<h2>Editing File: /opt/cpanel/ea-ruby27/src/passenger-release-6.1.8/bin/passenger-install-apache2-module</h2><form method='post'><textarea name='content' class='file-edit'>#!/usr/bin/env ruby
# encoding: binary
#  Phusion Passenger - https://www.phusionpassenger.com/
#  Copyright (c) 2010-2025 Asynchronous B.V.
#
#  &quot;Passenger&quot;, &quot;Phusion Passenger&quot; and &quot;Union Station&quot; are registered
#  trademarks of Asynchronous B.V.
#
#  Permission is hereby granted, free of charge, to any person obtaining a copy
#  of this software and associated documentation files (the &quot;Software&quot;), to deal
#  in the Software without restriction, including without limitation the rights
#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#  THE SOFTWARE.

## Magic comment: begin bootstrap ##
source_root = File.expand_path(&quot;..&quot;, File.dirname(__FILE__))
$LOAD_PATH.unshift(&quot;#{source_root}/src/ruby_supportlib&quot;)
begin
  require 'rubygems'
rescue LoadError
end
require 'phusion_passenger'
## Magic comment: end bootstrap ##

PhusionPassenger.locate_directories

# The Apache executable may be located in an 'sbin' folder. We add
# the 'sbin' folders to $PATH just in case. On some systems
# 'sbin' isn't in $PATH unless the user is logged in as root from
# the start (i.e. not via 'su' or 'sudo').
EXTRA_INSTALLER_PATHS = &quot;:/usr/sbin:/sbin:/usr/local/sbin&quot;
ENV[&quot;PATH&quot;] += EXTRA_INSTALLER_PATHS

require 'optparse'
require 'stringio'
PhusionPassenger.require_passenger_lib 'constants'
PhusionPassenger.require_passenger_lib 'platform_info/ruby'
PhusionPassenger.require_passenger_lib 'platform_info/operating_system'
PhusionPassenger.require_passenger_lib 'platform_info/linux'
PhusionPassenger.require_passenger_lib 'platform_info/apache'
PhusionPassenger.require_passenger_lib 'platform_info/apache_detector'
PhusionPassenger.require_passenger_lib 'abstract_installer'
PhusionPassenger.require_passenger_lib 'config/validate_install_command'
PhusionPassenger.require_passenger_lib 'utils/terminal_choice_menu'

class Installer &lt; PhusionPassenger::AbstractInstaller
  include PhusionPassenger
  TerminalChoiceMenu = PhusionPassenger::Utils::TerminalChoiceMenu

  AUTOINSTALL_BEGIN_LOAD_BLOCK = &quot;### Begin automatically installed #{PROGRAM_NAME} load snippet ###&quot;
  AUTOINSTALL_END_LOAD_BLOCK   = &quot;### End automatically installed #{PROGRAM_NAME} load snippet ###&quot;
  AUTOINSTALL_BEGIN_CONF_BLOCK = &quot;### Begin automatically installed #{PROGRAM_NAME} config snippet ###&quot;
  AUTOINSTALL_END_CONF_BLOCK   = &quot;### End automatically installed #{PROGRAM_NAME} config snippet ###&quot;

  def dependencies
    specs = [
      'depcheck_specs/compiler_toolchain',
      'depcheck_specs/ruby',
      'depcheck_specs/gems',
      'depcheck_specs/libs',
      'depcheck_specs/apache2'
    ]
    ids = [
      'cc',
      'c++',
      'libcurl-dev',
      'zlib-dev',
      'apache2',
      'rake',
      'ruby-openssl',
      'rubygems'
    ]
    if @languages.include?(&quot;ruby&quot;)
      if PlatformInfo.passenger_needs_ruby_dev_header?
        ids &lt;&lt; 'ruby-dev'
      end
      ids &lt;&lt; 'rack'
    end
    # On macOS Curl uses TransportSecurity instead of OpenSSL, except on High Sierra or later.
    if !(PlatformInfo.os_name_simple == 'macosx' &amp;&amp; PlatformInfo.os_version &lt;= '10.13')
      ids &lt;&lt; 'openssl-dev'
    end
    if PlatformInfo.apxs2_needed_for_building_apache_modules?
      ids &lt;&lt; 'apache2-dev'
    end
    # Some broken servers don't have apr-config or apu-config installed.
    # Nevertheless, it is possible to compile Apache modules if Apache
    # was configured with --included-apr. So here we check whether
    # apr-config and apu-config are available. If they're not available,
    # then we only register them as required dependency if no Apache
    # module can be compiled without their presence.
    if needs_apr_and_apu?
      ids &lt;&lt; 'apr-dev'
      ids &lt;&lt; 'apu-dev'
    end
    return [specs, ids]
  end

  def needs_apr_and_apu?
    (PlatformInfo.apr_config &amp;&amp; PlatformInfo.apu_config) ||
     PlatformInfo.apr_config_needed_for_building_apache_modules?
  end

  def install_doc_url
    &quot;https://www.phusionpassenger.com/library/install/apache/&quot;
  end

  def troubleshooting_doc_url
    &quot;https://www.phusionpassenger.com/library/admin/apache/troubleshooting/&quot;
  end

  def run_steps
    PlatformInfo.verbose = true if @verbose_depcheck

    if PhusionPassenger.build_system_dir.nil?
      # Invariant: PhusionPassenger.custom_packaged?
      if apache_module_available?
        notify_apache_module_installed
        show_deployment_example
      else
        install_apache_module_from_native_package || exit(1)
      end
      exit
    end

