Update gomock install script for version 1.6.0

go/.local/bin/install-gomock-home

@@ -5,18 +5,16 @@ set -e
 # shellcheck disable=SC1090
 source "${XDG_DATA_HOME}/buddy-up/includes/utils.sh"
 
-VERSION=${VERSION:-1.5.0}
-DEST="${XDG_DATA_HOME}/buddy-up/apps/gomock"
+APP=mockgen
+VERSION=${VERSION:-1.6.0}
+DEST="${XDG_DATA_HOME}/apps/releases/gomock"
+CURRENT="${DEST}/current"
 URL=https://github.com/golang/mock/releases/download/v${VERSION}/mock_${VERSION}_$(get_os)_$(get_arch).tar.gz
 
 extract_tarball "${URL}" "${DEST}/${VERSION}" "--strip-components 1"
 set_current_link "${DEST}" "${VERSION}"
 
-if [[ -L "$XDG_BIN_HOME/mockgen" ]]; then
-    unlink "$XDG_BIN_HOME/mockgen"
-fi
-
-cd "$XDG_BIN_HOME"
-ln --symbolic \
-    "$(relative_path "${XDG_BIN_HOME}" "${XDG_DATA_HOME}/buddy-up/apps/gomock/current/mockgen")" \
-    mockgen
+unlink_if_set "${XDG_BIN_HOME}/${APP}"
+cd "${XDG_BIN_HOME}" || exit 1
+ln -s "$(relative_path "${XDG_BIN_HOME}" "${CURRENT}/${APP}")" "${APP}"
+cd - &> /dev/null || exit 1