Support Apple arm for rg install

dot_local/bin/executable_install-ripgrep

@@ -1,27 +1,46 @@
 #!/usr/bin/env bash
 
+set -euo pipefail
+
 source "${XDG_DATA_HOME}/buddy-up/includes/utils.sh"
 
-function get_os () {
+main () (
+    APP=rg
+    VERSION=${VERSION:-14.1.1}
+    DEST="${XDG_DATA_HOME}/apps/releases/${APP}"
+    URL=https://github.com/BurntSushi/ripgrep/releases/download/${VERSION}/ripgrep-${VERSION}-$(get_arch)-$(get_os).tar.gz
+
+    set -x
+    extract_tarball "${URL}" "${DEST}/${VERSION}" "--strip-component 1"
+    set +x
+    set_current_link "${DEST}" "${VERSION}"
+    set -x
+
+    mkdir_if_missing "${XDG_CONFIG_HOME}/bash/bashrc.d"
+    mkdir_if_missing "${XDG_CONFIG_HOME}/fish/completions"
+    mkdir_if_missing "${MAN_DIR}"
+
+    set +x
+    set_link "${XDG_BIN_HOME}/rg" "${DEST}" rg
+    set_link "${MAN_DIR}/rg.1" "${DEST}" doc/rg.1
+    set_link "${XDG_CONFIG_HOME}/bash/bashrc.d/ripgrep.sh" "${DEST}" complete/rg.bash
+    set_link "${XDG_CONFIG_HOME}/fish/completions/ripgrep.fish" "${DEST}" complete/rg.fish
+)
+
+get_arch () (
+    MACHINE=$(uname -m)
+    case "$MACHINE" in
+        arm64)  echo aarch64 ;;
+        *)      echo "$MACHINE" ;;
+    esac
+)
+
+get_os () (
     case $(uname -s) in
         Linux*)     echo unknown-linux-musl;;
         Darwin*)    echo apple-darwin;;
         *)          >&2 echo "unsupported os: $(uname -s)"; exit 1;;
     esac
-}
-
-APP=rg
-VERSION=${VERSION:-14.1.0}
-DEST="${XDG_DATA_HOME}/apps/releases/${APP}"
-URL=https://github.com/BurntSushi/ripgrep/releases/download/${VERSION}/ripgrep-${VERSION}-$(uname -m)-$(get_os).tar.gz
-
-extract_tarball "${URL}" "${DEST}/${VERSION}" "--strip-component 1"
-set_current_link "${DEST}" "${VERSION}"
-
-mkdir_if_missing "${XDG_CONFIG_HOME}/bash/bashrc.d"
-mkdir_if_missing "${XDG_CONFIG_HOME}/fish/completions"
+)
 
-set_link "${XDG_BIN_HOME}/rg" "${DEST}" rg
-set_link "${MAN_DIR}/rg.1" "${DEST}" doc/rg.1
-set_link "${XDG_CONFIG_HOME}/bash/bashrc.d/ripgrep.sh" "${DEST}" complete/rg.bash
-set_link "${XDG_CONFIG_HOME}/fish/completions/ripgrep.fish" "${DEST}" complete/rg.fish
+main "$@"