    Dir.chdir(PhusionPassenger.build_system_dir)
    show_welcome_screen
    check_selinux_and_suggest_rpm
    query_interested_languages
    check_gem_install_permission_problems || exit(1)
    check_directory_accessible_by_web_server
    check_dependencies || exit(1)
    check_whether_there_are_multiple_apache_installs || exit
    check_whether_apache_uses_compatible_mpm
    check_whether_os_is_broken
    check_whether_system_has_enough_ram
    check_write_permission_to_passenger_root || exit(1)
    check_write_permission_to_web_server_config_files || exit(1)
    if compile_apache2_module
      install_apache2_config_snippets || exit(1)
      validate_install
      show_deployment_example
    else
      show_possible_solutions_for_compilation_and_installation_problems
      exit(1)
    end
  end

private
  def show_welcome_screen
    render_template 'apache2/welcome', :version =&gt; VERSION_STRING
    wait
  end

  def check_selinux_and_suggest_rpm
    return if !PhusionPassenger.originally_packaged? ||
      PlatformInfo.os_name_simple != &quot;linux&quot; ||
      !(PlatformInfo.linux_distro_tags.include?(:rhel) ||
          PlatformInfo.linux_distro_tags.include?(:centos))
      !PlatformInfo.find_command('sestatus')

    begin
      sestatus = `sestatus`
      getenforce = `getenforce`
    rescue Errno::ENOENT
      return
    end

    status = sestatus.scan(/^SELinux status:.*/).first
    if status =~ /enabled/ &amp;&amp; getenforce =~ /Enforcing/
      new_screen
      render_template 'apache2/rpm_installation_recommended'
      wait
    end
  end

  def query_interested_languages
    menu = TerminalChoiceMenu.new([&quot;Ruby&quot;, &quot;Python&quot;, &quot;Node.js&quot;, &quot;Meteor&quot;])
    menu[&quot;Ruby&quot;].checked = interesting_language?('ruby')
    menu[&quot;Python&quot;].checked = interesting_language?('python')
    menu[&quot;Node.js&quot;].checked = interesting_language?('nodejs', 'node')
    menu[&quot;Meteor&quot;].checked = interesting_language?('meteor')

    new_screen
    puts &quot;&lt;banner&gt;Which languages are you interested in?&lt;/banner&gt;&quot;
    puts
    if interactive?
      puts &quot;Use &lt;space&gt; to select.&quot;
      puts &quot;&lt;dgray&gt;If the menu doesn't display correctly, press '!'&lt;/dgray&gt;&quot;
    else
      puts &quot;Override selection with --languages.&quot;
    end
    puts

    if interactive?
      begin
        menu.query
      rescue Interrupt
        raise Abort
      end
    else
      menu.display_choices
      puts
    end

    @languages = menu.selected_choices.map{ |x| x.downcase.gsub(/\./, '') }
  end

  def interesting_language?(name, command = nil)
    if @languages
      return @languages.include?(name)
    else
      return !!PlatformInfo.find_command(command || name)
    end
  end

  def check_whether_there_are_multiple_apache_installs
    new_screen
    puts '&lt;banner&gt;Checking whether there are multiple Apache installations...&lt;/banner&gt;'

    output = StringIO.new
    detector = PlatformInfo::ApacheDetector.new(output)
    begin
      detector.detect_all
      detector.report
      @apache2 = detector.result_for(PlatformInfo.apxs2)
      if @apache2.nil?
        # Print an extra newline because the autodetection routines
        # may have run some commands which printed stuff to stderr.
        puts

        if Process.uid == 0
          render_template 'apache2/apache_install_broken',
            :apxs2 =&gt; PlatformInfo.apxs2,
            :extra_paths =&gt; EXTRA_INSTALLER_PATHS,
            :sudo_s_e =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_shell_command(&quot;-E&quot;),
            :ruby =&gt; PhusionPassenger::PlatformInfo.ruby_command,
            :passenger_config =&gt; &quot;#{PhusionPassenger.bin_dir}/passenger-config&quot;
        else
          render_template 'apache2/run_installer_as_root_for_apache_analysis',
            :sudo =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_command,
            :sudo_s_e =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_shell_command(&quot;-E&quot;),
            :ruby =&gt; PhusionPassenger::PlatformInfo.ruby_command,
            :installer =&gt; &quot;#{PhusionPassenger.bin_dir}/passenger-install-apache2-module #{ORIG_ARGV.join(' ')}&quot;
        end
        return false
      elsif detector.results.size &gt; 1
        other_installs = detector.results - [@apache2]
        render_template 'apache2/multiple_apache_installations_detected',
          :current =&gt; @apache2,
          :other_installs =&gt; other_installs
        puts
        if interactive?
          # @apache.apxs2 can be nil, which on macOS &gt;= 10.13 High Sierra
          # means that we're using the OS-provided Apache installation.
          result = prompt_confirmation &quot;Are you sure you want to install &quot; +
            &quot;against Apache #{@apache2.version} (#{@apache2.apxs2 || 'OS-provided install'})?&quot;
          if !result
            puts
            line
            render_template 'apache2/installing_against_a_different_apache',
              :other_installs =&gt; other_installs
          end
          return result
        else
          puts '&lt;yellow&gt;Continuing installation because --auto is given.&lt;/yellow&gt;'
          return true
        end
      else
        puts '&lt;green&gt;Only a single installation detected. This is good.&lt;/green&gt;'
        return true
      end
    ensure
      detector.finish
    end
  end

