feat(release): add reproducible signed artifacts (#19)

scripts/check-release-tag.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+tag="${1:-${GITHUB_REF_NAME:-}}"
+version="$(sed -n 's:.*<RendezvousVersion>\(.*\)</RendezvousVersion>.*:\1:p' "$root/eng/Versions.props")"
+
+if [[ "$tag" != "v$version" ]]; then
+  echo "Release tag $tag does not match central version v$version." >&2
+  exit 1
+fi
+if [[ -n "$(git -C "$root" status --porcelain --untracked-files=normal)" ]]; then
+  echo "Release tag checkout is not clean." >&2
+  exit 1
+fi
+if [[ "$(git -C "$root" tag --points-at HEAD --list "$tag")" != "$tag" ]]; then
+  echo "Release tag $tag does not point at the checked-out commit." >&2
+  exit 1
+fi
+if ! grep -Eq "^## $version - [0-9]{4}-[0-9]{2}-[0-9]{2}$" "$root/CHANGELOG.md"; then
+  echo "CHANGELOG.md must contain a dated heading for $version." >&2
+  exit 1
+fi
+if grep -Eq "^## $version - Unreleased$" "$root/CHANGELOG.md"; then
+  echo "Release $version is still marked Unreleased." >&2
+  exit 1
+fi