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Edit: /opt/passenger/bin/passenger-install-nginx-module

#!/usr/bin/ruby
#  Phusion Passenger - https://www.phusionpassenger.com/
#  Copyright (c) 2010-2025 Asynchronous B.V.
#
#  "Passenger", "Phusion Passenger" and "Union Station" 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 "Software"), 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 "AS IS", 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("..", File.dirname(__FILE__))
$LOAD_PATH.unshift("#{source_root}/src/ruby_supportlib")
begin
  require 'rubygems'
rescue LoadError
end
require 'phusion_passenger'
## Magic comment: end bootstrap ##

PhusionPassenger.locate_directories

require 'digest/sha2'
require 'optparse'
require 'fileutils'
require 'tmpdir'
PhusionPassenger.require_passenger_lib 'platform_info/compiler'
PhusionPassenger.require_passenger_lib 'platform_info/ruby'
PhusionPassenger.require_passenger_lib 'platform_info/openssl'
PhusionPassenger.require_passenger_lib 'abstract_installer'
PhusionPassenger.require_passenger_lib 'utils/terminal_choice_menu'
PhusionPassenger.require_passenger_lib 'utils/shellwords'

DOWNLOAD_OPTION = {
  :connect_timeout => 30,
  :idle_timeout    => 30
}

class Installer < PhusionPassenger::AbstractInstaller
 include PhusionPassenger
 TerminalChoiceMenu = PhusionPassenger::Utils::TerminalChoiceMenu

def dependencies
 specs = [
 'depcheck_specs/compiler_toolchain',
 'depcheck_specs/ruby',
 'depcheck_specs/gems',
 'depcheck_specs/libs',
 'depcheck_specs/utilities'
 ]
 ids = [
 'cc',
 'c++',
 'download-tool',
 'libcurl-dev',
 'openssl-dev',
 'zlib-dev',
 'rake',
 'ruby-openssl',
 'rubygems'
 ]
 if @languages.include?("ruby")
 if PlatformInfo.passenger_needs_ruby_dev_header?
 ids << 'ruby-dev'
 end
 ids << 'rack'
 end
 return [specs, ids]
 end

def install_doc_url
    "https://www.phusionpassenger.com/library/install/nginx/"
  end

def troubleshooting_doc_url
    "https://www.phusionpassenger.com/library/admin/nginx/troubleshooting/"
  end

def run_steps
    # Make sure the configure script finds the correct
    # passenger-config command.
    ENV['PATH'] = PhusionPassenger.bin_dir + ":" + ENV['PATH']

show_welcome_screen
    query_interested_languages
    check_gem_install_permission_problems || exit(1)
    check_directory_accessible_by_web_server
    check_nginx_module_sources_available || exit(1)
    check_dependencies || exit(1)
    if needs_compiling_support_files?
      check_whether_we_can_write_to(PhusionPassenger.build_system_dir) || exit(1)
    end
    check_whether_os_is_broken
    check_whether_system_has_enough_ram

download_and_install = should_we_download_and_install_nginx_automatically?
    if pcre_is_installed?
      @pcre_source_dir = nil
    else
      @pcre_source_dir = download_and_extract_pcre
    end
    if download_and_install
      nginx_source_dir = download_and_extract_nginx
      if nginx_source_dir.nil?
        show_possible_solutions_for_download_and_extraction_problems
        exit(1)
      end
      nginx_prefix = ask_for_nginx_install_prefix
      check_whether_other_nginx_installations_exist(nginx_prefix)
      if @extra_configure_flags == "none"
        extra_nginx_configure_flags = nil
      else
        extra_nginx_configure_flags = @extra_configure_flags
      end
    else
      nginx_source_dir = ask_for_nginx_source_dir
      nginx_prefix = ask_for_nginx_install_prefix
      check_whether_other_nginx_installations_exist(nginx_prefix)
      extra_nginx_configure_flags = ask_for_extra_nginx_configure_flags(nginx_prefix)
    end
    check_whether_we_can_write_to(nginx_prefix) || exit(1)
    nginx_config_already_exists_before_installing = nginx_config_exists?(nginx_prefix)
    if needs_compiling_support_files?
      if !compile_passenger_support_files
        show_possible_solutions_for_compilation_and_installation_problems
        exit(1)
      end
    end
    if install_nginx(nginx_source_dir, nginx_prefix, extra_nginx_configure_flags)
      if nginx_config_already_exists_before_installing || !locate_nginx_config_file(nginx_prefix)
        show_passenger_config_snippets(nginx_prefix)
      else
        insert_passenger_config_snippets(nginx_prefix)
      end
      show_deployment_example
    else
      show_possible_solutions_for_compilation_and_installation_problems
      exit(1)
    end
  end

