#!/usr/bin/env ruby

# Install package to site_ruby.
#
# This script installs Facets to site_ruby location
# using Ruby's defualt configuration settings.
# If you want to change these, you can supply command
# line paramters for '--prefix' and/or '--sitedir'.

LIBPATHS = ['lib/core', 'lib/more', 'lib/methods']

require 'rbconfig'
require 'fileutils'

def start_install

  # We need to copy them into site_ruby in the opposite order they
  # would be searched for by require.
  # (Actually order doesn't matter anymore. I've neutered it.)

  libpaths = LIBPATHS

  system_prefix = Config::CONFIG['prefix']
  system_libdir = Config::CONFIG['sitelibdir']

  prefix = system_prefix
  if i = ARGV.index('--prefix')
    prefix = ARGV[i+1]
  end

  libdir = nil

  if i = ARGV.index('--sitedir')
    libdir = ARGV[i+1]
  end

  if ARGV.index('--dryrun') or ARGV.index('--noharm')
    @noharm = true
    include FileUtils::DryRun
  else
    @noharm = false
    include FileUtils
  end

  unless libdir
    if (prefix == system_prefix) then
      libdir = system_libdir
    else
      libdir = File.join(prefix, system_libdir[system_prefix.size..-1])
    end
  end

  # Copy lib files to site_ruby location, in proper order!
  lib_files = Dir.glob("lib/**/*").select{ |f| File.file?(f) }

  libpaths.each do |loc|
    files = lib_files.grep(/^#{loc}/)
    files.each do |file|
      dest = File.dirname(file)
      #dest.sub!('lib/', '')
      #dest.sub!(loc, '')
      dest.sub!(loc, '')
      dest = File.join(libdir, dest)
      if noharm?
        puts "mkdir -p #{dest}" unless File.directory?(dest)
        puts "install -m 0444 #{file} #{dest}"
      else
        mkdir_p dest unless File.directory?(dest)
        install file, dest, :mode => 0444
      end
    end
    lib_files -= files  # speed things up be removing what we've already covered.
  end

  # Copy bin files to site_ruby location.

  bin_files = Dir.glob("bin/*").select{ |f| File.file?(f) }
  bin_files.each do |file|
    dest = File.dirname(file)
    dest = File.join(prefix, dest)
    if noharm?
      puts "mkdir -p #{dest}" unless File.directory?(dest)
      puts "install -m 0555 #{file} #{dest}"
    else
      mkdir_p dest unless File.directory?(dest)
      install file, dest, :mode => 0555
    end
  end

end

def noharm?; @noharm; end

# Start installation.
start_install