revert to networkx for builder

.github/workflows/linux-nodejs-workflow.yml

@@ -10,6 +10,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
+      - name: Install networkx
+        run: /opt/python/cp310-cp310/bin/python -m pip install networkx --user
+
       - name: Build Node.js native module
         run: |
           make nodejs NUM_THREADS=$(nproc)
@@ -29,6 +32,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
+      - name: Install networkx
+        run: /opt/python/cp310-cp310/bin/python -m pip install networkx --user
+
       - name: Build Node.js native module
         run: |
           make nodejs NUM_THREADS=$(nproc)

scripts/collect-single-file-header.py

@@ -1,9 +1,9 @@
 #!/usr/bin/env python
-import graphlib
+import logging
+import networkx as nx
 import os
-import sys
 import shutil
-import logging
+import sys
 
 from typing import Optional
 from pathlib import Path
@@ -62,19 +62,20 @@ def build_graph(graph, source_file):
             logging.debug(
                 "Resolved %s in %s to %s" % (header_path, source_file, header_real_path)
             )
-            graph.add(source_file, header_real_path)
+            graph.add_edge(source_file, header_real_path)
             build_graph(graph, header_real_path)
 
 
 def create_merged_header():
-    graph = graphlib.TopologicalSorter()
+    graph = nx.DiGraph()
     logging.info("Building dependency graph...")
     build_graph(graph, START_POINT)
+    topo_order = list(nx.topological_sort(graph))
     logging.info("Topological sorting...")
     logging.info("Writing merged header...")
     with open(OUTPUT_PATH, "w") as f:
         f.write("#pragma once\n")
-        for header_path in graph.static_order():
+        for header_path in reversed(topo_order):
             with header_path.open() as f2:
                 for line in f2.readlines():
                     if not (