def before_install
    super
    myself = `whoami`.strip
    @working_dir = PhusionPassenger::Utils.mktmpdir("passenger.", PlatformInfo.tmpexedir)
  end

def after_install
    super
    FileUtils.remove_entry_secure(@working_dir) if @working_dir
  end

private
  def show_welcome_screen
    render_template 'nginx/welcome', :version => VERSION_STRING
    wait
  end

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

new_screen
 puts "<banner>Which languages are you interested in?</banner>"
 puts
 if interactive?
 puts "Use <space> to select."
 puts "<dgray>If the menu doesn't display correctly, press '!'</dgray>"
 else
 puts "Override selection with --languages."
 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_nginx_module_sources_available
    if PhusionPassenger.custom_packaged? &&
       (!PhusionPassenger.nginx_module_source_dir || !File.exist?(PhusionPassenger.nginx_module_source_dir))
      new_screen
      render_template 'nginx/nginx_module_sources_not_available'
      return false
    else
      return true
    end
  end

def needs_compiling_support_files?
    return !PhusionPassenger.build_system_dir.nil?
  end

def compile_passenger_support_files
 new_screen
 puts "<banner>Compiling Passenger support files...</banner>"
 Dir.chdir(PhusionPassenger.build_system_dir) do
 return sh("env NOEXEC_DISABLE=1 #{PlatformInfo.rake_command} nginx:clean nginx RELEASE=yes")
 end
 end

def should_we_download_and_install_nginx_automatically?
    new_screen
    render_template 'nginx/query_download_and_install',
      :nginx_version => PREFERRED_NGINX_VERSION
    puts

if @auto_download
 puts "=> Proceeding with choice 1."
 return true
 elsif @nginx_source_dir
 puts "=> Proceeding with choice 2."
 return false
 elsif @auto
 puts "=> Proceeding with choice 1."
 return true
 else
 choice = prompt("Enter your choice (1 or 2) or press Ctrl-C to abort") do |input|
 if input == "1" || input == "2"
 true
 elsif input.empty?
 puts "<red>No choice has been given.</red>"
 false
 else
 puts "<red>'#{input}' is not a valid choice.</red>"
 false
 end
 end
 return choice == "1"
 end
 end

def download_and_extract_pcre
 new_screen
 puts "<banner>PCRE (required by Nginx) not installed, downloading it...</banner>"

url = "https://github.com/PhilipHazel/pcre2/releases/download/pcre2-#{PREFERRED_PCRE_VERSION}/pcre2-#{PREFERRED_PCRE_VERSION}.tar.gz"
    dirname = "pcre2-#{PREFERRED_PCRE_VERSION}"
    tarball = "#{@working_dir}/pcre.tar.gz"

if download(url, tarball, DOWNLOAD_OPTION)
 Dir.chdir(@working_dir) do
 puts "<banner>Verifying PCRE checksum...</banner>"
 if sha256_file(tarball) != PCRE_SHA256_CHECKSUM
 new_screen
 render_template "nginx/pcre_checksum_could_not_be_verified"
 wait
 return nil
 end

puts "<banner>Extracting PCRE source tarball...</banner>"
 if sh("tar", "xzvf", tarball)
 return "#{@working_dir}/#{dirname}"
 else
 new_screen
 render_template "nginx/pcre_could_not_be_extracted"
 wait
 return nil
 end
 end
 else
 new_screen
 render_template "nginx/pcre_could_not_be_downloaded"
 wait
 return nil
 end
 rescue Interrupt
 exit 2
 end

