Powershell to compare to Directory Trees?

Just discovered PowerShell. Convenient, since I need it more now than ever
before it seems lately.

Copied a LARGE directory tree across the network. The connection was reset
by peer near the end and I don't know what got left off the boat.

How do I "diff" the two LARGE directory structures and find out which paths
were not copied? If I could then re-copy those paths by script it would be a
bonus, but I won't push my luck.

Local System is XP-Pro SP2
Copying FROM my linux box.

Here's a sample Powershell script

$source="C:\Backup"
$destination="D:\temp\backup"

get-childitem -path $source -recurse | where {!$_.PSIsContainer}
foreach {
$path=$destination+$_.fullname.remove(0,$source.le ngth)

# test if the file already exist on destination direcotry
if(test-path $path -pathtype leaf){

# if the file sizes are not equal copy the file again - overwrite
if($_.length -ne (get-childitem $path).length){
write-host "files $($_.name) length dont match"
copy-item $_.fullname -destination $path
}
} else {
write-host "the file $($_.name) doesn't exist, copy to destination"
copy-item $_.fullname -destination $path -force
}



--
Shay Lev
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Thanks, this is proving very helpful! and gives me a better idea of how
PowerShell Scripting works.

One question I CANNOT find the answer to:

In *INX one can hit <Ctrl+D> or <Ctrl+Z> to suspend a process usually as a
prelude to sending it to the background or killing the process. How do I do
this in PowerShell?



"Shay Levi" wrote:

>
> Here's a sample Powershell script
>
> $source="C:\Backup"
> $destination="D:\temp\backup"
>
> get-childitem -path $source -recurse | where {!$_.PSIsContainer} |
> foreach {
> $path=$destination+$_.fullname.remove(0,$source.le ngth)
>
> # test if the file already exist on destination direcotry
> if(test-path $path -pathtype leaf){
>
> # if the file sizes are not equal copy the file again - overwrite
> if($_.length -ne (get-childitem $path).length){
> write-host "files $($_.name) length dont match"
> copy-item $_.fullname -destination $path
> }
> } else {
> write-host "the file $($_.name) doesn't exist, copy to destination"
> copy-item $_.fullname -destination $path -force
> }
>
> }
>
>
> --
> Shay Levi
> ------------------------------------------------------------------------
> Shay Levi's Profile: http://forums.techarena.in/member.php?userid=35878
> View this thread: http://forums.techarena.in/showthread.php?t=859035
>
> http://forums.techarena.in
>
>

Hi

PowerShell v 2.0 (CTP) introduces the concept of a background job.
There is a workaround for v1.0:
http://jtruher.spaces.live.com/blog/...628D!130.entry


--
Shay Levi
------------------------------------------------------------------------
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View this thread: http://forums.techarena.in/showthread.php?t=859035

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