libcxx/utils/graph_header_deps.py

   1 #!/usr/bin/env python
   2 # ===----------------------------------------------------------------------===##
   3 #
   4 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 # See https://llvm.org/LICENSE.txt for license information.
   6 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 #
   8 # ===----------------------------------------------------------------------===##
   9
  10 import argparse
  11 import sys
  12
  13 if __name__ == "__main__":
  14     """Converts a header dependency CSV file to Graphviz dot file.
  15
  16     The header dependency CSV files are found on the directory
  17     libcxx/test/libcxx/transitive_includes
  18     """
  19
  20     parser = argparse.ArgumentParser(
  21         description="""Converts a libc++ dependency CSV file to a Graphviz dot file.
  22 For example:
  23   libcxx/utils/graph_header_deps.py libcxx/test/libcxx/transitive_includes/cxx20.csv | dot -Tsvg > graph.svg
  24 """,
  25         formatter_class=argparse.RawDescriptionHelpFormatter,
  26     )
  27     parser.add_argument(
  28         "input",
  29         default=None,
  30         metavar="FILE",
  31         help="The header dependency CSV file.",
  32     )
  33     options = parser.parse_args()
  34
  35     print(
  36         """digraph includes {
  37 graph [nodesep=0.5, ranksep=1];
  38 node [shape=box, width=4];"""
  39     )
  40     with open(options.input, "r") as f:
  41         for line in f.readlines():
  42             elements = line.rstrip().split(" ")
  43             assert len(elements) == 2
  44
  45             print(f'\t"{elements[0]}" -> "{elements[1]}"')
  46
  47     print("}")