def download_and_extract_nginx
 new_screen
 puts "<banner>Downloading Nginx...</banner>"

url = "https://nginx.org/download/nginx-#{PREFERRED_NGINX_VERSION}.tar.gz"
    dirname = "nginx-#{PREFERRED_NGINX_VERSION}"
    tarball = "#{@working_dir}/nginx.tar.gz"

if download(url, tarball, DOWNLOAD_OPTION)
 Dir.chdir(@working_dir) do
 puts "<banner>Verifying Nginx checksum...</banner>"
 if sha256_file(tarball) != NGINX_SHA256_CHECKSUM
 return nil
 end

puts "<banner>Extracting Nginx source tarball...</banner>"
 if sh("tar", "xzvf", tarball)
 return "#{@working_dir}/#{dirname}"
 else
 return nil
 end
 end
 else
 return nil
 end
 rescue Interrupt
 exit 2
 end

def show_possible_solutions_for_download_and_extraction_problems
    new_screen
    render_template "nginx/possible_solutions_for_download_and_extraction_problems"
    puts
  end

def ask_for_nginx_install_prefix
 new_screen
 puts "<banner>Where do you want to install Nginx to?</banner>"
 puts
 if @prefix
 puts "=> #{@prefix}"
 return @prefix
 elsif @auto
 puts "=> /opt/nginx"
 return "/opt/nginx"
 else
 prefix = prompt("Please specify a prefix directory [/opt/nginx]") do |input|
 if input.empty? || input =~ %r(/)
 true
 else
 puts "<red>Please specify an absolute path.</red>"
 false
 end
 end
 if prefix.empty?
 prefix = "/opt/nginx"
 end
 return prefix
 end
 end

def check_whether_other_nginx_installations_exist(nginx_prefix)
    check_for = [
      "/usr/bin/nginx",
      "/usr/sbin/nginx"
    ]
    existing_binary = nil
    check_for.each do |filename|
      if File.exist?(filename)
        existing_binary = filename
        break
      end
    end
    if existing_binary
      new_screen
      render_template 'nginx/other_nginx_installations_exist',
        :existing_binary => existing_binary,
        :prefix => nginx_prefix
      wait
    end
  end

def ask_for_nginx_source_dir
 new_screen
 puts "<banner>Where is your Nginx source code located?</banner>"
 puts
 if @nginx_source_dir
 puts "=> #{@nginx_source_dir}"
 return @nginx_source_dir
 else
 return prompt("Please specify the directory") do |input|
 if input =~ %r(/)
 if File.exist?("#{input}/src/core/nginx.c")
 true
 else
 puts "<red>'#{input}' does not look like an Nginx source directory.</red>"
 false
 end
 else
 puts "<red>Please specify an absolute path.</red>"
 false
 end
 end
 end
 end

def ask_for_extra_nginx_configure_flags(prefix)
 done = false
 while !done
 new_screen
 render_template 'nginx/ask_for_extra_configure_flags',
 :command => build_nginx_configure_command(prefix)
 puts
 if @extra_configure_flags
 if @extra_configure_flags == "none"
 extra_args = ""
 puts "=> No extra configure flags."
 else
 extra_args = @extra_configure_flags
 puts "=> #{extra_args}"
 end
 return extra_args
 elsif @auto
 puts "=> No extra configure flags."
 return ""
 else
 extra_args = prompt "Extra arguments to pass to configure script"

new_screen
 render_template 'nginx/confirm_extra_configure_flags',
 :command => build_nginx_configure_command(prefix, extra_args)
 puts
 answer = prompt("Is this what you want? (yes/no) [default=yes]") do |input|
 if input.empty? || input == "yes" || input == "no"
 true
 else
 puts "<red>Please enter 'yes' or 'no'.</red>"
 false
 end
 end
 done = answer.empty? || answer == "yes"
 end
 end
 return extra_args
 end

