my-boxen/script/nuke

#!/usr/bin/ruby

require "optparse"

unless ENV["USER"] == "root"
  exec "sudo", $0, *ARGV
end

all       = false
force     = false
opt       = false
services  = false
receipts  = false
gitconfig = false

OptionParser.new do |o|
  o.banner = "Remove most traces of Boxen from your machine."

  o.on("--all",       "Remove everything possible.")                         { all       = true }
  o.on("--force",     "Actually do it.")                                     { force     = true }
  o.on("--help",      "Show this help.")                                     { abort o.to_s    }
  o.on("--opt",       "Remove /opt/boxen.")                                  { opt       = true }
  o.on("--services",  "Remove and unload services.")                         { services  = true }
  o.on("--receipts",  "Remove package receipts used by Puppet.")             { receipts  = true }
  o.on("--gitconfig", "Remove Boxen-provided git credential helper config.") { gitconfig = true }

  o.parse!

  abort o.to_s unless all || opt || services || receipts || gitconfig
end

unless force
  warn "** I won't actually do anything unless you pass --force."
end

if all || services
  boxen_services = []
  boxen_services << Dir["/Library/Launch*/dev.*.plist"]

  boxen_services.flatten.each do |plist|
    warn "-> Removing #{plist}."

    if force
      system "launchctl", "unload", "-w", plist
      system "rm", "-f", plist
    end
  end

  system "rm", "-f", "/etc/resolver/dev"
end

if all || opt
  warn "-> Removing /opt/boxen."
  system "rm", "-rf", "/opt/boxen" if force
end

if all || receipts
  warn "-> Removing /var/db/.puppet_*."
  # can't use a bare system call here, because we need globbing.
  system 'sh -c "rm -rf /var/db/.puppet_*"' if force
end

if all || gitconfig
  warn "-> Removing git credential helper config."
  system "/usr/bin/git", "config", "--global", "--unset", "credential.helper"
end