ci: add semantic release and build/publish python wheel (#41)

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

.github/scripts/release.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+set -e  # trigger failure on error - do not remove!
+set -x  # display command on output
+
+if [ -z "${TARGET_VERSION}" ]; then
+    >&2 echo "No TARGET_VERSION specified"
+    exit 1
+fi
+CHGLOG_FILE="${CHGLOG_FILE:-CHANGELOG.md}"
+
+# update package version
+poetry version "${TARGET_VERSION}"
+
+# collect release notes
+REL_NOTES=$(mktemp)
+poetry run semantic-release changelog --unreleased >> "${REL_NOTES}"
+
+# update changelog
+TMP_CHGLOG=$(mktemp)
+TARGET_TAG_NAME="v${TARGET_VERSION}"
+RELEASE_URL="$(gh repo view --json url -q ".url")/releases/tag/${TARGET_TAG_NAME}"
+printf "## [${TARGET_TAG_NAME}](${RELEASE_URL}) - $(date -Idate)\n\n" >> "${TMP_CHGLOG}"
+cat "${REL_NOTES}" >> "${TMP_CHGLOG}"
+if [ -f "${CHGLOG_FILE}" ]; then
+    printf "\n" | cat - "${CHGLOG_FILE}" >> "${TMP_CHGLOG}"
+fi
+mv "${TMP_CHGLOG}" "${CHGLOG_FILE}"
+
+# push changes
+git config --global user.name 'github-actions[bot]'
+git config --global user.email 'github-actions[bot]@users.noreply.github.com'
+git add pyproject.toml "${CHGLOG_FILE}"
+COMMIT_MSG="chore: bump version to ${TARGET_VERSION} [skip ci]"
+git commit -m "${COMMIT_MSG}"
+git push origin main
+
+# create GitHub release (incl. Git tag)
+gh release create "${TARGET_TAG_NAME}" -F "${REL_NOTES}"