def check_whether_we_can_write_to(dir)
    FileUtils.mkdir_p(dir)
    File.new("#{dir}/__test__.txt", "w").close
    return true
  rescue
    new_screen
    if Process.uid == 0
      render_template 'nginx/cannot_write_to_dir', :dir => dir
    else
      render_template 'installer_common/run_installer_as_root',
        :dir  => dir,
        :sudo => PhusionPassenger::PlatformInfo.ruby_sudo_command,
        :sudo_s_e => PhusionPassenger::PlatformInfo.ruby_sudo_shell_command("-E"),
        :ruby => PhusionPassenger::PlatformInfo.ruby_command,
        :installer => "#{PhusionPassenger.bin_dir}/passenger-install-nginx-module #{ORIG_ARGV.join(' ')}"
    end
    return false
  ensure
    File.unlink("#{dir}/__test__.txt") rescue nil
  end

def nginx_config_exists?(prefix)
    return !!locate_nginx_config_file(prefix)
  end

def install_nginx(source_dir, prefix, extra_configure_flags)
 Dir.chdir(source_dir) do
 new_screen
 puts "<banner>Compiling and installing Nginx...</banner>"
 if !sh(build_nginx_configure_command(prefix, extra_configure_flags)) ||
 !sh("make") ||
 !sh("make install")
 return false
 end
 end
 return true
 rescue Interrupt
 raise Aborted
 end

def show_passenger_config_snippets(prefix)
    new_screen
    render_template 'nginx/config_snippets',
      :config_file => locate_nginx_config_file(prefix),
      :passenger_root => PhusionPassenger.install_spec,
      :ruby => PlatformInfo.ruby_command
    wait
  end

def show_deployment_example
    line
    puts
    render_template 'nginx/deployment_example',
      :deployment_guide_url => "https://www.phusionpassenger.com/library/deploy/nginx/deploy/",
      :phusion_website => PHUSION_WEBSITE,
      :passenger_website => PASSENGER_WEBSITE
  end

def show_possible_solutions_for_compilation_and_installation_problems
    line
    puts
    render_template 'nginx/possible_solutions_for_compilation_and_installation_problems',
      :support_url => SUPPORT_URL
  end

def locate_nginx_config_file(prefix)
    ["#{prefix}/conf/nginx.conf", "#{prefix}/etc/nginx.conf"].each do |filename|
      if File.exist?(filename)
        return filename
      end
    end
    return nil
  end

def insert_passenger_config_snippets(prefix)
 config_file = locate_nginx_config_file(prefix)
 contents = File.read(config_file)
 contents.sub!(/^http \{/,
 "http {\n" <<
 " passenger_root #{PhusionPassenger.install_spec};\n" <<
 " passenger_ruby #{PlatformInfo.ruby_command};\n")
 File.open(config_file, 'w') do |f|
 f.write(contents)
 end

new_screen
    render_template 'nginx/config_snippets_inserted',
      :config_file => config_file,
      :passenger_root => PhusionPassenger.install_spec,
      :ruby => PlatformInfo.ruby_command
    wait
  end

def build_nginx_configure_command(prefix, extra_configure_flags = nil)
    # When USE_ASAN is set, we compile our own code with AddressSanitizer but not Nginx.
    # It's a third-party codebase we don't control so enabling AddressSanitizer for
    # Nginx as well is more likely to hurt than help.
    extra_cflags = [
      "-Wno-error",
      PlatformInfo.openssl_extra_cflags,
    ].compact.join(" ").strip

extra_ldflags = [
      PlatformInfo.openssl_extra_ldflags,
      boolean_option('USE_ASAN') ? PlatformInfo.address_sanitizer_flags : nil,
    ].compact.join(" ").strip

command = "sh ./configure --prefix='#{prefix}' "
 command << "--with-http_ssl_module "
 command << "--with-http_v2_module "
 command << "--with-http_realip_module "
 command << "--with-http_gzip_static_module "
 command << "--with-http_stub_status_module "
 command << "--with-http_addition_module "
 command << "--with-cc-opt=#{Shellwords.escape extra_cflags} "
 command << "--with-ld-opt=#{Shellwords.escape extra_ldflags} "
 if @pcre_source_dir
 command << "--with-pcre='#{@pcre_source_dir}' "
 elsif !pcre_is_installed?
 command << "--without-http_rewrite_module "
 end
 command << "--add-module='#{PhusionPassenger.nginx_module_source_dir}' #{extra_configure_flags}"
 command.strip!
 return command
 end

