release-notes.sh

#!/usr/bin/env bash
# Copyright (c) 2018 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#

[ -z "${DEBUG}" ] || set -x
set -o errexit
set -o nounset
set -o pipefail

script_dir=$(dirname "$0")

readonly script_name="$(basename "${BASH_SOURCE[0]}")"
readonly script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
readonly project="kata-containers"
readonly tmp_dir=$(mktemp -d -t release-notes-tmp.XXXXXXXXXX)

# shellcheck source=../scripts/lib.sh
source "${script_dir}/../scripts/lib.sh"

exit_handler() {
	[ -d "${tmp_dir}" ] || rm -rf "${tmp_dir}"
}
trap exit_handler EXIT

usage() {
	return_code=${1:-}
	cat <<EOF
Usage ${script_name} <previous-release> <new_release>

Args:

previous-release: will be used as start point to get release notes
new-release:      new release version that will have the

Example:
./${script_name} 1.2.0 1.2.1 > notes.md

EOF
	exit "${return_code}"
}

repos=(
	"kata-containers"
)

get_release_info() {

	docker_version=$(get_from_kata_deps "externals.docker.version")
	crio_version=$(get_from_kata_deps "externals.crio.version")
	containerd_version=$(get_from_kata_deps "externals.containerd.version")
	kubernetes_version=$(get_from_kata_deps "externals.kubernetes.version")
	oci_spec_version=$(get_from_kata_deps "specs.oci.version")

	libseccomp_version=$(get_from_kata_deps "externals.libseccomp.version")
	libseccomp_url=$(get_from_kata_deps "externals.libseccomp.url")

	#Image information
	image_info=$(get_from_kata_deps "assets.image")

	# Initrd information
	initrd_info=$(get_from_kata_deps "assets.initrd")

	kernel_version=$(get_from_kata_deps "assets.kernel.version")
	kernel_url=$(get_from_kata_deps "assets.kernel.url")

	kata_kernel_config_version="${new_release}-kernel-config"
	kata_kernel_config_version="${new_release}-kernel-config"

	runtime_version=${new_release}
}

changes() {
	echo "**FIXME - message this section by hand to produce a summary please**"

	echo "### Shortlog"
	for cr in $(git log --merges "${previous_release}".."${new_release}" | grep 'Merge:' | awk '{print $2".."$3}'); do
		git log --oneline "$cr"
	done
}

print_release_notes() {
	cat <<EOF
# Release ${runtime_version}

EOF

	for repo in "${repos[@]}"; do
		git clone -q "https://github.com/${project}/${repo}.git" "${tmp_dir}/${repo}"
		pushd "${tmp_dir}/${repo}" >>/dev/null

		cat <<EOF
## ${repo} Changes
$(changes)

EOF
		popd >>/dev/null
		rm -rf "${tmp_dir}/${repo}"
	done

	cat <<EOF

## Compatibility with CRI-O
Kata Containers ${runtime_version} is compatible with CRI-O ${crio_version}

## Compatibility with containerd
Kata Containers ${runtime_version} is compatible with contaienrd ${containerd_version}

## OCI Runtime Specification
Kata Containers ${runtime_version} support the OCI Runtime Specification [${oci_spec_version}][ocispec]

## Compatibility with Kubernetes
Kata Containers ${runtime_version} is compatible with Kubernetes ${kubernetes_version}

## Libseccomp Notices
The \`kata-agent\` binaries inside the Kata Containers images provided with this release are
statically linked with the following [GNU LGPL-2.1][lgpl-2.1] licensed libseccomp library.

* [\`libseccomp\`][libseccomp]

The \`kata-agent\` uses the libseccomp v${libseccomp_version} which is not modified from the upstream version.
However, in order to comply with the LGPL-2.1 (§6(a)), we attach the complete source code for the library.

If you want to use the \`kata-agent\` which is not statically linked with the library, you can build
a custom \`kata-agent\` that does not use the library from sources.
For the details, please check the [developer guide][custom-agent-doc].

## Kata Linux Containers image
Agent version: ${new_release}

### Default Image Guest OS:
${image_info}

### Default Initrd Guest OS:
${initrd_info}

## Kata Containers builder images
The majority of the components of the project were built using containers.  In order to do a step towards
build reproducibility we publish those container images, and when those are used combined with the version
of the projects listed as part of the "versions.yaml" file, users can get as close to the environment we
used to build the release artefacts.
* agent (on all its different flavours): $(get_agent_image_name)
* Kernel (on all its different flavours): $(get_kernel_image_name)
* OVMF (on all its different flavours): $(get_ovmf_image_name)
* QEMU (on all its different flavurs): $(get_qemu_image_name)
* shim-v2: $(get_shim_v2_image_name)
* tools: $(get_tools_image_name)
* virtiofsd: $(get_virtiofsd_image_name)

The users who want to rebuild the tarballs using exactly the same images can simply use the following environment
variables:
* \`AGENT_CONTAINER_BUILDER\`
* \`KERNEL_CONTAINER_BUILDER\`
* \`OVMF_CONTAINER_BUILDER\`
* \`QEMU_CONTAINER_BUILDER\`
* \`SHIM_V2_CONTAINER_BUILDER\`
* \`TOOLS_CONTAINER_BUILDER\`
* \`VIRTIOFSD_CONTAINER_BUILDER\`

## Kata Linux Containers Kernel
Kata Containers ${runtime_version} suggest to use the Linux kernel [${kernel_version}][kernel]
See the kernel suggested [Guest Kernel patches][kernel-patches]
See the kernel suggested [Guest Kernel config][kernel-config]

## Installation

Follow the Kata [installation instructions][installation].

## Issues & limitations

More information [Limitations][limitations]

[kernel]: ${kernel_url}/linux-${kernel_version#v}.tar.xz
[kernel-patches]: https://github.com/kata-containers/kata-containers/tree/${new_release}/tools/packaging/kernel/patches
[kernel-config]: https://github.com/kata-containers/kata-containers/tree/${new_release}/tools/packaging/kernel/configs
[ocispec]: https://github.com/opencontainers/runtime-spec/releases/tag/${oci_spec_version}
[libseccomp]: ${libseccomp_url}
[lgpl-2.1]: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
[custom-agent-doc]: https://github.com/kata-containers/kata-containers/blob/main/docs/Developer-Guide.md#build-a-custom-kata-agent---optional
[limitations]: https://github.com/kata-containers/kata-containers/blob/${new_release}/docs/Limitations.md
[installation]: https://github.com/kata-containers/kata-containers/blob/${new_release}/docs/install
EOF
}

main() {
	previous_release=${1:-}
	new_release=${2:-}
	if [ -z "${previous_release}" ]; then
		echo "previous-release not provided"
		usage 1
	fi
	if [ -z "${new_release}" ]; then
		echo "new-release not provided"
		usage 1
	fi
	get_release_info
	print_release_notes
}

main "$@"