From d6b140b40c2db2530db5443b3f82c85ad176296e Mon Sep 17 00:00:00 2001
From: Maximilian Wedekind <wedekind@juskys.de>
Date: Fri, 14 Aug 2026 14:20:25 +0200
Subject: [PATCH] fix(excludes): skip .worktrees and .phpstan when building the
 CPG
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Two directory kinds slipped past DEFAULT_EXCLUDES/IGNORE_DIRS and broke the
build on a Laravel monorepo:

- `.worktrees/` holds full second checkouts (the layout `git worktree add`
  gets pointed at most often). Every symbol was indexed once per worktree —
  in the repo this was measured on, 13,344 of 18,630 indexed files came from
  three worktrees, so `lmc find` returned every hit four times and `impact`
  overstated the blast radius by the same factor, mixing in stale branch
  states that no longer exist anywhere.

- `.phpstan/` is PHPStan's cache. Its `resultCache.php` reaches double-digit
  MB (23 MB here); php2cpg reads the parser output into memory in one go
  (IOUtils.contentFromBufferedSource) and dies with java.lang.OutOfMemoryError.

Measured on the same repo, `lmc build` on 4,493 files: previously it aborted
with `joern-parse exit 1` and fell back to the tree-sitter index, now the
Joern CPG completes in 18 s.
---
 lmc/config.py       | 2 +-
 lmc/joern.py        | 2 ++
 lmc/server/graph.py | 2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lmc/config.py b/lmc/config.py
index d79e9fd..241a189 100644
--- a/lmc/config.py
+++ b/lmc/config.py
@@ -37,7 +37,7 @@
 IGNORE_DIRS = {
     ".git", "node_modules", "vendor", ".venv", "venv", "dist", "build",
     "__pycache__", ".idea", ".vscode", "target", "bower_components",
-    "storage", "var", "cache",
+    "storage", "var", "cache", ".worktrees", ".phpstan",
 }
 
 CONFIG_NAME = "lumos.yml"
diff --git a/lmc/joern.py b/lmc/joern.py
index e338545..3b5ae6a 100644
--- a/lmc/joern.py
+++ b/lmc/joern.py
@@ -31,6 +31,8 @@
 DEFAULT_EXCLUDES = (
     "vendor", "node_modules", ".venv", "venv", "__pycache__",
     "storage", "public", "dist", "build", "target", ".git",
+    ".worktrees",  # git worktrees: ganze Zweit-Checkouts, sonst kommt jeder Treffer n-fach
+    ".phpstan",  # PHPStan-Cache: resultCache.php wird zweistellig MB gross -> OOM beim Einlesen
 )
 
 # ponytail: joern-parse kennt kein --exclude, und was nach --frontend-args kommt,
diff --git a/lmc/server/graph.py b/lmc/server/graph.py
index ad99e29..c89e26d 100644
--- a/lmc/server/graph.py
+++ b/lmc/server/graph.py
@@ -337,7 +337,7 @@ def _walk(node, src, file, idx, def_stack):
 _IGNORE = {
     ".git", "node_modules", "vendor", ".venv", "venv", "dist", "build",
     "__pycache__", ".idea", ".vscode", "target", "bower_components",
-    "storage", "var", "cache", "__pycache__",
+    "storage", "var", "cache", "__pycache__", ".worktrees", ".phpstan",
 }
 
 _LANG_EXTS = {