def pcre_is_installed?
 if @pcre_is_installed.nil?
 Dir.mktmpdir do |safe_tmpdir|
 @pcre_is_installed = begin
 File.open("#{safe_tmpdir}/passenger-check.c", 'w') do |f|
 f.puts("#include <pcre2.h>")
 end
 Dir.chdir("#{safe_tmpdir}") do
 # Nginx checks for PCRE in multiple places...
 system("(gcc -I/usr/local/include -I/usr/include/pcre2 " <<
 "-I/usr/pkg/include -I/opt/local/include " <<
 "-I/opt/homebrew/include " <<
 "-DPCRE2_CODE_UNIT_WIDTH=8 " <<
 "-c passenger-check.c) >/dev/null 2>/dev/null")
 end
 ensure
 File.unlink("#{safe_tmpdir}/passenger-check.c") rescue nil
 File.unlink("#{safe_tmpdir}/passenger-check.o") rescue nil
 end
 end
 end
 return @pcre_is_installed
 end

def sha256_file(path)
    # We do this instead of using #file, for Ruby 1.8.5 support.
    digest = Digest::SHA256.new
    File.open(path, "rb") do |f|
      buf = ''
      buf.force_encoding('binary') if buf.respond_to?(:force_encoding)
      while !f.eof?
        f.read(1024 * 16, buf)
        digest.update(buf)
      end
    end
    return digest.hexdigest
  end

def boolean_option(name)
    ["1", "on", "true", "yes"].include?(ENV[name])
  end
end

ORIG_ARGV = ARGV.dup
options = {}
parser = OptionParser.new do |opts|
  opts.banner = "Usage: passenger-install-nginx-module [options]"
  opts.separator ""

indent = ' ' * 37
 opts.separator "Options:"
 opts.on("--auto", "Automatically confirm 'Press ENTER to\n" <<
 "#{indent}continue' prompts.") do
 options[:auto] = true
 end
 opts.on("--prefix=DIR", String, "Use the given Nginx install prefix instead\n" <<
 "#{indent}of asking for it interactively.") do |dir|
 options[:prefix] = dir
 end
 opts.on("--auto-download", "Download and install Nginx automatically,\n" <<
 "#{indent}instead of asking interactively whether to\n" <<
 "#{indent}download+install or to use an existing\n" <<
 "#{indent}Nginx source directory.") do
 options[:auto_download] = true
 end
 opts.on("--nginx-source-dir=DIR", String, "Compile and install Nginx using the given\n" <<
 "#{indent}Nginx source directory, instead of\n" <<
 "#{indent}interactively asking to download+install\n" <<
 "#{indent}or to use an existing Nginx source\n" <<
 "#{indent}directory. Conflicts with --auto-download.") do |dir|
 options[:nginx_source_dir] = dir
 end
 opts.on("--extra-configure-flags=STRING", String, "Pass these extra flags to Nginx's\n" <<
 "#{indent}'configure' script, instead of asking for\n" <<
 "#{indent}it interactively. Specify 'none' if you\n" <<
 "#{indent}do not want to pass additional flags but do\n" <<
 "#{indent}not want this installer to ask\n" <<
 "#{indent}interactively either.") do |flags|
 options[:extra_configure_flags] = flags
 end
 opts.on("--languages NAMES", "Comma-separated list of interested\n" <<
 "#{indent}languages (e.g.\n" <<
 "#{indent}'ruby,python,nodejs,meteor')") do |value|
 options[:languages] = value.split(",")
 end
 opts.on("--force-colors", "Display colors even if stdout is not a TTY") do
 options[:colorize] = true
 end
end
begin
 parser.parse!
rescue OptionParser::ParseError => e
 puts e
 puts
 puts "Please see '--help' for valid options."
 exit 1
end

if options[:auto_download] && options[:nginx_source_dir]
  STDERR.puts "You cannot specify both --auto-download and --nginx-source-dir."
  exit 1
end

Installer.new(options).run

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