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#!/usr/bin/env bash
set -e
echo "Prometheus React web UI installer"
if [ "$EUID" != 0 ]; then
echo "This script must be run as root (or via sudo)." >&2
exit 1
fi
PACKAGE_VER=$(dpkg-query -f '${Version}' -W prometheus)
echo "Installed Prometheus package version: $PACKAGE_VER"
DEST_DIR=/usr/share/prometheus/web
if [ ! -d $DEST_DIR ]; then
echo "Destination directory $DEST_DIR does not exist." >&2
exit 1
fi
# Since the React web UI tarball contains dynamically-named files which will change with each
# release, clear out any existing installation first.
rm -rf ${DEST_DIR}/static/react
# Strip Debian version suffix to get back to native upstream version.
UPSTREAM_VER=${PACKAGE_VER%%[+-]*}
echo "Upstream version: $UPSTREAM_VER"
TMP_DIR=$(mktemp -d)
# shellcheck disable=SC2064
trap "rm -rf $TMP_DIR" EXIT
echo "Fetching upstream release web UI tarball..."
wget -P $TMP_DIR -q https://github.com/prometheus/prometheus/releases/download/v${UPSTREAM_VER}/prometheus-web-ui-${UPSTREAM_VER}.tar.gz
echo "Installing React web UI in Prometheus directory..."
tar -x -f ${TMP_DIR}/prometheus-web-ui-${UPSTREAM_VER}.tar.gz -C $DEST_DIR static/react
echo "Prometheus React web UI successfully installed."
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