Added support for install_options argument.

install_options can now be specified to allow additional arguments to be passed to the PowerShell Install-Module command, e.g.

    package { 'foobarmodule':
        ensure => latest,
        provider => 'windowspowershell',
        source => 'PSGallery',
        install_options => [ '-AllowClobber' ]
    }

README.md

@@ -149,6 +149,7 @@ package { 'xPSDesiredStateConfiguration':
   ensure   => latest,
   provider => 'windowspowershell',
   source   => 'PSGallery',
+  install_options => [ '-AllowClobber' ]
 }
 
 package { 'Pester':

lib/puppet/provider/package/powershellcore.rb

@@ -3,7 +3,7 @@
 
 Puppet::Type.type(:package).provide :powershellcore, parent: Puppet::Provider::Package do
   initvars
-  has_feature :installable, :uninstallable, :upgradeable, :versionable
+  has_feature :installable, :uninstallable, :upgradeable, :versionable, :install_options
   commands pwsh: 'pwsh'
 
   def self.invoke_ps_command(command)
@@ -44,6 +44,32 @@ def update
     self.class.invoke_ps_command update_command
   end
 
+  # Turns a array of install_options into flags to be passed to a command.
+  # The options can be passed as a string or hash. Note that passing a hash
+  # should only be used in case "-foo bar" must be passed,
+  # Regular flags like '-foobar' must be passed as a string.
+  # which can be accomplished with:
+  #     install_options => [ '-foobar',{ '-foo' => 'bar' } ]
+  # This will result in the following being passed as arguments to the command:
+  #     -foobar -foo bar
+  # @param options [Array]
+  # @return Concatenated list of options
+  # @api private
+  def install_options
+    return unless @resource[:install_options]
+
+    @resource[:install_options].collect do |val|
+      case val
+        when Hash
+          val.keys.sort.collect do |k|
+            "#{k} #{val[k]}"
+          end
+        else
+          val
+      end
+    end.flatten.join(" ")
+  end
+
   def self.instances_command
     # Get-Package is way faster than Get-InstalledModule
     <<-COMMAND
@@ -62,6 +88,7 @@ def install_command
     command = "Install-Module #{@resource[:name]} -Scope AllUsers -Force"
     command << " -RequiredVersion #{@resource[:ensure]}" unless [:present, :latest].include? @resource[:ensure]
     command << " -Repository #{@resource[:source]}" if @resource[:source]
+    command << " #{install_options}" if @resource[:install_options]
     command
   end
 
@@ -76,6 +103,7 @@ def latest_command
   def update_command
     command = "Install-Module #{@resource[:name]} -Scope AllUsers -Force"
     command << " -Repository #{@resource[:source]}" if @resource[:source]
+    command << " #{install_options}" if @resource[:install_options]
     command
   end
 end

lib/puppet/provider/package/windowspowershell.rb

@@ -2,7 +2,7 @@
   initvars
   confine operatingsystem: :windows
   confine feature: :powershellgetwindows
-  has_feature :installable, :uninstallable, :upgradeable, :versionable
+  has_feature :installable, :uninstallable, :upgradeable, :versionable, :install_options
   commands powershell: 'powershell'
 
   def self.invoke_ps_command(command)