virtctl v1.9.1 build recipe

github.com/kubevirt/kubevirt (v1.9.1) at c3d19093f9c7b843b3879b18dc088911c081c39e

Fetched once, with the network on, by the vendor step (Dockerfile.vendor) when the kit was made; the offline build uses the kit's vendored copies:

• git https://github.com/kubevirt/kubevirt.git

• Base imagequay.io/kubevirt/builder:2606231619-4fe2cd536f@sha256:a48a7dd5a1b80602269b8c714fdaa54f729a9a4a4d096f7ee0d15c94cef343e8
• BuildKitmoby/buildkit:v0.31.2
  sha256:e0e67ea9c4bb07bdef683e29f70f3b623d1eb9c82274a9ec04e6bb0511449fb0
• Build methodsource-rebuild-go
• SOURCE_DATE_EPOCH1791523273 (2026-10-09T05:21:13Z)
• Target digest (linux/amd64)sha256:634431da66d601627ffc0cddd0e41d02678ff5c1a2f6407661ae9f8a85091501
• Target config digestsha256:d8b31caea3ccedb686ad21bbcd0e657647cc9ac88c925ba284e11ec1c8bf4cf1
• Checksummed kit files25,664 (CHECKSUMS.sha256)

# =====================================================================================================================
# KubeVirt v1.9.1 virtctl: KubeVirt's OWN Bazel build, offline (docker buildx build --network=none).
# Stage kubevirt-build is KubeVirt's pinned builder (quay.io/kubevirt/builder, CentOS Stream 9, Bazel 6.5.0). It runs
# kubevirt-build.sh: the ReadyStack patch series (patches/, each patch says what it changes and why), KubeVirt's
# bootstrap and `bazel build //cmd/virtctl:virtctl-amd64` on vendored/virtctl-src (git archive of c3d19093f9c7), with the
# vendored Bazel repository cache (RPMs, Go SDK, rules, distroless base, libssl3 .deb: every download by sha256, none
# made here). virtctl is KubeVirt's static linux/amd64 binary; the final stage holds it
# and its deterministic tarball (sorted, mtime = SOURCE_DATE_EPOCH, owner 0:0, gzip -n) with the tarball's sha256.
# Dockerfile and Dockerfile.offline are byte copies of this file. Written by
# product-kits/kubevirt-stack/kubevirt/mk-kits.py from strategies/virtctl.json; never edit by hand.
# =====================================================================================================================
FROM quay.io/kubevirt/builder:2606231619-4fe2cd536f@sha256:a48a7dd5a1b80602269b8c714fdaa54f729a9a4a4d096f7ee0d15c94cef343e8 AS kubevirt-build
# the commit's date as the default (as every kit declares it): assemble_kit's scratch build passes no build arguments,
# and kubevirt-build.sh refuses to build without it; the canonical build and BUILD_OFFLINE.sh pass the same value
ARG SOURCE_DATE_EPOCH=1791523273
ARG KUBEVIRT_VERSION=v1.9.1
COPY vendored/virtctl-src/ /root/go/src/kubevirt.io/kubevirt/
COPY vendored/bazel-repository-cache/ /kvs/cache/repo/
COPY patches/ /kvs/kit/patches/
COPY vendor/ /kvs/kit/vendor/
COPY kubevirt-build.sh oci-rootfs.py gen_rpmdb.py gomod-sbom.py gomod-virtctl.txt kubevirt-pins.env Dockerfile.offline.pinned /kvs/kit/
# no ldconfig in a scratch image: there is no /var/cache/ldconfig/aux-cache
RUN bash /kvs/kit/kubevirt-build.sh build virtctl

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#!/usr/bin/env bash
# =============================================================================
# ReadyStack — offline reproducible rebuild.
#
# Rebuilds this product's image from THIS ARCHIVE ALONE, with no network access
# of any kind, and prints the resulting linux/amd64 image-manifest digest.
# Run ./VERIFY_OFFLINE.sh afterwards to assert it equals the published digest.
#
# Requirements: linux/amd64 Docker host, docker buildx >= 0.30, jq, tar.
# No git, no registry access, no additional tooling.
#
#   ./BUILD_OFFLINE.sh                the rebuild (OCI image + a docker-loadable copy)
#   ./BUILD_OFFLINE.sh --provenance   the same rebuild with SLSA v1 build provenance (mode=max) attached to the OCI
#                                     image, generated by BuildKit, not by any build step. Run on your own hardened,
#                                     isolated build platform and sign that provenance with a key the build cannot
#                                     reach, and the result meets SLSA Build Level 3 (see REBUILD.md). The image
#                                     digest is the same either way.
# =============================================================================
set -euo pipefail
PROVENANCE=0
for arg in "$@"; do
  case "$arg" in
    --provenance) PROVENANCE=1 ;;
    -h|--help) sed -n '2,20p' "$0"; exit 0 ;;

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