Add check-version.sh script and update source.sh script

source.sh

@@ -2,7 +2,7 @@
 # BPM Expects the source code to be extracted into the automatically created 'source' directory which can be accessed using $BPM_SOURCE
 # BPM Expects the output files to be present in the automatically created 'output' directory which can be accessed using $BPM_OUTPUT
 
-DOWNLOAD="https://download.gnome.org/sources/libhandy/${BPM_PKG_VERSION%.*}/libhandy-${BPM_PKG_VERSION}.tar.xz"
+DOWNLOAD="https://gitlab.gnome.org/GNOME/libhandy/-/archive/${BPM_PKG_VERSION}/libhandy-${BPM_PKG_VERSION}.tar.gz"
 FILENAME="${DOWNLOAD##*/}"
 
 # The prepare function is executed in the root of the temp directory
@@ -15,19 +15,15 @@ prepare() {
 # The build function is executed in the source directory
 # This function is used to compile the source code
 build() {
-  mkdir build
-  cd build
-  
-  meson setup --prefix=/usr --buildtype=release ..
-  meson compile
+  meson setup --prefix=/usr --buildtype=release build
+  meson compile -C build
 }
 
 # The package function is executed in the source directory
 # This function is used to move the compiled files into the output directory
 package() {
-  cd build
-  
-  meson install --destdir="$BPM_OUTPUT"
+  meson install -C build --destdir="$BPM_OUTPUT"
 
+  # Install package license
   install -Dm644 "$BPM_SOURCE"/COPYING "$BPM_OUTPUT"/usr/share/licenses/libhandy/COPYING
 }