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#! /usr/bin/env ruby
#--
# Copyright 2004 Austin Ziegler <ruby-install@halostatue.ca>
# Install utility. Based on the original installation script for rdoc by the
# Pragmatic Programmers.
#
# This program is free software. It may be redistributed and/or modified under
# the terms of the GPL version 2 (or later) or the Ruby licence.
#
# Usage
# -----
# In most cases, if you have a typical project layout, you will need to do
# absolutely nothing to make this work for you. This layout is:
#
# bin/ # executable files -- "commands"
# lib/ # the source of the library
# tests/ # unit tests
#
# The default behaviour:
# 1) Run all unit test files (ending in .rb) found in all directories under
# tests/.
# 2) Build Rdoc documentation from all files in bin/ (excluding .bat and .cmd),
# all .rb files in lib/, ./README, ./ChangeLog, and ./Install.
# 3) Build ri documentation from all files in bin/ (excluding .bat and .cmd),
# and all .rb files in lib/. This is disabled by default on Microsoft Windows.
# 4) Install commands from bin/ into the Ruby bin directory. On Windows, if a
# if a corresponding batch file (.bat or .cmd) exists in the bin directory,
# it will be copied over as well. Otherwise, a batch file (always .bat) will
# be created to run the specified command.
# 5) Install all library files ending in .rb from lib/ into Ruby's
# site_lib/version directory.
#
#++

require 'rbconfig'
require 'find'
require 'fileutils'
require 'tempfile'
begin
  require 'ftools' # apparently on some system ftools doesn't get loaded
  $haveftools = true
rescue LoadError
  puts "ftools not found. Using FileUtils instead.."
  $haveftools = false
end
require 'optparse'
require 'ostruct'

begin
  require 'rdoc/rdoc'
  $haverdoc = true
rescue LoadError
  puts "Missing rdoc; skipping documentation"
  $haverdoc = false
end

PREREQS = %w{openssl facter xmlrpc/client xmlrpc/server cgi}
MIN_FACTER_VERSION = 1.5

InstallOptions = OpenStruct.new

def glob(list)
  g = list.map { |i| Dir.glob(i) }
  g.flatten!
  g.compact!
  g.reject! { |e| e =~ /\.svn/ }
  g
end

# Set these values to what you want installed.
configs = glob(%w{conf/auth.conf})
sbins = glob(%w{sbin/*})
bins = glob(%w{bin/*})
rdoc = glob(%w{bin/* sbin/* lib/**/*.rb README README-library CHANGELOG TODO Install}).reject { |e| e=~ /\.(bat|cmd)$/ }
ri = glob(%w{bin/*.rb sbin/* lib/**/*.rb}).reject { |e| e=~ /\.(bat|cmd)$/ }
man = glob(%w{man/man[0-9]/*})
libs = glob(%w{lib/**/*.rb lib/**/*.erb lib/**/*.py lib/puppet/util/command_line/*})
tests = glob(%w{test/**/*.rb})

def do_configs(configs, target, strip = 'conf/')
  Dir.mkdir(target) unless File.directory? target
  configs.each do |cf|
    ocf = File.join(InstallOptions.config_dir, cf.gsub(/#{strip}/, ''))
    if $haveftools
      File.install(cf, ocf, 0644, true)
    else
      FileUtils.install(cf, ocf, {:mode => 0644, :verbose => true})
    end
   end
end

def do_bins(bins, target, strip = 's?bin/')
  Dir.mkdir(target) unless File.directory? target
  bins.each do |bf|
    obf = bf.gsub(/#{strip}/, '')
    install_binfile(bf, obf, target)
  end
end

def do_libs(libs, strip = 'lib/')
  libs.each do |lf|
    olf = File.join(InstallOptions.site_dir, lf.gsub(/#{strip}/, ''))
    op = File.dirname(olf)
    if $haveftools
      File.makedirs(op, true)
      File.chmod(0755, op)
      File.install(lf, olf, 0644, true)
    else
      FileUtils.makedirs(op, {:mode => 0755, :verbose => true})
      FileUtils.chmod(0755, op)
      FileUtils.install(lf, olf, {:mode => 0644, :verbose => true})
    end
  end
end

