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YAML

name: Podman Manifest Publish
description: Create and push OCI multi-arch manifests with Podman to registry.noctrl.eu.
inputs:
image-name:
description: Repository/image name path, for example noctrl/gitea-runner
required: true
manifest-tag:
description: Final manifest tag to publish, for example v1.2.3
required: true
source-tags:
description: |
Source image tags to include in the manifest.
Supports newline, comma, or space separated values.
Example: "v1.2.3-tmp-123-amd64\nv1.2.3-tmp-123-arm64"
required: true
registry-username:
description: Registry username for login.
required: true
registry-password:
description: Registry password for login.
required: true
runs:
using: composite
steps:
- id: initialize
shell: bash
run: |
set -euo pipefail
rm -rf "${RUNNER_TEMP}/podman-root" "${RUNNER_TEMP}/podman-runroot"
mkdir -p "${RUNNER_TEMP}/podman-root" "${RUNNER_TEMP}/podman-runroot"
podman_base_args=(
--root "${RUNNER_TEMP}/podman-root"
--runroot "${RUNNER_TEMP}/podman-runroot"
)
selected_driver="vfs"
selected_storage_opt=""
# Prefer overlay with fuse-overlayfs when available and functional.
if [[ -c /dev/fuse ]] && command -v fuse-overlayfs >/dev/null 2>&1; then
fuse_path="$(command -v fuse-overlayfs)"
candidate_storage_opt="overlay.mount_program=${fuse_path}"
if podman "${podman_base_args[@]}" --storage-driver overlay --storage-opt "${candidate_storage_opt}" info >/dev/null 2>&1; then
selected_driver="overlay"
selected_storage_opt="${candidate_storage_opt}"
echo "Using overlay storage driver with fuse-overlayfs (${fuse_path})."
else
echo "overlay+fuse-overlayfs probe failed; falling back to vfs."
fi
else
echo "overlay+fuse prerequisites missing; using vfs."
fi
echo "PODMAN_STORAGE_DRIVER=${selected_driver}" >> "${GITHUB_ENV}"
echo "PODMAN_STORAGE_OPT=${selected_storage_opt}" >> "${GITHUB_ENV}"
mapfile -t source_tags < <(printf '%s\n' "${{ inputs.source-tags }}" | tr ', ' '\n\n' | sed '/^$/d')
if [[ ${#source_tags[@]} -eq 0 ]]; then
echo "ERROR: no tags resolved from inputs.source-tags" >&2
exit 1
fi
- id: login
shell: bash
run: |
set -euo pipefail
: "${PODMAN_STORAGE_DRIVER:=vfs}"
: "${PODMAN_STORAGE_OPT:=}"
podman_args=(
--root "${RUNNER_TEMP}/podman-root"
--runroot "${RUNNER_TEMP}/podman-runroot"
--storage-driver "${PODMAN_STORAGE_DRIVER}"
)
if [[ -n "${PODMAN_STORAGE_OPT}" ]]; then
podman_args+=(--storage-opt "${PODMAN_STORAGE_OPT}")
fi
echo "Logging in to registry: registry.noctrl.eu"
echo "${{ inputs.registry-password }}" | podman "${podman_args[@]}" login registry.noctrl.eu -u "${{ inputs.registry-username }}" --password-stdin
- id: publish-manifest
shell: bash
run: |
set -euo pipefail
: "${PODMAN_STORAGE_DRIVER:=vfs}"
: "${PODMAN_STORAGE_OPT:=}"
podman_args=(
--root "${RUNNER_TEMP}/podman-root"
--runroot "${RUNNER_TEMP}/podman-runroot"
--storage-driver "${PODMAN_STORAGE_DRIVER}"
)
if [[ -n "${PODMAN_STORAGE_OPT}" ]]; then
podman_args+=(--storage-opt "${PODMAN_STORAGE_OPT}")
fi
image_base="registry.noctrl.eu/${{ inputs.image-name }}"
target_ref="docker://${image_base}:${{ inputs.manifest-tag }}"
manifest_name="manifest-${{ github.run_id }}-${{ github.job }}"
cleanup() {
podman "${podman_args[@]}" manifest rm "${manifest_name}" >/dev/null 2>&1 || true
}
trap cleanup EXIT
echo "Creating manifest ${target_ref} from tags:"
podman "${podman_args[@]}" manifest create "${manifest_name}"
while IFS= read -r tag; do
[[ -z "${tag}" ]] && continue
source_ref="docker://${image_base}:${tag}"
echo " ${source_ref}"
podman "${podman_args[@]}" manifest add "${manifest_name}" "${source_ref}"
done < <(printf '%s\n' "${{ inputs.source-tags }}" | tr ', ' '\n\n' | sed '/^$/d')
podman "${podman_args[@]}" manifest push --all "${manifest_name}" "${target_ref}"
podman "${podman_args[@]}" manifest rm "${manifest_name}"
trap - EXIT