Serve a directory on a port with Nginx, with access logs to STDOUT and error logs to STDERR.

serve.sh

#!/usr/bin/env bash
set -e

usage() {
  echo "usage: serve PORT [DIR]"
  exit 1
}

conf_template='
worker_processes 1;

daemon off;
events {
    worker_connections 1024;
}

error_log "$$ERR_LOG$$";

http {
    include /usr/local/etc/nginx/mime.types;
    default_type text/plain;

    access_log "$$ACC_LOG$$";

    server {
        listen $$PORT$$;

        location / {
            root "$$ROOT$$";
            autoindex on;
        }
    }
}
'

if [[ -z "$1" ]]; then
  usage
else
  port="$1"
fi

if [[ -z "$2" ]]; then
  root="$(cd ./ && pwd)"
else
  root="$(cd "$2" && pwd)"
fi

tmpdir="$(mktemp -dt serve)"
conf="${tmpdir}/conf"
err_log="${tmpdir}/err.log"
acc_log="${tmpdir}/acc.log"
touch "$acc_log" "$err_log"

echo -n "$conf_template" | sed \
    -e "s@\\\$\\\$ERR_LOG\\\$\\\$@${err_log}@" \
    -e "s@\\\$\\\$ACC_LOG\\\$\\\$@${acc_log}@" \
    -e "s@\\\$\\\$PORT\\\$\\\$@${port}@" \
    -e "s@\\\$\\\$ROOT\\\$\\\$@${root}@" > $conf

trap 'kill $(jobs -p)' EXIT
tail -f "$err_log" 1>&2 &
tail -f "$acc_log" &

nginx -p "$root" -c "$conf"