Add release workflow

Signed-off-by: Michael Carroll <[email protected]>

.github/workflows/release.yml

@@ -0,0 +1,14 @@
+name: Release
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+jobs:
+  release:
+    uses: bazel-contrib/.github/.github/workflows/release_ruleset.yaml@v6
+    permissions:
+      contents: write
+    with:
+      release_files: rules_gz-*.tar.gz
+      prerelease: false

.github/workflows/release_prep.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+# invoked by release workflow
+# (via https://github.com/bazel-contrib/.github/blob/master/.github/workflows/release_ruleset.yaml)
+
+set -o errexit -o nounset -o pipefail
+
+RULES_NAME="rules_gz"
+TAG="${GITHUB_REF_NAME}"
+PREFIX="${RULES_NAME}-${TAG:1}"
+ARCHIVE="${RULES_NAME}-${TAG:1}.tar.gz"
+
+# embed version in MODULE.bazel
+perl -pi -e "s/version = \"0\.0\.0\",/version = \"${TAG:1}\",/g" MODULE.bazel
+
+stash_name=`git stash create`;
+git archive --format=tar --prefix=${PREFIX}/ "${stash_name}" | gzip > $ARCHIVE
+
+SHA=$(shasum -a 256 $ARCHIVE | awk '{print $1}')
+
+cat << EOF
+Add to your \`MODULE.bazel\` file:
+
+\`\`\`starlark
+bazel_dep(name = "${RULES_NAME}", version = "${TAG:1}")
+\`\`\`
+EOF