Remove dependency to win32-api gem

Recently we fail to load win32-api on Ruby 3.2-dev:
https://github.com/fluent/fluentd/runs/7660210030?check_suite_focus=true

  D:/rubyinstaller-head-x64/lib/ruby/gems/3.2.0+2/gems/windows-api-0.4.5/lib/windows/api.rb:335:in `initialize': uninitialized constant Win32::API (NameError)
        @api = Win32::API.new(func, proto, rtype, dll)
                    ^^^^^
          from D:/rubyinstaller-head-x64/lib/ruby/gems/3.2.0+2/gems/windows-pr-1.2.6/lib/windows/msvcrt/string.rb:12:in `new'

but Fluentd doesn't seem depend on win32-api so much.
Using Fiddle is enough instead. It's time to drop win32-api gem.

Signed-off-by: Takuro Ashie <ashie@clear-code.com>

fluentd.gemspec

@@ -34,12 +34,9 @@ Gem::Specification.new do |gem|
   fake_platform = ENV['GEM_BUILD_FAKE_PLATFORM'].to_s
   gem.platform = fake_platform unless fake_platform.empty?
   if /mswin|mingw/ =~ fake_platform || (/mswin|mingw/ =~ RUBY_PLATFORM && fake_platform.empty?)
-    gem.add_runtime_dependency("win32-api", [">= 1.10", "< 2.0.0"])
     gem.add_runtime_dependency("win32-service", ["~> 2.3.0"])
     gem.add_runtime_dependency("win32-ipc", ["~> 0.7.0"])
     gem.add_runtime_dependency("win32-event", ["~> 0.6.3"])
-    gem.add_runtime_dependency("windows-api", ["~> 0.4.5"])
-    gem.add_runtime_dependency("windows-pr", ["~> 1.2.6"])
     gem.add_runtime_dependency("certstore_c", ["~> 0.1.7"])
   end
 

lib/fluent/command/fluentd.rb

@@ -189,9 +189,6 @@
 }
 
 if Fluent.windows?
-  require 'windows/library'
-  include Windows::Library
-
   opts.merge!(
     :winsvc_name => 'fluentdwinsvc',
     :winsvc_display_name => 'Fluentd Windows Service',
@@ -292,9 +289,7 @@
   case winsvcinstmode
   when 'i'
     binary_path = File.join(File.dirname(__FILE__), "..")
-    ruby_path = "\0" * 256
-    GetModuleFileName.call(0,ruby_path,256)
-    ruby_path = ruby_path.rstrip.gsub(/\\/, '/')
+    ruby_path = ServerEngine.ruby_bin_path
     start_type = Service::DEMAND_START
     if opts[:regwinsvcautostart]
       start_type = Service::AUTO_START

lib/fluent/plugin/file_wrapper.rb

@@ -35,20 +35,36 @@ def self.stat(path)
     end
   end
 
-  class WindowsFile
-    require 'windows/file'
-    require 'windows/handle'
+  module Win32API
+    require 'fiddle/import'
+    require 'fiddle/types'
+    extend Fiddle::Importer
+
+    if RUBY_PLATFORM.split('-')[-1] == "ucrt"
+      MSVCRT_DLL = 'ucrtbase.dll'
+    else
+      MSVCRT_DLL = 'msvcrt.dll'
+    end
 
+    dlload MSVCRT_DLL, "kernel32.dll"
+    include Fiddle::Win32Types
+
+    extern "intptr_t _get_osfhandle(int)"
+    extern "int GetFileInformationByHandle(HANDLE, void *)"
+    extern "int GetFileInformationByHandleEx(HANDLE, int, void *, DWORD)"
+  end
+
+  class WindowsFile
     include File::Constants
-    include Windows::File
-    include Windows::Handle
 
     attr_reader :io
 
+    INVALID_HANDLE_VALUE = -1
+
     def initialize(path, mode='r')
       @path = path
       @io = File.open(path, mode2flags(mode))
-      @file_handle = _get_osfhandle(@io.to_i)
+      @file_handle = Win32API._get_osfhandle(@io.to_i)
       @io.instance_variable_set(:@file_index, self.ino)
       def @io.ino
         @file_index
@@ -68,7 +84,7 @@ def close
     def ino
       by_handle_file_information = '\0'*(4+8+8+8+4+4+4+4+4+4)   #72bytes
 
-      unless GetFileInformationByHandle.call(@file_handle, by_handle_file_information)
+      unless Win32API.GetFileInformationByHandle(@file_handle, by_handle_file_information)
         return 0
       end
 
@@ -122,7 +138,7 @@ def delete_pending
       bufsize = 1024
       buf = '\0' * bufsize
 
-      unless GetFileInformationByHandleEx.call(@file_handle, file_standard_info, buf, bufsize)
+      unless Win32API.GetFileInformationByHandleEx(@file_handle, file_standard_info, buf, bufsize)
         return false
       end
 

lib/fluent/supervisor.rb

@@ -32,12 +32,6 @@
 require 'serverengine'
 
 if Fluent.windows?
-  require 'windows/library'
-  require 'windows/synchronize'
-  require 'windows/system_info'
-  include Windows::Library
-  include Windows::Synchronize
-  include Windows::SystemInfo
   require 'win32/ipc'
   require 'win32/event'
 end
@@ -235,7 +229,8 @@ def install_windows_event_handler
         end
         begin
           loop do
-            ipc_idx = ipc.wait_any(events.map {|e| e[:win32_event]}, Windows::Synchronize::INFINITE)
+            infinite = 0xFFFFFFFF
+            ipc_idx = ipc.wait_any(events.map {|e| e[:win32_event]}, infinite)
             event_idx = ipc_idx - 1
 
             if event_idx >= 0 && event_idx < events.length

lib/fluent/winsvc.rb

@@ -17,14 +17,10 @@
 begin
 
   require 'optparse'
-  require 'windows/debug'
-  require 'Windows/Library'
   require 'win32/daemon'
   require 'win32/event'
 
   include Win32
-  include Windows::Library
-  include Windows::Debug
 
   op = OptionParser.new
   opts = {service_name: nil}
@@ -37,16 +33,14 @@
   end 
 
   def read_fluentdopt(service_name)
-    require 'win32/Registry'
+    require 'win32/registry'
     Win32::Registry::HKEY_LOCAL_MACHINE.open("SYSTEM\\CurrentControlSet\\Services\\#{service_name}") do |reg|
       reg.read("fluentdopt")[1] rescue ""
     end
   end
 
   def service_main_start(service_name)
-    ruby_path = 0.chr * 260
-    GetModuleFileName.call(0, ruby_path,260)
-    ruby_path = ruby_path.rstrip.gsub(/\\/, '/')
+    ruby_path = ServerEngine.ruby_bin_path
     rubybin_dir = ruby_path[0, ruby_path.rindex("/")]
     opt = read_fluentdopt(service_name)
     Process.spawn("\"#{rubybin_dir}/ruby.exe\" \"#{rubybin_dir}/fluentd\" #{opt} -x #{service_name}")

test/plugin/test_file_wrapper.rb

@@ -2,11 +2,6 @@
 require 'fluent/plugin/file_wrapper'
 
 class FileWrapperTest < Test::Unit::TestCase
-  require 'windows/file'
-  require 'windows/error'
-  include Windows::File
-  include Windows::Error
-
   TMP_DIR = File.dirname(__FILE__) + "/../tmp/file_wrapper#{ENV['TEST_ENV_NUMBER']}"
 
   def setup