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#!/usr/bin/env python2.4
import tarfile
import zipfile
import os
import sys
import datetime
try:
# FIXME: this does not work
import hashlib
md5_cons = hashlib.md5
sha1_cons = hashlib.sha1
except:
import md5
import sha
md5_cons = md5.new
sha1_cons = sha.new
def hash_file(fileobj, *hashobjects):
""" RAM efficient hashing implementation for stream-based file objects. """
data = fileobj.read(1024*1024)
while data:
for ho in hashobjects:
ho.update(data)
data = fileobj.read(1024*1024)
return (ho.hexdigest() for ho in hashobjects)
class ArchiveInfo:
def __init__(self, filename):
self.filename = filename
self.filesize = os.path.getsize(filename) # this can throw an exception
self.mtime = os.path.getmtime(filename)
self.basename = os.path.basename(filename)
def write_info(self, outfiledir):
outfilename = "%s.%s.INDEX" % (self.basename, self.mtime)
self.out_fd = open(outfilename, "w")
self.write_header()
header_end = self.out_fd.tell()
try:
self.write_tar_content()
except:
self.out_fd.seek(header_end)
try:
self.write_zip_content()
except:
self.out_fd.seek(header_end)
self.out_fd.truncate()
self.out_fd.close()
def write_header(self):
self.out_fd.write("File-dist-name: %s\n" % (self.basename))
self.out_fd.write("File-dist-size: %s\n" % (self.filesize))
self.out_fd.write("File-dist-isdistfile: 1\n")
#self.out_fd.write("File-dist-origin: %s\n" % (self.url))
#self.out_fd.write("File-dist-cpv: %s\n" % (self.cpv))
#self.out_fd.write("File-dist-cat: %s\n" % (self.cat))
#self.out_fd.write("File-dist-pn: %s\n" % (self.pn))
#self.out_fd.write("File-dist-pv: %s\n" % (self.pv))
#self.out_fd.write("File-dist-pr: %s\n" % (self.pr))
#self.out_fd.write("File-dist-pf: %s\n" % (self.pf))
#self.out_fd.write("File-dist-cpv: %s\n" % (self.cpv))
self.out_fd.write("File-dist-mtime: %s\n" %(self.mtime))
distfile = open(self.filename)
(md5, sha1) = hash_file(distfile, md5_cons(), sha1_cons())
self.out_fd.write("File-dist-md5: %s\n" % (md5))
self.out_fd.write("File-dist-sha1: %s\n" % (sha1))
distfile.close()
def write_tar_content(self):
tar = tarfile.TarFile.open(self.filename, 'r')
file_info = tar.next()
filecount = 0
while file_info != None:
if file_info.isfile():
file_stream = tar.extractfile(file_info)
if file_stream == None:
print "Filestream empty on %s" % (file_info.name)
pass
else:
self.out_fd.write("File-%05d-name: %s\n" %(filecount, file_info.name))
self.out_fd.write("File-%05d-size: %s\n" %(filecount, file_info.size))
self.out_fd.write("File-%05d-mtime: %s\n" %(filecount, file_info.mtime))
(md5, sha1) = hash_file(file_stream, md5_cons(), sha1_cons())
self.out_fd.write("File-%05d-md5: %s\n" %(filecount, md5))
self.out_fd.write("File-%05d-sha1: %s\n" %(filecount, sha1))
filecount += 1
file_info = tar.next()
tar.close()
def write_zip_content(self):
zip = zipfile.ZipFile(self.filename, 'r')
filecount = 0
for name in zip.namelist():
file_info = zip.getinfo(name)
if os.path.basename(file_info.filename) == "":
# this is a directory
continue
file_content = zip.read(name) # Doesn't work stream based :-/
file_time = datetime.datetime(*file_info.date_time)
self.out_fd.write("File-%05d-name: %s\n" %(filecount, file_info.filename))
self.out_fd.write("File-%05d-size: %s\n" %(filecount, file_info.file_size))
self.out_fd.write("File-%05d-mtime: %s\n" %(filecount, file_time.strftime("%s")))
md5 = md5_cons(file_content).hexdigest()
sha1 = sha1_cons(file_content).hexdigest()
self.out_fd.write("File-%05d-md5: %s\n" %(filecount, md5))
self.out_fd.write("File-%05d-sha1: %s\n" %(filecount, sha1))
filecount += 1
zip.close()
def main():
import getopt
try:
optlist, list = getopt.getopt(sys.argv[1:],
'f:P:hu:')
except getopt.GetoptError:
usage(sys.argv[0])
sys.exit(2)
infilename = None
outdir = "."
for opt, arg in optlist:
if opt == '-h':
usage(sys.argv[0])
sys.exit(0)
if opt == '-f':
infilename = arg
if opt == '-P':
outdir = arg
if not infilename:
print "Please specify a filename."
else:
try:
a = ArchiveInfo(infilename)
filename = a.write_info(outdir)
except:
print infilename, " could not be opened"
def usage(programname):
""" Print usage information """
print "Usage: %s [-h] [-P <dir>] [-f <file>]" % (programname)
print '''
This script opens the file specified by -f, and writes the index to the directory specified by -P.
Parameters:
-h Display this help
-f file Path to the file to index, must be present
-P path Directory to create the index file in (default: .)
'''
if __name__ == "__main__":
try:
main()
except KeyboardInterrupt:
print '\n ! Exiting.'
|
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