New formula: openvpn

Formula for OpenVPN version 2.1.1
Recommended dependency on LZO, but not required.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Tweaked path concatenation.

Formula/openvpn.rb

@@ -0,0 +1,87 @@
+require 'formula'
+
+class Openvpn <Formula
+  url 'http://openvpn.net/release/openvpn-2.1.1.tar.gz'
+  homepage 'http://openvpn.net/'
+  md5 'b273ed2b5ec8616fb9834cde8634bce7'
+
+  depends_on 'lzo' => :recommended
+
+  def skip_clean? path
+    path == etc or path == var
+  end
+
+  def install
+    # Build and install binary
+    system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking"
+    system "make install"
+
+    # Adjust sample file paths
+    inreplace ["sample-config-files/openvpn-startup.sh", "sample-scripts/openvpn.init"] do |s|
+      s.gsub! "/etc/openvpn", (etc + 'openvpn')
+      s.gsub! "/var/run/openvpn", (var + 'run/openvpn')
+    end
+
+    # Install sample files
+    Dir['sample-*'].each do |d|
+      (share + 'doc/openvpn' + d).install Dir[d+'/*']
+    end
+
+    # Create etc & var paths
+    (etc + 'openvpn').mkpath
+    (var + 'run/openvpn').mkpath
+
+    # Write the launchd script
+    (prefix + 'org.openvpn.plist').write startup_plist
+  end
+
+  def caveats; <<-EOS
+For OpenVPN to work as a server, you will need to do the following:
+
+1) Create configuration file in #{etc}/openvpn, samples can be
+   found in #{share}/doc/openvpn
+
+2) Install the launchd item in /Library/LaunchDaemons, like so:
+
+   sudo cp -vf #{prefix}/org.openvpn.plist /Library/LaunchDaemons/.
+   sudo chown -v root:wheel /Library/LaunchDaemons/org.openvpn.plist
+
+3) Start the daemon using:
+
+   sudo launchctl load /Library/LaunchDaemons/org.openvpn.plist
+
+Next boot of system will automatically start OpenVPN.
+EOS
+  end
+
+  def startup_plist
+    return <<-EOS
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd";>
+<plist version="1.0">
+<dict>
+	<key>Label</key>
+	<string>org.openvpn</string>
+	<key>ProgramArguments</key>
+	<array>
+		<string>#{sbin}/openvpn</string>
+		<string>--config</string>
+		<string>#{etc}/openvpn/openvpn.conf</string>
+	</array>
+	<key>OnDemand</key>
+	<false/>
+	<key>RunAtLoad</key>
+	<true/>
+	<key>TimeOut</key>
+	<integer>90</integer>
+	<key>WatchPaths</key>
+	<array>
+		<string>#{etc}/openvpn</string>
+	</array>
+	<key>WorkingDirectory</key>
+	<string>#{etc}/openvpn</string>
+</dict>
+</plist>
+EOS
+  end
+end