daily-file-diet: replace expensive find | wc -l with git ls-tree

[Copilot]

find ... -exec wc -l {} \; spawns one wc process per file, scans all file types, and requires manual exclusion of generated directories — slow enough to hit workflow timeouts on larger repos.

Changes

• tools.bash allowlist — Replaced 9 find-based entries with git ls-tree command patterns:

  • git ls-tree -r --name-only HEAD / git ls-tree -r -l --full-name HEAD
  • Pipeline patterns: grep -E * | grep -vE * | xargs wc -l

• Analysis Process example — Replaced the find | wc block with:

  git ls-tree -r --name-only HEAD \
    | grep -E '\.(go|py|ts|tsx|js|jsx|rb|java|rs|cs|cpp|c|h|hpp)$' \
    | grep -vE '(_test\.go|\.test\.(ts|js)|\.spec\.(ts|js)|test_[^/]*\.py|[^/]*_test\.py)$' \
    | xargs wc -l 2>/dev/null \
    | sort -rn \
    | head -20

  Test-file exclusion is now handled inline via grep -vE, removing the need for a separate note.

• docs/daily-file-diet.md — Updated "Scans Source Files" description and customization tip to reflect the git ls-tree approach.

Why git ls-tree

• Reads from git's object DB — no filesystem traversal
• Only lists tracked files, so node_modules, vendor, dist, etc. are automatically excluded (they're gitignored and untracked)
• Single xargs wc -l invocation instead of N processes

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[lkraav]

Tyvm 🙏