add gh release script

release.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+set -e
+if [ ! -d "build" ]; then
+	./build.sh
+fi
+
+date +"%y%m%d-%H%M" > build/.date
+
+## Get latest tag ID
+CI_TAG_ID=$(git tag | tail -n 1)
+if [ -z "${CI_TAG_ID}" ]; then
+	CI_TAG_ID="v0.0.0";
+fi
+CI_TAG_AUTO="$(echo ${CI_TAG_ID} | awk -F'.' '{print $1 "." $2}').$(<build/.date)"
+
+function github_release {
+	TAG="$1"
+	NAME="$2"
+	latest_tag=$(git describe --tags `git rev-list --tags --max-count=1`)
+	comparison="$latest_tag..HEAD"
+	if [ -z "$latest_tag" ]; then
+		comparison="";
+	fi
+	changelog=$(git log $comparison --oneline --no-merges)
+	echo "Creating release $1: $2"
+	github-release release \
+		--user titpetric \
+		--repo undock \
+		--tag "$1" \
+		--name "$2" \
+		--description "$changelog"
+}
+
+function github_upload {
+	echo "Uploading $2 to $1"
+	github-release upload \
+		--user titpetric \
+		--repo undock \
+		--tag "$1" \
+		--name "$(basename $2)" \
+		--file "$2"
+}
+
+## Release to GitHub
+github_release ${CI_TAG_AUTO} "$(date)"
+FILES=$(find build -type f | grep gz$)
+for FILE in $FILES; do
+	github_upload ${CI_TAG_AUTO} "$FILE"
+done