Added Module parameter to Build-PSBuildUpdatableHelp (#55)

* Added Module parameter and an [IO.Path]::Combine()

The Module parameter removes the dependency on the $ModuleName variable in the parent scope while maintaining the existing behavior of inheriting its value.

* The LandingPagePath key in $cabParams now uses the [IO.Path]::Combine([string[]]) method rather than manual string concatenation

Author: IMJLA

PowerShellBuild/Public/Build-PSBuildUpdatableHelp.ps1

@@ -8,6 +8,8 @@ function Build-PSBuildUpdatableHelp {
         Path to PlatyPS markdown help files.
     .PARAMETER OutputPath
         Path to create updatable help .cab file in.
+    .PARAMETER Module
+        Name of the module to create a .cab file for. Defaults to the $ModuleName variable from the parent scope.
     .EXAMPLE
         PS> Build-PSBuildUpdatableHelp -DocsPath ./docs -OutputPath ./Output/UpdatableHelp
 
@@ -19,7 +21,9 @@ function Build-PSBuildUpdatableHelp {
         [string]$DocsPath,
 
         [parameter(Mandatory)]
-        [string]$OutputPath
+        [string]$OutputPath,
+
+        [string]$Module = $ModuleName
     )
 
     if ($null -ne $IsWindows -and -not $IsWindows) {
@@ -42,7 +46,7 @@ function Build-PSBuildUpdatableHelp {
     foreach ($locale in $helpLocales) {
         $cabParams = @{
             CabFilesFolder  = [IO.Path]::Combine($moduleOutDir, $locale)
-            LandingPagePath = "$DocsPath/$locale/$ModuleName.md"
+            LandingPagePath = [IO.Path]::Combine($DocsPath, $locale, "$Module.md")
             OutputFolder    = $OutputPath
             Verbose         = $VerbosePreference
         }