Improve dapr init experience on Windows machines running WSL

[WhitWaldo]

Description

Implementing additional functionality for dapr init when running in elevated prompts on Windows to address port-busy errors for Dapr scheduler when WSL is installed on the system. If not elevated and the error is encountered on Windows, the output suggests launching as an elevated process and retrying (and why).

Otherwise, if the user is running the CLI in Windows, using an elevated command prompt and runs dapr init and has WSL2 installed, this will run as normal, but before it starts running the scheduler, it will:

• Shut down the WSL instance
• Stop the Windows NAT service

It will then proceed to run the Dapr Scheduler service as normal and this is expected to work this time. Then, it will restart WSL and start the Windows NAT service again, and complete as normal.

This was authored in Claude, but I gave it a manual pass to fix several things that just didn't look right and validated that tests appear comprehensive and pass locally.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #1630

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

❌ Patch coverage is 29.78723% with 33 lines in your changes missing coverage. Please review.
✅ Project coverage is 15.75%. Comparing base (1c7e715) to head (84a8e70).
⚠️ Report is 13 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/standalone/standalone.go	19.51%	33 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1641      +/-   ##
==========================================
+ Coverage   15.15%   15.75%   +0.60%     
==========================================
  Files          64       65       +1     
  Lines        7191     7247      +56     
==========================================
+ Hits         1090     1142      +52     
- Misses       6016     6017       +1     
- Partials       85       88       +3     

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[Copilot]

Pull request overview

This PR improves the dapr init experience on Windows by detecting and remediating a common scheduler port-binding failure associated with WSL2/WinNAT, including tailored guidance when the CLI is not running elevated.

Changes:

• Added Windows-specific helpers to detect elevation/WSL availability and to restart WSL/WinNAT as a remediation step.
• Added a pre-flight port availability check for scheduler ports on non-elevated Windows when WSL is present, emitting guidance to rerun elevated.
• Added unit tests for the new port-check helper logic and OS-specific stubs.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pkg/standalone/standalone.go	Adds scheduler port checks and Windows elevated remediation (WSL shutdown + WinNAT stop/start) around scheduler container startup.
pkg/standalone/wsl_windows.go	Implements Windows elevation detection and WSL/WinNAT control helpers.
pkg/standalone/wsl_nowindows.go	Adds non-Windows no-op stubs for the Windows-specific helpers.
pkg/standalone/wsl_windows_test.go	Adds Windows-only tests ensuring the Windows helper functions are callable/non-blocking.
pkg/standalone/wsl_nowindows_test.go	Adds non-Windows tests verifying the stubbed helper behavior.
pkg/standalone/wsl_test.go	Adds cross-platform unit tests for port-check helper behavior.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

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