node-versions/builders/node-builder.psm1

class NodeBuilder {
    <#
    .SYNOPSIS
    Base Node.js builder class.

    .DESCRIPTION
    Base Node.js builder class that contains general builder methods.

    .PARAMETER Version
    The version of Node.js that should be built.

    .PARAMETER Platform
    The platform of Node.js that should be built.

    .PARAMETER Architecture
    The architecture with which Node.js should be built.

    .PARAMETER TempFolderLocation
    The location of temporary files that will be used during Node.js package generation. Using system BUILD_STAGINGDIRECTORY variable value.

    .PARAMETER ArtifactLocation
    The location of generated Node.js artifact. Using system environment BUILD_BINARIESDIRECTORY variable value.

    .PARAMETER InstallationTemplatesLocation
    The location of installation script template. Using "installers" folder from current repository.

    #>

    [version] $Version
    [string] $Platform
    [string] $Architecture
    [string] $TempFolderLocation
    [string] $WorkFolderLocation
    [string] $ArtifactFolderLocation
    [string] $InstallationTemplatesLocation

    NodeBuilder ([version] $version, [string] $platform, [string] $architecture) {
        $this.Version = $version
        $this.Platform = $platform
        $this.Architecture = $architecture

        $this.TempFolderLocation = [IO.Path]::GetTempPath()
        $this.WorkFolderLocation = $env:BUILD_BINARIESDIRECTORY
        $this.ArtifactFolderLocation = $env:BUILD_STAGINGDIRECTORY
        

        $this.InstallationTemplatesLocation = Join-Path -Path $PSScriptRoot -ChildPath "../installers"
    }

    [uri] GetBaseUri() {
        <#
        .SYNOPSIS
        Return base URI for Node.js binaries.
        #>

        return "https://nodejs.org/download/release"
    }

    [string] Download() {
        <#
        .SYNOPSIS
        Download Node.js binaries into artifact location.
        #>

        $binariesUri = $this.GetBinariesUri()
        $targetFilename = [IO.Path]::GetFileName($binariesUri)
        $targetFilepath = Join-Path -Path $this.TempFolderLocation -ChildPath $targetFilename

        Write-Debug "Download binaries from $binariesUri to $targetFilepath"
        try {
            (New-Object System.Net.WebClient).DownloadFile($binariesUri, $targetFilepath)
        } catch {
            Write-Host "Error during downloading file from '$binariesUri'"
            exit 1
        }

        Write-Debug "Done; Binaries location: $targetFilepath"
        return $targetFilepath
    }

    [void] Build() {
        <#
        .SYNOPSIS
        Generates Node.js artifact from downloaded binaries.
        #>

        Write-Host "Download Node.js $($this.Version) [$($this.Architecture)] executable..."
        $binariesArchivePath = $this.Download()

        Write-Host "Unpack binaries to target directory"
        $this.ExtractBinaries($binariesArchivePath)

        Write-Host "Create installation script..."
        $this.CreateInstallationScript()

        Write-Host "Archive artifact"
        $this.ArchiveArtifact()
    }
}