From c5949de543bbf201c0e935ef81024deca8024e3c Mon Sep 17 00:00:00 2001
From: Peter Eisenmann <p3732@getgoogleoff.me>
Date: Fri, 29 Mar 2024 01:52:53 +0100
Subject: [PATCH] gir: only initialize search paths once

---
 blueprintcompiler/gir.py | 47 ++++++++++++++++++++++++++++++----------
 1 file changed, 36 insertions(+), 11 deletions(-)

diff --git a/blueprintcompiler/gir.py b/blueprintcompiler/gir.py
index a33bb26..f4bf4e3 100644
--- a/blueprintcompiler/gir.py
+++ b/blueprintcompiler/gir.py
@@ -35,6 +35,10 @@ _namespace_cache: T.Dict[str, "Namespace"] = {}
 _xml_cache = {}
 
 _user_search_paths = []
+_typelib_search_paths_initalized: bool = False
+_typelib_search_paths: list[str] = []
+_gir_search_paths_initalized: bool = False
+_gir_search_paths: list[str] = []
 
 
 def add_user_typelib_paths(paths: list):
@@ -42,13 +46,39 @@ def add_user_typelib_paths(paths: list):
     _user_search_paths += paths
 
 
+def collect_typelib_search_paths():
+    global _typelib_search_paths_initalized
+    if _typelib_search_paths_initalized:
+        return
+
+    global _typelib_search_paths
+    _typelib_search_paths += [
+        *_user_search_paths,
+        *GIRepository.Repository.get_search_path(),
+    ]
+    _typelib_search_paths_initalized = True
+
+
+def collect_gir_search_paths():
+    global _gir_search_paths_initalized
+    if _gir_search_paths_initalized:
+        return
+
+    global _gir_search_paths
+    if data_paths := os.environ.get("XDG_DATA_DIRS"):
+        _gir_search_paths += [
+            os.path.join(path, "gir-1.0") for path in data_paths.split(os.pathsep)
+        ]
+    _gir_search_paths_initalized = True
+
+
 def get_namespace(namespace: str, version: str) -> "Namespace":
-    search_paths = [*GIRepository.Repository.get_search_path(), *_user_search_paths]
+    collect_typelib_search_paths()
 
     filename = f"{namespace}-{version}.typelib"
 
     if filename not in _namespace_cache:
-        for search_path in search_paths:
+        for search_path in _typelib_search_paths:
             path = os.path.join(search_path, filename)
 
             if os.path.exists(path) and os.path.isfile(path):
@@ -61,7 +91,7 @@ def get_namespace(namespace: str, version: str) -> "Namespace":
         if filename not in _namespace_cache:
             raise CompileError(
                 f"Namespace {namespace}-{version} could not be found",
-                hints=["search path: " + os.pathsep.join(search_paths)],
+                hints=["search path: " + os.pathsep.join(_typelib_search_paths)],
             )
 
     return _namespace_cache[filename]
@@ -94,17 +124,12 @@ def get_available_namespaces() -> T.List[T.Tuple[str, str]]:
 
 
 def get_xml(namespace: str, version: str):
-    search_paths = []
-
-    if data_paths := os.environ.get("XDG_DATA_DIRS"):
-        search_paths += [
-            os.path.join(path, "gir-1.0") for path in data_paths.split(os.pathsep)
-        ]
+    collect_gir_search_paths()
 
     filename = f"{namespace}-{version}.gir"
 
     if filename not in _xml_cache:
-        for search_path in search_paths:
+        for search_path in _gir_search_paths:
             path = os.path.join(search_path, filename)
 
             if os.path.exists(path) and os.path.isfile(path):
@@ -114,7 +139,7 @@ def get_xml(namespace: str, version: str):
         if filename not in _xml_cache:
             raise CompileError(
                 f"GObject introspection file '{namespace}-{version}.gir' could not be found",
-                hints=["search path: " + os.pathsep.join(search_paths)],
+                hints=["search path: " + os.pathsep.join(_gir_search_paths)],
             )
 
     return _xml_cache[filename]