PowerShell Hashicorp App Downloader

gistfile1.txt

<# 
    Hashicorp recent app downloader
    - Find and download the most recent versions of Hashicorp applications as defined in 
    $HashicorpPackages. Ignores all plugins and providers.
#>
$HashicorpReleaseManifestURL = 'https://releases.hashicorp.com/index.json'

# Update this to change the packages you want to download
$HashicorpPackages = @('vagrant','terraform','vault')

# Change for whatever platform you want to download for
$HashicorpOS = 'windows'

# Architecture to download for (default is 64 bit)
$HashicorpArch = "amd64|x86_64"

# Need this to download via Invoke-WebRequest
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$req = (Invoke-WebRequest -Uri $HashicorpReleaseManifestURL).Content | ConvertFrom-JSON

<# 
    function to find the most recent version in the json manifest

    Note: We ignore anything not in strict x.x.x version format (betas and such)
#>
function Get-HashiCorpLatestVersion {
    param(
        $manifest,
        $software
    )

    (($manifest.$software.versions | get-member -MemberType 'NoteProperty').Name | Where {$_ -match "^\d+\.\d+\.\d+$"} | Foreach {[version]$_} | Sort-Object -Descending | Select -First 1).ToString()
}

function Get-AllHashiCorpPackageLatestVersion {
    <#
    .SYNOPSIS
    Retreives the most recent version of Hashicorp software packages from a json manifest
    .DESCRIPTION
    Retreives the most recent version of Hashicorp software packages from a json manifest
    .PARAMETER manifest
    JSON manifest data to search.
    .EXAMPLE
    Get-AllHashiCorpPackageLatestVersion
    .NOTES
    Author: Zachary Loeber
    #>
    param(
        $manifest
    )

    $OutHash = @{}

    $manifest | Get-Member -MemberType 'NoteProperty' | Foreach {
        $OutHash.($_.Name) = Get-HashiCorpLatestVersion $manifest $_.Name
    }

    $OutHash
}

$req | Get-Member -MemberType 'NoteProperty' | Where {$_.Name -notmatch 'provider|plugin'} | Foreach {
    $software = $_.Name
    $recentversion = Get-HashiCorpLatestVersion $req $software
    if ($HashicorpPackages -contains $software) {
        Write-Output "Found $software - $recentversion"
        $req.$software.Versions.$recentversion.builds | Where {($_.os -eq $HashicorpOS) -and ($_.arch -match $HashicorpArch)} | Foreach {
            Invoke-WebRequest -Uri $_.url -OutFile $_.filename
        }
    }
}