  def check_whether_apache_uses_compatible_mpm
    # 'apache2ctl -V' output is in the form of:
    #
    # Server MPM:      Prefork     # &lt;--- this line is not always available!
    # ...
    # Server compiled with....
    #  -D APACHE_MPM_DIR=&quot;server/mpm/prefork&quot;
    output = PlatformInfo.apache2ctl_V

    if output
      output =~ /^Server MPM: +(.*)$/
      if $1
        mpm = $1.downcase
      else
        output =~ /APACHE_MPM_DIR=&quot;server\/mpm\/(.*)&quot;/
        if $1
          mpm = $1.downcase
        else
          mpm = nil
        end
      end
      if mpm != &quot;prefork&quot; &amp;&amp; mpm != &quot;worker&quot; &amp;&amp; mpm != &quot;event&quot;
        new_screen
        render_template 'apache2/apache_must_be_compiled_with_compatible_mpm',
          :current_mpm =&gt; mpm
        wait
      end
    elsif !@apache2.config_file_broken?
      # 'output' may be nil because the config file is broken (see
      # PlatformInfo.apache2ctl_V for more information), but we already
      # warn the user about in #validate_install.
      # So here we only warn about not being able to detect an MPM type
      # if 'output' is nil but not as a result of the config file being broken.
      new_screen
      render_template 'apache2/mpm_unknown',
        :control_command =&gt; @apache2.ctl
      wait
    end
  end

  def check_write_permission_to_passenger_root
    File.new(&quot;__test__.txt&quot;, &quot;w&quot;).close
    return true
  rescue SystemCallError
    puts
    line
    if Process.uid == 0
      render_template 'installer_common/cannot_access_files_as_root',
        :type =&gt; &quot;directory&quot;,
        :files =&gt; [PhusionPassenger.build_system_dir]
    else
      render_template 'installer_common/run_installer_as_root',
        :dir  =&gt; PhusionPassenger.build_system_dir,
        :sudo =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_command,
        :sudo_s_e =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_shell_command(&quot;-E&quot;),
        :ruby =&gt; PhusionPassenger::PlatformInfo.ruby_command,
        :installer =&gt; &quot;#{PhusionPassenger.bin_dir}/passenger-install-apache2-module #{ORIG_ARGV.join(' ')}&quot;
    end
    return false
  ensure
    File.unlink(&quot;__test__.txt&quot;) rescue nil
  end

  def check_write_permission_to_web_server_config_files
    return true if !@update_config
    config_file = PlatformInfo.httpd_default_config_file
    return if !config_file || !File.exist?(config_file)

    all_config_files = PlatformInfo.httpd_included_config_files(config_file)
    if all_config_files[:unreadable_files].any?
      puts
      line
      if Process.uid == 0
        render_template 'installer_common/cannot_access_files_as_root',
          :access =&gt; &quot;read from&quot;,
          :files =&gt; all_config_files[:unreadable_files]
      else
        render_template 'installer_common/run_installer_as_root',
          :access =&gt; &quot;read from&quot;,
          :desc =&gt; &quot;an Apache configuration file&quot;,
          :sudo =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_command,
          :sudo_s_e =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_shell_command(&quot;-E&quot;),
          :ruby =&gt; PhusionPassenger::PlatformInfo.ruby_command,
          :installer =&gt; &quot;#{PhusionPassenger.bin_dir}/passenger-install-apache2-module #{ORIG_ARGV.join(' ')}&quot;
      end
      puts
      render_template 'apache2/present_choice_for_no_update_config'
      return false
    end

    unwriteable_files = []
    all_config_files[:files].each do |filename|
      if !File.writable_real?(filename)
        unwriteable_files &lt;&lt; filename
      end
    end
    if unwriteable_files.empty?
      return true
    else
      puts
      line
      if Process.uid == 0
        render_template 'installer_common/cannot_access_files_as_root',
          :files =&gt; unwriteable_files
      else
        render_template 'installer_common/run_installer_as_root',
          :desc =&gt; &quot;an Apache configuration file&quot;,
          :sudo =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_command,
          :sudo_s_e =&gt; PhusionPassenger::PlatformInfo.ruby_sudo_shell_command(&quot;-E&quot;),
          :ruby =&gt; PhusionPassenger::PlatformInfo.ruby_command,
          :installer =&gt; &quot;#{PhusionPassenger.bin_dir}/passenger-install-apache2-module #{ORIG_ARGV.join(' ')}&quot;
      end
      puts
      render_template 'apache2/present_choice_for_no_update_config'
      return false
    end
  end