def do_man(man, strip = 'man/')
  man.each do |mf|
    omf = File.join(InstallOptions.man_dir, mf.gsub(/#{strip}/, ''))
    om = File.dirname(omf)
    if $haveftools
      File.makedirs(om, true)
      File.chmod(0755, om)
      File.install(mf, omf, 0644, true)
    else
      FileUtils.makedirs(om, {:mode => 0755, :verbose => true})
      FileUtils.chmod(0755, om)
      FileUtils.install(mf, omf, {:mode => 0644, :verbose => true})
    end
    gzip = %x{which gzip}
    gzip.chomp!
    %x{#{gzip} -f #{omf}}
  end
end

# Verify that all of the prereqs are installed
def check_prereqs
  PREREQS.each { |pre|
    begin
      require pre
      if pre == "facter"
        # to_f isn't quite exact for strings like "1.5.1" but is good
        # enough for this purpose.
        facter_version = Facter.version.to_f
        if facter_version < MIN_FACTER_VERSION
          puts "Facter version: #{facter_version}; minimum required: #{MIN_FACTER_VERSION}; cannot install"
          exit -1
        end
      end
    rescue LoadError
      puts "Could not load #{pre}; cannot install"
      exit -1
    end
  }
end

##
# Prepare the file installation.
#
def prepare_installation
  $operatingsystem = Facter["operatingsystem"].value

  InstallOptions.configs = true

  # Only try to do docs if we're sure they have rdoc
  if $haverdoc
    InstallOptions.rdoc = true
    InstallOptions.ri = $operatingsystem != "windows"
  else
    InstallOptions.rdoc = false
    InstallOptions.ri = false
  end


  InstallOptions.tests = true

  ARGV.options do |opts|
    opts.banner = "Usage: #{File.basename($0)} [options]"
    opts.separator ""
    opts.on('--[no-]rdoc', 'Prevents the creation of RDoc output.', 'Default on.') do |onrdoc|
      InstallOptions.rdoc = onrdoc
    end
    opts.on('--[no-]ri', 'Prevents the creation of RI output.', 'Default off on mswin32.') do |onri|
      InstallOptions.ri = onri
    end
    opts.on('--[no-]tests', 'Prevents the execution of unit tests.', 'Default on.') do |ontest|
      InstallOptions.tests = ontest
    end
    opts.on('--[no-]configs', 'Prevents the installation of config files', 'Default off.') do |ontest|
      InstallOptions.configs = ontest
    end
    opts.on('--destdir[=OPTIONAL]', 'Installation prefix for all targets', 'Default essentially /') do |destdir|
      InstallOptions.destdir = destdir
    end
    opts.on('--configdir[=OPTIONAL]', 'Installation directory for config files', 'Default /etc/puppet') do |configdir|
      InstallOptions.configdir = configdir
    end
    opts.on('--bindir[=OPTIONAL]', 'Installation directory for binaries', 'overrides Config::CONFIG["bindir"]') do |bindir|
      InstallOptions.bindir = bindir
    end
    opts.on('--sbindir[=OPTIONAL]', 'Installation directory for system binaries', 'overrides Config::CONFIG["sbindir"]') do |sbindir|
      InstallOptions.sbindir = sbindir
    end
    opts.on('--sitelibdir[=OPTIONAL]', 'Installation directory for libraries', 'overrides Config::CONFIG["sitelibdir"]') do |sitelibdir|
      InstallOptions.sitelibdir = sitelibdir
    end
    opts.on('--mandir[=OPTIONAL]', 'Installation directory for man pages', 'overrides Config::CONFIG["mandir"]') do |mandir|
      InstallOptions.mandir = mandir
    end
    opts.on('--quick', 'Performs a quick installation. Only the', 'installation is done.') do |quick|
      InstallOptions.rdoc = false
      InstallOptions.ri = false
      InstallOptions.tests = false
      InstallOptions.configs = true
    end
    opts.on('--full', 'Performs a full installation. All', 'optional installation steps are run.') do |full|
      InstallOptions.rdoc = true
      InstallOptions.ri = true
      InstallOptions.tests = true
      InstallOptions.configs = true
    end
    opts.separator("")
    opts.on_tail('--help', "Shows this help text.") do
      $stderr.puts opts
      exit
    end

