Validate DEV_USER_EXTENSIONS_PATH in utility function to prevent activation failures

[Copilot]

• Create separate validation function following DOT principle
  • Extract validation logic from addDevEnvVariables() into validateDevEnvVariables()
  • Keep addDevEnvVariables() focused on loading env file
  • Call validateDevEnvVariables() after loading
• Remove unnecessary comment from extensionData.ts line 98
• Reorder functions - addDevEnvVariables() now comes before validateDevEnvVariables()
• Run code review - No issues found
• Run security checks - No vulnerabilities found

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[yCodeTech]

A lot of this validation and errors should probably go in the util function that adds it to the env in the first place.

[Copilot]

A lot of this validation and errors should probably go in the util function that adds it to the env in the first place.

Moved the validation logic from extensionData.ts to the addDevEnvVariables() utility function in utils.ts. The environment variable is now validated and sanitized when it's loaded (early in extension activation), rather than when it's used. Invalid paths are removed from process.env with error logging, ensuring the value is either valid or undefined when accessed later.

Addressed in commit 88864fe.

[yCodeTech]

Hmm. Maybe it should be in a new util function for validation? Because of the DOT principle.

[Copilot]

Hmm. Maybe it should be in a new util function for validation? Because of the DOT principle.

Created a separate validateDevEnvVariables() function following the DOT principle. The addDevEnvVariables() function now focuses solely on loading the .env file, while validateDevEnvVariables() handles validation and sanitization. This keeps each function responsible for one thing.

Addressed in commit 64f50b5.

[yCodeTech]

Why is this above the addDevEnvVariables? Please move it below for better organisation.

[Copilot]

Why is this above the addDevEnvVariables? Please move it below for better organisation.

Moved validateDevEnvVariables() below addDevEnvVariables() for better organization.

Addressed in commit 25e5e94.

[yCodeTech]

Superseded by #24.