I’m giving squid a spin as a local cache for gems. My goal is to speed up the time git clean -whatever ; bundle install --path .bundle takes.

This solution isn’t perfect. It doesn’t make the bundle install as fast as I’d like. Also, squid needs to be restarted (sudo launchctl stop squid) when I change locations and/or sleep my laptop, because it forgets how to look up DNS (it seems to be caching the DNS server list).

I’m using homebrew and on a Mac running Snow Leopard, so this will be most helpful for anyone running the same.

Install squid

brew install squid

This installed squid 3.1.9.

Configure squid

Open /usr/local/etc/squid.conf, and uncomment the cache_dir line.

Start squid

First, you need to initialize squid. Some of this stuff may be equivalent to throwing your machine under a bus, so please be aware of what you’re copying.

chown nobody /usr/local/var/cache
chgrp everyone /usr/local/var/logs
chmod g+w /usr/local/var/logs
sudo squid -z

I wanted squid to run any time the machine is running. So, I created /Library/LaunchDaemons/squid.plist to look like this:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>squid</string>
    <key>OnDemand</key>
    <false/>
    <key>ProgramArguments</key>
    <array>
      <string>/usr/local/sbin/squid</string>
      <string>-N</string>
      <string>-d 1</string>
      <string>-D</string>
    </array>
    <key>ServiceIPC</key>
    <false/>
    <key>RunAtLoad</key>
    <true/>
  </dict>
</plist>

Start it by doing sudo launchctl -w /Library/LaunchDaemons/squid.plist

Configure bundler/rubygems

Open ~/.gemrc and add:

http_proxy: http://localhost:3128

My .gemrc looks like this:

---
gem: --no-ri --no-rdoc
http_proxy: http://localhost:3128/
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