PowerShell: Backup Directory

BackupDirectory.ps1

Param(
  [Parameter(Mandatory=$True)]
  [string]$directory,
  
  [Parameter(Mandatory=$False)]
  [string]$backupDirectory = "C:\Backups\",
  
  [Parameter(Mandatory=$False)]
  [boolean]$zip = $False,
  
  [Parameter(Mandatory=$False)]
  [string]$fileNameOverride = "",
  
  [Parameter(Mandatory=$False)]
  [boolean]$appendDateTime = $False,
  
  [Parameter(Mandatory=$False)]
  [boolean]$useDatePath = $False
)

# Get the current date/time/
# We will use this for filename generartion and directory path where relevant.
$now = [System.DateTime]::Now

# Ensure that no wildcards are specified within the specifed file.
if($directory.Contains("*"))
{
    Write-Host "Specified source directory cannot contain wildcards: $directory" -ForegroundColor Red 
    exit 1
}

# Ensure that the specified source file actually exists
if(-not(Test-Path $directory -PathType Container))
{
    Write-Host "Specified source directory not found: $directory" -ForegroundColor Red 
    exit 1
}

# Obtain the filename from the path.
# This will be the default name for the file when uploading to Dropbox.
# This may end up being overridden.
$fileName = Split-Path $directory -leaf

# Check if a value for "-fileNameOverride" has been supplied.
# If it has, then we will use this value as the resulting filename when the file is backed up.
if($fileNameOverride.Length -gt 0)
{
    $fileName = $fileNameOverride
}

# Check if the current date/time is to be appended to the filename
if($appendDateTime -eq $True)
{
    $fileDate = $now.ToString("yyyyMMdd-HHmmssfff")
    $fileName = $fileDate + "-" +$fileName
}

# Start building the backup location path
$backupPath = $backupDirectory;

# Check if the relative directory should contain a date structure.
# If it does, append the relevant date folder to the relative directory.
# This will be useful for organising the backups by date, making it easier to locate the relevant backups.
if($useDatePath -eq $True)
{
    $backupPath = $backupPath + "\" + $now.ToString("yyyy") + "\" + $now.ToString("MM-MMMM") + "\" + $now.ToString("dd-dddd")
}

# Fix any issues with path separators
$backupPath = $backupPath.Replace("/", "\").Replace("\\", "\") 

# Output the information
""
"---------------------------------------------"
"Attempting to backup the specified directory"
"---------------------------------------------"
""
"Directory Source  : $directory"
"Backup To         : $backupDirectory"
"Backup Path       : $backupPath"
"File Name         : $fileName"
"Filename Override : $fileNameOverride"
"Append Date?      : $appendDateTime"
"Use Date Path?    : $useDatePath"
""
"---------------------------------------------"
""

if($zip -eq $True)
{
    $SevenZip = "C:\Data\Apps\7zip\7z1700-extra\7za.exe"
    if (test-path $SevenZip)
    {
        $source = $directory
        $target = $backupPath + "/" + $fileName + ".7z"
        $target = $target.Replace("/", "\").Replace("\\", "\") 

        "Source  : $source"
        "Target  : $target"
        ""

        set-alias sz $SevenZip  

        # NOTE:
        # We are not using the -r flag as it didn't work as expcected
        # https://superuser.com/questions/1194710/how-do-i-disable-7-zip-directory-scan-for-directories-which-are-not-meant-to-be

        # 7zip the requested directory
        sz a -mx=9 -tzip "$target" "$source"
        #Write-Host "sz a -mx=9 -tzip -r $target $source"

        Write-Host "7Zip Compression Complete" -ForegroundColor Green
    }
}
else 
{
    $source = $directory
    $target = $backupPath + "/" + $fileName
    $target = $target.Replace("/", "\").Replace("\\", "\")

    "Copy From : $source"
    "Copy To   : $target"

    if(-not(Test-Path $target))
    {
        Copy-Item -Path $source -Destination $target -Recurse -Force
    }
    else
    {
        Write-Host "Copy To location already exsists" -ForegroundColor Red
    }
}