PowerShell Script for performing hotcopy Subversion backup and archiving.

PsSvnBackup.ps1

# -------------------------------------------------------------------------------------------------
# SETTINGS
# -------------------------------------------------------------------------------------------------
$REPO_PATH = "X:\SVNREPOS"
$TEMP_BACKUP_PATH = "X:\SVNREPOS-BACKUP"
$PERM_BACKUP_PATH = "X:\SVN-BACKUPS"
$SVNADMIN_EXE_PATH = "C:\Program Files (x86)\VisualSVN Server\bin\svnadmin.exe"
$7ZA_EXE_PATH = "X:\SVN-BACKUPS\7za.exe"
$DAYS_TO_KEEP_BACKUPS = 14

# -------------------------------------------------------------------------------------------------
# REMOVE FILES IN TEMPORARY BACKUP LOCATION IF THEY EXIST
# -------------------------------------------------------------------------------------------------
if ([IO.Directory]::Exists($TEMP_BACKUP_PATH)) {
    Remove-Item $TEMP_BACKUP_PATH -Recurse -Force
}

mkdir $TEMP_BACKUP_PATH | Out-Null

# -------------------------------------------------------------------------------------------------
# HOT COPY REPOSITORY TO TEMPORARY LOCATION
# -------------------------------------------------------------------------------------------------
Write-Output "Hot Copy $REPO_PATH"

& $SVNADMIN_EXE_PATH hotcopy $REPO_PATH $TEMP_BACKUP_PATH
    
if ($lastExitCode -ne 0) {
    throw "Error: failed to 'svnadmin hotcopy' $srcDir to $destDir"
}

# -------------------------------------------------------------------------------------------------
# ARCHIVE BACKUP TO PERMINATE LOCATION
# -------------------------------------------------------------------------------------------------
$ARCHIVE_NAME = [string]::format("{0}.7z", (Get-Date -format yyyyMMddhhmm))
$ARCHIVE_PATH = [IO.Path]::Combine($PERM_BACKUP_PATH, $ARCHIVE_NAME)
& $7ZA_EXE_PATH a $ARCHIVE_PATH $TEMP_BACKUP_PATH\* -r

if ($LastExitCode -ne 0) {
    throw "Error: failed to compress $TEMP_BACKUP_PATH\* using 7-zip"
}

# -------------------------------------------------------------------------------------------------
# REMOVE OLD ARCHIVES
# -------------------------------------------------------------------------------------------------
$DATE_LIMIT = (Get-Date).AddDays(-1 * $DAYS_TO_KEEP_BACKUPS)
$ARCHIVES = [IO.Path]::Combine($PERM_BACKUP_PATH, "*.7z")

# Delete files older than the $DATE_LIMIT.
Get-ChildItem -Path $ARCHIVES -Recurse -Force | Where-Object { !$_.PSIsContainer -and $_.CreationTime -lt $DATE_LIMIT } | Remove-Item -Force