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require 'formula'

class Runit < Formula
  homepage 'http://smarden.org/runit'
  url 'http://smarden.org/runit/runit-2.1.1.tar.gz'
  sha1 '8eee39639dcb79ba251ca4ab2c7cde38059f09c2'

  def install
    # Runit untars to 'admin/runit-VERSION'
    cd "runit-#{version}" do
      # Per the installation doc on OS X, we need to make a couple changes.
      system "echo 'cc -Xlinker -x' >src/conf-ld"
      inreplace 'src/Makefile', / -static/, ''

      inreplace 'src/sv.c', "char *varservice =\"/service/\";", "char *varservice =\"#{var}/service/\";"
      system "package/compile"

      # The commands are compiled and copied into the 'command' directory and
      # names added to package/commands. Read the file for the commands and
      # install them in homebrew.
      rcmds = File.open("package/commands").read

      rcmds.split("\n").each do |r|
        bin.install("command/#{r.chomp}")
        man8.install("man/#{r.chomp}.8")
      end

      (var + "service").mkpath
    end
  end

  def caveats; <<-EOS.undent
    This formula does not install runit as a replacement for init.
    The service directory is #{var}/service instead of /service.

    To have runit ready to run services, start runsvdir:
         runsvdir -P #{var}/service

    Depending on the services managed by runit, this may need to start as root.
    EOS
  end
end