Largest RPATH in /nix/store/*/bin

rpath.rb

#!/usr/bin/env ruby
require 'find'
require 'elftools'

STORE = "/nix/store/*/bin/*"
puts "Searching /nix/store for rpath entries."


seen = 0
current = ""

enum = Dir.glob(STORE).lazy.map do | path|

    seen += 1
    current = path

    next ["", "", 0] unless File.file? path
    # some .debug files have a crazy amount of dynamic tags
    next ["", "", 0] if path.end_with? ".debug"
    begin
        file = ELFTools::ELFFile.new(File.open(path))
        sections = file.sections_by_type(:dynamic)
        next ["", "", 0] if sections.nil? || sections.count.zero?
        section = sections.map do |section|
            rpath = section.tag_by_type(ELFTools::Constants::DT_RUNPATH).value.split(':')
            [path, rpath, rpath.count]
        end.max do |a, b|
            a[2] <=> b[2] 
        end
        next section
    rescue => e
        # do nothing
        # puts e
        next ["", "", 0]
    end
end

Thread.new do
    while true do
        puts "Seen: #{seen} Current: #{current}"
        sleep 30
    end
end

max = enum.max do |a, b|
    a[2] <=> b[2] 
end

puts max

You'll need to do gem install --user elftools or the equivalent.
I need to make this a real package and Nix package it.... I know!