Add script to install node_exporter for the system

install-scripts/.local/bin/install-node-exporter-system

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+set -e
+set -x
+
+# shellcheck disable=SC1090
+source "${XDG_DATA_HOME}/buddy-up/includes/utils.sh"
+
+APP=node_exporter
+VERSION=${VERSION:-1.1.2}
+APPS_DIR=/usr/local/apps/${APP}
+URL=https://github.com/prometheus/node_exporter/releases/download/v${VERSION}/node_exporter-${VERSION}.$(get_os)-$(get_arch).tar.gz
+
+extract_tarball "${URL}" "${APPS_DIR}/${VERSION}" "--strip-components 1" sudo
+set_current_link "${APPS_DIR}" "${VERSION}" sudo
+
+apps=$(find ${APPS_DIR}/current/ -maxdepth 1 -executable -type f -exec basename {} \;)
+cd /usr/local/bin
+for bin in $apps; do
+    if [[ ! -s $bin ]]; then
+        sudo ln --symbolic \
+            "$(relative_path "/usr/local/bin" "${APPS_DIR}/current/${bin}")" \
+            "${bin}"
+    fi
+done