ci: make sure version Cargo.toml matches version in meson.build

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1532>

.gitlab-ci.yml

@@ -317,6 +317,7 @@ check commits:
   script:
     - ci-fairy check-commits --textwidth 0 --no-signed-off-by
     - ci/check-for-symlinks.sh
+    - ci/check-meson-version.sh
 
 clippy:
   extends: '.debian:12-stable'

ci/check-meson-version.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+MESON_VERSION=`head -n5 meson.build | grep ' version\s*:' | sed -e "s/.*version\s*:\s*'//" -e "s/',.*//"`
+CARGO_VERSION=`cat Cargo.toml | grep -A1 workspace.package | grep ^version | sed -e 's/^version = "\(.*\)"/\1/'`
+
+echo "gst-plugins-rs version (meson.build) : $MESON_VERSION"
+echo "gst-plugins-rs version (Cargo.toml)  : $CARGO_VERSION"
+
+if test "x$MESON_VERSION" != "x$CARGO_VERSION"; then
+  echo
+  echo "===> Version mismatch between meson.build and Cargo.toml! <==="
+  echo
+  exit 1;
+fi