adds support for wsl2

lib/vagrant-hostmanager/hosts_file/updater.rb

@@ -55,13 +55,34 @@ def update_host
  # copy and modify hosts file on host with Vagrant-managed entries
  file = @global_env.tmp_path.join('hosts.local')
 
- if WindowsSupport.windows?
+ if WindowsSupport.windows? || WindowsSupport.wsl?
  # lazily include windows Module
  class << self
  include WindowsSupport unless include? WindowsSupport
  end
- hosts_location = "#{ENV['WINDIR']}\\System32\\drivers\\etc\\hosts"
- copy_proc = Proc.new { windows_copy_file(file, hosts_location) }
+ windir = ENV['WINDIR']
+ if WindowsSupport.wsl?
+ Dir.chdir('/mnt/c'){
+ windir = `cmd.exe /c echo %WINDIR%`.strip
+ }
+ # convert wsl path to windows path
+ if file.to_s =~ /\/mnt\/[a-z]\//
+ win_file = file.to_s.sub(/^\/mnt\/([a-z])\//, '\1:\\').gsub('/', '\\')
+ else
+ win_file = "\\\\wsl\$\\#{ENV['WSL_DISTRO_NAME']}" + file.to_s.gsub('/', '\\')
+ end
+ win_hosts_location = "#{windir}\\System32\\drivers\\etc\\hosts"
+ hosts_location = "/mnt/" + windir[0].downcase + "/" + windir[3..-1] + "/System32/drivers/etc/hosts"
+
+ # add to both, windows host and wsl machine
+ copy_proc = Proc.new {
+ wsl_copy_file(file, hosts_location, win_file, win_hosts_location)
+ `[ -w "/etc/hosts" ] && cat "#{file}" > "/etc/hosts" || sudo cp "#{file}" "/etc/hosts"`
+ }
+ else
+ hosts_location = "#{windir}\\System32\\drivers\\etc\\hosts"
+ copy_proc = Proc.new { windows_copy_file(file, hosts_location) }
+ end
  line_endings = "crlf"
  else
  hosts_location = '/etc/hosts'
@@ -70,6 +91,9 @@ class << self
  end
 
  FileUtils.cp(hosts_location, file)
+ if WindowsSupport.wsl?
+ FileUtils.chmod("+w", file)
+ end
 
  if update_file(file, nil, true, line_endings)
  copy_proc.call
@@ -183,6 +207,10 @@ def self.windows?
  RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/
  end
 
+ def self.wsl?
+ defined?(ENV['WSLENV'])
+ end
+
  require 'win32ole' if windows?
 
  def windows_copy_file(source, dest)
@@ -195,6 +223,16 @@ def windows_copy_file(source, dest)
  end
  end
 
+ def wsl_copy_file(source, dest, win_source, win_dest)
+ begin
+ # First, try Ruby copy
+ FileUtils.cp(source, dest)
+ rescue Errno::EACCES
+ # Access denied, try with elevated privileges
+ system('powershell.exe', 'Start-Process -Verb Runas -FilePath cmd.exe -Argumentlist "/C","copy","' + win_source + '","' + win_dest + '"')
+ end
+ end
+
  private
 
  def windows_copy_file_elevated(source, dest)