Powershell 文件夹删除脚本中的非终止异常
我编写了一个Powershell脚本,可以定期删除我机器上的文件夹。 算法如下:Powershell 文件夹删除脚本中的非终止异常,powershell,powershell-2.0,Powershell,Powershell 2.0,我编写了一个Powershell脚本,可以定期删除我机器上的文件夹。 算法如下: # folderclean.ps1 # This script will remove each leaf node of a directory, provided that leaf is over # 14 days old. # CONSTANT DECLARATIONS # testing (run on my local machine) $proj_loc = "C:\foo", "C:\bar"
# folderclean.ps1
# This script will remove each leaf node of a directory, provided that leaf is over
# 14 days old.
# CONSTANT DECLARATIONS
# testing (run on my local machine)
$proj_loc = "C:\foo", "C:\bar"
$logpath = "C:\Logs\BuildClean\$(Get-Date -format yyyyMMdd).log"
function Write-ToLogFile {
param ([string]$stringToWrite)
Add-Content $logpath -value $stringToWrite
}
# Function to check if a folder is a leaf folder.
# First, retrieve the directory $item is pointing to
# Then, create a list of children of $item that are folders
# If this list is either empty or null, return $true
# Otherwise, return $false
function Folder-IsLeaf($item) {
$ary = Get-ChildItem $item -force | ?{ $_.PSIsContainer }
if (($ary.length) -eq 0 -or $ary -eq $null) {
return $true
}
return $false
}
# Deletes leaf folders that are older than a certain threshhold.
# Get a list of children of the folder, where each child is a folder itself and
# was created over 14 days ago and the folder is a leaf
# For each of these children, delete them and increment $folderCount
# Get a list of children of the folder, where each child is a folder itself and
# was last modified over 14 days ago and the folder is a leaf
# For each of these children, delete them and increment $folderCount
function Remove-LeafFolders($path) {
$createdCount = 0
$modifiedCount = 0
Write-ToLogFile "Operation started at $(Get-Date -format "dd/MM/yyyy hh:mm:ss.fff")"
Write-ToLogFile "Looking in $proj_loc"
Write-ToLogFile ""
$start = $(Get-Date)
$proj_loc |
Get-ChildItem -recurse -force |
?{
$_.PSIsContainer -and ($_.CreationTime).AddDays(15) -lt $(Get-Date) -and $(Folder-IsLeaf $_.FullName) -eq $true
} | %{
$formattedDate = $($_.CreationTime).ToString("dd/MM/yyyy hh:mm:ss");
Write-ToLogFile "Folder $($_.FullName) is being removed; created: $formattedDate"
Remove-Item $_.FullName -recurse;
$createdCount += 1
}
$end = $(Get-Date)
$elapsed = $end - $start
Write-ToLogFile "Operation completed at $(Get-Date -format "dd/MM/yyyy hh:mm:ss.fff")."
Write-ToLogFile "Folders removed: $createdCount"
Write-ToLogFile "Time elapsed: $(($elapsed).TotalMilliseconds) ms"
Write-ToLogFile "-------------------------------"
}
Remove-LeafFolders($proj_loc)
...
$leafList = $proj_loc |
Get-ChildItem -recurse -force |
?{
$_.PSIsContainer -and ($_.CreationTime).AddDays(15) -lt $(Get-Date) -and $(Folder-IsLeaf $_.FullName) -eq $true
}
Foreach ($folder in $leafList)
{
$formattedDate = $($folder.CreationTime).ToString("dd/MM/yyyy hh:mm:ss");
Write-ToLogFile "Folder $($folder.FullName) is being removed; created: $formattedDate"
Remove-Item $folder.FullName -recurse;
$createdCount += 1
}
...
深入到每个目录结构,找到最低的子文件夹
检查子文件夹的创建日期
如果它已存在14天或更长时间,请将其删除
记录所有内容不是算法的一部分,只是很好的练习
运行时,它完全按照预期运行
。。。但它会引发以下非终止异常:
Get-ChildItem : Could not find a part of the path 'C:\foo\baz'.
At C:\src\CoreDev\Trunk\Tools\BuildClean script\buildclean.ps1:55 char:15
+ Get-ChildItem <<<< -recurse -force |
+ CategoryInfo : ReadError: (C:\foo\baz:String) [Get-ChildItem],
DirectoryNotFoundException
+ FullyQualifiedErrorId : DirIOError,Microsoft.PowerShell.Commands.GetChil
dItemCommand
我认为使用自下而上的方法来完成这种递归删除比使用自上而下的方法更容易,这是GetChildItem默认提供给您的。请尝试以下方法:
$proj_loc |
Get-ChildItem -recurse -force -Name | sort -desc | Get-Item |
? { ....
