graphify per-language AST extractors strip member-expression callees
(`x.foo()`, `obj.bar()`, `Pkg::baz()`) down to the trailing identifier,
queue them in `raw_calls`, and the cross-file resolver matches by bare
lowercase name against a global symbol table. When any file in the
corpus exposes a top-level helper with a common method name (e.g. a
`function log(...)` in a one-off smoke-test script), every unrelated
`Logger.log(...)` / `this.x.find(...)` / `Pkg::baz(...)` call across the
codebase resolves to that single helper, producing phantom god nodes
with hundreds of bogus INFERRED edges.
This patch:
* Adds `_MEMBER_CALL_NODE_TYPES` enumerating member-expression AST
node types across all supported languages.
* Tags every `raw_calls.append(...)` site with `callee_node_type`.
* Skips entries whose `callee_node_type` is in
`_MEMBER_CALL_NODE_TYPES` from the cross-file resolver in
`extract()`. In-file resolution behaviour is intentionally
preserved.
On a real production codebase (~1,668 TS/JS files, NestJS + Nuxt) this
eliminates 1,262 phantom edges and removes a phantom `log()` god node
that previously sat at #2 with 265 inbound edges (255 of them bogus).
Includes 3 regression tests that fail on the original code and pass with
this patch.
Luke Longo
5f4f557034