Dnsmasq config for OS X

dnsmasq.sh

#!/usr/bin/env bash

# Resolve dev domains locally and passthrough other DNS requests

set -e

dnsmasq_installed=`brew list | grep dnsmasq`
if [ -n "$dnsmasq_installed"]; then
  echo "Installing Dnsmasq..."
  brew install dnsmasq
else
  echo "Dnsmasq is already installed. Skipping."
fi

# .dev is now a legit domain, so this resolver need higher priority
echo "Adding resolver for .dev domain..."
sudo mkdir -p /etc/resolver
sudo tee /etc/resolver/dev >/dev/null <<EOF
nameserver 127.0.0.1
search_order 1
EOF
echo "Clearing local DNS cache..."
sudo dscacheutil -flushcache

echo "Listing list of DNS resolvers..."
scutil --dns

echo "Configuring Dnsmasq..."
tee /usr/local/etc/dnsmasq.conf >/dev/null <<EOF
strict-order
listen-address=127.0.0.1
address=/.dev/127.0.0.1
EOF

running_dnsmasq=`brew services list | grep 'dnsmasq.*started'`
if [ -n "$running_dnsmasq" ]; then
  echo "Stopping Dnsmasq service..."
  sudo brew services stop dnsmasq
fi

dns_list=(127.0.0.1)
dns_list+=($(sudo networksetup -getdnsservers Wi-Fi | grep -v 127.0.0.1))

echo "Updating DNS order in Network Preferences: ${dns_list[@]}"

echo "Starting Dnsmasq service..."

sudo brew services start dnsmasq

dig_cmd="dig some.random.domain.dev +short"
dig_res=`$dig_cmd`
if [ "$dig_res" != "127.0.0.1" ]; then
  echo "Expected '$dig_cmd' to resolve to 127.0.0.1, but got '$dig_res' instead"
  exit 1
else
  echo ".dev domain resolves without specifying the resolver"
fi

dig_cmd="dig some.random.domain.dev +short @127.0.0.1"
dig_res=`$dig_cmd`
if [ "$dig_res" != "127.0.0.1" ]; then
  echo "Expected '$dig_cmd' to resolve to 127.0.0.1, but got '$dig_res' instead"
  exit 1
else
  echo ".dev domain resolves with resolver set to 127.0.0.1"
fi

dig_cmd="dig google.com +short"
dig_res=`$dig_cmd`
if [ "$dig_res" = "127.0.0.1" ]; then
  echo "Expected '$dig_cmd' to resolve to non-local IP, but got '$dig_res' instead"
  exit 1
else
  echo "google.com domain resolves without specifying the resolver"
fi

dig_cmd="dig google.com +short @127.0.0.1"
dig_res=`$dig_cmd`
if [ "$dig_res" = "127.0.0.1" ]; then
  echo "Expected '$dig_cmd' to resolve to non-local IP, but got '$dig_res' instead"
  exit 1
else
  echo "google.com domain resolves with resolver set to 127.0.0.1"
fi