マシン上のフォルダーを定期的に削除するPowershellスクリプトを作成しました。アルゴリズムは次のとおりです。
- 各ディレクトリ構造を最下位のサブフォルダにドリルダウンします
- サブフォルダの作成日を確認してください
- 14日以上経過している場合は、削除してください
- すべてをログに記録します（アルゴリズムの一部ではなく、適切な方法です）
実行中は、期待どおりに動作します...
...次の、終了しない例外をスローする場合を除きます。
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
なぜこうなった？さらに重要なのは、どうすればそれを削除でき、問題が発生するのでしょうか？
スクリプトは次のとおりです。
# 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)