install.erb

#! /bin/bash
set -u
set -e

# Some utility functions.
fail() { echo >&2 "$@"; exit 1; }
warn() { echo >&2 "$@"; }
cmd()  { hash "$1" >&/dev/null; } # portable 'which'

# Log that the broker is finished.
if cmd curl; then
    curl -sL "<%= stage_done_url %>" || fail "curl failed to log broker completion"
elif cmd wget; then
    wget -qO- "<%= stage_done_url %>" || fail "wget failed to log broker completion" &> /dev/null
else
    warn "neither curl nor wget installed; cannot log completion of broker"
fi