In my custom powershell provider I want the user to be able to skip the internal call to InitializeDefaultDrives.
The InitializeDefaultDrives method is called when the provider starts. I guess this is when I use the Add-SnapIn cmdlet to load my provider. So it looks like i'm searching for a way to add dynamic parameters to to the Add-SnapIn cmdlet.
I know i can just skip the implementation of InitializeDefaultDrives and have the user use new-PsDrive to add the drive manually if desired. That is not want I want. I want to always create a default drive except in the case where the user wants to skip this.
Thanks!
AFAIK dynamic parameters only work when you control the source code i.e. in your code you can choose to expose a dynamic parameter based on the value of another parameter (like a path). Then your code does something different based on the value of the dynamic parameter. However, you should be able to accomplish what you want via a session preference variable.
$SuppressDriveInit = $true
Add-PSSnapin Acme
If the variable is not definied or is set to false, then go ahead and initialize the drive. It is low tech but should work fine.
Related
This is a question about using PowerShell with Custom Commands (or scheduled tasks) in the Adaxes Active Directory management software by Softerra.
I am trying to accept a parameter from a user when using a custom command, then I need to take that value and modify it for use in a future action of the custom command.
A "for example" use-case would be creating a script that sets a user's out of office, where the custom command takes a target user reference in the out of office message. The first action in the custom command would find the email address of the provided user, then the second action would set the out-of-office with a message telling recipients for immediate assistance to email the provided user's email address. I realize there may be ways to solve this with one PowerShell script, but there are MANY scenarios where it would be beneficial to process provided information with a script action for use with MULTIPLE future actions in the custom command.
I already know how to access parameter values in custom commands for Softerra Adaxes, but I can't figure out how to WRITE to parameter values.
Accessing values:
$context.GetParameterValue('param-Example')
Does anyone know how to write TO parameter values? $context.SetParameterValue() does not work. This would be extremely useful for being able to store and manipulate values between actions in custom commands in Adaxes.
If anyone is looking for something similar, the answer I got from Adaxes support was that there is no means to do this currently with their software.
The only work-around would be writing to a property of the object being modified, then reference that property later.
For instance, writing a value to the extensionAttribute1 property of a user, then referencing that later in the script in a different action.
If anyone comes up with a better solution or Adaxes changes this, please feel free to suggest a better solution!
I'm currently working on a module in PowerShell which uses a standard REST API in the background. For that, I wrote a Connect-Server cmdlet that retrieves an auth key for later calls.
My question is: Is there any best practice regarding sharing the data with other cmdlets? I know I could easily just return it from the Connect function and pass it to the following cmdlet, but that's not what I'm looking for.
Until now, I've been using global variables for that exchange of data. But as I've read in some best practice guidelines you should try not to pollute the global scope.
Other solutions I've seen use Get and Set cmdlets, but I don't think that's the best PowerShell way of doing it.
So are there any other ways of solving that?
The normal way is to return data from one cmdlet and store it either in a variable or forward it to the pipeline. Another way of sharing data might be serializing (ConverTo-Json, ConvertTo-Csv, ...) it to a file (located in e.g. $env:TEMP, or created via New-Temporaryfile), and deserializing it back again in another cmdlet (at cost of DISK I/O). Personally I'm always the result in a variable for lather usage and inject it in the next cmdlet (or use the pipeline).
Using global variables is not the best idea since you don't know on which parameters your cmdlet/function depends on.
So as the guys at PoshCode stated, the best way to do such a thing is using a variable in script scope as this is available for all cmdlets in the module but not visible for users.
We are using an Azure SQL Database sink in a Copy Activity.
The requirement is for us to execute a stored procedure here via the "Pre-Copy Script" property of the Sink. We are using Dynamic Content, passing in a "ProcessName" parameter. As you can see, we have a ProcessName variable, and it is used in a call to #concat() to build the stored procedure string for this Sink property.
However, any time we use the variables collection in Dynamic Content, we get this warning as shown in the image. The warning states:
'variables' is not a recognized function
Is there a way to avoid having this "Warning" in the UI? It works fine, but it looks terrible. It appears everywhere we use variables, not just in this case.
Try using pipeline parameters instead of variables and calling it as explained here: https://learn.microsoft.com/en-us/azure/data-factory/control-flow-expression-language-functions
You are most likely going to have to change your logic to do this. But if it works fine as it is, I wouldn't mind changing logic or code just to stop seeing the warning in the UI.
Hope this helped!
I'm attempting to dynamically use the Microsoft.Web.Administration namespace within a powershell cmdlet.
Is there a way to add a variable into a Namespace.Class declaration.
I'm using the namespace [Microsoft.Web.Administration] and it's class [Microsoft.Web.Administration.ApplicationPool], it has a property under it 'Recycling' that you can access using a GetProperty method.
[Microsoft.Web.Administration.ApplicationPool].GetProperty("Recycling")
If you spit out the PropertyType of the above using this
[Microsoft.Web.Administration.ApplicationPool].GetProperty("Recycling").PropertyType.FullName
You get this result,
Microsoft.Web.Administration.ApplicationPoolRecycling
which is another class. I now want to access this class dynamically within the cmdlet. How do access this class from within the code, I want the code to dynamically discover the new class of the object and then access that class. But I can't find a way to accomplish this.