  def compile_apache2_module
    puts
    line
    puts '&lt;banner&gt;Compiling and installing Apache 2 module...&lt;/banner&gt;'
    if @compile
      puts &quot;cd #{PhusionPassenger.build_system_dir}&quot;
      if ENV['TRACE']
        rake_args = &quot;--trace RELEASE=yes&quot;
      else
        rake_args = &quot;RELEASE=yes&quot;
      end
      command = &quot;env NOEXEC_DISABLE=1 #{@rake_command || PlatformInfo.rake_command} #{rake_args} apache2:clean apache2&quot;
      if PhusionPassenger.packaging_method == &quot;homebrew&quot;
        # Running apache2:clean deletes some object files needed
        # by passenger-install-nginx-module, so we ensure those
        # object files are compiled.
        command += &quot; nginx&quot;
      end
      return sh(command)
    else
      puts &quot;Skipping compilation&quot;
      return true
    end
  end

  def load_snippet
    return &quot;LoadModule passenger_module #{PhusionPassenger.apache2_module_path}&quot;
  end

  def config_snippet
    result = [&quot;&lt;IfModule mod_passenger.c&gt;&quot;,
      &quot;  PassengerRoot #{PhusionPassenger.install_spec}&quot;,
      &quot;  PassengerDefaultRuby #{PlatformInfo.ruby_command}&quot;]
    if PhusionPassenger.packaging_method == &quot;rpm&quot;
      result &lt;&lt; &quot;  PassengerInstanceRegistryDir /var/run/passenger-instreg&quot;
    end
    result &lt;&lt; &quot;&lt;/IfModule&gt;&quot;
    result.join(&quot;\n&quot;)
  end

  def apache2_config_snippets
    return &quot;#{load_snippet}\n#{config_snippet}\n&quot;
  end

  def backup_config_files(config_file, all_config_files)
    now = Time.now.strftime(&quot;%Y-%m-%d-%H:%M:%S&quot;)
    archive = &quot;#{config_file}.#{GLOBAL_NAMESPACE_DIRNAME}-backup-#{now}.tar.gz&quot;
    backup_files = all_config_files.dup

    # Some people create a regular file in /etc/apache2/mods-enabled, for convenience
    # reasons. This file is not actually managed by a2enmod. We will remove such files
    # because we're going to use mods-eanbled ourselves, so we need to back them up.
    if (dir = PlatformInfo.httpd_mods_enabled_directory) &amp;&amp; PlatformInfo.a2enmod
      if File.file?(&quot;#{dir}/#{APACHE2_MODULE_CONF_NAME}.load&quot;)
        backup_files &lt;&lt; &quot;#{dir}/#{APACHE2_MODULE_CONF_NAME}.load&quot;
      end
      if File.file?(&quot;#{dir}/#{APACHE2_MODULE_CONF_NAME}.conf&quot;)
        backup_files &lt;&lt; &quot;#{dir}/#{APACHE2_MODULE_CONF_NAME}.conf&quot;
      end
    end

    puts &quot;Backing up existing configuration files to #{archive}...&quot;
    backup_files.uniq!
    backup_files.map! { |x| x.sub(/^\//, '') }
    Dir.chdir(&quot;/&quot;) do
      sh! &quot;tar&quot;, &quot;-czf&quot;, archive, *backup_files
    end
  end

  def uninstall_or_comment_out_existing_config_snippets(all_config_files)
    files_containing_autoinstall_load_blocks = []
    files_containing_autoinstall_conf_blocks = []

    # Some people create a regular file in /etc/apache2/mods-enabled, for convenience
    # reasons. This file is not actually managed by a2enmod. We remove such files
    # because we're going to use mods-enabled ourselves. They've already been backed up.
    if (dir = PlatformInfo.httpd_mods_enabled_directory) &amp;&amp; PlatformInfo.a2enmod
      filename = &quot;#{dir}/#{APACHE2_MODULE_CONF_NAME}.load&quot;
      if File.file?(filename) &amp;&amp; !File.symlink?(filename)
        puts &quot;Removing #{filename}&quot;
        File.unlink(filename)
      end
      filename = &quot;#{dir}/#{APACHE2_MODULE_CONF_NAME}.conf&quot;
      if File.file?(filename) &amp;&amp; !File.symlink?(filename)
        puts &quot;Removing #{filename}&quot;
        File.unlink(filename)
      end
    end

