Fix PowerShell encoding for Windows environment variable names

[vortsghost2025]

Summary

Fixes #3481.

• Emit braced ${env:NAME} assignments for PowerShell environment variables.
• Accept Windows-standard names such as ProgramFiles(x86) and CommonProgramFiles(x86).
• Reject empty names and names containing }.
• Preserve Bash/fish validation and add coverage for ordinary PATH plus Windows names.

Test plan

• go test ./pkg/util/shellutil -count=1
• go test ./pkg/util/shellutil -run 'TestEncodeEnvVarsForPowerShell' -count=1
• PowerShell 7.6.5 runtime validation

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Advanced

Run ID: 63c1345b-ea43-4583-ae81-325f6b67a1fe

📥 Commits

Reviewing files that changed from the base of the PR and between d9fee7c and 77ef052.

📒 Files selected for processing (2)

• pkg/util/shellutil/tokenswap.go
• pkg/util/shellutil/tokenswap_test.go

🚧 Files skipped from review as they are similar to previous changes (2)

• pkg/util/shellutil/tokenswap.go
• pkg/util/shellutil/tokenswap_test.go

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.

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Walkthrough

PowerShell environment variable encoding now accepts Windows-standard names such as ProgramFiles(x86) and PATH. It emits assignments with ${env:NAME} syntax. It rejects empty names and names containing }, a backtick, or =. Table-driven tests cover valid output and rejected names.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to 77ef0

The PowerShell encoding change supports the intended Windows variable names and includes validation coverage for unsupported names.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: fixing PowerShell encoding for Windows environment variable names.
Description check	✅ Passed	The description directly explains the PowerShell encoding changes, validation behavior, affected Windows names, and test plan.
Linked Issues check	✅ Passed	Issue #3481 requires a PowerShell-only environment-variable encoding fix. encodeEnvVarsForPowerShell emits ${env:NAME} = value, accepts names with parentheses such as ProgramFiles(x86), and reje…
Out of Scope Changes check	✅ Passed	The changes remain within issue #3481. They modify PowerShell environment-variable validation and add focused regression tests in pkg/util/shellutil. No unrelated change is evident.

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[chatgpt-codex-connector]

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Reviewed commit: 853897bfc2

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[vortsghost2025]

Addressed the open PowerShell review finding in follow-up commit d9fee7c26babe0c7fc593abc186e7888ef77f7c8. PowerShell environment-variable names containing backticks are now rejected alongside closing braces, and the regression test covers `FOO``. The PR head is updated; GitHub’s CLA and CodeRabbit checks are currently pending.

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Actionable comments posted: 1

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Inline comments:
In `@pkg/util/shellutil/tokenswap.go`:
- Around line 127-132: Update the PowerShell environment-name validation in the
token encoding path to reject names containing “=” in addition to the existing
invalid characters, while preserving support for names such as
ProgramFiles(x86). Anchor the change to the k validation condition before
constructing the ${env:...} assignment.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Advanced

Run ID: f0d07b5f-353b-4744-a7f8-e1f5342d0570

📥 Commits

Reviewing files that changed from the base of the PR and between 853897b and d9fee7c.

📒 Files selected for processing (2)

• pkg/util/shellutil/tokenswap.go
• pkg/util/shellutil/tokenswap_test.go

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.