class TinyTds::Bin

def exe(name, *args)
  bin = new(name)
  puts bin.info unless args.any? { |x| x == "-q" }
  bin.run(*args)
end

def find_bin
  File.join @root, "bin", name
end

def find_exe
  Gem.ports_bin_and_lib_paths.each do |bin|
    @exts.each do |ext|
      f = File.join bin, "#{name}#{ext}"
      return f if File.exist?(f)
    end
  end
  nil
end

def info
  "[TinyTds][v#{TinyTds::VERSION}][#{name}]: #{path}"
end

def initialize(name)
  @root = Gem.root_path
  @exts = (ENV["PATHEXT"] ? ENV["PATHEXT"].split(";") : [""]) | [".exe"]
  @name = name
  @binstub = find_bin
  @exefile = find_exe
end

def path
  @path ||= (@exefile && File.exist?(@exefile)) ? @exefile : which
end

def run(*args)
  with_ports_paths do
    return nil unless path
    Kernel.system Shellwords.join(args.unshift(path))
    $CHILD_STATUS.to_i
  end
end

def search_paths
  ENV["PATH"].split File::PATH_SEPARATOR
end

def which
  search_paths.each do |path|
    @exts.each do |ext|
      exe = File.expand_path File.join(path, "#{name}#{ext}"), @root
      next if exe == @binstub
      next unless File.executable?(exe)
      return exe
    end
  end
  nil
end

def with_ports_paths
  old_path = ENV["PATH"]
  begin
    ENV["PATH"] = [
      Gem.ports_bin_and_lib_paths,
      old_path
    ].flatten.join File::PATH_SEPARATOR
    yield if block_given?
  ensure
    ENV["PATH"] = old_path
  end
end