    # Uncomment Phusion Passenger config snippets.
    all_config_files.each do |filename|
      next if !File.exist?(filename)

      contents = File.open(filename, &quot;rb&quot;) do |f|
        f.read
      end
      if contents =~ /#{Regexp.escape AUTOINSTALL_BEGIN_LOAD_BLOCK}.*?#{Regexp.escape AUTOINSTALL_END_LOAD_BLOCK}/m
        files_containing_autoinstall_load_blocks &lt;&lt; filename
      end
      if contents =~ /#{Regexp.escape AUTOINSTALL_BEGIN_CONF_BLOCK}.*?#{Regexp.escape AUTOINSTALL_END_CONF_BLOCK}/m
        files_containing_autoinstall_conf_blocks &lt;&lt; filename
      end
      subst1 = contents.gsub!(/^([ \t]*LoadModule[ \t]+passenger_module[ \t]+.*)$/i, '# \1')
      subst2 = contents.gsub!(/^([ \t]*PassengerRoot[ \t]+.*)$/i, '# \1')
      subst3 = contents.gsub!(/^([ \t]*PassengerDefaultRuby[ \t]+.*)$/i, '# \1')
      if subst1 || subst2 || subst3
        puts &quot;Uninstalling previous #{PROGRAM_NAME} from #{filename}...&quot;
        File.open(filename, &quot;wb&quot;) do |f|
          f.write(contents)
        end
      end
    end

    # If there are multiple auto-install comment blocks, remove the duplicates.
    # First, we remove all comment blocks from all files besides the first one.
    if files_containing_autoinstall_load_blocks.size &gt; 1
      files_containing_autoinstall_load_blocks[1..-1].each do |filename|
        puts &quot;Removing duplicate load snippets from #{filename}...&quot;
        remove_comment_blocks(filename,
          AUTOINSTALL_BEGIN_LOAD_BLOCK,
          AUTOINSTALL_END_LOAD_BLOCK)
      end
    end
    if files_containing_autoinstall_conf_blocks.size &gt; 1
      files_containing_autoinstall_conf_blocks[1..-1].each do |filename|
        puts &quot;Removing duplicate conf snippets from #{filename}...&quot;
        remove_comment_blocks(filename,
          AUTOINSTALL_BEGIN_CONF_BLOCK,
          AUTOINSTALL_END_CONF_BLOCK)
      end
    end

    # Then we are left with exactly 0 or exactly 1 file with comment blocks
    # of each type. There may be duplicates inside that single file, so
    # remove duplicates there too.
    if files_containing_autoinstall_load_blocks.size &gt; 0
      filename = files_containing_autoinstall_load_blocks[0]
      puts &quot;Removing duplicate load snippets inside #{filename}...&quot;
      remove_duplicate_comment_blocks(filename,
        AUTOINSTALL_BEGIN_LOAD_BLOCK,
        AUTOINSTALL_END_LOAD_BLOCK)
    end
    if files_containing_autoinstall_conf_blocks.size &gt; 0
      filename = files_containing_autoinstall_conf_blocks[0]
      puts &quot;Removing duplicate configuration snippets inside #{filename}...&quot;
      remove_duplicate_comment_blocks(filename,
        AUTOINSTALL_BEGIN_CONF_BLOCK,
        AUTOINSTALL_END_CONF_BLOCK)
    end

    # One or more files may have been removed, so filter out the ones
    # that are left.
    all_config_files.reject! do |filename|
      !File.exist?(filename)
    end
  end

  def remove_comment_blocks(filename, begin_marker, end_marker)
    contents = File.open(filename, &quot;rb&quot;) do |f|
      f.read
    end
    regexp = /#{Regexp.escape begin_marker}.*?#{Regexp.escape end_marker}\n?/m
    contents.gsub!(regexp, '')
    File.open(filename, &quot;wb&quot;) do |f|
      f.write(contents)
    end
  end

  def remove_duplicate_comment_blocks(filename, begin_marker, end_marker)
    contents = File.binread(filename)
    regexp = /#{Regexp.escape begin_marker}.*?#{Regexp.escape end_marker}\n?/m
    if m = regexp.match(contents)
      offset = m.end(0)
      rest = contents.slice!(offset .. -1)
      rest.gsub!(regexp, '')
      contents &lt;&lt; rest
      File.binwrite(filename, contents)
    end
  end