    opts.parse!
  end

  version = [Config::CONFIG["MAJOR"], Config::CONFIG["MINOR"]].join(".")
  libdir = File.join(Config::CONFIG["libdir"], "ruby", version)

  # Mac OS X 10.5 and higher declare bindir and sbindir as
  # /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin
  # /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/sbin
  # which is not generally where people expect executables to be installed
  # These settings are appropriate defaults for all OS X versions.
  if RUBY_PLATFORM =~ /^universal-darwin[\d\.]+$/
    Config::CONFIG['bindir'] = "/usr/bin"
    Config::CONFIG['sbindir'] = "/usr/sbin"
  end

  if not InstallOptions.configdir.nil?
    configdir = InstallOptions.configdir
  elsif $operatingsystem == "windows"
    begin
      require 'win32/dir'
    rescue LoadError => e
      puts "Cannot run on Microsoft Windows without the sys-admin, win32-process, win32-dir & win32-service gems: #{e}"
      exit -1
    end
    configdir = File.join(Dir::COMMON_APPDATA, "PuppetLabs", "puppet", "etc")
  else
    configdir = "/etc/puppet"
  end

  if not InstallOptions.bindir.nil?
    bindir = InstallOptions.bindir
  else
    bindir = Config::CONFIG['bindir']
  end

  if not InstallOptions.sbindir.nil?
    sbindir = InstallOptions.sbindir
  else
    sbindir = Config::CONFIG['sbindir']
  end

  if not InstallOptions.sitelibdir.nil?
    sitelibdir = InstallOptions.sitelibdir
  else
    sitelibdir = Config::CONFIG["sitelibdir"]
    if sitelibdir.nil?
      sitelibdir = $LOAD_PATH.find { |x| x =~ /site_ruby/ }
      if sitelibdir.nil?
        sitelibdir = File.join(libdir, "site_ruby")
      elsif sitelibdir !~ Regexp.quote(version)
        sitelibdir = File.join(sitelibdir, version)
      end
    end
  end

  if not InstallOptions.mandir.nil?
    mandir = InstallOptions.mandir
  else
    mandir = Config::CONFIG['mandir']
  end

  # This is the new way forward
  if not InstallOptions.destdir.nil?
    destdir = InstallOptions.destdir
  # To be deprecated once people move over to using --destdir option
  elsif not ENV['DESTDIR'].nil?
    destdir = ENV['DESTDIR']
    warn "DESTDIR is deprecated. Use --destdir instead."
  else
    destdir = ''
  end

  configdir = join(destdir, configdir)
  bindir = join(destdir, bindir)
  sbindir = join(destdir, sbindir)
  mandir = join(destdir, mandir)
  sitelibdir = join(destdir, sitelibdir)

  FileUtils.makedirs(configdir) if InstallOptions.configs
  FileUtils.makedirs(bindir)
  FileUtils.makedirs(sbindir)
  FileUtils.makedirs(mandir)
  FileUtils.makedirs(sitelibdir)

  InstallOptions.site_dir = sitelibdir
  InstallOptions.config_dir = configdir
  InstallOptions.bin_dir = bindir
  InstallOptions.sbin_dir = sbindir
  InstallOptions.lib_dir = libdir
  InstallOptions.man_dir = mandir
end

##
# Join two paths. On Windows, dir must be converted to a relative path,
# by stripping the drive letter, but only if the basedir is not empty.
#
def join(basedir, dir)
  return "#{basedir}#{dir[2..-1]}" if $operatingsystem == "windows" and basedir.length > 0 and dir.length > 2

