Merge pull request #20 from rightscale/automate_release

Automate creating the GitHub Release in the RELEASING.md instructions

RELEASING.md

@@ -12,11 +12,11 @@ This is how to release a new version of `policy_sdk`:
    git tag --annotate --message='Release version vX.Y.Z' vX.Y.Z
    git push --tags
    ```
-4. Create a [GitHub release](https://github.com/rightscale/policy_sdk/releases) from the tag with the ChangeLog contents
-  as the description. Also include links to the binaries for Linux, macOS, and Windows in the description:
-   * Linux: `https://binaries.rightscale.com/rsbin/policy_sdk/vX.Y.Z/right_st-linux-amd64.tgz`
-   * macOS: `https://binaries.rightscale.com/rsbin/policy_sdk/vX.Y.Z/right_st-darwin-amd64.tgz`
-   * Windows: `https://binaries.rightscale.com/rsbin/policy_sdk/vX.Y.Z/right_st-windows-amd64.zip`
+4. Once the [Travis CI tag build](https://travis-ci.com/github/rightscale/policy_sdk/builds) succeeds, run the release script to create a GitHub Release:
+   ```bash
+   ./release.sh
+   ```
+   This script uses the [`hub`](https://hub.github.com/) command line tool for GitHub, you will need to install it using the [Installation](https://github.com/github/hub#installation) instructions for your platform and authenticate it with GitHub before running the script (you can use the `hub release` command to test if you are authenticated correctly).
 
 ## Testing the release
 

release.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+set -e
+
+# use GNU coreutils sort because it supports version sort
+case `uname` in
+(Darwin)
+  sed='gsed'
+  sort='gsort'
+  ;;
+(*)
+  sed='sed'
+  sort='sort'
+  ;;
+esac
+
+# find the latest version tagged in Git
+while read version; do
+  if [[ $version =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+    break
+  fi
+done < <(git tag -l 'v*' | $sort --reverse --version-sort)
+
+# create a GitHub release from the latest version tagged in Git with ChangeLog entries and pre-compiled binary links
+hub release create --file - $version <<EOF
+$version Release
+
+$($sed -nre "/^${version//./\\.} \/ .+\$/,/^$/{/^${version//./\\.} \/ .+\$/d;/^-+$/d;p}" cmd/fpt/ChangeLog.md)
+
+Pre-compiled binaries:
+* Linux: [$version/fpt-linux-amd64.tgz](https://binaries.rightscale.com/rsbin/fpt/$version/fpt-linux-amd64.tgz)
+* macOS: [$version/fpt-darwin-amd64.tgz](https://binaries.rightscale.com/rsbin/fpt/$version/fpt-darwin-amd64.tgz)
+* Windows: [$version/fpt-windows-amd64.zip](https://binaries.rightscale.com/rsbin/fpt/$version/fpt-windows-amd64.zip)
+EOF