libvirt/scripts/reformat-news.py

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#!/usr/bin/env python3
# reformat-news.py: Reformat the NEWS file properly
#
# Copyright (C) 2017 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see
# <http://www.gnu.org/licenses/>.
import sys
COLUMNS = 80
def reformat_with_indent(text, initial_indent, indent):
res = ""
line = initial_indent
for word in text.split():
# If adding one more word (plus a whitespace, plus a newline)
# to the current line would push us over the desired number
# of columns we start a new line instead
if len(line) + len(word) > (COLUMNS - 2):
res = res + line + "\n"
line = indent
# We need to take care when we've just started a new line,
# as we don't want to add any additional leading whitespace
# in that case
if line == indent or line == initial_indent:
line = line + word
else:
line = line + " " + word
# Append whatever's left
res = res + line
return res
def reformat(line):
# Empty lines don't need to be reformatted or even inspected
if len(line) == 0:
return line
# For all non-empty lines, we decide the indentation level based
# on the first character
marker = line[0]
# Release
if marker == '#':
initial_indent = 0
indent = 2
# Section
elif marker == '*':
initial_indent = 2
indent = 4
# Change summary
elif marker == '-':
initial_indent = 4
indent = 6
# Change description
elif marker == '|':
initial_indent = 8
indent = 8
# In this one case, the marker should not ultimately show
# up in the output file, so we strip it before moving on
line = line[1:]
# Anything else should be left as-is
else:
return line
return reformat_with_indent(line, " " * initial_indent, " " * indent)
def main(args):
if len(args) < 2:
sys.stdout.write("Usage: " + args[0] + " FILE\n")
sys.exit(1)
with open(args[1], 'r') as f:
for line in f:
print(reformat(line.strip()))
if __name__ == "__main__":
main(sys.argv)