lint: discover projects instead of listing them

[ResurrectedTrader]

scripts/lint.ps1 kept the project layout in hand-maintained lists (compile-database paths, a file glob per project, the databases loaded for cache keys, the .clang-tidy configs, the vendored header trees), and build.ps1 fix kept another copy. They had drifted:

• services was never cached. It was missing from the databases loaded for cache keys, so its files were never dependency-scanned and were re-linted on every run.
• V8 changes never invalidated the cache. The fingerprint pointed at dependencies\v8\include, which no longer exists.
• fix skipped the tests.

This derives everything from the projects instead:

• Projects: every .vcxproj under src\ and tests\. Each is linted on Win32 when it has a Win32 configuration, otherwise on the platform it has. A missing or stale compile database regenerates each platform that needs it.
• Files and commands: read from each project's own compile database. A source compiled by several projects (the tests build Pathfinder.cpp) is linted once, with the project whose directory holds it. That is the same 119 files as before.
• Cache invalidation: a project header is anything inside a project directory. Every include directory outside one (V8, D2MOO, the vcpkg install) is fingerprinted into the environment token, as is every .clang-tidy and vcpkg.json. None of those trees is linted; they only invalidate the cache.
• build.ps1 fix: runs lint.ps1 -Fix over the same file set.

It also fixes header caching. The dependency scan attributed each rule to the first .cpp path it named, so a unit whose main file is a header was never cached. Rules are now matched against the files that were scanned.

Adding a project (a second backend, another glue DLL) now needs no lint changes.

Testing

• Cold run: databases regenerated from scratch, then 119 files linted, 119 passed, in 3:30.
• Warm run: 119 of 119 cached, 1 s. That includes services, which previously re-ran every time.
• Invalidation: editing services/update/UpdateChecker.h re-linted exactly the 3 files that include it; the other 116 came from the cache.
• Header unit: a scan whose main file is a header now gets its dependency entry.
• Vendored fingerprints: they cover V8 (113 headers), D2MOO and vcpkg (227 headers), and computing the token takes about 0.1 s.
• build.ps1 fix: discovers the same files and applies fixes. I stopped the smoke test after a few files; nothing changed.

🤖 Generated with Claude Code