Psuedocode for what I'm trying
[System.Reflection.Assembly]::LoadFrom( "C:\windows\system32\inetsrv\Microsoft.Web.Administration.dll" )
$appPoolProperty = [Microsoft.Web.Administration.ApplicationPool].GetProperty($Property)
$subClassName = $appPoolProperty.PropertyType.FullName
#This is the step I'm lost on
$subClass = New-Object $subClassName
So I'm not sure if there's a way to have a TypeName for an object put in as a string value and I can't seem to find a way to cast the variable as anything else. Sorry if this is remedial, I'm a basement grown coder and just learn things as I go.
EDIT: As requested by Mathias below in the comments, an overview of what I'm trying to achieve.
I have a script that automates the configuration of many IIS components. At this time I'm attempting to add validation to the cmdlet Set-AppPoolConfiguration that I've created that allows a configuration to be fed into the cmdlet that configures an AppPool (this is used to deploy websites/weapplications throughout a distributed web environment). Utilizing the details inside the Microsoft.Web.Administration I'm able to get enum values, as well as types of the many configuration components of an AppPool. This is saving me time to where I don't have to hard code in the data types and can just dynamically discover them and do validation on the values when the specific configuration element is chosen.
For example. If an AppPool Recycle schedule is need to be configured, I need to validate it against a TimeSpan data type. If it is not a TimeSpan data type issues will arise when being added to the ScheduleCollection. So I'm looking to validate the value provided before attempting to add it.
Since there are many AppPool configuration elements, I don't want to have to create a massive switch or if/elseif chain that checks each configuration element and statically dictate what data type it is for validation. I want the class itself to dynamically provide this information to simplify the code.
I can get the majority of these data types by simply accessing the property chain within the namespace. For example, if you want to know what type is required for the QueueLength, use this:
[Microsoft.Web.Administration.ApplicationPool].GetProperty("QueueLength").PropertyType.Name
And you'll get Int64.
It's also extremely useful for getting enums.
[Microsoft.Web.Administration.ApplicationPool].GetProperty("ManagedPipelineMode").PropertyType.GetEnumNames()
However attempting this with Schedule and you run into a small issue as it returns ScheduleCollection. This is true of any of the configuration elements that are part of a collection.
[Microsoft.Web.Administration.ApplicationPool].GetProperty("Recycling").PropertyType.GetProperty('PeriodicRestart').PropertyType.GetProperty('Schedule').PropertyType.Name
However the knowledge that the schedule item inside the ScheduleCollection is only accessible from within the Schedule class. My code currently checks to see if it is a collection, and then if it is, it is attempting to access that collection/class and get the information that is required. To find out that schedule is a TimeSpan you have to access it's specific class instance:
[Microsoft.Web.Administration.Schedule].GetProperty('Time').PropertyType.Name
Now AppPools are simple, there's only a single collection group that is normally edited, so hard coding in that if you're attempting to set a new recycle schedule it will be a TimeSpan isn't that big of a deal, however when we move over to WebSite/WebApplication configurations, it becomes more tedious to statically declare data types for each configuration element that is part of a collection, and becomes more useful to try and discover these dynamically based on the configuration element selected.
This was my initial approach, I just included the above for clarity. I'm going to step back and take another look at how to attack this as this does not appear to be as easy as I had hoped, I'll post my solution here.
You can retrieve the constructor from the type literal and invoke it like so:
$type = [Microsoft.Web.Administration.ApplicationPoolRecycling]
$ctor = $type.GetConstructor('NonPublic,Instance',$null,#(),$null)
$appPoolRecyclingInstance = $ctor.Invoke($null)
Though there may be a way to do the above, in order to complete the updates to my cmdlet and proceed forward with my project I went a hybrid route.
The reason why I started exploring the [Microsoft.Web.Administration] namespace was that it provided information on the data types where the typical way I was manipulating IIS settings failed using Get/Set/Add-WebConfigurationProperty.
The specific failure is in reporting back valid data types for Enums. Take for instance ProcessModel.IdentityTypes. There is a set of valid entries for an IdentityType. However the following doesn't provide you with those valid types, so you either have to create static instances of them inside your cmdlet, or some other external data source, whereas I wanted Microsoft to provide them either through IIS itself, or through the classes attached to these configuration elements so the cmdlet would need minimal updating as IIS versions/configuration elements change.
This code returns Boolean
(Get-WebConfigurationProperty -pspath 'MACHINE/WEBROOT/APPHOST' -filter "system.applicationHost/applicationPools/add[#name='$AppPool']" -name "AutoStart").Value.GetType().Name
However, this code returns string, which is true, but I needed to know that it is an enum and I needed to know the proper values.
(Get-WebConfigurationProperty -pspath 'MACHINE/WEBROOT/APPHOST' -filter "system.applicationHost/applicationPools/add[#name='$AppPool']" -name "processModel").identityType.GetType().Name
Using a mix of both the Namespace and the traditional Get-WebConfigurationProperty commands I can successfully now test for data types, as well as gather proper values for enums dynamically in code. If there is interest I can post the entire validation code here that I'm using for this cmdlet.
I'm trying to implement API of our product using Powershell. E.g., I'd like to create a function Remove-OurProductEntity. This function should have both -ById and -ByFullPath parameters to know which entity to delete. They shouldn't be both mandatory, but only one of them.
If user specified one of them in the command line, the second mustn't appear in autocompletion and Powershell shouldn't ask user to define the second. Moreover, if user specified both, function should ask to define the only one.
Is it possible to be done in Powershell? Or I should handle all the logic inside the function?
Powershell has really COOL language, and guess, something similar should be.
Parameter sets are your friend.
http://blogs.msdn.com/b/powershell/archive/2008/12/23/powershell-v2-parametersets.aspx