release: prepare release process

Started adding a release propecess to our repositority

.gitattributes

@@ -0,0 +1,8 @@
+# Configuration for 'git archive'
+# see https://git-scm.com/docs/git-archive/2.40.0#ATTRIBUTES
+# Exclude a bunch of paths to save some disk space
+e2e export-ignore
+.aspect export-ignore
+.github export-ignore
+dev export-ignore
+remap_tar_test export-ignore

.github/workflows/release.yml

@@ -0,0 +1,29 @@
+# Cut a release whenever a new tag is pushed to the repo.
+# You should use an annotated tag, like `git tag -a v1.2.3`
+# and put the release notes into the commit message for the tag.
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Prepare release
+        run: .github/workflows/release_prep.sh > release_notes.txt
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          prerelease: true
+          # Use GH feature to populate the changelog automatically
+          generate_release_notes: true
+          body_path: release_notes.txt
+          files: |
+            rules_booking-*.tar.gz
+          fail_on_unmatched_files: true

.github/workflows/release_prep.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+
+set -o errexit -o nounset -o pipefail
+set -x
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+# Set by GH actions, see
+# https://docs.github.com/en/actions/learn-github-actions/environment-variables#default-environment-variables
+
+# The prefix is chosen to match what GitHub generates for source archives
+PREFIX="rules_booking-${GITHUB_REF_NAME}"
+ARCHIVE="${PREFIX}.tar.gz"
+ARCHIVE_TMP=$(mktemp)
+
+# NB: configuration for 'git archive' is in /.gitattributes
+git archive --format=tar --prefix=${PREFIX}/ --worktree-attributes  ${GITHUB_REF_NAME} > $ARCHIVE_TMP
+
+# we could patch the tar here if we needed binaries
+
+gzip < $ARCHIVE_TMP > $ARCHIVE
+SHA=$(shasum -a 256 $ARCHIVE | awk '{print $1}')
+INTEGRITY=$(openssl dgst -sha256 -binary $ARCHIVE | openssl base64 -A | sed 's/^/sha256-/')
+
+# Set by GH actions, see
+# https://docs.github.com/en/actions/learn-github-actions/environment-variables#default-environment-variables
+REPO_URL="https://github.com/${GITHUB_REPOSITORY:-bookingcom/rules_booking}"
+
+cat << EOF
+## Using [Bzlmod] with Bazel 6:
+
+Add to your \`MODULE.bazel\` file:
+
+\`\`\`starlark
+bazel_dep(name = "rules_booking", version = "${GITHUB_REF_NAME:1}")
+
+archive_override(
+    module_name = "rules_booking",
+    integrity = "${INTEGRITY}",
+    strip_prefix = "${PREFIX}",
+    urls = [
+        "${REPO_URL}/releases/download/${GITHUB_REF_NAME}/${ARCHIVE}",
+    ]
+)
+
+\`\`\`
+
+[Bzlmod]: https://bazel.build/build/bzlmod
+
+## Using WORKSPACE
+
+\`\`\`starlark
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+http_archive(
+    name = "rules_booking",
+    sha256 = "${SHA}",
+    strip_prefix = "${PREFIX}",
+    url = "${REPO_URL}/releases/download/${GITHUB_REF_NAME}/${ARCHIVE}",
+)
+
+load(
+    "@rules_booking//:repositories.bzl",
+    rules_booking_repositories = "repositories",
+)
+
+rules_booking_repositories()
+
+load(
+    "@rules_booking//:dependencies.bzl",
+    rules_booking_dependencies = "dependencies",
+)
+
+rules_booking_dependencies()
+
+\`\`\`
+EOF