Add a script to generate release artifacts

.gitignore

@@ -1,3 +1,4 @@
 _build/
 _opam/
+_artifacts/
 *.install

README.md

@@ -69,6 +69,14 @@ with the following command.
 yay -S spatial-shell
 ```
 
+### Official Binary Builds
+
+Starting with Spatial Shell 5th release, binary builds are attached to GitHub
+releases for Linux (x86_64).
+
+Signatures are provided as well. The maintainer public key is
+[`320E11CB5316864648593D5E14CD43A3866E4C18`][pubkey].
+
 ## Getting Started
 
 ### Configuring Your Favorite WM
@@ -151,3 +159,4 @@ of this project, including for the wording of several man pages.
 [min-config]: ./contrib/sway/spatial.conf
 [waybar]: https://github.com/Alexays/Waybar
 [contrib-dir]: ./contrib/
+[pubkey]: https://soap.coffee/~lthms/files/lthms@soap.coffee.pub

scripts/prepare-release-artifacts.sh

@@ -0,0 +1,77 @@
+#!/usr/bin/sh
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at https://mozilla.org/MPL/2.0/. *)
+
+set -e
+
+function usage() {
+  echo "Usage: ${0} [-s EMAIL]" 1>&2
+  exit 1
+}
+
+local_user=""
+
+while getopts "s:" o; do
+    case "${o}" in
+        s)
+            local_user=${OPTARG}
+            ;;
+        *)
+            usage
+            ;;
+    esac
+done
+
+function spatial_version() {
+  grep '^version:' spatial-shell.opam | sed 's/version: "\(.*\)"/\1/'
+}
+
+echo "Building artifacts for spatial-shell-$(spatial_version)"
+
+if [ ! -z "$(git status -s)" ]; then
+  echo "You have uncommitted changes. Press enter to continue."
+  read
+
+  if [ ! "$?" = "0" ]; then
+    exit 1
+  fi
+fi
+
+release_name="spatial-shell-$(spatial_version)"
+archive_suffix="-linux-$(uname -m).tar.gz"
+worktree=$(git rev-parse --show-toplevel)
+tmp_workspace="$(mktemp -d)"
+
+if [ -f "_artifacts/${release_name}${archive_suffix}" ]; then
+  echo "_artifacts/${release_name}${archive_suffix} already exists. You need to delete it to run this script."
+  exit 2
+fi
+
+# Building a static distribution
+
+pushd "${tmp_workspace}"
+git clone -q "${worktree}" .
+OCAML_COMPILER=ocaml-option-static,ocaml-option-no-compression,ocaml.5.1.1 make build-deps
+eval $(opam env)
+BUILD_PROFILE=static DESTDIR=artifacts make install
+opam switch remove . -y
+popd
+mkdir -p _artifacts
+mv "${tmp_workspace}/artifacts" "_artifacts/${release_name}"
+
+# Creating the archive
+
+rm -rf "${tmp_workspace}"
+pushd _artifacts
+tar czvf "${release_name}${archive_suffix}" "${release_name}"
+rm -rf ${release_name}
+
+if [ -n "${local_user}" ]; then
+  gpg --local-user "${local_user}" \
+    --out "${release_name}${archive_suffix}.sig" \
+    --detach-sig "${release_name}${archive_suffix}"
+fi
+
+popd