}
我找到了答案,在查看了答案后,我意识到问题出在管道上。因此,我将代码更改如下:
# folderclean.ps1
# This script will remove each leaf node of a directory, provided that leaf is over
# 14 days old.
# CONSTANT DECLARATIONS
# testing (run on my local machine)
$proj_loc = "C:\foo", "C:\bar"
$logpath = "C:\Logs\BuildClean\$(Get-Date -format yyyyMMdd).log"
function Write-ToLogFile {
param ([string]$stringToWrite)
Add-Content $logpath -value $stringToWrite
}
# Function to check if a folder is a leaf folder.
# First, retrieve the directory $item is pointing to
# Then, create a list of children of $item that are folders
# If this list is either empty or null, return $true
# Otherwise, return $false
function Folder-IsLeaf($item) {
$ary = Get-ChildItem $item -force | ?{ $_.PSIsContainer }
if (($ary.length) -eq 0 -or $ary -eq $null) {
return $true
}
return $false
}
# Deletes leaf folders that are older than a certain threshhold.
# Get a list of children of the folder, where each child is a folder itself and
# was created over 14 days ago and the folder is a leaf
# For each of these children, delete them and increment $folderCount
# Get a list of children of the folder, where each child is a folder itself and
# was last modified over 14 days ago and the folder is a leaf
# For each of these children, delete them and increment $folderCount
function Remove-LeafFolders($path) {
$createdCount = 0
$modifiedCount = 0
Write-ToLogFile "Operation started at $(Get-Date -format "dd/MM/yyyy hh:mm:ss.fff")"
Write-ToLogFile "Looking in $proj_loc"
Write-ToLogFile ""
$start = $(Get-Date)
$proj_loc |
Get-ChildItem -recurse -force |
?{
$_.PSIsContainer -and ($_.CreationTime).AddDays(15) -lt $(Get-Date) -and $(Folder-IsLeaf $_.FullName) -eq $true
} | %{
$formattedDate = $($_.CreationTime).ToString("dd/MM/yyyy hh:mm:ss");
Write-ToLogFile "Folder $($_.FullName) is being removed; created: $formattedDate"
Remove-Item $_.FullName -recurse;
$createdCount += 1
}
$end = $(Get-Date)
$elapsed = $end - $start
Write-ToLogFile "Operation completed at $(Get-Date -format "dd/MM/yyyy hh:mm:ss.fff")."
Write-ToLogFile "Folders removed: $createdCount"
Write-ToLogFile "Time elapsed: $(($elapsed).TotalMilliseconds) ms"
Write-ToLogFile "-------------------------------"
}
Remove-LeafFolders($proj_loc)
...
$leafList = $proj_loc |
Get-ChildItem -recurse -force |
?{
$_.PSIsContainer -and ($_.CreationTime).AddDays(15) -lt $(Get-Date) -and $(Folder-IsLeaf $_.FullName) -eq $true
}
Foreach ($folder in $leafList)
{
$formattedDate = $($folder.CreationTime).ToString("dd/MM/yyyy hh:mm:ss");
Write-ToLogFile "Folder $($folder.FullName) is being removed; created: $formattedDate"
Remove-Item $folder.FullName -recurse;
$createdCount += 1
}
...
我创建了一些本地文件夹,并对它们进行了处理。没有出现例外情况,因此这似乎起到了作用:
Operation started at 10/12/2012 05:16:18.631
Looking in C:\foo C:\bar
Folder C:\foo\baz is being removed; created: 09/01/2010 02:00:00
Folder C:\bar\baz3\recursion is being removed; created: 01/01/2008 01:00:00
Operation completed at 10/12/2012 05:16:18.748.
Folders removed: 2
Time elapsed: 33.0033 ms
-------------------------------
Operation started at 10/12/2012 05:41:59.246
Looking in C:\foo C:\bar
Folder C:\foo\baz2\NewFolder is being removed; created: 10/10/2010 10:10:10
Folder C:\bar\baz3\barbar is being removed; created: 20/11/2012 05:37:38
Operation completed at 10/12/2012 05:41:59.279.
Folders removed: 2
Time elapsed: 21.0021 ms
-------------------------------
我创建了几个文件夹并尝试了这个,替换了。。。。使用我目前拥有的Where对象命令代码。结果是无法找到删除的路径异常。