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feat(release): affected-set — build only what changed since the last release #241

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feat(release): affected-set — build only what changed since the last release #241

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19 changes: 19 additions & 0 deletions .github/workflows/release-images.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -268,6 +268,25 @@ jobs:
combos=$(printf '%s\n%s' "$shared" "$ptc" | jq -cs 'add')
fi

# ── affected-set (manual dispatch): build only the combos + per-task whose
# benchmark or agent changed since the last release. A change under
# containers/core, gateways, or the root bake is a shared/base change → keep
# everything (the cascade = "bulk on base update"). rebuild_bases / --only /
# tag-release / no-prior-tag all skip this and build the full fleet. Leaves
# stay full: they're ~38s cache hits, and an empty leaf matrix would skip the
# merge job the combos depend on.
LAST=$(git tag --list 'v*' --sort=-v:refname | grep -vxF "${TAG:-}" | head -1 || true)
if [ "$IS_DISPATCH" = "true" ] && [ -z "${ONLY:-}" ] && [ "${{ inputs.rebuild_bases }}" != "true" ] && [ -n "$LAST" ]; then
ch=$(git diff --name-only "$LAST" HEAD 2>/dev/null || true)
if [ -n "$ch" ] && ! printf '%s\n' "$ch" | grep -qE '^containers/(core|gateways)/|^containers/docker-bake\.hcl|^\.github/workflows/release-images'; then
names() { printf '%s\n' "$ch" | sed -nE "s#^containers/$1/([^/]+)/.*#\\1#p" | sort -u | jq -Rsc 'split("\n")-[""]'; }
cb=$(names benchmarks); ca=$(names agents)
combos=$(printf '%s' "$combos" | jq -c --argjson b "$cb" --argjson a "$ca" 'map(select((.b|IN($b[])) or (.a|IN($a[]))))')
pertask=$(printf '%s' "$pertask" | jq -c --argjson b "$cb" 'map(select(.b|IN($b[])))')
echo "affected-set since $LAST: combos=$(jq length <<<"$combos") pertask=$(jq length <<<"$pertask") (changed benchmarks=$cb agents=$ca)"
fi
fi

# ── shard oversize lists into ≤256 chunks: [{idx,items}] ──
# GitHub caps a matrix at 256 jobs; each shard job loops its items. Chunk
# combos by 25 (thin overlays) and per-task bases by 10 (heavier builds).
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