I've built a script, shown in Figure 1, that creates a few fictional users. The $DebugPreference automatic variable must be set to Inquire, or the -Debug parameter must be passed to the script or function.If this keyword is not included, any Write-Debug lines you may use will simply be ignored. The script or function must be "advanced," which means you must include the keyword. ![]() Write-Debug requires a few flags to be set: It is limited in scope and use, but it pauses a PowerShell script and provides some methods to see what might have gone wrong with the script. Of the two methods, Write-Debug is the little brother to Set-PsBreakpoint. Breakpoints are an excellent way to peek inside a script at a certain point in time to see what's happening.īreakpoints can be created in PowerShell in one of two ways: by using the Write-Debug cmdlet, or by using the Set-PsBreakPoint cmdlet. You can discover the progress of the script up to the breakpoint, review the history of functions called, and a lot more. When a PowerShell script hits a breakpoint, it will pause execution and wait for input.ĭepending on how the breakpoint was created, you get the option to poke around in your script's current running environment. In simplest terms, a breakpoint is a spot in your script that, when executed, will break (pause) the script's execution. One feature is breakpoints, which have been around for a very long time, and are not new to PowerShell. It's time to get down to debugging.Īs a start to tracking down problems in your script, PowerShell provides several debugging features. What went wrong? What's different in your test environment versus your production environment? Why is this beautiful script of yours failing? ![]() Yay! Then a couple days go by and you try your great new script in production-and it bombs miserably in five different places. You've created a complex PowerShell script, executed it, and it works great in your test environment. Windows PowerShell in 24 Hours, Sams Teach Yourself
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