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ea00199554
backend_build.yml pushes by canonical digest only (push-by-digest=true, no tags applied at build time). User-facing tagging happens in backend_merge.yml's `imagetools create` step. Before this commit, scripts/changed-backends.js emitted a merge entry only for tag-suffixes with 2+ legs, so every single-arch backend (CUDA/ROCm/Intel Python images, vLLM, sglang, transformers, diffusers, ...) pushed its digest untagged and stayed that way until quay's GC reaped it. Symptom: tag releases shipped multi-arch backends tagged correctly, but no v<X>-gpu-nvidia-cuda-12-vllm (or any singleton variant) ever appeared in the registry. Changes: - scripts/changed-backends.js drops the `group.length < 2` skip and emits two merge matrices, one per arch class, so each downstream merge job can `needs:` only its corresponding build matrix. - backend.yml splits backend-merge-jobs into multiarch and singlearch variants. The split preserves PR #9746's fix: slow singlearch CUDA builds (~6h) must not gate multiarch merges, or quay's GC reaps the multiarch per-arch digests before they're tagged. - backend_pr.yml mirrors the split. - backend_build.yml renames the digest artifact from `digests<suffix>-<platform-tag>` to `digests<suffix>--<platform-tag-or-"single">`. The `--` separator prevents the merge-side glob from over-matching sibling backends whose tag-suffix is a prefix of ours (e.g. -cpu-vllm vs -cpu-vllm-omni, -cpu-mlx vs -cpu-mlx-audio); the `single` placeholder keeps the name well-formed when platform-tag is empty. - backend_merge.yml updates the download pattern to match. Verified locally: a tag-push event now expands to 36 multiarch merge entries (= 72 builds / 2 legs) and 199 singlearch merge entries (one per singleton, including -gpu-nvidia-cuda-12-vllm at index 24). Assisted-by: Claude:claude-opus-4-7 Signed-off-by: Ettore Di Giacinto <mudler@localai.io>