Class: Vagrant::Util::PowerShell

Inherits:
Object
  • Object
show all
Defined in:
lib/vagrant/util/powershell.rb

Overview

Executes PowerShell scripts.

This is primarily a convenience wrapper around Subprocess that properly sets powershell flags for you.

Constant Summary collapse

MINIMUM_REQUIRED_VERSION =

NOTE: Version checks are only on Major

3
DEFAULT_VERSION_DETECTION_TIMEOUT =

Number of seconds to wait while attempting to get powershell version

30
LOGGER = 
Log4r::Logger.new("vagrant::util::powershell")

Class Method Summary collapse

Class Method Details

.available? ⇒ Boolean

Returns powershell executable available on PATH.

Returns:

  • (Boolean) —

    powershell executable available on PATH



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# File 'lib/vagrant/util/powershell.rb', line 46

def self.available?
  !executable.nil?
end

.executable ⇒ String|nil

Returns a powershell executable, depending on environment.

Returns:

  • (String|nil) —

    a powershell executable, depending on environment



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# File 'lib/vagrant/util/powershell.rb', line 20

def self.executable
  if !defined?(@_powershell_executable)
    @_powershell_executable = "powershell"

    if Which.which(@_powershell_executable).nil?
      # Try to use WSL interoperability if PowerShell is not symlinked to
      # the container.
      if Platform.wsl?
        @_powershell_executable += ".exe"

        if Which.which(@_powershell_executable).nil?
          @_powershell_executable = "/mnt/c/Windows/System32/WindowsPowerShell/v1.0/powershell.exe"

          if Which.which(@_powershell_executable).nil?
            @_powershell_executable = nil
          end
        end
      else
        @_powershell_executable = nil
      end
    end
  end
  @_powershell_executable
end

.execute(path, *args, **opts, &block) ⇒ Subprocess::Result

Execute a powershell script.

Parameters:

  • path (String) —

    Path to the PowerShell script to execute.

  • args (Array<String>) —

    Command arguments

  • opts (Hash) —

    Options passed to execute

Options Hash (**opts):

  • :env (Hash) —

    Custom environment variables

Returns:



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# File 'lib/vagrant/util/powershell.rb', line 57

def self.execute(path, *args, **opts, &block)
  validate_install!
  if opts.delete(:sudo) || opts.delete(:runas)
    powerup_command(path, args, opts)
  else
    if mpath = opts.delete(:module_path)
      m_env = opts.fetch(:env, {})
      m_env["PSModulePath"] = "$env:PSModulePath+';#{mpath}'"
      opts[:env] = m_env
    end
    if env = opts.delete(:env)
      env = env.map{|k,v| "$env:#{k}=#{v}"}.join(";") + "; "
    end
    command = [
      executable,
      "-NoLogo",
      "-NoProfile",
      "-NonInteractive",
      "-ExecutionPolicy", "Bypass",
      "#{env}&('#{path}')",
      args
    ].flatten

    # Append on the options hash since Subprocess doesn't use
    # Ruby 2.0 style options yet.
    command << opts

    Subprocess.execute(*command, &block)
  end
end

.execute_cmd(command, **opts) ⇒ nil, String

Execute a powershell command.

Parameters:

  • command (String) —

    PowerShell command to execute.

  • opts (Hash) —

    Extra options

Options Hash (**opts):

  • :env (Hash) —

    Custom environment variables

Returns:

  • (nil, String) —

    Returns nil if exit code is non-zero. Returns stdout string if exit code is zero.



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# File 'lib/vagrant/util/powershell.rb', line 95

def self.execute_cmd(command, **opts)
  validate_install!
  if mpath = opts.delete(:module_path)
    m_env = opts.fetch(:env, {})
    m_env["PSModulePath"] = "$env:PSModulePath+';#{mpath}'"
    opts[:env] = m_env
  end
  if env = opts.delete(:env)
    env = env.map{|k,v| "$env:#{k}=#{v}"}.join(";") + "; "
  end
  c = [
    executable,
    "-NoLogo",
    "-NoProfile",
    "-NonInteractive",
    "-ExecutionPolicy", "Bypass",
    "-Command",
    "#{env}#{command}"
  ].flatten.compact

  r = Subprocess.execute(*c)
  return nil if r.exit_code != 0
  return r.stdout.chomp
end

.execute_inline(*command, **opts, &block) ⇒ Object

Execute a powershell command and return a result

Parameters:

  • command (String) —

    PowerShell command to execute.

