Fix root in nix config breaking caching

[Dreamsorcerer]

No description provided.

[greptile-apps]

Greptile Summary

The native-module cache manifest now avoids treating a fileset source root as a standalone input while continuing to hash each module’s build directory. The checked mixed-root case remains covered because the module directory’s Git tree hash includes the nested input.

Confidence Score: 5/5

Safe to merge: the checked fileset-root scenario still changes the cache input when a nested real input changes.

The reported concern was exercised against both implementations. Although the changed parser omits the nested path from its intermediate collection, manifest normalization retains the enclosing module directory, whose Git tree hash covers that path.

Files Needing Attention: No files need follow-up changes.

T-Rex Logs

What T-Rex did

• Ran a standalone tracked-Git fixture against the parent and changed implementations to compare how path entries are collected.
• The fixture placed a valid fileset.toSource root and a separate root = ./real-input in the same flake.
• The changed parser omitted module/real-input from its intermediate collection, while the manifest retained module as the path entry and its Git tree hash covers changes below module/real-input.
• The parent implementation retained module as the effective manifest path entry.
• Hash-path validation shows the changed code omits the real-input token while the parent includes it, so the effective hash input remains module and final manifest path entries are ['module'] for both revisions.

_{Ran code and verified through T-Rex}

_{Reviews (1): Last reviewed commit: "Fix root in nix config breaking caching" | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

@@            Coverage Diff             @@
##             main    #3976      +/-   ##
==========================================
- Coverage   77.91%   77.91%   -0.01%     
==========================================
  Files        1398     1398              
  Lines      132268   132274       +6     
  Branches    11487    11489       +2     
==========================================
- Hits       103061   103058       -3     
- Misses      25943    25950       +7     
- Partials     3264     3266       +2     

Components	Coverage Δ
Tests	94.72% <100.00%> (-0.02%)	⬇️

Flag	Coverage Δ
OS-ubuntu-24.04-arm	74.25% <100.00%> (-0.01%)	⬇️
OS-ubuntu-latest	74.75% <100.00%> (-0.01%)	⬇️
Py-3.10	74.75% <100.00%> (-0.01%)	⬇️
Py-3.11	74.75% <100.00%> (-0.01%)	⬇️
Py-3.12	74.75% <100.00%> (+<0.01%)	⬆️
Py-3.13	74.75% <100.00%> (-0.01%)	⬇️
Py-3.14	74.75% <100.00%> (-0.01%)	⬇️
Py-3.14t	74.75% <100.00%> (+<0.01%)	⬆️
SelfHosted-Large	30.71% <14.28%> (-0.01%)	⬇️
SelfHosted-Linux	35.77% <14.28%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
dimos/core/test_build_native_modules.py	90.41% <100.00%> (+0.35%)	⬆️

... and 3 files with indirect coverage changes

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