local-ci-cd-system/scripts/Invoke-RemoteBuild.ps1

#Requires -Version 5.1
<#
.SYNOPSIS
    Copies pre-cloned source from host into a build VM and runs dotnet build.

.DESCRIPTION
    The caller (Invoke-CIJob.ps1) is responsible for cloning the repository
    on the HOST before calling this script. This script then:
      1. Compresses the local source tree on the host, copies the archive into
         the VM via WinRM (single file = much faster than recursive Copy-Item),
         then expands it inside the VM.
      2. Runs dotnet restore and dotnet build inside the VM
      3. Packages the output as C:\CI\output\artifacts.zip inside the VM

    The build VM does NOT need internet access or git. All network I/O happens
    on the host before this script is called.

.PARAMETER IPAddress
    IP of the build VM (e.g. 192.168.11.101).

.PARAMETER Credential
    PSCredential for the build user inside the VM.
    Retrieve from Windows Credential Manager in production:
      $cred = Get-StoredCredential -Target 'BuildVMGuest'

.PARAMETER HostSourceDir
    Full path on the HOST to the already-cloned repository directory.
    This directory is copied into the VM as the build working directory.
    Example: C:\Users\user\AppData\Local\Temp\ci-src-run-42

.PARAMETER Configuration
    MSBuild/dotnet build configuration. Default: Release

.PARAMETER GuestWorkDir
    Working directory inside the VM where source will be placed.
    Default: C:\CI\build

.PARAMETER GuestArtifactZip
    Full path inside the VM where the artifact archive will be written.
    Default: C:\CI\output\artifacts.zip

.EXAMPLE
    $cred = Get-Credential
    .\Invoke-RemoteBuild.ps1 `
        -IPAddress      "192.168.11.101" `
        -Credential     $cred `
        -HostSourceDir  "C:\Temp\ci-src-run-42"
#>
[CmdletBinding()]
param(
    [Parameter(Mandatory)]
    [ValidatePattern('^(\d{1,3}\.){3}\d{1,3}$')]
    [string] $IPAddress,

    [Parameter(Mandatory)]
    [System.Management.Automation.PSCredential] $Credential,

    [Parameter(Mandatory)]
    [ValidateScript({ Test-Path $_ -PathType Container })]
    [string] $HostSourceDir,

    [string] $Configuration = 'Release',

    # Custom build command to run inside the VM (working dir = GuestWorkDir).
    # When empty, defaults to: dotnet restore + dotnet build --configuration $Configuration
    # Example: 'python build_plugin.py --final'
    [string] $BuildCommand = '',

    # Glob pattern (relative to GuestWorkDir) of files to include in the artifact zip.
    # Used only when BuildCommand is set. Default: collect everything under 'dist'.
    # Example: 'dist\**' or 'Contrib\nsInnoUnp\Build\**'
    [string] $GuestArtifactSource = 'dist',

    [string] $GuestWorkDir = 'C:\CI\build',

    [string] $GuestArtifactZip = 'C:\CI\output\artifacts.zip'
)

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

# ── Session options: skip SSL certificate checks for self-signed (lab use) ──
$sessionOptions = New-PSSessionOption -SkipCACheck -SkipCNCheck -SkipRevocationCheck

Write-Host "[Invoke-RemoteBuild] Connecting to VM at $IPAddress..."

$session = New-PSSession `
    -ComputerName  $IPAddress `
    -Credential    $Credential `
    -SessionOption $sessionOptions `
    -ErrorAction   Stop

try {
    # ── Ensure working directories exist on guest ────────────────────────
    Invoke-Command -Session $session -ScriptBlock {
        param($workDir, $outputDir)
        foreach ($dir in @($workDir, (Split-Path $outputDir -Parent))) {
            if (-not (Test-Path $dir)) {
                New-Item -ItemType Directory -Path $dir -Force | Out-Null
            }
        }
        # Clean previous build if present
        if (Test-Path $workDir) {
            Remove-Item $workDir -Recurse -Force
        }
        New-Item -ItemType Directory -Path $workDir -Force | Out-Null
    } -ArgumentList $GuestWorkDir, $GuestArtifactZip

