Microsoft Azure PowerShell

$ErrorActionPreference = 'Stop'
Set-StrictMode -Version 2

$packageName = 'azurepowershell'
$moduleVersion = [version]'6.9.0'
$url = 'https://github.com/Azure/azure-powershell/releases/download/v6.9.0-September2018/azure-powershell.6.9.0.msi'
$checksum = '6938baf0cee2448665bd2d2c88840491b2203758ac2a589f844b6889e774e6d6'
$checksumType = 'SHA256'

. (Join-Path -Path (Split-Path -Path $MyInvocation.MyCommand.Path) -ChildPath helpers.ps1)

Ensure-RequiredPowerShellVersionPresent -RequiredVersion '5.0'

if (Test-AzurePowerShellInstalled -RequiredVersion $moduleVersion)
{
    return
}

$scriptDirectory = $PSScriptRoot # safe to use because we test for PS 3.0+ earlier
$originalMsiLocalPath = Join-Path -Path $scriptDirectory -ChildPath "azure-powershell.${moduleVersion}.msi"

$downloadArguments = @{
    packageName = $packageName
    fileFullPath = $originalMsiLocalPath
    url = $url
    checksum = $checksum
    checksumType = $checksumType
}

Set-StrictMode -Off # unfortunately, builtin helpers are not guaranteed to be strict mode compliant
Get-ChocolateyWebFile @downloadArguments | Out-Null
Set-StrictMode -Version 2

$instArguments = @{
    packageName = $packageName
    installerType = 'msi'
    file = $originalMsiLocalPath
    silentArgs = '/Quiet /NoRestart /Log "{0}\{1}_{2:yyyyMMddHHmmss}.log"' -f $Env:TEMP, $packageName, (Get-Date)
    validExitCodes = @(
        0, # success
        3010 # success, restart required
    )
}

Set-StrictMode -Off
Install-ChocolateyInstallPackage @instArguments

Write-Warning 'You may need to close and reopen PowerShell before the Azure PowerShell modules become available.'

$ErrorActionPreference = 'Stop'
Set-StrictMode -Version 2

Set-Variable -Option Constant -Scope Script -Name msiOpenDatabaseModeReadOnly -Value 0
Set-Variable -Option Constant -Scope Script -Name msiOpenDatabaseModeTransact -Value 1
Set-Variable -Option Constant -Scope Script -Name msiTransformErrorNone -Value 0
Set-Variable -Option Constant -Scope Script -Name msiTransformValidationNone -Value 0

function Ensure-RequiredPowerShellVersionPresent
{
    [CmdletBinding()]
    Param
    (
        [Parameter(Mandatory = $true)] [version] $RequiredVersion
    )

    # 3.0 is the absolute minimum requirement, but future packages might require a newer version
    if (-not (Test-Path -Path "HKLM:\Software\Microsoft\PowerShell\3") -or $PSVersionTable -eq $null -or $PSVersionTable.PSVersion -lt [version]$RequiredVersion)
    {
        throw "Azure PowerShell requires PowerShell version $RequiredVersion or greater. You can install it using the 'powershell' package." 
    }
    else
    {
        Write-Debug "Running on PowerShell $RequiredVersion or later (actually: $($PSVersionTable.PSVersion))"
    }
}

function Test-AzurePowerShellInstalled
{
    [CmdletBinding()]
    Param
    (
        [Parameter(Mandatory = $true)] [version] $RequiredVersion
    )

    $newestModule = Get-Module -Name AzureRM.* -ListAvailable | Sort-Object -Property Version -Descending | Select-Object -First 1
    if ($newestModule -ne $null -and $newestModule.Version -ge $RequiredVersion)
    {
        Write-Host "Azure PowerShell version $RequiredVersion or later is already installed (detected module $($newestModule.Name) version $($newestModule.Version))."
        return $true
    }
    else
    {
        if ($newestModule -ne $null)
        {
            Write-Debug "Azure PowerShell version $RequiredVersion or later is not installed (detected module $($newestModule.Name) version $($newestModule.Version))."
        }
        else
        {
            Write-Debug "Azure PowerShell version $RequiredVersion or later is not installed (no modules detected)."
        }

        return $false
    }
}