115 lines
4.4 KiB
PowerShell
115 lines
4.4 KiB
PowerShell
function Backup-LogFiles {
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<#
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.SYNOPSIS
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Saves old logs into an Archive subfolder.
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#>
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[CmdletBinding()]
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Param(
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[Parameter(Mandatory = $false)]
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[Alias("LogPath")]
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[string]$logDirectory,
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[Parameter(Mandatory = $false)]
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[Alias("CutoffDays")]
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[int]$archiveOlderThanDays = 0,
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[Parameter(Mandatory = $false)]
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[string]$filter = "*.log*"
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)
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$logLead = (Get-LogLeadName)
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if ([string]::IsNullOrEmpty($logDirectory)) {
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$logDirectory = (Get-OrbLogsPath)
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}
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if (!(Test-Path $logDirectory)) {
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Write-Warning "$logLead : Directory `"$logDirectory`" not found. Skipping.";
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return;
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}
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$archivePath = Join-Path $logDirectory "Archive";
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Write-Host "$logLead : Backing up / Archiving logs in `"$logdirectory`"";
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if (!(Test-Path $archivePath)) {
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New-Item $archivePath -ItemType Directory | Out-Null;
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}
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# Determine the cutoff date to archive files.
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$absoluteCutoff = [System.Math]::Abs($archiveOlderThanDays);
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$cutoffDate = (Get-Date).AddDays($absoluteCutoff * -1);
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$cutoffUtc = [System.TimeZoneInfo]::ConvertTimeToUtc($cutoffDate);
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# Remove any potential trailing wildcarded directories
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while ($logDirectory.Substring($logDirectory.get_length() - 2) -eq "\*" ) {
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Write-Host "Found a wildcard. Trimming..."
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$logDirectory = $logDirectory.Substring(0, $logDirectory.get_length() - 2)
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}
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# Tack on a single \* so that Get-ChildItem plays nicely with both the exclude and filter parameters
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$logDirectory = $logDirectory + "\*"
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# Figure out which files need to be archived.
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$logFiles = Get-ChildItem $logDirectory -Exclude *.zip, *.7z -Filter $filter -File | Where-Object { $_.LastWriteTimeUtc -lt $cutoffUtc }
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# Archive each file.
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$szPath = (Get-7ZipPath)
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foreach ($file in $logFiles) {
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Write-Verbose "Archiving $($file.FullName)";
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$archiveZip = $file.LastWriteTimeUtc.ToString("yyyy-MM-dd");
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$archiveZip = "$archiveZip.zip"
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$archiveZip = Join-Path $archivePath $archiveZip
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$archiveExists = Test-Path $archiveZip;
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# Figure out if the file is already in the zip.
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# We have to rename a file, and then add it, to prevent the original file in the zip from being overwritten.
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# This is particularly an issue if we do multiple deploys inside a day, which would overwrite the active log.
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$fileToArchive = $file.FullName;
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$tempPath = $null;
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try {
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if ($archiveExists) {
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# Search files inside the archive.
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$archiveFiles = (& $szPath l -r $archiveZip) | Where-Object { $_ -like "*$file*" -or $_ -like "*$($file.BaseName)_*$($file.Extension)" }
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$fileCount = $archiveFiles.count;
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if ($fileCount -gt 0) {
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Write-Verbose "File name $($file.Name) already exists in the archive `"$archiveZip`" Creating a temporary log file copy & adding it to the archive.";
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# Turns "C:/some/base/path/logname.log" into "C:/some/base/path/logname_2.log"
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$tempFileName = "$($file.BaseName)_$fileCount$($file.Extension)"
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$tempPath = Join-Path $file.Directory $tempFileName;
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Copy-Item -Path $file.FullName -Destination $tempPath
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$fileToArchive = $tempPath;
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}
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}
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try {
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& $szPath a -tzip -sdel -y $archiveZip $fileToArchive;
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} catch {
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Write-Warning $_.Exception;
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}
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# Clean up the original file if there was a pre-existing file in the archive.
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# 7-Zip removes a file when it adds it to an archive.
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if ($tempPath -and (Test-Path $file.FullName)) {
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Write-Verbose "Removing log $($file.FullName) because it was a duplicate filename in the `"$archiveZip`" archive."
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Remove-Item -Path $file.FullName -Force;
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}
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} catch {
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Write-Warning $_.Exception;
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} finally {
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# Remove temporary log files if zipping failed out for any reason.
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if ($tempPath -and (Test-Path $tempPath)) {
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Write-Verbose "Removing temporary log file copy `"$tempPath`"";
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Remove-Item -Path $tempPath -Force;
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}
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}
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}
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Write-Host "$logLead : Backup complete.";
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}
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