Merge pull request #92 from jrdnr/(GH-90)_Cache_InstalledPackages_for…

…_faster_run

(GH-90) Implemented Caching Package list to File

DSCResources/cChocoPackageInstall/cChocoPackageInstall.psm1

@@ -1,4 +1,4 @@
-# Copyright (c) 2017 Chocolatey Software, Inc.
+# Copyright (c) 2017 Chocolatey Software, Inc.
 # Copyright (c) 2013 - 2017 Lawrence Gripper & original authors/contributors from https://github.com/chocolatey/cChoco
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -244,6 +244,9 @@ function InstallPackage
     $packageInstallOuput = Invoke-Expression -Command "choco install $pName $chocoinstallparams"
     Write-Verbose -Message "Package output $packageInstallOuput "
 
+    # Clear Package Cache
+    Get-ChocoInstalledPackage 'Purge'
+
     #refresh path varaible in powershell, as choco doesn"t, to pull in git
     $env:Path = [Environment]::GetEnvironmentVariable('Path','Machine')
 }
@@ -273,6 +276,9 @@ function UninstallPackage
 
     Write-Verbose -Message "Package uninstall output $packageUninstallOuput "
 
+    # Clear Package Cache
+    Get-ChocoInstalledPackage 'Purge'
+
     #refresh path varaible in powershell, as choco doesn"t, to pull in git
     $env:Path = [Environment]::GetEnvironmentVariable('Path','Machine')
 }
@@ -393,10 +399,31 @@ Function Upgrade-Package {
 
     $packageUpgradeOuput = Invoke-Expression -Command $cmd
     $packageUpgradeOuput | ForEach-Object { Write-Verbose -Message $_ }
+
+    # Clear Package Cache
+    Get-ChocoInstalledPackage 'Purge'
 }
 
-function Get-ChocoInstalledPackage {
-    Return (choco list -lo -r | ConvertFrom-Csv -Header 'Name', 'Version' -Delimiter "|")
+function Get-ChocoInstalledPackage ($action) {
+    $ChocoInstallLP = Join-Path -Path $env:ChocolateyInstall -ChildPath 'cache'
+    if ( -not (Test-Path $ChocoInstallLP)){
+        New-Item -Name 'cache' -Path $env:ChocolateyInstall -ItemType Directory | Out-Null
+    }
+    $ChocoInstallList = Join-Path -Path $ChocoInstallLP -ChildPath 'ChocoInstalled.xml'
+
+    if ($action -eq 'Purge') {
+        Remove-Item $ChocoInstallList -Force
+        $res = $true
+    } else {
+        $PackageCacheSec = (Get-Date).AddSeconds('-60')
+        if ( $PackageCacheSec -lt (Get-Item $ChocoInstallList -ErrorAction SilentlyContinue).LastWriteTime ) {
+                $res = Import-Clixml $ChocoInstallList
+        } else {
+            choco list -lo -r | ConvertFrom-Csv -Header 'Name', 'Version' -Delimiter "|" -OutVariable res | Export-Clixml -Path $ChocoInstallList
+        }
+    }
+
+    Return $res
 }
 
 Export-ModuleMember -Function *-TargetResource