microsoft/PowerToys

Remove duplicates from PATH environment variables

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#40,402 opened on Jul 4, 2025

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Help WantedIdea-EnhancementProduct-Environment Variables

Description

Description of the new feature / enhancement

When using the Environment Variables PowerToy recently it made editing the path an absolute breeze. However I noticed that a utility that I use, adds itself to the PATH environment variable every time it updates. I found myself looking for a "remove duplicates" option, but it was missing.

When using "Edit Variable" on a PATH, there is a little "..." menu item, which pops up some options, "Move Up, Move Down, Delete, Insert Before, Insert After", adding "Remove Duplicate" to this list would be very handy.

Scenario when this would be used?

When working with a PATH, and using "Edit Variable". It would keep the first occurring instance the then remove all subsequent, identical paths. Doing this manually is error prone and something that the utility could easily do for me.

Supporting information

No response

Contributor guide

Tech stack
csharpshell
Domain
desktoptooling
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
C#PowerToys development environment
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80
Research direction
The feature request suggests adding a 'Remove Duplicate' option to the existing 'Edit Variable' dialog for PATH. To implement this, examine how the current 'Move Up', 'Move Down', etc. options are added in the Environment Variables UI. Look for files related to the EnvironmentVariables module in the PowerToys repository, likely under `src/modules/environmentvariables/`. The context menu is probably defined in a XAML file or C# code. Implementing the feature would involve adding a new menu item, detecting duplicates (e.g., using a HashSet), and removing all but the first occurrence. Ensure the modification is done on the collection bound to the UI without breaking other functionality.