feat: bundle multi-arch offline images into fnOS package

build.ps1

@@ -1,5 +1,6 @@
 param(
-  [string]$FnpackPath = ""
+  [string]$FnpackPath = "",
+  [switch]$SkipImageExport
 )
 
 $ErrorActionPreference = "Stop"
@@ -7,6 +8,79 @@ $root = (Resolve-Path (Join-Path $PSScriptRoot "..")).Path
 $project = Join-Path $root "fnos\havline"
 $version = (Get-Content -Raw (Join-Path $root "havline\VERSION")).Trim()
 
+function Resolve-DockerCli {
+  if ($env:DOCKER_BIN) { return $env:DOCKER_BIN }
+  $command = Get-Command docker -ErrorAction SilentlyContinue
+  if ($command) { return $command.Source }
+  $default = "C:\Program Files\Docker\Docker\resources\bin\docker.exe"
+  if (Test-Path -LiteralPath $default) { return $default }
+  throw "找不到 docker 命令"
+}
+
+function Export-OfflineImage {
+  param(
+    [string]$DockerBin,
+    [string]$BuildContext,
+    [string]$Platform,
+    [string]$Arch,
+    [string]$Version,
+    [string]$OutputDir
+  )
+
+  $tarName = "havline-$Version-$Arch.tar"
+  $tar = Join-Path $OutputDir $tarName
+  $gz = Join-Path $OutputDir "havline-$Version-$Arch.tar.gz"
+
+  Push-Location $BuildContext
+  try {
+    & $DockerBin buildx build `
+      --platform $Platform `
+      --build-arg VERSION_FILE=VERSION `
+      --provenance=false `
+      --sbom=false `
+      --output "type=docker,name=havline:$Version,dest=$tar" `
+      .
+    if ($LASTEXITCODE -ne 0) {
+      throw "导出 $Arch 镜像失败，退出码：$LASTEXITCODE"
+    }
+  }
+  finally {
+    Pop-Location
+  }
+
+  Compress-GzipFile -Source $tar -Destination $gz
+
+  Remove-Item -LiteralPath $tar -Force
+  Write-Output "镜像归档：$gz"
+}
+
+function Compress-GzipFile {
+  param(
+    [string]$Source,
+    [string]$Destination
+  )
+
+  $sourceStream = [System.IO.File]::OpenRead($Source)
+  try {
+    $targetStream = [System.IO.File]::Create($Destination)
+    try {
+      $gzip = New-Object System.IO.Compression.GZipStream($targetStream, [System.IO.Compression.CompressionLevel]::Optimal)
+      try {
+        $sourceStream.CopyTo($gzip)
+      }
+      finally {
+        $gzip.Dispose()
+      }
+    }
+    finally {
+      $targetStream.Dispose()
+    }
+  }
+  finally {
+    $sourceStream.Dispose()
+  }
+}
+
 if (-not (Test-Path -LiteralPath $project)) {
   throw "找不到飞牛应用工程：$project"
 }
@@ -24,6 +98,24 @@ if ($LASTEXITCODE -ge 8) {
   throw "复制飞牛应用工程失败，robocopy 退出码：$LASTEXITCODE"
 }
 
+$imageDir = Join-Path $stage "app\docker"
+New-Item -ItemType Directory -Force $imageDir | Out-Null
+
+if (-not $SkipImageExport) {
+  $dockerBin = Resolve-DockerCli
+  $buildContext = Join-Path $root "havline"
+  Export-OfflineImage -DockerBin $dockerBin -BuildContext $buildContext -Platform "linux/amd64" -Arch "amd64" -Version $version -OutputDir $imageDir
+  Export-OfflineImage -DockerBin $dockerBin -BuildContext $buildContext -Platform "linux/arm64" -Arch "arm64" -Version $version -OutputDir $imageDir
+}
+else {
+  foreach ($arch in @("amd64", "arm64")) {
+    $required = Join-Path $imageDir "havline-$version-$arch.tar.gz"
+    if (-not (Test-Path -LiteralPath $required)) {
+      throw "缺少离线镜像：$required"
+    }
+  }
+}
+
 Push-Location $PSScriptRoot
 try {
   & $FnpackPath build -d $stage
@@ -35,6 +127,8 @@ try {
   New-Item -ItemType Directory -Force $dist | Out-Null
   Copy-Item -LiteralPath $output -Destination (Join-Path $dist "havline-$version.fpk") -Force
   Write-Output "FPK: $(Join-Path $dist "havline-$version.fpk")"
+  $sizeMB = [math]::Round((Get-Item (Join-Path $dist "havline-$version.fpk")).Length / 1MB, 1)
+  Write-Output "FPK 大小：$sizeMB MB"
 }
 finally {
   Pop-Location