powershell 备份文件脚本

￡神魔★判官ぃ 2022-07-12 15:55 378阅读 0赞

由于项目需要改写备份文件的程序.

(原来的解决方案是用vb6 去遍历文件， 不吐槽了)

需求1： 检查每个文件的修改时间， 如果小于日期参数， 则备份（和删除）；

需求2：保留被备份文件的目录结构。

linux下备份文件很简单， 可惜我们只有windows Server。

百度不到。

为了性能花了2小时写了个powershell 脚本...

话说MS的东西跟开源方案比起来基本上都是垃圾。

例如C\#比java， windows server 比linux， powershell比bash等等...

1个xargs解决的东西我tmd写了个循环。

mdzz.

$scriptName = "archive.ps1";
    if (!($args.count -eq 3)){
      write-host("Usage - " + $scriptName + " <<Source Path>> <<Destination Path>> <<beforeDate>>");
      exit -1;
    }
    
    $pathFrom = $args[0];
    $pathTo = $args[1];
    $dateBefore = [datetime]::ParseExact($args[2],"yyyy-MM-dd",$null);
    write-host("source path is: " + $pathFrom);
    write-host("destination path is: " + $pathTo);
    write-host("archive files whose modified date is before: " + $dateBefore);
    
    if (!((Test-path -path $pathFrom) -and (Test-path -path $pathTo))){
      write-host("source path or destination path is not existed!");
      exit -1;
    }
    
    $pathCopyTo = "";
    $pathFromLen = $pathFrom.Length;
    $LenGap = 0;
    $LenGap2 = 0;
    
    ls -r $pathFrom | ?{$_.LastWriteTime -lt $dateBefore } | Foreach-Object{
        $lenGap = $_.FullName.Length - $pathFromLen - $_.Name.Length - 1;
        $pathCopyTo =  $PathTo + $_.FullName.Substring($pathFromLen, $lenGap);
    
        write-host("copying " + $_.FullName + " to " + $pathCopyTo);
        if(!(Test-path -path $pathCopyTo)){
            write-host("creating folder " + $pathCopyTo );
            mkdir -Pa $pathCopyTo;
        }
        copy-item $_.FullName $pathCopyTo -Force;
    }
    
    exit 0;