#!/usr/bin/env python
|
|
# Copyright (C) 2016 Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
|
|
# This program is free software; you can redistribute it and/or modify
|
# it under the terms of the GNU General Public License as published by
|
# the Free Software Foundation; either version 2 of the License, or
|
# (at your option) any later version.
|
#
|
# This program 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
|
# General Public License for more details.
|
#
|
# You should have received a copy of the GNU General Public License
|
# along with this program; if not, write to the Free Software
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
# TODO (improvements)
|
# - support K,M,G size suffixes for threshold
|
# - output CSV file in addition to stdout reporting
|
|
import csv
|
import argparse
|
import sys
|
|
def read_file_size_csv(inputf, detail=None):
|
"""Extract package or file sizes from CSV file into size dictionary"""
|
sizes = {}
|
reader = csv.reader(inputf)
|
|
header = next(reader)
|
if (header[0] != 'File name' or header[1] != 'Package name' or
|
header[2] != 'File size' or header[3] != 'Package size'):
|
print(("Input file %s does not contain the expected header. Are you "
|
"sure this file corresponds to the file-size-stats.csv "
|
"file created by 'make graph-size'?") % inputf.name)
|
sys.exit(1)
|
|
for row in reader:
|
if detail:
|
sizes[row[0]] = int(row[2])
|
else:
|
sizes[row[1]] = int(row[3])
|
|
return sizes
|
|
def compare_sizes(old, new):
|
"""Return delta/added/removed dictionaries based on two input size
|
dictionaries"""
|
delta = {}
|
oldkeys = set(old.keys())
|
newkeys = set(new.keys())
|
|
# packages/files in both
|
for entry in newkeys.intersection(oldkeys):
|
delta[entry] = ('', new[entry] - old[entry])
|
# packages/files only in new
|
for entry in newkeys.difference(oldkeys):
|
delta[entry] = ('added', new[entry])
|
# packages/files only in old
|
for entry in oldkeys.difference(newkeys):
|
delta[entry] = ('removed', -old[entry])
|
|
return delta
|
|
def print_results(result, threshold):
|
"""Print the given result dictionary sorted by size, ignoring any entries
|
below or equal to threshold"""
|
|
from six import iteritems
|
list_result = list(iteritems(result))
|
# result is a dictionary: name -> (flag, size difference)
|
# list_result is a list of tuples: (name, (flag, size difference))
|
|
for entry in sorted(list_result, key=lambda entry: entry[1][1]):
|
if threshold is not None and abs(entry[1][1]) <= threshold:
|
continue
|
print('%12s %7s %s' % (entry[1][1], entry[1][0], entry[0]))
|
|
|
# main #########################################################################
|
|
description = """
|
Compare rootfs size between Buildroot compilations, for example after changing
|
configuration options or after switching to another Buildroot release.
|
|
This script compares the file-size-stats.csv file generated by 'make graph-size'
|
with the corresponding file from another Buildroot compilation.
|
The size differences can be reported per package or per file.
|
Size differences smaller or equal than a given threshold can be ignored.
|
"""
|
|
parser = argparse.ArgumentParser(description=description,
|
formatter_class=argparse.RawDescriptionHelpFormatter)
|
|
parser.add_argument('-d', '--detail', action='store_true',
|
help='''report differences for individual files rather than
|
packages''')
|
parser.add_argument('-t', '--threshold', type=int,
|
help='''ignore size differences smaller or equal than this
|
value (bytes)''')
|
parser.add_argument('old_file_size_csv', type=argparse.FileType('r'),
|
metavar='old-file-size-stats.csv',
|
help="""old CSV file with file and package size statistics,
|
generated by 'make graph-size'""")
|
parser.add_argument('new_file_size_csv', type=argparse.FileType('r'),
|
metavar='new-file-size-stats.csv',
|
help='new CSV file with file and package size statistics')
|
args = parser.parse_args()
|
|
if args.detail:
|
keyword = 'file'
|
else:
|
keyword = 'package'
|
|
old_sizes = read_file_size_csv(args.old_file_size_csv, args.detail)
|
new_sizes = read_file_size_csv(args.new_file_size_csv, args.detail)
|
|
delta = compare_sizes(old_sizes, new_sizes)
|
|
print('Size difference per %s (bytes), threshold = %s' % (keyword, args.threshold))
|
print(80*'-')
|
print_results(delta, args.threshold)
|
print(80*'-')
|
print_results({'TOTAL': ('', sum(new_sizes.values()) - sum(old_sizes.values()))},
|
threshold=None)
|
