Dependency/Install-DependencyWebDownload.ps1
|
function Install-DependencyWebDownload { Param( [Parameter(Mandatory)] [string] # The name of the dependency as set in the dependency config file $Name, [Parameter(Mandatory)] [string] # The version $Version, [Parameter(Mandatory)] [string] # Where to get the package from $Url, [Parameter(Mandatory)] [string] # The destination folder to install to (if required). The Name will be added as an additional folder $Destination, [parameter()] [switch] # By default we won't install if already installed. Force will first remove then install again $Force ) # always put in a seperate folder to prevent dll clashes etc $destinationFolder = Join-Path $Destination $Name $versionFile = Join-Path $destinationFolder 'version.txt' # If it isn't an archive, then it will be a normal file $isArchive = [System.IO.Path]::GetExtension((Split-Path -Leaf $Url)) -eq '.zip' if ($isArchive) { $intermediatePath = ([System.IO.Path]::GetTempFileName()) -replace "\.tmp", ".zip" } else { $intermediatePath = Join-Path $destinationFolder ([System.IO.Path]::GetFileName((Split-Path -Leaf $Url))) } try { # If we are forcing then remove what was there before if ($Force -and (Test-Path -Path $destinationFolder)) { Write-Verbose "Removing $destinationFolder" Remove-Item -Path $destinationFolder -Recurse -Force } # if folder already exists then check the version $existingVersion = [Version]"0.0" if (Test-Path -Path $destinationFolder) { if (Test-Path -Path $versionFile) { $existingVersion = [Version](Get-Content $versionFile) Write-Verbose "existing version is $existingVersion from $versionFile" } else { Write-Verbose "no version file exists, assuming version 0.0. checked $versionFile" } } else { Write-Verbose "destination folder $destinationFolder doesn't exist" } $requiredVersion = [Version]$Version Write-Verbose "required version is $requiredVersion" # only download and unpack if the folder doesn't already exist or if the version is higher if ($existingVersion -lt $requiredVersion) { Write-Host "$Name is at $existingVersion but $requiredVersion is required. Upgrading." # first remove any existing files to make sure we have a clean landing area if ((Test-Path -Path $destinationFolder)) { Write-Verbose "Removing $destinationFolder" Remove-Item -Path $destinationFolder -Recurse -Force } # create the folder and version file New-Item -Path $destinationFolder -ItemType directory -Force > $null New-Item -Path $versionFile -value $Version > $null # Download the file [Net.ServicePointManager]::SecurityProtocol = "tls12, tls11, tls" ## Most modern websites mandate higher levels of SSL encryption. This ensures that the highest is selected first. Write-Verbose "Downloading '$url' to '$intermediatePath'" Invoke-WebRequest -Uri $url -OutFile $intermediatePath # Extract if is archive if ($isArchive) { Write-Verbose "Extracting '$intermediatePath' to '$destinationFolder'" Expand-Archive -Path $intermediatePath -DestinationPath $destinationFolder -Force } } else { Write-Host "$Name $Version is already installed" } } finally { if ($isArchive -and (Test-Path $intermediatePath)) { Remove-Item -Path $intermediatePath -Force } } } |