# HG changeset patch
# User Cezary Drożak <cezary@drozak.net>
# Date 1652010596 -7200
#      Sun May 08 13:49:56 2022 +0200
# Node ID a87df381dca1e34f69ec8c728f8b0d7e6c1488d0
# Parent  6dbdf32abad7d3af8379a56cc793beea4162eab1
Add update_version.sh script

diff --git a/scripts/update_version.sh b/scripts/update_version.sh
new file mode 100755
--- /dev/null
+++ b/scripts/update_version.sh
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+program=$0
+
+usage() {
+	cat <<-EOF
+		$program <version>
+		Update version in all places and create a Mercurial tag
+	EOF
+}
+
+if [ $# -ne 1 ]; then
+	{
+		echo 'Wrong number of arguments'
+		usage
+	} >&2
+	exit 1
+fi
+
+version=$1
+
+# If the first parameter starts from "v", remove it. It will be prepended in
+# later commands, where needed.
+if [ "${version:0:1}" = 'v' ]; then
+	version=${version:1}
+fi
+
+# Update NPM version. NPM prints the new version to standard output, but we
+# don't need it, so it's yeeted into The Void.
+npm version "$version" >/dev/null
+
+# Update the Rust crate version. Build the package afterwards, so that
+# Cargo.lock gets updated too.
+sed -Ei "s/version\s*=\s*\".+\"/version = \"$version\"/" Cargo.toml
+cargo build
+
+# Now, all is left to do, is to create a commit and a tag!
+hg commit package{,-lock}.json Cargo.{toml,lock} --message "Bump version to $version"
+hg tag --edit "v$version"