scripts: Add mkrelease script

.gitignore

@@ -1 +1,2 @@
 build*/
+release/

scripts/mkrelease.sh

@@ -0,0 +1,37 @@
+#!/bin/sh
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2024 Nikita Travkin <[email protected]>
+
+sign_everything() {
+	old_dir=$PWD
+	cd $1
+	sha256sum -- * > sha256sums.txt
+	gpg --yes --detach-sign sha256sums.txt
+	cd $old_dir
+}
+
+TAG=$(git describe)
+
+echo "Generating \'$TAG\'"
+
+BUILD_DIR="$PWD/build-$TAG"
+BLOB_DIR="$PWD/release/$TAG"
+
+make -j$(nproc) O="$BUILD_DIR"
+mkdir -p "$BLOB_DIR"
+
+cp $BUILD_DIR/*.efi "$BLOB_DIR"
+
+git ls-files --recurse-submodules \
+	| tar 	--sort=name --mtime="@0" \
+		--owner=0 --group=0 --numeric-owner \
+		-caf "$BLOB_DIR/dtbloader-$TAG.tar.gz" -T-
+
+sign_everything "$BLOB_DIR"
+
+echo ==========================================================
+echo Done building!
+echo Now you can push the tag: "git push origin $TAG"
+echo and upload the artifacts from "$BLOB_DIR"
+echo ==========================================================
+