Production-Quality Powershell Functions

Missy Januszko has some tips on turning those Powershell scripts into reusable functions:

Breaking down your code may mean chopping apart your lengthy script into smaller pieces. As a best practice, a function should do only one thing. A retrieval cmdlet retrieves information and sends that information to the pipeline. Conversely, a functional cmdlet performs an act but not a retrieval act. It may take input from another cmdlet and act upon that input. It may or may not send output information to the pipeline. Lastly, output cmdlets format output in a desired display. As a result, this will allow us to use the pipeline more effectively to pass parameters between functions. In the above example, most of the function is a retrieval function. The exception is that it formats the output into a table with the last line. I will remove that line and let the user of the function decide how they want it formatted.

As a friendly warning to operations folks who are using more and more Powershell, when you do it right, you end up being a developer.  But we can keep that a secret, just between you and me.

Related Posts

Using dbatools Instead of RDP

Garry Bargsley shows how we can use dbatools to do some of the things which we might naturally do with Remote Desktop: So you hear this spread across the Twitterverse and Blogosphere. You should not RDP your SQL Servers to do administrative work. My nature has always been to troubleshoot issues from the server in […]

Read More

File Sizes in dbatools

Chrissy LeMaire gives us several ways to format file sizes with dbatools: Within dbatools, you may notice file sizes are pretty and human-readable. That was some C# based magic created by Microsoft PFE and creator of PSFramework, Fred Weinmann. In the background, SQL Server often gives us different types of numbers to represent file sizes. Sometimes it’s […]

Read More

Categories

June 2017
MTWTFSS
« May Jul »
 1234
567891011
12131415161718
19202122232425
2627282930