docs : Automate release notes

This patch adds a script to generate release notes.

Usage
./docs/release_notes.sh <start-commit/tag> <New-version>

start-commit/tag is the commit to start to get git changes.

Example:

$./docs/release_notes.sh 3.0.0-alpha.5 3.0.0.beta.1

Fixes #409

Signed-off-by: Jose Carlos Venegas Munoz <[email protected]>

docs/release_notes.sh

@@ -0,0 +1,92 @@
+#!/bin/bash
+
+script_dir=$(dirname "$0")
+
+source "${script_dir}/../versions.txt"
+from_commit="$1"
+new_release="$2"
+
+usage(){
+	echo "Usage $0 <commit/tag> [new-release-version]"
+	echo "commit/tag: will be used as start point to get release notes"
+	echo "new-release: new release version that will have the "
+	exit -1
+}
+
+if [ -z "$from_commit" ]; then
+	usage
+fi
+
+git fetch --tags
+
+if [ -z "$new_release" ] ;then
+	runtime_version=$(cat "${script_dir}/../VERSION")
+else
+	runtime_version="${new_release}"
+fi
+
+if git describe --exact-match --tags HEAD 2> /dev/null ;then 
+	commit_id="$(git describe --exact-match --tags HEAD)"
+else
+	commit_id="$(git rev-parse HEAD)"
+fi
+
+
+
+changes(){
+	echo "## Changes"
+	git log --merges  "$from_commit"..HEAD  | awk '/Merge pull/{getline; getline;print }'  | \
+		while read -r pr
+		do
+			echo "- ${pr}"
+		done
+
+	echo ""
+
+	echo "## Shortlog"
+	for cr in  $(git log --merges  "$from_commit"..HEAD  | grep 'Merge:' | awk '{print $2".."$3}');
+	do
+		git log --oneline "$cr"
+	done
+}
+
+limitations(){
+	 grep -P '^###\s|^####\s|See issue' "${script_dir}/limitations.md"
+}
+
+cat << EOT
+# Release ${runtime_version}
+
+$(changes)
+
+## Compatibility with Docker
+Clear Containers ${runtime_version} is compatible with Docker ${docker_version}
+## OCI Runtime Specification
+Clear Containers ${runtime_version} support the OCI Runtime Specification [${oci_spec_version}][ocispec]
+
+## Clear Linux Containers image
+Clear Containers ${runtime_version} requires at least Clear Linux containers image [${clear_vm_image_version}][clearlinuximage]
+
+## Clear Linux Containers Kernel
+Clear Containers ${runtime_version} requires at least Clear Linux Containers  kernel [${clear_container_kernel}][kernel]
+
+## Installation
+- [Ubuntu][ubuntu]                                         
+- [Fedora][fedora]                                         
+- [Developers][developers]                                         
+
+
+## Issues & limitations
+
+$(limitations)
+More information [Limitations][limitations]
+
+[clearlinuximage]: https://download.clearlinux.org/releases/${clear_vm_image_version}/clear/clear-${clear_vm_image_version}-containers.img.xz
+[kernel]: https://github.com/clearcontainers/linux/tree/${clear_container_kernel}
+[ocispec]: https://github.com/opencontainers/runtime-spec/releases/tag/${oci_spec_version}
+[limitations]: https://github.com/clearcontainers/runtime/blob/${commit_id}/docs/limitations.md
+[ubuntu]: https://github.com/clearcontainers/runtime/blob/${commit_id}/docs/ubuntu-installation-guide.md
+[fedora]: https://github.com/clearcontainers/runtime/blob/${commit_id}/docs/fedora-installation-guide.md
+[developers]: https://github.com/clearcontainers/runtime/blob/${commit_id}/docs/developers-clear-containers-install.md
+
+EOT

versions.txt

@@ -0,0 +1,8 @@
+#Clear Containers image from https://download.clearlinux.org/releases/
+clear_vm_image_version=16910 
+#Kernel configuration and patches from https://github.com/clearcontainers/linux
+clear_container_kernel=cc-linux-4.9.35
+#Docker suported version
+docker_version=v17.06-ce
+#Supported OCI spec
+oci_spec_version=1.0.0-rc5