Environment Automation

wf2wf can build reproducible software stacks from Conda YAML files and attach them to your workflow.

Workflow

1. Conda YAML → lock-file via conda-lock

2. Locked environment realised with micromamba

3. Packed with conda-pack → tarball

4. Tarball baked into OCI image via docker buildx (or Buildah)

5. Optional: convert OCI → .sif via Apptainer

6. SBOM generated with Syft

CLI flags

Flag	Purpose
--auto-env build	Build images if not cached
--auto-env reuse	Reuse existing images only
--push-registry URL	Push to remote registry
--apptainer	Produce .sif images
--fail-on-loss	Abort if environment info would be lost

Caching & pruning

Environment artefacts are content-addressed by the SHA-256 of the lock file. Use wf2wf cache prune to clear old images.