llvm-project/lldb/utils/misc/grep-svn-log.py
Kate Stone b9c1b51e45 *** This commit represents a complete reformatting of the LLDB source code
*** to conform to clang-format’s LLVM style.  This kind of mass change has
*** two obvious implications:

Firstly, merging this particular commit into a downstream fork may be a huge
effort.  Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit.  The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):

    find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
    find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;

The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.

Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit.  There are alternatives available that will attempt
to look through this change and find the appropriate prior commit.  YMMV.

llvm-svn: 280751
2016-09-06 20:57:50 +00:00

97 lines
2.4 KiB
Python
Executable File

#!/usr/bin/env python
"""
Greps and returns the first svn log entry containing a line matching the regular
expression pattern passed as the only arg.
Example:
svn log -v | grep-svn-log.py '^ D.+why_are_you_missing.h$'
"""
import fileinput
import re
import sys
import StringIO
# Separator string for "svn log -v" output.
separator = '-' * 72
usage = """Usage: grep-svn-log.py line-pattern
Example:
svn log -v | grep-svn-log.py '^ D.+why_are_you_missing.h'"""
class Log(StringIO.StringIO):
"""Simple facade to keep track of the log content."""
def __init__(self):
self.reset()
def add_line(self, a_line):
"""Add a line to the content, if there is a previous line, commit it."""
global separator
if self.prev_line is not None:
print >> self, self.prev_line
self.prev_line = a_line
self.separator_added = (a_line == separator)
def del_line(self):
"""Forget about the previous line, do not commit it."""
self.prev_line = None
def reset(self):
"""Forget about the previous lines entered."""
StringIO.StringIO.__init__(self)
self.prev_line = None
def finish(self):
"""Call this when you're finished with populating content."""
if self.prev_line is not None:
print >> self, self.prev_line
self.prev_line = None
def grep(regexp):
# The log content to be written out once a match is found.
log = Log()
LOOKING_FOR_MATCH = 0
FOUND_LINE_MATCH = 1
state = LOOKING_FOR_MATCH
while True:
line = sys.stdin.readline()
if not line:
return
line = line.splitlines()[0]
if state == FOUND_LINE_MATCH:
# At this state, we keep on accumulating lines until the separator
# is encountered. At which point, we can return the log content.
if line == separator:
log.finish()
print log.getvalue()
return
log.add_line(line)
elif state == LOOKING_FOR_MATCH:
if line == separator:
log.reset()
log.add_line(line)
# Update next state if necessary.
if regexp.search(line):
state = FOUND_LINE_MATCH
def main():
if len(sys.argv) != 2:
print usage
sys.exit(0)
regexp = re.compile(sys.argv[1])
grep(regexp)
sys.stdin.close()
if __name__ == '__main__':
main()