From 3ddd2046c42ae4df90daa425df3ed40ff61b4b32 Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@klayout.de>
Date: Sat, 2 Sep 2023 00:49:47 +0200
Subject: [PATCH] Ignoring __pycache__ directories in macro editor

This feature can be configured by providing a colon-separated list of directory names
to ignore in the $KLAYOUT_IGNORE_MACRO_DIRS env var.
---
 src/lym/lym/lymMacroCollection.cc | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/lym/lym/lymMacroCollection.cc b/src/lym/lym/lymMacroCollection.cc
index c55f71ba6..6712d6549 100644
--- a/src/lym/lym/lymMacroCollection.cc
+++ b/src/lym/lym/lymMacroCollection.cc
@@ -38,6 +38,7 @@
 #include "tlProgress.h"
 #include "tlFileUtils.h"
 #include "tlResources.h"
+#include "tlEnv.h"
 
 #include "rba.h"
 #include "pya.h"
@@ -363,6 +364,22 @@ namespace {
 }
 #endif
 
+//  Some directories are ignored in addition to dotfiles
+static bool dir_is_ignored (const std::string &dn)
+{
+  static std::set <std::string> ignored;
+  static bool initialized = false;
+
+  if (! initialized) {
+    //  a colon-separated list of directory names
+    std::string ign = tl::get_env ("KLAYOUT_IGNORE_MACRO_DIRS", "__pycache__");
+    auto ignv = tl::split (ign, ":");
+    ignored.insert (ignv.begin (), ignv.end ());
+  }
+
+  return ignored.find (dn) != ignored.end ();
+}
+
 void MacroCollection::scan ()
 {
   std::string p = path ();
@@ -431,6 +448,10 @@ void MacroCollection::scan ()
         continue;
       }
 
+      if (dir_is_ignored (*f)) {
+        continue;
+      }
+
       try {
 
         MacroCollection *&mc = m_folders.insert (std::make_pair (*f, (MacroCollection *) 0)).first->second;