    # ── Copy source tree: compress on host, transfer zip, expand in guest ──
    # Single-file transfer over WinRM is far faster than recursive Copy-Item.
    $hostZip = [System.IO.Path]::GetTempFileName() -replace '\.tmp$', '.zip'
    try {
        Write-Host "[Invoke-RemoteBuild] Compressing source on host..."
        Compress-Archive -Path "$HostSourceDir\*" -DestinationPath $hostZip -CompressionLevel Fastest -Force
        $zipSize = [math]::Round((Get-Item $hostZip).Length / 1MB, 1)
        Write-Host "[Invoke-RemoteBuild] Transferring archive to guest ($zipSize MB)..."
        $guestZip = 'C:\CI\src-transfer.zip'
        Copy-Item -Path $hostZip -Destination $guestZip -ToSession $session -Force
        Write-Host "[Invoke-RemoteBuild] Expanding archive in guest..."
        Invoke-Command -Session $session -ScriptBlock {
            param($zip, $dest)
            Expand-Archive -Path $zip -DestinationPath $dest -Force
            Remove-Item $zip -Force
        } -ArgumentList $guestZip, $GuestWorkDir
        Write-Host "[Invoke-RemoteBuild] Source transfer complete."
    }
    finally {
        Remove-Item $hostZip -Force -ErrorAction SilentlyContinue
    }

    # ── Build ──────────────────────────────────────────────────────────
    if ($BuildCommand -ne '') {
        # ── Custom build command (e.g. python, msbuild, cmake…) ──────────
        Write-Host "[Invoke-RemoteBuild] Running build command: $BuildCommand"
        $buildExit = Invoke-Command -Session $session -ScriptBlock {
            param($workDir, $cmd, $artifactZip, $artifactSrc)
            # Unbuffered Python output — lines appear in real-time instead of being held in buffer
            $env:PYTHONUNBUFFERED = '1'
            Set-Location $workDir
            # Stream each output line via Write-Host — WinRM forwards Write-Host in real-time
            & cmd /c "$cmd 2>&1" | ForEach-Object { Write-Host $_ }
            $exit = $LASTEXITCODE

            if ($exit -eq 0) {
                $archiveDir = Split-Path $artifactZip -Parent
                if (-not (Test-Path $archiveDir)) {
                    New-Item -ItemType Directory -Path $archiveDir -Force | Out-Null
                }
                $srcPath = Join-Path $workDir $artifactSrc
                Compress-Archive -Path $srcPath -DestinationPath $artifactZip -Force
            }

            return $exit
        } -ArgumentList $GuestWorkDir, $BuildCommand, $GuestArtifactZip, $GuestArtifactSource

        if ($buildExit -ne 0) {
            throw "Build command failed (exit $buildExit)"
        }
    }
    else {
        # ── Default: dotnet restore + dotnet build ────────────────────────
        Write-Host "[Invoke-RemoteBuild] Running dotnet restore..."
        $restoreExit = Invoke-Command -Session $session -ScriptBlock {
            param($workDir)
            Set-Location $workDir
            dotnet restore 2>&1 | ForEach-Object { Write-Host $_ }
            return $LASTEXITCODE
        } -ArgumentList $GuestWorkDir

        if ($restoreExit -ne 0) {
            throw "dotnet restore failed (exit $restoreExit)"
        }

        Write-Host "[Invoke-RemoteBuild] Running dotnet build (configuration: $Configuration)..."
        $buildExit = Invoke-Command -Session $session -ScriptBlock {
            param($workDir, $config, $artifactZip)
            Set-Location $workDir
            $outputDir = Join-Path $workDir 'bin\CIOutput'
            dotnet build --configuration $config --output $outputDir 2>&1 | ForEach-Object { Write-Host $_ }
            $exit = $LASTEXITCODE

            if ($exit -eq 0) {
                $archiveDir = Split-Path $artifactZip -Parent
                if (-not (Test-Path $archiveDir)) {
                    New-Item -ItemType Directory -Path $archiveDir -Force | Out-Null
                }
                Compress-Archive -Path "$outputDir\*" -DestinationPath $artifactZip -Force
            }

            return $exit
        } -ArgumentList $GuestWorkDir, $Configuration, $GuestArtifactZip

        if ($buildExit -ne 0) {
            throw "dotnet build failed (exit $buildExit)"
        }
    }

    Write-Host "[Invoke-RemoteBuild] Build succeeded. Artifact at $GuestArtifactZip"
}
finally {
    Remove-PSSession $session -ErrorAction SilentlyContinue
}