Initial commit

Get-Software.ps1

@@ -0,0 +1,107 @@
+<#
+
+.SYNOPSIS
+Gathers a list of installed software on a given computer.
+
+.DESCRIPTION
+Gathers the list of software installed for a given computer or set of computers.
+
+.PARAMETER Path
+Path to use to export the CSV report. If the path is not specified,
+results are output to the running terminal.
+
+.PARAMETER ComputerName
+Specifies the computers on which the command runs. The default is the local computer.
+
+.PARAMETER Credential
+Credential that should be used to connect to a remote machine.
+
+.NOTES
+  Version:        1.0
+  Author:         Tyler Hale
+  Creation Date:  2021.09.18
+
+#>
+
+[CmdletBinding()]
+param (
+    [Parameter(Mandatory=$false)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $Path,
+    [Parameter(Mandatory = $false)]
+    [ValidateScript( {Test-Connection $_ -Count 2})]
+    [alias('Cn')]
+    [string[]]
+    $ComputerName = $env:COMPUTERNAME,
+    [Parameter(Mandatory=$false, ValueFromPipeline=$true)]
+    [ValidateNotNull()]
+    [System.Management.Automation.PSCredential]
+    [System.Management.Automation.Credential()]
+    $Credential = [System.Management.Automation.PSCredential]::Empty
+)
+
+############################################### [Script Settings] ################################################
+
+# Locations where software is registered
+$RegistryPaths = @(
+    "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*"
+    "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*"
+)
+
+############################################# [Internal Processing] ##############################################
+
+<# Build Remote Parameters #>
+# Reference by appending @RemoteParameters to a command
+$RemoteParameters = @{}
+
+if ($ComputerName -ne $env:COMPUTERNAME) {
+    Write-Verbose "Adding $ComputerName to Remote Parameters splat variable"
+    $RemoteParameters['ComputerName'] = $ComputerName
+}
+
+if ($Credential -ne [System.Management.Automation.PSCredential]::Empty) {
+    Write-Verbose "Adding provided credentials to Remote Parameters splat variable"
+    $RemoteParameters['Credential'] = $Credential
+}
+
+# Create Inventory variable
+$SoftwareInventories = @()
+
+# Get the current date for logging
+$DateCollected = (Get-Date -Format o)
+
+################################################## [Execution] ###################################################
+
+foreach ($Computer in $ComputerName) {
+    $SoftwareInventory = $null
+
+    $SoftwareInventory = foreach ($RegistryEntry in $RegistryPaths) {
+        Write-Verbose "Processing $RegistryEntry"
+
+        foreach ($Entry in (Invoke-command {Get-ItemProperty $args[0] } -ArgumentList $RegistryEntry @RemoteParameters)) {
+            # If DisplayName exists add it to the software inventory
+            if (($null,'' -ne $Entry.DisplayName)) {
+                [pscustomobject][ordered]@{
+                    "Name" = $Entry.DisplayName
+                    "Version" = $Entry.DisplayVersion
+                    "Publisher" = $Entry.Publisher
+                    "Install Size" = $Entry.EstimatedSize
+                    "Install Location" = $Entry.InstallLocation
+                    "Uninstall String" = $Entry.UninstallString
+                    "Computer Name" = $Computer
+                    "Date Collected" = $DateCollected
+                }
+            }
+        }
+    }
+    $SoftwareInventories += $SoftwareInventory | Sort-Object Name
+}
+
+if ($Path -ne "") {
+    $SoftwareInventories | Export-Csv $Path -Force -NoTypeInformation
+    Write-Host "Software Inventories have been exported to $Path"
+}
+else {
+    return $SoftwareInventories
+}

README.md

@@ -1,19 +1,21 @@
 # Get-Software
 
-Gathers a list of installed software on a given machine.
-
-## Requirements
+Gathers a list of installed software on a given computer or set of computers.
 
 ## Variables
 
-| Variable | Required | Default | Choices | Description |
-| -------- | -------- | ------- | ------- | ----------- |
-|          |          |         |         |             |
+|   Variable   | Required |    Default    | Choices |                          Description                          |
+| ------------ | -------- | ------------- | ------- | ------------------------------------------------------------- |
+| Path         | No       |               |         | Path to use to export the CSV report                          |
+| ComputerName | No       | Local Machine |         | Specifies the computers on which the command runs             |
+| Credential   | No       | Running User  |         | Credential that should be used to connect to a remote machine |
 
 ## Example
 
+```powershell
+.\Get-Software.ps1
+```
+
 ## License
 
 See LICENSE file for full license information.
-
-## Screenshots