如何复制文件然后将目标路径保存到 CSV

Question

我正在尝试将一批文件（文件名以 6 位开头的文件）从临时文件夹复制到永久位置，不包括新位置中已存在的文件。

复制完成后，我想将复制文件的文件名和新路径导出为 CSV。

获取旧文件位置并导出为 CSV 非常容易，我只是不太确定如何获取新文件位置。

我的脚本如下所示：

# Prompt for file origin
$file_location = Read-Host -Prompt "Where do you want your files to come from?"
# Prompt for file destination 
$file_destination = Read-Host -Prompt "Where do you want your files to go? `n(They won't be copied if they're already there)"

# Save contents of file destination - used to check for duplicates
$dest_contents = Get-ChildItem $file_destination

<# For all of the files of interest (those whose names begin with 6 digits) in $file_location, 
     determine whether that filename already exists in the target directory ($file_destination)
     If it doesn't, copy the file to the destination
     Then save the filename and the new** filepath to a CSV #>

Get-ChildItem -Path $file_location |      
    Where-Object { $_.Name -match '^\d{6}' -And !($dest_contents -Match $_.Name ) } |
    Copy-Item -Destination $file_destination -PassThru | 
    Select-Object -Property Name, FullName |             # **Note: This saves the old filepath, not the new one
    Export-CSV -Path "$file_location\files_copied.csv" -NoClobber

Answer 1

您可以通过对代码进行一些更改来做到这一点

# Prompt for file origin
$file_location = Read-Host -Prompt "Where do you want your files to come from?"
# Prompt for file destination 
$file_destination = Read-Host -Prompt "Where do you want your files to go? `n(They won't be copied if they're already there)"

# Save contents of file destination - used to check for duplicates
$dest_contents = Get-ChildItem $file_destination | Select-Object -ExpandProperty Name

<# For all of the files of interest (those whose names begin with 6 digits) in $file_location, 
     determine whether that filename already exists in the target directory ($file_destination)
     If it doesn't, copy the file to the destination
     Then save the filename and the new** filepath to a CSV #>

Get-ChildItem -Path $file_location |      
    Where-Object { $_.Name -match '^\d{6}' -and ($dest_contents -notcontains $_.Name ) } |
    ForEach-Object { 
        Copy-Item -Path $_.FullName -Destination $file_destination 
        # emit a PSObject storing the Name and (destination) FullName of the file that has been copied
        # This will be used to generate the output in the 'files_copied.csv'
        New-Object -TypeName PSObject -Property ([ordered]@{ Name = $_.Name; FullName = (Join-Path $file_destination $_.Name)})
    } | 
    Export-CSV -Path "$file_location\files_copied.csv" -NoTypeInformation -Force

请注意，我只收集目标路径中已有文件的名称，而不是 fileInfo 对象。这使它变得更“精简”，因为收集的唯一原因是有一组文件名进行比较。

现在，'files_copied.csv' 有一个固定的名称，我个人认为最好通过添加当前日期来使其更通用，例如

Export-CSV -Path ("{0}\files_copied_{1}.csv" -f $file_location, (Get-Date).ToString("yyyy-MM-dd")) -NoTypeInformation -Force 

附：我在这里使用[ordered]，因此输出将始终具有相同顺序的属性。但是，这需要 PowerShell v3 或更高版本。 另外，如果您需要确保代码只复制文件而不是目录，我建议查看Get-ChildItem 命令上的-File 或-Attributes 开关。如果您的 PowerShell 版本是 2.0，则可以使用 Where-Object { !$_.PSIsContainer } 构造仅过滤掉文件。

Answer 2

• 在迭代源文件时，我会使用不同的方法测试目标是否存在。

• 要附加到现有的 csv（日志）文件，您需要删除新文件的标题。

• 由于 Get-ChildItem 允许范围 [0-9]，您可以直接选择前导数字

---

## Q:\Test\2018\08\08\SO_51738853.ps1
# Prompt for file origin
$SrcDir = Read-Host -Prompt "Where do you want your files to come from?"

# Prompt for file destination 
$DstDir = Read-Host -Prompt "Where do you want your files to go? `n(They won't be copied if they're already there)"

$SrcFiles = Join-Path (Get-Item $SrcDir).Fullname [0-9][0-9][0-9][0-9][0-9][0-9]*

$CopiedFiles = ForEach ($SrcFile in (Get-ChildItem -Path $SrcFiles)){
    $DstFile = Join-Path $DstDir $SrcFile.Name
    If (!(Test-Path $DstFile)){
        $SrcFile | Copy-Item  -Destination $DstFile -PassThru | 
            Select-Object -Property Name, FullName
    }
}    

# Check if log file exists, if yes append, otherwise export.
$LogFile = Join-Path $SrcDir "files_copied.csv"
If ($CopiedFiles){
    If (!(Test-Path $LogFile)){
        Export-CSV -Path $LogFile -InputObject $CopiedFiles -NoTypeInformation
    } else {
        # We need to remove the Header appending to the present csv
        $CopiedFiles | ConvertTo-Csv -NoType | Select-Object -Skip 1 | Add-Content -Path $LogFile
    }
}