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CI: use shallow, blob-filtered CCCL submodule checkouts - #3392
actions/checkout applies its blob filter only to the root repository, leaving CCCL submodule clones unfiltered and causing slow, variable checkout times.
Fetch submodules separately with --depth=1 --filter=blob:none across build, source-test, coverage, and rendered-documentation jobs. Preserve full root history and release tags for setuptools-scm, plus URL syncing and forced checkout for reused workspaces.
Validation: fresh and reused checkout checks passed; nine workflow regression tests passed. Actionlint diagnostics are unchanged. Windows checkout timing remains unverified.
Reviewing files that changed from the base of the PR and between d0f501c and 25fc813.
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Summary
Summary by CodeRabbit
Chores
Updated package build, test, and coverage workflows to fetch submodules separately using shallow, filtered checkouts.
The link-check workflow now fetches submodules only for the rendered documentation job.
Documentation
Added guidance for configuring submodule checkouts in package build workflows.
Updated source-clone instructions to require Git 2.36 or newer and use filtered downloads for repository files and submodules. Historical file contents are fetched as needed, while commit history and release tags remain available.
CI workflows now disable automatic submodule checkout and explicitly initialize submodules recursively with depth 1 and blob filtering. Contributor and installation clone instructions add partial-clone filters.
CI workflows disable automatic submodule checkout and explicitly synchronize and initialize submodules recursively with depth 1 and blob filtering. The README documents this procedure and notes that root checkout filtering does not apply to submodules.
Clone commands add blob filtering for the repository and its submodules. Contributor guidance describes deferred retrieval of historical file contents while retaining commit history and release tags.
Assessment against linked issues
Objective
Addressed
Explanation
Reduce CCCL submodule fetch time with shallow, blob-filtered submodule checkout [#3351]
✅
Change: Other · Severity of issue fixed: Medium
Merge Risk: Low · previous review d0f50
Users on older Git, including Ubuntu 22.04, cannot run the documented source-install clone commands until the docs state the Git 2.36 requirement and offer a fallback. A possible Git ownership failure in two container CI jobs is unconfirmed. The change is otherwise a focused CI checkout optimization.
- [ ] Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts
Reviewing files that changed from the base of the PR and between e01e453 and 3db263d.
Files selected for processing: 7
.github/workflows/build-wheel.yml
.github/workflows/ci-pixi-source-test.yml
.github/workflows/coverage.yml
.github/workflows/lychee.yml
.github/workflows/test-sdist-linux.yml
.github/workflows/test-sdist-windows.yml
ci/README.md
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Files selected for processing: 3
CONTRIBUTING.md
cuda_core/docs/source/install.rst
cuda_pathfinder/docs/source/install.rst
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closesNVIDIA#3351
actions/checkout applies its blob filter only to the root repository,
leaving CCCL submodule clones unfiltered and causing slow, variable
checkout times.
Fetch submodules separately with --depth=1 --filter=blob:none across
build, source-test, coverage, and rendered-documentation jobs. Preserve
full root history and release tags for setuptools-scm, plus URL syncing
and forced checkout for reused workspaces.
Validation: fresh and reused checkout checks passed; nine workflow
regression tests passed. Actionlint diagnostics are unchanged.
Windows checkout timing remains unverified.
— codex GPT-6 on behalf of Ralf —
Preserve root history and release tags while fetching CCCL separately with
shallow history and blob filtering. Align the contributor guide and package
installation examples, and control submodule fetches explicitly on updates.
Signed-off-by: Ralf W. Grosse-Kunstleve <rgrossekunst@nvidia.com>
— codex GPT-6 on behalf of Ralf —
Use Git's native submodule filtering in each clone example and retain the
ordinary update instructions. Preserve full commit history and release tags
while keeping the filtered recipe directly visible to users and agents.
Signed-off-by: Ralf W. Grosse-Kunstleve <rgrossekunst@nvidia.com>
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CI/CDCI/CD infrastructurecuda.coreEverything related to the cuda.core modulecuda.pathfinderEverything related to the cuda.pathfinder module
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Description
closes #3351
actions/checkout applies its blob filter only to the root repository, leaving CCCL submodule clones unfiltered and causing slow, variable checkout times.
Fetch submodules separately with --depth=1 --filter=blob:none across build, source-test, coverage, and rendered-documentation jobs. Preserve full root history and release tags for setuptools-scm, plus URL syncing and forced checkout for reused workspaces.
Validation: fresh and reused checkout checks passed; nine workflow regression tests passed. Actionlint diagnostics are unchanged. Windows checkout timing remains unverified.
Checklist