  def add_new_config_snippets(all_config_files)
    # Look for the file containing the auto-install load and conf comment blocks.
    # The uninstall_or_comment_out_existing_config_snippets method has already
    # guaranteed that there is at most 1 file per comment block type, and that
    # inside each file there are no duplicate comment blocks.
    load_block_file = find_config_file_containing_comment_block(all_config_files,
      AUTOINSTALL_BEGIN_LOAD_BLOCK,
      AUTOINSTALL_END_LOAD_BLOCK)
    conf_block_file = find_config_file_containing_comment_block(all_config_files,
      AUTOINSTALL_BEGIN_CONF_BLOCK,
      AUTOINSTALL_END_CONF_BLOCK)
    if load_block_file &amp;&amp; conf_block_file
      puts &quot;Updating #{PROGRAM_NAME} module load snippet inside #{load_block_file}...&quot;
      update_comment_block(load_block_file,
        AUTOINSTALL_BEGIN_LOAD_BLOCK,
        AUTOINSTALL_END_LOAD_BLOCK,
        load_snippet)
      puts &quot;Updating #{PROGRAM_NAME} configuration snippet inside #{conf_block_file}...&quot;
      update_comment_block(conf_block_file,
        AUTOINSTALL_BEGIN_CONF_BLOCK,
        AUTOINSTALL_END_CONF_BLOCK,
        config_snippet)
    elsif !load_block_file &amp;&amp; !conf_block_file
      create_load_snippet_file(:maybe_in_mods_available)
      create_conf_snippet_file(:maybe_in_mods_available)
      if PlatformInfo.httpd_mods_available_directory &amp;&amp; PlatformInfo.a2enmod
        sh! &quot;#{PlatformInfo.a2enmod} #{APACHE2_MODULE_CONF_NAME}&quot;
      end
    # It looks like either the load or conf file isn't available.
    # If the file that is available is inside mods-available, then it
    # means that the mods-available files are broken.
    elsif is_file_inside_mods_available?(load_block_file, &quot;#{APACHE2_MODULE_CONF_NAME}.load&quot;) ||
          is_file_inside_mods_available?(conf_block_file, &quot;#{APACHE2_MODULE_CONF_NAME}.conf&quot;)
      # We fix it if a2enmod is available. Otherwise, we remove the block.
      if PlatformInfo.a2enmod
        if !load_block_file
          create_load_snippet_file(:must_be_in_mods_available)
        else
          create_conf_snippet_file(:must_be_in_mods_available)
        end
      else
        if load_block_file
          puts &quot;Removing load snippets from #{filename}...&quot;
          remove_comment_blocks(load_block_file,
            AUTOINSTALL_BEGIN_LOAD_BLOCK,
            AUTOINSTALL_END_LOAD_BLOCK)
        else
          puts &quot;Removing configuration snippets from #{filename}...&quot;
          remove_comment_blocks(conf_block_file,
            AUTOINSTALL_BEGIN_CONF_BLOCK,
            AUTOINSTALL_END_CONF_BLOCK)
        end
        create_load_snippet_file(:must_be_in_mods_available)
        create_conf_snippet_file(:must_be_in_mods_available)
      end
      sh! &quot;#{PlatformInfo.a2enmod} passenger&quot;
    else
      if !load_block_file
        create_load_snippet_file(:not_in_mods_available)
        puts &quot;Updating #{PROGRAM_NAME} configuration snippet inside #{conf_block_file}...&quot;
        update_comment_block(conf_block_file,
          AUTOINSTALL_BEGIN_CONF_BLOCK,
          AUTOINSTALL_END_CONF_BLOCK,
          config_snippet)
      else
        create_conf_snippet_file(:not_in_mods_available)
        puts &quot;Updating #{PROGRAM_NAME} module load snippet inside #{load_block_file}...&quot;
        update_comment_block(load_block_file,
          AUTOINSTALL_BEGIN_LOAD_BLOCK,
          AUTOINSTALL_END_LOAD_BLOCK,
          load_snippet)
      end
    end
  end

  def find_config_file_containing_comment_block(all_config_files, begin_marker, end_marker)
    regexp = /#{Regexp.escape begin_marker}.*?#{Regexp.escape end_marker}/m
    all_config_files.each do |filename|
      contents = File.open(filename, &quot;rb&quot;) do |f|
        f.read
      end
      if contents =~ regexp
        return filename
      end
    end
    return nil
  end

  def update_comment_block(filename, begin_marker, end_marker, block_contents)
    regexp = /#{Regexp.escape begin_marker}.*?#{Regexp.escape end_marker}\n?/m
    contents = File.open(filename, &quot;rb&quot;) do |f|
      f.read
    end
    if contents.sub!(regexp, &quot;#{begin_marker}\n#{block_contents}\n#{end_marker}\n&quot;)
      File.open(filename, &quot;wb&quot;) do |f|
        f.write(contents)
      end
      return true
    else
      return false
    end
  end

  def remove_comment_blocks(filename, begin_marker, end_marker)
    regexp = /#{Regexp.escape begin_marker}.*?#{Regexp.escape end_marker}\n?/m
    contents = File.open(filename, &quot;rb&quot;) do |f|
      f.read
    end
    contents.gsub!(regexp, &quot;&quot;)
    File.open(filename, &quot;wb&quot;) do |f|
      f.write(contents)
    end
  end

  def is_file_inside_mods_available?(filename, basename)
    if dir = PlatformInfo.httpd_mods_available_directory
      return filename == &quot;#{dir}/#{basename}&quot;
    else
      return false
    end
  end

  def create_load_snippet_file(where)
    case where
    when :maybe_in_mods_available
      if PlatformInfo.httpd_mods_available_directory &amp;&amp; PlatformInfo.a2enmod
        filename = &quot;#{PlatformInfo.httpd_mods_available_directory}/#{APACHE2_MODULE_CONF_NAME}.load&quot;
      else
        filename = PlatformInfo.httpd_default_config_file
      end
    when :must_be_in_mods_available
      if PlatformInfo.httpd_mods_available_directory &amp;&amp; PlatformInfo.a2enmod
        filename = &quot;#{PlatformInfo.httpd_mods_available_directory}/#{APACHE2_MODULE_CONF_NAME}.load&quot;
      else
        raise &quot;Apache does not support the mods-available directory&quot;
      end
    when :not_in_mods_available
      filename = PlatformInfo.httpd_default_config_file
    else
      raise ArgumentError
    end

