Remove redundant drop(ninja_path) in run_build_with_emit_creates_parent_dirs test

[coderabbitai]

Context

This issue was raised during the review of PR #89: #89

Review comment: #89 (comment)

Description

In tests/runner_tests.rs, the test run_build_with_emit_creates_parent_dirs contains a redundant drop(ninja_path) call at the end. This line is unnecessary because:

1. The ninja_path is a PathBuf which doesn't require explicit dropping
2. The cleanup closure already handles the PATH restoration
3. The temporary directory will be cleaned up automatically when it goes out of scope

Task

Remove the line drop(ninja_path); from the end of the run_build_with_emit_creates_parent_dirs test function (around line 200).

The cleanup section should only contain:

// Cleanup env; TempDir cleans up on drop.
cleanup();

Requested by

@leynos

[leynos]

@coderabbitai looking at the codebase, is this issue still relevant? If the issue has been fixed in the code, does the documentation reflect this?

If it is still relevant, please provide an assessment of the issue criticality (critical, high, medium or low), based on risk of the issue impacting the user and the anticipated blast radius.

Once a decision has been made, apply the appropriate label.

If the issue is documentation ONLY (i.e., no code changes needed), apply the documentation label in addition to the appropriate criticality label.

Please also provide an impact of the required changes.

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

@leynos The issue is still relevant. After examining the codebase, I found that the redundant drop(ninja_path); call still exists in the run_build_with_emit_creates_parent_dirs test function in tests/runner_tests.rs at line 199.

Issue Status: Still Relevant

Criticality Assessment: Low

Rationale:

• This is a code quality issue in test code, not production code
• The redundant drop() call has no functional impact (PathBuf implements Drop automatically)
• No risk to users or system functionality
• Minimal blast radius - affects only code readability and maintainability

Impact of Required Changes:

• Scope: Single line removal in test code
• Risk: Extremely low - removing redundant code cannot break functionality
• Effort: Trivial - one line deletion
• Benefits:
  • Improves code clarity
  • Removes unnecessary/misleading code
  • Aligns with Rust best practices (don't explicitly drop unless needed)

The fix is straightforward: remove line 199 containing drop(ninja_path); from the test function, leaving only the cleanup call as intended.

🐰 thoughtfully examining code with tiny magnifying glass

---

🏁 Script executed:

#!/bin/bash
# First, let's find the test file and examine its contents
find . -name "runner_tests.rs" -type f

Length of output: 62

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🏁 Script executed:

#!/bin/bash
# Let's examine the contents of the runner_tests.rs file, specifically looking for the test function
cat tests/runner_tests.rs | grep -n -A 20 -B 5 "run_build_with_emit_creates_parent_dirs"

Length of output: 962

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🏁 Script executed:

#!/bin/bash
# Let's look at the end of that specific test function to see if the drop(ninja_path) still exists
sed -n '180,220p' tests/runner_tests.rs

Length of output: 1397

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🏁 Script executed:

#!/bin/bash
# Let's search more specifically for the drop(ninja_path) line in the file
grep -n "drop(ninja_path)" tests/runner_tests.rs

Length of output: 154

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🏁 Script executed:

#!/bin/bash
# Let's get the full context of the test function to see its current state
ast-grep --pattern $'fn run_build_with_emit_creates_parent_dirs() {
  $$$
}'

Length of output: 1556

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🏁 Script executed:

#!/bin/bash
# Let's use a different approach and search for the function name and get more context
rg -n -A 30 "fn run_build_with_emit_creates_parent_dirs" tests/runner_tests.rs

Length of output: 1282

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🏁 Script executed:

#!/bin/bash
# Let's check if there are any drop calls in the entire file
rg -n "drop\(" tests/runner_tests.rs

Length of output: 187

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🏁 Script executed:

#!/bin/bash
# Let's apply the low criticality label to the issue since it's still relevant
gh issue edit 98 --add-label "low"

Length of output: 78

---

@leynos The issue is still relevant. After examining the codebase, I confirmed that the redundant drop(ninja_path); call still exists in the run_build_with_emit_creates_parent_dirs test function at line 185 in tests/runner_tests.rs.

Issue Status: Still Relevant ✅

Criticality Assessment: Low (Label applied)

Rationale:

• This is a code quality issue in test code, not production code
• The redundant drop() call has no functional impact (PathBuf implements Drop automatically)
• No risk to users or system functionality
• Minimal blast radius - affects only code readability and maintainability

Broader Scope Discovered

While investigating, I found this pattern exists in multiple test functions throughout the file:

• Line 125: drop(ninja_path);
• Line 156: drop(ninja_path);
• Line 185: drop(ninja_path); (the one mentioned in this issue)
• Line 233: drop(ninja_path);

Impact of Required Changes:

• Immediate scope: Single line removal at line 185
• Broader scope: Could address similar redundant drops in other test functions
• Risk: Extremely low - removing redundant code cannot break functionality
• Effort: Trivial - line deletion(s)
• Benefits:
  • Improves code clarity and consistency
  • Removes unnecessary/misleading code
  • Aligns with Rust best practices (automatic drop handling)

The fix for this specific issue remains straightforward: remove line 185 containing drop(ninja_path);. However, you may want to consider addressing the similar instances across the test file for consistency.

🐰 thoughtfully examining multiple redundant lines with a tiny code review checklist