90 lines
3.9 KiB
Bash
90 lines
3.9 KiB
Bash
 
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#!/usr/bin/env bash
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# Assemble the multi-arch index tag(s) from per-platform images that were
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# already pushed BY DIGEST (no tag). Used by the trusted x86 publish job
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# (see .gitea/workflows/build-push-coraza.yaml; template for the other WHP
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# image repos, docs/arm64/IMAGE-PIPELINE-PLAN.md section 4.1/4.4).
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#
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# assemble-multiarch-index.sh \
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# --amd64 sha256:<digest> \
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# --arm64 sha256:<digest> --arm64-outcome success|failure|cancelled|skipped \
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# --repo <registry/path> [--repo <other registry/path> ...] \
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# --tag <tag> [--tag <tag> ...] [--builder <buildx builder>]
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#
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# Rules (all enforced here so the workflow stays thin and these are testable):
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# * amd64 is mandatory. A missing/malformed amd64 digest, or an amd64 digest
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# that does not inspect as linux/amd64, aborts with exit 1 and publishes
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# NOTHING (the same "build failed, no tag" outcome as before multi-arch).
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# * arm64 is attached ONLY when its step outcome is exactly "success" AND the
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# digest is well-formed AND it inspects as linux/arm64. Otherwise the tag is
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# published amd64-only (warning, exit 0). The arm64 digest must come from
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# THIS run's step output - the workflow never reads it from a registry tag,
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# so a previous build's arm64 can never be re-attached to a newer amd64.
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# * every --tag is created in every --repo from <repo>@<digest> sources in
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# that same repo (both digests were pushed to every --repo by the build).
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#
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# Env: IMAGETOOLS overrides the command (default: "docker buildx imagetools");
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# the test suite points it at a stub.
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set -euo pipefail
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IMAGETOOLS=${IMAGETOOLS:-docker buildx imagetools}
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amd64=""; arm64=""; outcome="skipped"; builder=""
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repos=(); tags=()
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die() { echo "assemble-multiarch-index: $*" >&2; exit 1; }
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warn() { echo "::warning::assemble-multiarch-index: $*"; }
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while [ $# -gt 0 ]; do
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case "$1" in
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--amd64) amd64=${2-}; shift 2 ;;
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--arm64) arm64=${2-}; shift 2 ;;
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--arm64-outcome) outcome=${2-}; shift 2 ;;
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--repo) repos+=("${2-}"); shift 2 ;;
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--tag) tags+=("${2-}"); shift 2 ;;
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--builder) builder=${2-}; shift 2 ;;
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*) die "unknown argument: $1" ;;
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esac
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done
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re='^sha256:[0-9a-f]{64}$'
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[ ${#repos[@]} -gt 0 ] || die "need at least one --repo"
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[ ${#tags[@]} -gt 0 ] || die "need at least one --tag"
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[[ $amd64 =~ $re ]] || die "amd64 digest missing or malformed ('$amd64'); refusing to publish"
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bflag=(); [ -n "$builder" ] && bflag=(--builder "$builder")
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# arch_of <ref>: prints the image config's architecture ("" on any failure).
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arch_of() {
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# shellcheck disable=SC2086
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$IMAGETOOLS inspect "${bflag[@]}" "$1" --format '{{json .Image}}' 2>/dev/null \
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| python3 -I -c 'import json,sys; print(json.load(sys.stdin).get("architecture",""))' 2>/dev/null || true
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}
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for r in "${repos[@]}"; do
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[ "$(arch_of "$r@$amd64")" = amd64 ] || die "$r@$amd64 does not inspect as linux/amd64; refusing to publish"
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done
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use_arm64=0
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if [ "$outcome" != success ]; then
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warn "arm64 step outcome is '$outcome': publishing amd64-only (no arm64 digest is carried over)"
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elif ! [[ $arm64 =~ $re ]]; then
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warn "arm64 step reported success but its digest is missing/malformed: publishing amd64-only"
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elif [ "$arm64" = "$amd64" ]; then
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warn "arm64 digest equals the amd64 digest: publishing amd64-only"
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else
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use_arm64=1
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for r in "${repos[@]}"; do
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if [ "$(arch_of "$r@$arm64")" != arm64 ]; then
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warn "$r@$arm64 does not inspect as linux/arm64: publishing amd64-only"
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use_arm64=0; break
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fi
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done
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fi
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for r in "${repos[@]}"; do
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targs=(); for t in "${tags[@]}"; do targs+=(-t "$r:$t"); done
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srcs=("$r@$amd64"); [ "$use_arm64" = 1 ] && srcs+=("$r@$arm64")
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echo "assemble-multiarch-index: $r tags=${tags[*]} sources=${#srcs[@]} ($([ "$use_arm64" = 1 ] && echo 'amd64+arm64' || echo 'amd64-only'))"
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# shellcheck disable=SC2086
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$IMAGETOOLS create "${bflag[@]}" "${targs[@]}" "${srcs[@]}"
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done
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echo "platforms=$([ "$use_arm64" = 1 ] && echo linux/amd64,linux/arm64 || echo linux/amd64)"
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