CODEWITHSUNDEEP
powershell
The IT Guy
The IT Guy

Reputation: 13

Only run with an option if a variable is true in PowerShell

Sorry, this is difficult to explain. I have a long, piped, etc. command like this:

param (
    [alias("r")]
    [Parameter(Mandatory = $false)]
    [switch]$recurse = $false,
    [...]

$allFiles = Get-ChildItem $folder | Where-Object { $_.CreationTime -ge [DateTime]::Now.AddHours($hoursOld) } |
    ForEach-Object {
[...]

And there is another way to run Get-ChildItem, which is with the -recurse option. I only know how to write the entire command all over again, but with the "-recurse" option, and wrap both ways in an if/else...

Is there a way to include that -recurse after gci only if the -r (switch command line option, alias for $recurse) is $True?

ex:

$allFiles = Get-ChildItem $folder -recurse | Where-Object { $_.CreationTime -ge [DateTime]::Now.AddHours($hoursOld) } |
    ForEach-Object {
[...]

PS C:\PSScripts> $psversiontable

Name                           Value
----                           -----
PSVersion                      4.0
WSManStackVersion              3.0
SerializationVersion           1.1.0.1
CLRVersion                     4.0.30319.42000
BuildVersion                   6.3.9600.18728
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0}
PSRemotingProtocolVersion      2.2

Upvotes: 1

Views: 557

Answers (1)

G42
G42

Reputation: 10019

Switches can be $true or $false. Exclusion is the same as $false, and inclusion is the same as $true. However, you can override this by being explicit:

$allFiles = Get-ChildItem $folder -recurse:$recurse | Where-Object ...

This takes the value of $recurse, and applies it to -recurse. So you have -recurse:$true when $recurse is included, and -recurse:$false when it is not.

Upvotes: 3

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