  • opts (Hash) —

    A collection of options for subprocess::execute

  • block (Block) —

    Ruby block

Options Hash (**opts):

  • :env (Hash) —

    Custom environment variables



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# File 'lib/vagrant/util/powershell.rb', line 126

def self.execute_inline(*command, **opts, &block)
  validate_install!
  if mpath = opts.delete(:module_path)
    m_env = opts.fetch(:env, {})
    m_env["PSModulePath"] = "$env:PSModulePath+';#{mpath}'"
    opts[:env] = m_env
  end
  if env = opts.delete(:env)
    env = env.map{|k,v| "$env:#{k}=#{v}"}.join(";") + "; "
  end

  command = command.join(' ')

  c = [
    executable,
    "-NoLogo",
    "-NoProfile",
    "-NonInteractive",
    "-ExecutionPolicy", "Bypass",
    "-Command",
    "#{env}#{command}"
  ].flatten.compact
  c << opts

  Subprocess.execute(*c, &block)
end

.powerup_command(path, args, opts) ⇒ Array<String>

Powerup the given command to perform privileged operations.

Parameters:

  • path (String)
  • args (Array<String>)

Returns:

  • (Array<String>) 


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# File 'lib/vagrant/util/powershell.rb', line 210

def self.powerup_command(path, args, opts)
  Dir.mktmpdir("vagrant") do |dpath|
    all_args = [path] + args.flatten.map{ |a|
      a.gsub(/^['"](.+)['"]$/, "\\1")
    }
    arg_list = "\"" + all_args.join("\" \"") + "\""
    stdout = File.join(dpath, "stdout.txt")
    stderr = File.join(dpath, "stderr.txt")

    script = "& #{arg_list} ; exit $LASTEXITCODE;"
    script_content = Base64.strict_encode64(script.encode("UTF-16LE", "UTF-8"))

    # Wrap so we can redirect output to read later
    wrapper = "$p = Start-Process -FilePath powershell -ArgumentList @('-NoLogo', '-NoProfile', " \
      "'-NonInteractive', '-ExecutionPolicy', 'Bypass', '-EncodedCommand', '#{script_content}') " \
      "-PassThru -WindowStyle Hidden -Wait -RedirectStandardOutput '#{stdout}' -RedirectStandardError '#{stderr}'; " \
      "if($p){ exit $p.ExitCode; }else{ exit 1 }"
    wrapper_content = Base64.strict_encode64(wrapper.encode("UTF-16LE", "UTF-8"))

    powerup = "$p = Start-Process -FilePath powershell -ArgumentList @('-NoLogo', '-NoProfile', " \
      "'-NonInteractive', '-ExecutionPolicy', 'Bypass', '-EncodedCommand', '#{wrapper_content}') " \
      "-PassThru -WindowStyle Hidden -Wait -Verb RunAs; if($p){ exit $p.ExitCode; }else{ exit 1 }"

    cmd = [
      "powershell",
      "-NoLogo",
      "-NoProfile",
      "-NonInteractive",
      "-ExecutionPolicy", "Bypass",
      "-Command", powerup
    ]

    result = Subprocess.execute(*cmd.push(opts))
    r_stdout = result.stdout
    if File.exist?(stdout)
      r_stdout += File.read(stdout)
    end
    r_stderr = result.stderr
    if File.exist?(stderr)
      r_stderr += File.read(stderr)
    end

    Subprocess::Result.new(result.exit_code, r_stdout, r_stderr)
  end
end

.reset! ⇒ Object

Reset the cached values for platform. This is not considered a public API and should only be used for testing.



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# File 'lib/vagrant/util/powershell.rb', line 259

def self.reset!
  instance_variables.each(&method(:remove_instance_variable))
end

.validate_install! ⇒ Boolean

Validates that powershell is installed, available, and at or above minimum required version

Returns:

  • (Boolean) 


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# File 'lib/vagrant/util/powershell.rb', line 192

def self.validate_install!
  if !defined?(@_powershell_validation)
    raise Errors::PowerShellNotFound if !available?
    if version.to_i < MINIMUM_REQUIRED_VERSION
      raise Errors::PowerShellInvalidVersion,
        minimum_version: MINIMUM_REQUIRED_VERSION,
        installed_version: version ? version : "N/A"
    end
    @_powershell_validation = true
  end
  @_powershell_validation
end

.version ⇒ String

Returns the version of PowerShell that is installed.

Returns:

  • (String) 


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# File 'lib/vagrant/util/powershell.rb', line 156

def self.version
  if !defined?(@_powershell_version)
    command = [
      executable,
      "-NoLogo",
      "-NoProfile",
      "-NonInteractive",
      "-ExecutionPolicy", "Bypass",
      "-Command",
      "Write-Output $PSVersionTable.PSVersion.Major"
    ].flatten

    version = nil
    timeout = ENV["VAGRANT_POWERSHELL_VERSION_DETECTION_TIMEOUT"].to_i
    if timeout < 1
      timeout = DEFAULT_VERSION_DETECTION_TIMEOUT
    end
    begin
      r = Subprocess.execute(*command,
        notify: [:stdout, :stderr],
        timeout: timeout,
      ) {|io_name,data| version = data}
    rescue Vagrant::Util::Subprocess::TimeoutExceeded
      LOGGER.debug("Timeout exceeded while attempting to determine version of Powershell.")
    end

    @_powershell_version = version
  end
  @_powershell_version
end