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
  12 if __name__ == "__main__":
  13     """Converts a header dependency CSV file to Graphviz dot file.
  14
  15     The header dependency CSV files are found on the directory
  16     libcxx/test/libcxx/transitive_includes
  17     """
  18
  19     parser = argparse.ArgumentParser(
  20         description="""Converts a libc++ dependency CSV file to a Graphviz dot file.
  21 For example:
  22   libcxx/utils/graph_header_deps.py libcxx/test/libcxx/transitive_includes/cxx20.csv | dot -Tsvg > graph.svg
  23 """,
  24         formatter_class=argparse.RawDescriptionHelpFormatter,
  25     )
  26     parser.add_argument(
  27         "input",
  28         default=None,
  29         metavar="FILE",
  30         help="The header dependency CSV file.",
  31     )
  32     options = parser.parse_args()
  33
  34     print(
  35         """digraph includes {
  36 graph [nodesep=0.5, ranksep=1];
  37 node [shape=box, width=4];"""
  38     )
  39     with open(options.input, "r") as f:
  40         for line in f.readlines():
  41             elements = line.rstrip().split(" ")
  42             assert len(elements) == 2
  43
  44             print(f'\t"{elements[0]}" -> "{elements[1]}"')
  45
  46     print("}")