Adding ability to convert yaml directly from file

PSYaml/Public/ConvertFrom-Yaml.ps1

@@ -1,16 +1,55 @@
-function ConvertFrom-Yaml
-    {
+function ConvertFrom-Yaml {
+
+    <#
+    .SYNOPSIS
+        Converts YAML files into PowerShell objects.
+
+    .DESCRIPTION
+        Converts YAML files into PowerShell objects. Can be invoked either directly from Array String or File Path.
+        Parameters are mutually exclusive.
+
+    .PARAMETER YamlString
+        Converts YAML string into PowerShell Array.
+
+    .PARAMETER Path
+        Converts YAML file into PowerShell Array.
+
+    .EXAMPLE
+        ConvertFrom-Yaml -Path C:\test.yaml
+
+    .EXAMPLE
+        @(get-content -Path C:\test.yaml) | ConvertFrom-Yaml
+
+    .LINK
+        https://github.com/RamblingCookieMonster/PSDeploy/blob/master/PSDeploy/Private/PSYaml/Private/YamlDotNet-Integration.ps1
+
+    .NOTES
+        Link above shows where I got the file import from.
+
+    #>
     [CmdletBinding()]
     param
     (
-    [parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $true)]
-    $YamlString
+    [parameter(Position = 0, Mandatory = $false, ValueFromPipeline = $true)]
+    $YamlString,
+    [parameter(Position = 1, Mandatory = $false, ValueFromPipeline = $false)]
+    $Path
     )
 BEGIN { }
 PROCESS
-    {$stringReader = new-object System.IO.StringReader([string]$yamlString)
-    $yamlStream = New-Object YamlDotNet.RepresentationModel.YamlStream
-    $yamlStream.Load([System.IO.TextReader]$stringReader)
-    ConvertFrom-YAMLDocument ($yamlStream.Documents[0])}
+    {
+        If($Path){
+            $streamReader = [System.IO.File]::OpenText($Path)
+            $yamlStream = New-Object YamlDotNet.RepresentationModel.YamlStream
+            $yamlStream.Load([System.IO.TextReader]$streamReader)
+            ConvertFrom-YAMLDocument ($yamlStream.Documents[0])
+        }
+        Else{
+            $stringReader = new-object System.IO.StringReader([string]$yamlString)
+            $yamlStream = New-Object YamlDotNet.RepresentationModel.YamlStream
+            $yamlStream.Load([System.IO.TextReader]$stringReader)
+            ConvertFrom-YAMLDocument ($yamlStream.Documents[0])
+        }
+    }
 END {}
 }