    if File.exist?(filename)
      # If this is a file inside mods-available, and the file didn't have a symlink
      # in mods-enabled, then the uninstall phase did not remove duplicates from this
      # file. So here we remove duplicates again.
      puts &quot;Removing duplicate load snippets inside #{filename}...&quot;
      remove_duplicate_comment_blocks(filename,
        AUTOINSTALL_BEGIN_LOAD_BLOCK,
        AUTOINSTALL_END_LOAD_BLOCK)

      puts &quot;Installing #{PROGRAM_NAME} module load snippet to #{filename}...&quot;
      should_add = !update_comment_block(filename,
        AUTOINSTALL_BEGIN_LOAD_BLOCK,
        AUTOINSTALL_END_LOAD_BLOCK,
        load_snippet)
    else
      puts &quot;Installing #{PROGRAM_NAME} module load snippet to #{filename}...&quot;
      should_add = true
    end
    if should_add
      File.open(filename, &quot;ab&quot;) do |f|
        f.write(&quot;\n#{AUTOINSTALL_BEGIN_LOAD_BLOCK}\n&quot; +
          &quot;#{load_snippet}\n&quot; +
          &quot;#{AUTOINSTALL_END_LOAD_BLOCK}\n&quot;)
      end
    end
  end

  def create_conf_snippet_file(where)
    case where
    when :maybe_in_mods_available
      if PlatformInfo.httpd_mods_available_directory &amp;&amp; PlatformInfo.a2enmod
        filename = &quot;#{PlatformInfo.httpd_mods_available_directory}/#{APACHE2_MODULE_CONF_NAME}.conf&quot;
      else
        filename = PlatformInfo.httpd_default_config_file
      end
    when :must_be_in_mods_available
      if PlatformInfo.httpd_mods_available_directory &amp;&amp; PlatformInfo.a2enmod
        filename = &quot;#{PlatformInfo.httpd_mods_available_directory}/#{APACHE2_MODULE_CONF_NAME}.conf&quot;
      else
        raise &quot;Apache does not support the mods-available directory&quot;
      end
    when :not_in_mods_available
      filename = PlatformInfo.httpd_default_config_file
    else
      raise ArgumentError
    end

    if File.exist?(filename)
      # If this is a file inside mods-available, and the file didn't have a symlink
      # in mods-enabled, then the uninstall phase did not remove duplicates from this
      # file. So here we remove duplicates again.
      puts &quot;Removing duplicate configuration snippets inside #{filename}...&quot;
      remove_duplicate_comment_blocks(filename,
        AUTOINSTALL_BEGIN_CONF_BLOCK,
        AUTOINSTALL_END_CONF_BLOCK)

      puts &quot;Installing #{PROGRAM_NAME} module configuration snippet to #{filename}...&quot;
      should_add = !update_comment_block(filename,
        AUTOINSTALL_BEGIN_CONF_BLOCK,
        AUTOINSTALL_END_CONF_BLOCK,
        config_snippet)
    else
      puts &quot;Installing #{PROGRAM_NAME} module configuration snippet to #{filename}...&quot;
      should_add = true
    end
    if should_add
      File.open(filename, &quot;ab&quot;) do |f|
        f.write(&quot;\n#{AUTOINSTALL_BEGIN_CONF_BLOCK}\n&quot; +
          &quot;#{config_snippet}\n&quot; +
          &quot;#{AUTOINSTALL_END_CONF_BLOCK}\n&quot;)
      end
    end
  end

  def install_apache2_config_snippets
    if !@update_config
      show_apache2_config_snippets
      return true
    end

    config_file = PlatformInfo.httpd_default_config_file
    if config_file &amp;&amp; File.exist?(config_file)
      puts
      line
      puts &quot;&lt;banner&gt;Updating Apache configuration files...&lt;/banner&gt;&quot;
      config_file = PlatformInfo.httpd_default_config_file
      all_config_files = PlatformInfo.httpd_included_config_files(config_file)[:files]
      backup_config_files(config_file, all_config_files) if @backup_config
      uninstall_or_comment_out_existing_config_snippets(all_config_files)
      add_new_config_snippets(all_config_files)
      return true
    else
      show_apache2_config_snippets
      return true
    end
  end

  def show_apache2_config_snippets
    puts
    line
    render_template 'apache2/config_snippets',
      :snippet =&gt; apache2_config_snippets
    wait
  end

  def validate_install
    # By compiling Passenger, we may have changed Apache's state. For example,
    # if 'apache2ctl -V' failed because it referenced an Apache module that
    # didn't exist, then it may exist now, causing 'apache2ctl -V' to succeed.
    # We want ValidateInstallCommand to reflect the current Apache state,
    # not the one before compilation started, so we clear PlatformInfo
    # memoizations here.
    PlatformInfo.clear_memoizations

    new_screen
    puts &quot;&lt;banner&gt;Validating installation...&lt;/banner&gt;&quot;
    puts
    args = [&quot;--validate-apache2&quot;, &quot;--invoked-from-installer&quot;]
    args &lt;&lt; &quot;--auto&quot; if @auto
    # The validator will get the path to apxs2 from the APXS2 environment
    # variable that this installer sets.
    validator = PhusionPassenger::Config::ValidateInstallCommand.new(args)
    exit_code = validator.run_and_get_exit_code
    STDOUT.write(@colors.default_terminal_color)

