Switch to new download format

pkg.info

@@ -22,3 +22,8 @@ make_depends:
   - python3
   - python-packaging
   - shared-mime-info
+downloads:
+  - url: https://download.gnome.org/sources/glib/${BPM_PKG_VERSION%.*}/glib-${BPM_PKG_VERSION}.tar.xz
+    extract_to: ${BPM_SOURCE}
+    extract_strip_components: 1
+    checksum: 119d1708ca022556d6d2989ee90ad1b82bd9c0d1667e066944a6d0020e2d5e57

source.sh

@@ -2,16 +2,6 @@
 # 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/glib/${BPM_PKG_VERSION%.*}/glib-${BPM_PKG_VERSION}.tar.xz"
-FILENAME="${DOWNLOAD##*/}"
-
-# The prepare function is executed in the root of the temp directory
-# This function is used for downloading files and putting them into the correct location
-prepare() {
-  wget "$DOWNLOAD"
-  tar -xvf "$FILENAME" --strip-components=1 -C "$BPM_SOURCE"
-}
-
 # The build function is executed in the source directory
 # This function is used to compile the source code
 build() {