如果项目尚不存在，则将项目从源复制到目标 [英] Copy items from Source to Destination if they don't already exist

问题描述

我有一个非常基本的 powershell 复制脚本，可以将项目从源文件夹复制到目标文件夹.但是，这移动了太多数据，我想检查文件名是否已经存在，以便可以忽略该文件.我不需要像验证创建日期/校验和等那样复杂.

I have a pretty basic powershell copy script that copies items from a source folder to a destination folder. However this is moving way too much data, and I'd like to check if the filename already exists so that file can be ignored. I don't need this as complex as verifying created date/checksum/etc.

目前是这样的:

Copy-Item source destination -recurse
Copy-Item source2 destination2 -recurse

我想我需要添加 Test-Path cmdlet，但我不确定如何实现它.

I'd imagine I need to add the Test-Path cmdlet, but I'm uncertain how to implement it.

推荐答案

为此，您始终可以从 PowerShell 调用 ROBOCOPY.

You could always call ROBOCOPY from PowerShell for this.

使用/xc(排除已更改)/xn(排除较新)和/xo(排除较旧)标志:

Use the /xc (exclude changed) /xn (exclude newer) and /xo (exclude older) flags:

robocopy /xc /xn /xo source destination 

这只会复制那些不在目标文件夹中的文件.

This will ONLY copy those files that are not in the destination folder.

更多选项输入robocopy/?

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