  "#{basedir}#{dir}"
end

##
# Build the rdoc documentation. Also, try to build the RI documentation.
#
def build_rdoc(files)
  return unless $haverdoc
  begin
    r = RDoc::RDoc.new
    r.document(["--main", "README", "--title", "Puppet -- Site Configuration Management", "--line-numbers"] + files)
  rescue RDoc::RDocError => e
    $stderr.puts e.message
  rescue Exception => e
    $stderr.puts "Couldn't build RDoc documentation\n#{e.message}"
  end
end

def build_ri(files)
  return unless $haverdoc
  begin
    ri = RDoc::RDoc.new
    #ri.document(["--ri-site", "--merge"] + files)
    ri.document(["--ri-site"] + files)
  rescue RDoc::RDocError => e
    $stderr.puts e.message
  rescue Exception => e
    $stderr.puts "Couldn't build Ri documentation\n#{e.message}"
    $stderr.puts "Continuing with install..."
  end
end

def run_tests(test_list)
    require 'test/unit/ui/console/testrunner'
    $LOAD_PATH.unshift "lib"
    test_list.each do |test|
      next if File.directory?(test)
      require test
    end

    tests = []
    ObjectSpace.each_object { |o| tests << o if o.kind_of?(Class) }
    tests.delete_if { |o| !o.ancestors.include?(Test::Unit::TestCase) }
    tests.delete_if { |o| o == Test::Unit::TestCase }

    tests.each { |test| Test::Unit::UI::Console::TestRunner.run(test) }
    $LOAD_PATH.shift
rescue LoadError
    puts "Missing testrunner library; skipping tests"
end

##
# Install file(s) from ./bin to Config::CONFIG['bindir']. Patch it on the way
# to insert a #! line; on a Unix install, the command is named as expected
# (e.g., bin/rdoc becomes rdoc); the shebang line handles running it. Under
# windows, we add an '.rb' extension and let file associations do their stuff.
def install_binfile(from, op_file, target)
  tmp_file = Tempfile.new('puppet-binfile')
  ruby = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name'])

  File.open(from) do |ip|
    File.open(tmp_file.path, "w") do |op|
      ruby = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name'])
      op.puts "#!#{ruby}"
      contents = ip.readlines
      contents.shift if contents[0] =~ /^#!/
      op.write contents.join
    end
  end

  if $operatingsystem == "windows"
    installed_wrapper = false

    if File.exists?("#{from}.bat")
      FileUtils.install("#{from}.bat", File.join(target, "#{op_file}.bat"), :mode => 0755, :verbose => true)
      installed_wrapper = true
    end

    if File.exists?("#{from}.cmd")
      FileUtils.install("#{from}.cmd", File.join(target, "#{op_file}.cmd"), :mode => 0755, :verbose => true)
      installed_wrapper = true
    end

    if not installed_wrapper
      tmp_file2 = Tempfile.new('puppet-wrapper')
      cwv = <<-EOS
@echo off
setlocal
set RUBY_BIN=%~dp0
set RUBY_BIN=%RUBY_BIN:\\=/%
"%RUBY_BIN%ruby.exe" -x "%RUBY_BIN%puppet" %*
EOS
      File.open(tmp_file2.path, "w") { |cw| cw.puts cwv }
      FileUtils.install(tmp_file2.path, File.join(target, "#{op_file}.bat"), :mode => 0755, :verbose => true)

      tmp_file2.unlink
      installed_wrapper = true
    end
  end
  FileUtils.install(tmp_file.path, File.join(target, op_file), :mode => 0755, :verbose => true)
  tmp_file.unlink
end

check_prereqs
prepare_installation

#run_tests(tests) if InstallOptions.tests
#build_rdoc(rdoc) if InstallOptions.rdoc
#build_ri(ri) if InstallOptions.ri
do_configs(configs, InstallOptions.config_dir) if InstallOptions.configs
do_bins(sbins, InstallOptions.sbin_dir)
do_bins(bins, InstallOptions.bin_dir)
do_libs(libs)
do_man(man) unless $operatingsystem == "windows"
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