summaryrefslogtreecommitdiffstats
path: root/third_party/libwebrtc/build/fix_gn_headers.py
blob: 71fb332bfd1800e1d214a30577b2530892e30ae8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
#!/usr/bin/env python
# Copyright 2017 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Fix header files missing in GN.

This script takes the missing header files from check_gn_headers.py, and
try to fix them by adding them to the GN files.
Manual cleaning up is likely required afterwards.
"""

from __future__ import print_function

import argparse
import os
import re
import subprocess
import sys


def GitGrep(pattern):
  p = subprocess.Popen(
      ['git', 'grep', '-En', pattern, '--', '*.gn', '*.gni'],
      stdout=subprocess.PIPE)
  out, _ = p.communicate()
  return out, p.returncode


def ValidMatches(basename, cc, grep_lines):
  """Filter out 'git grep' matches with header files already."""
  matches = []
  for line in grep_lines:
    gnfile, linenr, contents = line.split(':')
    linenr = int(linenr)
    new = re.sub(cc, basename, contents)
    lines = open(gnfile).read().splitlines()
    assert contents in lines[linenr - 1]
    # Skip if it's already there. It could be before or after the match.
    if lines[linenr] == new:
      continue
    if lines[linenr - 2] == new:
      continue
    print('    ', gnfile, linenr, new)
    matches.append((gnfile, linenr, new))
  return matches


def AddHeadersNextToCC(headers, skip_ambiguous=True):
  """Add header files next to the corresponding .cc files in GN files.

  When skip_ambiguous is True, skip if multiple .cc files are found.
  Returns unhandled headers.

  Manual cleaning up is likely required, especially if not skip_ambiguous.
  """
  edits = {}
  unhandled = []
  for filename in headers:
    filename = filename.strip()
    if not (filename.endswith('.h') or filename.endswith('.hh')):
      continue
    basename = os.path.basename(filename)
    print(filename)
    cc = r'\b' + os.path.splitext(basename)[0] + r'\.(cc|cpp|mm)\b'
    out, returncode = GitGrep('(/|")' + cc + '"')
    if returncode != 0 or not out:
      unhandled.append(filename)
      continue

    matches = ValidMatches(basename, cc, out.splitlines())

    if len(matches) == 0:
      continue
    if len(matches) > 1:
      print('\n[WARNING] Ambiguous matching for', filename)
      for i in enumerate(matches, 1):
        print('%d: %s' % (i[0], i[1]))
      print()
      if skip_ambiguous:
        continue

      picked = raw_input('Pick the matches ("2,3" for multiple): ')
      try:
        matches = [matches[int(i) - 1] for i in picked.split(',')]
      except (ValueError, IndexError):
        continue

    for match in matches:
      gnfile, linenr, new = match
      print('  ', gnfile, linenr, new)
      edits.setdefault(gnfile, {})[linenr] = new

  for gnfile in edits:
    lines = open(gnfile).read().splitlines()
    for l in sorted(edits[gnfile].keys(), reverse=True):
      lines.insert(l, edits[gnfile][l])
    open(gnfile, 'w').write('\n'.join(lines) + '\n')

  return unhandled


def AddHeadersToSources(headers, skip_ambiguous=True):
  """Add header files to the sources list in the first GN file.

  The target GN file is the first one up the parent directories.
  This usually does the wrong thing for _test files if the test and the main
  target are in the same .gn file.
  When skip_ambiguous is True, skip if multiple sources arrays are found.

  "git cl format" afterwards is required. Manually cleaning up duplicated items
  is likely required.
  """
  for filename in headers:
    filename = filename.strip()
    print(filename)
    dirname = os.path.dirname(filename)
    while not os.path.exists(os.path.join(dirname, 'BUILD.gn')):
      dirname = os.path.dirname(dirname)
    rel = filename[len(dirname) + 1:]
    gnfile = os.path.join(dirname, 'BUILD.gn')

    lines = open(gnfile).read().splitlines()
    matched = [i for i, l in enumerate(lines) if ' sources = [' in l]
    if skip_ambiguous and len(matched) > 1:
      print('[WARNING] Multiple sources in', gnfile)
      continue

    if len(matched) < 1:
      continue
    print('  ', gnfile, rel)
    index = matched[0]
    lines.insert(index + 1, '"%s",' % rel)
    open(gnfile, 'w').write('\n'.join(lines) + '\n')


def RemoveHeader(headers, skip_ambiguous=True):
  """Remove non-existing headers in GN files.

  When skip_ambiguous is True, skip if multiple matches are found.
  """
  edits = {}
  unhandled = []
  for filename in headers:
    filename = filename.strip()
    if not (filename.endswith('.h') or filename.endswith('.hh')):
      continue
    basename = os.path.basename(filename)
    print(filename)
    out, returncode = GitGrep('(/|")' + basename + '"')
    if returncode != 0 or not out:
      unhandled.append(filename)
      print('  Not found')
      continue

    grep_lines = out.splitlines()
    matches = []
    for line in grep_lines:
      gnfile, linenr, contents = line.split(':')
      print('    ', gnfile, linenr, contents)
      linenr = int(linenr)
      lines = open(gnfile).read().splitlines()
      assert contents in lines[linenr - 1]
      matches.append((gnfile, linenr, contents))

    if len(matches) == 0:
      continue
    if len(matches) > 1:
      print('\n[WARNING] Ambiguous matching for', filename)
      for i in enumerate(matches, 1):
        print('%d: %s' % (i[0], i[1]))
      print()
      if skip_ambiguous:
        continue

      picked = raw_input('Pick the matches ("2,3" for multiple): ')
      try:
        matches = [matches[int(i) - 1] for i in picked.split(',')]
      except (ValueError, IndexError):
        continue

    for match in matches:
      gnfile, linenr, contents = match
      print('  ', gnfile, linenr, contents)
      edits.setdefault(gnfile, set()).add(linenr)

  for gnfile in edits:
    lines = open(gnfile).read().splitlines()
    for l in sorted(edits[gnfile], reverse=True):
      lines.pop(l - 1)
    open(gnfile, 'w').write('\n'.join(lines) + '\n')

  return unhandled


def main():
  parser = argparse.ArgumentParser()
  parser.add_argument('input_file', help="missing or non-existing headers, "
                      "output of check_gn_headers.py")
  parser.add_argument('--prefix',
                      help="only handle path name with this prefix")
  parser.add_argument('--remove', action='store_true',
                      help="treat input_file as non-existing headers")

  args, _extras = parser.parse_known_args()

  headers = open(args.input_file).readlines()

  if args.prefix:
    headers = [i for i in headers if i.startswith(args.prefix)]

  if args.remove:
    RemoveHeader(headers, False)
  else:
    unhandled = AddHeadersNextToCC(headers)
    AddHeadersToSources(unhandled)


if __name__ == '__main__':
  sys.exit(main())