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#!/usr/bin/env vpython3
# Copyright 2016 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Script to extract edits from clang tool output.
If a clang tool emits edits, then the edits should look like this:
...
==== BEGIN EDITS ====
<edit1>
<edit2>
...
==== END EDITS ====
...
extract_edits.py takes input that is concatenated from multiple tool invocations
and extract just the edits. In other words, given the following input:
...
==== BEGIN EDITS ====
<edit1>
<edit2>
==== END EDITS ====
...
==== BEGIN EDITS ====
<yet another edit1>
<yet another edit2>
==== END EDITS ====
...
extract_edits.py would emit the following output:
<edit1>
<edit2>
<yet another edit1>
<yet another edit2>
This python script is mainly needed on Windows.
On unix this script can be replaced with running sed as follows:
$ cat run_tool.debug.out \
| sed '/^==== BEGIN EDITS ====$/,/^==== END EDITS ====$/{//!b};d'
| sort | uniq
"""
from __future__ import print_function
import sys
def main():
# TODO(dcheng): extract_edits.py should normalize paths. Doing this in
# apply_edits.py is too late, as a common use case is to apply edits from many
# different platforms.
unique_lines = set()
inside_marker_lines = False
for line in sys.stdin:
line = line.rstrip("\n\r")
if line == '==== BEGIN EDITS ====':
inside_marker_lines = True
continue
if line == '==== END EDITS ====':
inside_marker_lines = False
continue
if inside_marker_lines and line not in unique_lines:
unique_lines.add(line)
print(line)
return 0
if __name__ == '__main__':
sys.exit(main())
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