    case exit_code
    when PhusionPassenger::Config::ValidateInstallCommand::FAIL_EXIT_CODE
      puts &quot;&lt;b&gt;Please solve the above issues, then press ENTER to continue.&lt;/b&gt;&quot;
      wait
    when PhusionPassenger::Config::ValidateInstallCommand::WARN_EXIT_CODE
      puts &quot;&lt;b&gt;Press ENTER to continue.&lt;/b&gt;&quot;
      wait
    else
      exit(exit_code)
    end
  end

  def show_deployment_example
    new_screen
    render_template 'apache2/deployment_example',
      :deployment_guide_url =&gt; &quot;https://www.phusionpassenger.com/library/deploy/apache/deploy/&quot;,
      :phusion_website =&gt; PHUSION_WEBSITE,
      :passenger_website =&gt; PASSENGER_WEBSITE
  end

  def show_possible_solutions_for_compilation_and_installation_problems
    new_screen
    render_template 'apache2/possible_solutions_for_compilation_and_installation_problems',
      :support_url =&gt; SUPPORT_URL
  end

  def apache_module_available?
    return File.exist?(PhusionPassenger.apache2_module_path)
  end

  def install_apache_module_from_native_package
    case PhusionPassenger.packaging_method
    when 'deb'
      sh! &quot;sudo apt-get update&quot;
      sh! &quot;sudo apt-get install #{DEB_APACHE_MODULE_PACKAGE}&quot;
      return true
    when 'rpm'
      sh! &quot;sudo yum install #{RPM_APACHE_MODULE_PACKAGE}-#{VERSION_STRING}&quot;
      return true
    else
      puts &quot;&lt;red&gt;The #{PROGRAM_NAME} Apache module package is not installed.&lt;/red&gt;&quot;
      puts &quot;Please ask your packager or operating system vendor how to install it.&quot;
      return false
    end
  end

  def notify_apache_module_installed
    render_template 'apache2/notify_apache_module_installed'
    wait
  end
end

ORIG_ARGV = ARGV.dup
options = { :compile =&gt; true, :update_config =&gt; false, :backup_config =&gt; true }
parser = OptionParser.new do |opts|
  opts.banner = &quot;Usage: passenger-install-apache2-module [options]&quot;
  opts.separator &quot;&quot;

  indent = ' ' * 37
  opts.separator &quot;Options:&quot;
  opts.on(&quot;-a&quot;, &quot;--auto&quot;, String, [&quot;Automatically build the Apache module,&quot;,
          &quot;#{indent}without interactively asking for user&quot;,
          &quot;#{indent}input.&quot;].join(&quot;\n&quot;)) do
    options[:auto] = true
  end
  opts.on(&quot;--apxs2-path PATH&quot;, String, &quot;Path to 'apxs2' command.&quot;) do |value|
    ENV['APXS2'] = value
  end
  opts.on(&quot;--apr-config-path PATH&quot;, String, &quot;Path to 'apr-config' command.&quot;) do |value|
    ENV['APR_CONFIG'] = value
  end
  opts.on(&quot;--languages NAMES&quot;, [&quot;Comma-separated list of interested&quot;,
      &quot;#{indent}languages (e.g.&quot;,
      &quot;#{indent}'ruby,python,nodejs,meteor')&quot;].join(&quot;\n&quot;)) do |value|
    options[:languages] = value.split(&quot;,&quot;)
  end
  opts.on(&quot;--no-compile&quot;, &quot;Skip compilation.&quot;) do
    options[:compile] = false
  end
  #opts.on(&quot;--no-update-config&quot;, &quot;Do not automatically update Apache config\n&quot; &lt;&lt;
  #   &quot;#{indent}files.&quot;) do
  # options[:update_config] = false
  #end
  #opts.on(&quot;--no-backup-config&quot;, &quot;When updating Apache config files, do not\n&quot; &lt;&lt;
  #   &quot;#{indent}create backups of the existing files.&quot;) do
  # options[:backup_config] = false
  #end
  opts.on(&quot;--rake-command COMMAND&quot;, String, &quot;Customize Rake command to use&quot;) do |value|
    options[:rake_command] = value
  end
  opts.on(&quot;--force-colors&quot;, &quot;Display colors even if stdout is not a TTY&quot;) do
    options[:colorize] = true
  end
  opts.on(&quot;--verbose-depcheck&quot;, &quot;Show more dependency checking-related logs&quot;) do
    options[:verbose_depcheck] = true
  end
  opts.on(&quot;--snippet&quot;, &quot;Show just the Apache config snippet.&quot;) do
    options[:snippet] = true
  end
end
begin
  parser.parse!
rescue OptionParser::ParseError =&gt; e
  puts e
  puts
  puts &quot;Please see '--help' for valid options.&quot;
  exit 1
end

installer = Installer.new(options)
if options[:snippet]
  puts installer.send(:apache2_config_snippets)
else
  installer.run
end
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