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Python script to find the largest files in a git repository.
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#!/usr/bin/python | |
# -*- coding: utf-8 -*- | |
# Python script to find the largest files in a git repository. | |
# The general method is based on the script in this blog post: | |
# http://stubbisms.wordpress.com/2009/07/10/git-script-to-show-largest-pack-objects-and-trim-your-waist-line/ | |
# | |
# The above script worked for me, but was very slow on my 11GB repository. This version has a bunch | |
# of changes to speed things up to a more reasonable time. It takes less than a minute on repos with 250K objects. | |
from subprocess import check_output, CalledProcessError, Popen, PIPE | |
import argparse | |
import signal | |
import sys | |
sortByOnDiskSize = False | |
def main(): | |
global sortByOnDiskSize | |
signal.signal(signal.SIGINT, signal_handler) | |
args = parseArguments() | |
sortByOnDiskSize = args.sortByOnDiskSize | |
sizeLimit = 1024*args.filesExceeding | |
if args.filesExceeding > 0: | |
print "Finding objects larger than {}kB…".format(args.filesExceeding) | |
else: | |
print "Finding the {} largest objects…".format(args.matchCount) | |
blobs = getTopBlobs(args.matchCount, sizeLimit) | |
populateBlobPaths(blobs) | |
printOutBlobs(blobs) | |
def getTopBlobs(count, sizeLimit): | |
sortColumn = 4 | |
if sortByOnDiskSize: | |
sortColumn = 3 | |
verifyPack = "git verify-pack -v `git rev-parse --git-dir`/objects/pack/pack-*.idx | grep blob | sort -k{}nr".format(sortColumn) | |
output = check_output(verifyPack, shell=True).split("\n")[:-1] | |
blobs = dict() | |
compareBlob = Blob("a b {} {} c".format(sizeLimit, sizeLimit)) # use __lt__ to do the appropriate comparison | |
for objLine in output: | |
blob = Blob(objLine) | |
if sizeLimit > 0: | |
if compareBlob < blob: | |
blobs[blob.sha1] = blob | |
else: | |
break | |
else: | |
blobs[blob.sha1] = blob | |
if len(blobs) == count: | |
break | |
return blobs | |
def populateBlobPaths(blobs): | |
if len(blobs): | |
print "Finding object paths…" | |
# Only include revs which have a path. Other revs aren't blobs. | |
revList = "git rev-list --all --objects | awk '$2 {print}'" | |
allObjectLines = check_output(revList, shell=True).split("\n")[:-1] | |
outstandingKeys = blobs.keys() | |
for line in allObjectLines: | |
cols = line.split() | |
sha1, path = cols[0], " ".join(cols[1:]) | |
if (sha1 in outstandingKeys): | |
outstandingKeys.remove(sha1) | |
blobs[sha1].path = path | |
# short-circuit the search if we're done | |
if not len(outstandingKeys): | |
break | |
def printOutBlobs(blobs): | |
if len(blobs): | |
csvLines = ["size,pack,hash,path"] | |
for blob in sorted(blobs.values(), reverse=True): | |
csvLines.append(blob.csvLine()) | |
p = Popen(["column", "-t", "-s", "','"], stdin=PIPE, stdout=PIPE, stderr=PIPE) | |
stdout, stderr = p.communicate("\n".join(csvLines)) | |
print "\nAll sizes in kB. The pack column is the compressed size of the object inside the pack file.\n" | |
print stdout.rstrip('\n') | |
else: | |
print "No files found which match those criteria." | |
def parseArguments(): | |
parser = argparse.ArgumentParser(description='List the largest files in a git repository') | |
parser.add_argument('-c', '--match-count', dest='matchCount', type=int, default=10, | |
help='The number of files to return. Default is 10. Ignored if --files-exceeding is used.') | |
parser.add_argument('--files-exceeding', dest='filesExceeding', type=int, default=0, | |
help='The cutoff amount, in KB. Files with a pack size (or pyhsical size, with -p) larger than this will be printed.') | |
parser.add_argument('-p', '--physical-sort', dest='sortByOnDiskSize', action='store_true', default=False, | |
help='Sort by the on-disk size of the files. Default is to sort by the pack size.') | |
return parser.parse_args() | |
def signal_handler(signal, frame): | |
print('Caught Ctrl-C. Exiting.') | |
sys.exit(0) | |
class Blob(object): | |
sha1 = '' | |
size = 0 | |
packedSize = 0 | |
path = '' | |
def __init__(self, line): | |
cols = line.split() | |
self.sha1, self.size, self.packedSize = cols[0], int(cols[2]), int(cols[3]) | |
def __repr__(self): | |
return '{} - {} - {} - {}'.format(self.sha1, self.size, self.packedSize, self.path) | |
def __lt__(self, other): | |
if (sortByOnDiskSize): | |
return self.size < other.size | |
else: | |
return self.packedSize < other.packedSize | |
def csvLine(self): | |
return "{},{},{},{}".format(self.size/1024, self.packedSize/1024, self.sha1, self.path) | |
# Default function is main() | |
if __name__ == '__main__': | |
main() |
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