PostInstall script for build agent

install.ps1

[CmdletBinding()]
param (
    [Parameter(Mandatory)]
    [string]
    $AzureDevopsUrl,

    [Parameter(Mandatory)]
    [string]
    $AzureDevopsPat,

    [Parameter(Mandatory)]
    [string]
    $AgentPoolName
)
# Install PowerShell 7.1
Invoke-WebRequest -Uri "https://github.com/PowerShell/PowerShell/releases/download/v7.1.0/PowerShell-7.1.0-win-x64.msi" -OutFile .\pwsh.msi
Start-Process msiexec.exe -Wait -ArgumentList '/I pwsh.msi /quiet ADD_EXPLORER_CONTEXT_MENU_OPENPOWERSHELL=0 ENABLE_PSREMOTING=0 REGISTER_MANIFEST=0'
rm .\pwsh.msi

# Install az cli
Invoke-WebRequest -Uri https://aka.ms/installazurecliwindows -OutFile .\AzureCLI.msi
Start-Process msiexec.exe -Wait -ArgumentList '/I AzureCLI.msi /quiet'
rm .\AzureCLI.msi

# Install azure devops agent
mkdir C:\agent
Set-Location C:\agent
Invoke-WebRequest -Uri "https://vstsagentpackage.azureedge.net/agent/2.179.0/vsts-agent-win-x64-2.179.0.zip" -OutFile .\agent.zip
Add-Type -AssemblyName System.IO.Compression.FileSystem
[System.IO.Compression.ZipFile]::ExtractToDirectory("C:\agent\agent.zip", "C:\agent")
rm agent.zip
.\config.cmd --unattended --url $AzureDevopsUrl --auth pat --token $AzureDevopsPat --pool $AgentPoolName --runAsService