fix(build): rerun when resource dirs change

[OlympusLedgerOrg]

Summary

• Track resource directories and glob base directories while iterating configured resources.
• Emit cargo:rerun-if-changed for those directories so adding or removing resource files reruns the build script.
• Add a regression test and covector change file.

Validation

• cargo fmt --all -- --check
• cargo test -p tauri-utils resources::tests
• cargo check -p tauri-build
• cargo clippy -p tauri-utils -p tauri-build --all-targets --all-features -- -D warnings
• Manual e2e repro: after a clean no-op build was Fresh, adding files under both
  esources and glob-assets/* reran the build script and copied the new files into arget/debug resources.

Summary by CodeRabbit

• Bug Fixes
  • Fixed resource handling so changes to files within configured resource directories are detected automatically.
  • Added support for rebuilding and re-copying resources when files are added, removed, or modified.
  • Improved rebuild detection for resources specified through directory paths and wildcard patterns.
• Tests
  • Added coverage to verify resource directories are monitored correctly without unnecessarily watching individual files.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: adc67559-13b9-4eb3-b612-a7c2888d22c5

📥 Commits

Reviewing files that changed from the base of the PR and between 1afd9bd and 732dcbe.

📒 Files selected for processing (3)

• .changes/fix-copy-new-resource-files.md
• crates/tauri-build/src/lib.rs
• crates/tauri-utils/src/resources.rs

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📝 Walkthrough

Walkthrough

Resource iteration now records relevant directories, and copy_resources emits Cargo rebuild directives for them so changes to resource contents trigger resource copying.

Changes

Resource Change Watching

Layer / File(s)	Summary
Track resource directories crates/tauri-utils/src/resources.rs	ResourcePathsIter records glob bases and walked directories, exposes the tracked paths, and tests the resulting watch list.
Emit Cargo watch directives crates/tauri-build/src/lib.rs, .changes/fix-copy-new-resource-files.md	copy_resources emits cargo:rerun-if-changed for tracked directories, and the change entry records the dependency and build behavior updates.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Sequence Diagram(s)

sequenceDiagram
  participant copy_resources
  participant ResourcePathsIter
  participant Cargo
  copy_resources->>ResourcePathsIter: iterate resource paths
  ResourcePathsIter-->>copy_resources: return tracked directories
  copy_resources->>Cargo: emit cargo:rerun-if-changed directives

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🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: build scripts now rerun when resource directories change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-resource-rerun-if-changed

⚔️ Resolve merge conflicts

• Resolve merge conflict in branch fix-resource-rerun-if-changed

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