idep-server

#! /bin/bash

################################################################################
#                                  Functions                                   #
################################################################################
function fail() {
    printf "### ERROR ### %s\n" "$@" >&2
    exit 1
}

function info() {
    printf "### INFO  ### %s\n" "$@" >&2
}

################################################################################
#                                     Main                                     #
################################################################################
bindir="$(dirname "$0")"
prefixdir="$(readlink -f "${bindir}/..")"
image="${prefixdir}/libexec/idep.sif"
datadir="${prefixdir}/share/idep/data"


tmp="${TMPDIR:-/tmp/idep}"
mkdir -p "${tmp}" || fail "could not create temp dir '${tmp}'"
mkdir -p "${tmp}/varlog" || fail "could not create '${tmp}/varlog'"
mkdir -p "${tmp}/varlib" || fail "could not create '${tmp}/varlib'"
trap 'rm -rf "${tmp}"' EXIT

# pick a random port in the 49000 - 50000 range. This can still lead to
# conflicts so this is a bit hacky.
port=$(( (RANDOM % 1000) + 49000 ))
info "server will run on port ${port}. Set up a tunnel to view the shiny applications"

# create a config file. Since this is singularity, the server has to run
# as the same user inside the container as outside. This config file
# diverges minimally from the defaults
cat <<__END__ > "${tmp}/shiny-server.conf"
run_as $USER;
preserve_logs true;

server {
  listen $port 127.0.0.1;
  location / {
    site_dir /srv/shiny-server;
    directory_index on;
    app_idle_timeout 900;
    log_dir /var/log/shiny-server;
  }
}
__END__

# run the server
singularity exec \
    -B "${tmp}/shiny-server.conf:/etc/shiny-server/shiny-server.conf" \
    -B "${tmp}/varlog:/var/log/shiny-server" \
    -B "${tmp}/varlib:/var/lib/shiny-server" \
    -B "${datadir}:/srv/data/data92" \
    -B "${tmp}:/tmp" \
    ${image} shiny-server