PowerShell+ 2019 - Doctor, Don't Defenestrate: What to Do with Legacy Scripts by Michael Lombardi

Legacy script is in every organization and belongs to every team. We've all got production critical services that rely on one or more solutions we put in place long ago. We wrote those solutions, unsurprisingly, to solve problems - and they did, or they wouldn't still be in use. That means legacy code is valuable - and valuable investments shouldn't just be tossed out the window without a second thought. This talk will cover how you can get your legacy code under control by evaluating, documenting, and adding tests to it - and how doing so will enable you to begin to update and replace your legacy scripts safely and more quickly than before. You'll learn about: - Inline Documentation - Reference Documentation - Characterization Tests - Unit Tests - Concept Documentation - Source Control Practices We'll use an example legacy script to dissect at each stage of the process, showing how you can go about getting your legacy code under control - and how you can use these same practices on your new code to save yourself the future work. PowerShell Summit videos are recorded on a "best effort" basis. We use a room mic to capture as much room audio as possible, with an emphasis on capturing the speaker. Our recordings are made in a way that minimizes overhead for our speakers and interruptions to our live audience. These recordings are meant to preserve the presentations' information for posterity, and are not intended to be a substitute for attending the Summit in person. These recordings are not intended as professional video training products. We hope you find these videos useful - the equipment used to record these was purchased using generous donations from members of the PowerShell community.