   - `test_recurrent_pytorch.py::test_gru`, `test_lstm`, `test_rnn`\n   - https://gitlab.cern.ch/fastmachinelearning/hls4ml/-/jobs/69760179\n2. Observe the artifact upload step.\n\n### Expected behavior\nArtifacts should be produced.\n\n### Actual behavior\nArtifacts are produced only for certain backends/tests (e.g., Catapult where tarballs are always generated). Other jobs produce none and the upload step logs:\n```\nUploading artifacts...\nWARNING: test/pytest/*.tar.gz: no matching files...\nWARNING: test/pytest/synthesis_report_*.json: no matching files...\nERROR: No files to upload\n```\n\n## Optional\n\n### Possible fix\n- Add a `WriteTar` configuration to `CatapultWriter` for consistency with other backends.\n- If artifacts are desired, update tests to set `write_tar=True`.\n\n### Additional context\nThe root cause is inconsistent artifact production: Catapult always generates `.tar.gz` archives (unconditional `write_tar` in `CatapultWriter.write_hls()`), while other backends only generate tarballs when `WriterConfig.WriteTar` is enabled (default False).\n\nEvidence\n- `hls4ml/writer/catapult_writer.py`: `write_hls()` always calls `self.write_tar(model)` (no config gate).\n- `hls4ml/writer/vivado_writer.py`, `oneapi_writer.py`, `quartus_writer.py`: tarball creation is gated by `WriteTar`.","author":{"url":"https://github.com/marco66colombo","@type":"Person","name":"marco66colombo"},"datePublished":"2026-02-13T21:14:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1438/hls4ml/issues/1438"}