增加Windows构建RESTIC PS1脚本，TODO:预计将RESTIC二进制内置在私有目录中执行

Author: Fastace

build/download_restic.ps1

@@ -0,0 +1,88 @@
+# 设置错误处理
+$ErrorActionPreference = "Stop"
+$ProgressPreference = 'SilentlyContinue'
+
+$RESTIC_VERSION = "0.18.1"
+
+# --- 1. 确保 7-Zip 已安装 ---
+function Ensure-7Zip {
+    if (Get-Command "7z" -ErrorAction SilentlyContinue) {
+        return "7z"
+    }
+
+    $path7z = "${env:ProgramFiles}\7-Zip\7z.exe"
+    if (Test-Path $path7z) {
+        return $path7z
+    }
+
+    Write-Host "[-] 未找到 7-Zip，正在尝试通过 winget 安装..." -ForegroundColor Yellow
+    try {
+        # 使用 winget 静默安装 7-Zip
+        Start-Process winget -ArgumentList "install --id 7zip.7zip --silent --accept-source-agreements --accept-package-agreements" -Wait
+        if (Test-Path $path7z) { return $path7z }
+    } catch {
+        Write-Error "自动安装 7-Zip 失败，请手动安装: https://www.7-zip.org/"
+    }
+
+    throw "无法定位 7z 命令行工具。"
+}
+
+$Global:ZipExe = Ensure-7Zip
+
+# --- 2. 下载与解压逻辑 ---
+function Download-ResticBinary {
+    param (
+        [string]$resticArch,
+        [string]$androidArch
+    )
+
+    $currentDir = Get-Location
+    $targetPath = Join-Path $currentDir "source/app/src/main/jniLibs/$androidArch"
+
+    if (-not (Test-Path $targetPath)) {
+        New-Item -ItemType Directory -Path $targetPath -Force | Out-Null
+    }
+
+    $resticFile = "restic_${RESTIC_VERSION}_linux_${resticArch}.bz2"
+    $url = "https://github.com/restic/restic/releases/download/v${RESTIC_VERSION}/$resticFile"
+    $tempFile = Join-Path $targetPath $resticFile
+    $finalFile = Join-Path $targetPath "librestic.so"
+
+    Write-Host "`n[+] Processing: $androidArch" -ForegroundColor Cyan
+
+    # 下载
+    Write-Host "    Downloading..." -NoNewline
+    Invoke-WebRequest -Uri $url -OutFile $tempFile
+    Write-Host " Done." -ForegroundColor Green
+
+    # 解压
+    Write-Host "    Decompressing via 7-Zip..." -NoNewline
+
+    # 7-Zip 解压 bz2 会产生一个去掉 .bz2 后缀的文件
+    # -y: 自动确认, -so: 输出到标准输出 (类似 bzip2 -dc)
+    try {
+        if (Test-Path $finalFile) { Remove-Item $finalFile -Force }
+
+        # 使用 & 调用变量存储的路径，并重定向输出流
+        & $Global:ZipExe x "$tempFile" -so > "$finalFile"
+
+        if ((Get-Item "$finalFile").Length -gt 1MB) {
+            Write-Host " Success." -ForegroundColor Green
+            Remove-Item $tempFile -Force
+        } else {
+            throw "解压文件损坏或体积异常。"
+        }
+    } catch {
+        Write-Host " Failed." -ForegroundColor Red
+        Write-Error $_
+    }
+}
+
+# --- 3. 执行任务 ---
+Download-ResticBinary "arm64" "arm64-v8a"
+Download-ResticBinary "arm"   "armeabi-v7a"
+Download-ResticBinary "amd64" "x86_64"
+Download-ResticBinary "386"   "x86"
+
+$ProgressPreference = 'Continue'
+Write-Host "`n[!] 所有架构处理完毕。" -ForegroundColor Green