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1#!/usr/bin/env python
2
3#===- cindex-includes.py - cindex/Python Inclusion Graph -----*- python -*--===#
4#
5#                     The LLVM Compiler Infrastructure
6#
7# This file is distributed under the University of Illinois Open Source
8# License. See LICENSE.TXT for details.
9#
10#===------------------------------------------------------------------------===#
11
12"""
13A simple command line tool for dumping a Graphviz description (dot) that
14describes include dependencies.
15"""
16
17def main():
18    import sys
19    from clang.cindex import Index
20
21    from optparse import OptionParser, OptionGroup
22
23    parser = OptionParser("usage: %prog [options] {filename} [clang-args*]")
24    parser.disable_interspersed_args()
25    (opts, args) = parser.parse_args()
26    if len(args) == 0:
27        parser.error('invalid number arguments')
28
29    # FIXME: Add an output file option
30    out = sys.stdout
31
32    index = Index.create()
33    tu = index.parse(None, args)
34    if not tu:
35        parser.error("unable to load input")
36
37    # A helper function for generating the node name.
38    def name(f):
39        if f:
40            return "\"" + f.name + "\""
41
42    # Generate the include graph
43    out.write("digraph G {\n")
44    for i in tu.get_includes():
45        line = "  ";
46        if i.is_input_file:
47            # Always write the input file as a node just in case it doesn't
48            # actually include anything. This would generate a 1 node graph.
49            line += name(i.include)
50        else:
51            line += '%s->%s' % (name(i.source), name(i.include))
52        line += "\n";
53        out.write(line)
54    out.write("}\n")
55
56if __name__ == '__main__':
57    main()
58
59