Update install starship command for apple arm

dot_local/bin/executable_install-starship

@@ -2,19 +2,31 @@
 
 source "${XDG_DATA_HOME}/buddy-up/includes/utils.sh"
 
-function get_os () {
+main () (
+    APP=starship
+    VERSION=${VERSION:-1.21.1}
+    DEST="${XDG_DATA_HOME}/apps/releases/${APP}"
+    URL=https://github.com/starship/starship/releases/download/v${VERSION}/starship-$(get_arch)-$(get_os).tar.gz
+
+    extract_tarball "${URL}" "${DEST}/${VERSION}"
+    set_current_link "${DEST}" "${VERSION}"
+    set_link "${XDG_BIN_HOME}/${APP}" "${DEST}" "${APP}"
+)
+
+get_arch () (
+    ARCH=$(uname -m)
+    if [[ $ARCH == 'arm64' ]]; then
+        ARCH=aarch64
+    fi
+    echo $ARCH
+)
+
+get_os () (
     case $(uname -s) in
         Linux*)     echo unknown-linux-gnu;;
         Darwin*)    echo apple-darwin;;
         *)          >&2 echo "unsupported os: $(uname -s)"; exit 1;;
     esac
-}
-
-APP=starship
-VERSION=${VERSION:-1.21.1}
-DEST="${XDG_DATA_HOME}/apps/releases/${APP}"
-URL=https://github.com/starship/starship/releases/download/v${VERSION}/starship-$(uname -m)-$(get_os).tar.gz
+)
 
-extract_tarball "${URL}" "${DEST}/${VERSION}"
-set_current_link "${DEST}" "${VERSION}"
-set_link "${XDG_BIN_HOME}/${APP}" "${DEST}" "${APP}"
+main "$@"