add release-notes.sh

Author: sameersbn

scripts/release-notes.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env sh
+
+RELEASE=${GIT_TAG:-$1}
+
+if [ -z "${RELEASE}" ]; then
+  echo "Usage:"
+  echo "./scripts/release-notes.sh v0.1.0"
+  exit 1
+fi
+
+if ! git rev-list ${RELEASE} >/dev/null 2>&1; then
+  echo "${RELEASE} does not exist"
+  exit
+fi
+
+PREV_RELEASE=${PREV_RELEASE:-$(git describe --tags --abbrev=0 ${RELEASE}^)}
+PREV_RELEASE=${PREV_RELEASE:-$(git rev-list --max-parents=0 ${RELEASE}^)}
+NOTABLE_CHANGES=$(git cat-file -p ${RELEASE} | sed '/-----BEGIN PGP SIGNATURE-----/,//d' | tail -n +6)
+CHANGELOG=$(git log --no-merges --pretty=format:'- [%h] %s (%aN)' ${PREV_RELEASE}..${RELEASE})
+if [ $? -ne 0 ]; then
+  echo "Error creating changelog"
+  exit 1
+fi
+
+cat <<EOF
+${NOTABLE_CHANGES}
+
+## Docker Images for sameersbn/postgresql:${RELEASE}
+
+- [docker.io](https://hub.docker.com/r/sameersbn/postgresql/tags)
+- [quay.io](https://quay.io/repository/sameersbn/postgresql?tag=${RELEASE}&tab=tags)
+
+## Installation
+
+For installation and usage instructions please refer to the [README](https://github.com/sameersbn/docker-postgresql/blob/${RELEASE}/README.md)
+
+## Contributing
+
+If you find this image useful here's how you can help:
+
+- Send a Pull Request with your awesome new features and bug fixes
+- Be a part of the community and help resolve [issues](https://github.com/sameersbn/docker-postgresql/issues)
+- Support the development of this image with a [donation](http://www.damagehead.com/donate/)
+
+## Changelog
+
+${CHANGELOG}
+EOF