def compressTarDefault(name, overwrite=None, outname=None, prefs=None):
"""
:type string: dirName - the name of the dir to tar
:type bool: overwrite - overwrite destination
Generic compress method for creating .tar.lz4 from a dir.
***WARNING*** Currently uses StringIO object until lz4file supports write.
Avoid using for large directories, it will consume quite a bit of RAM.
"""
if not outname:
outname = '.'.join([name.rstrip('/'), 'tar', 'lz4'])
if not os.path.exists(name):
print('Unable to locate the directory to compress.')
return
buff = StringIO()
tarbuff = Lz4Tar.open(fileobj=buff, mode='w')
tarbuff.add(name)
tarbuff.close()
buff.seek(0)
cCtx = lz4f.createCompContext()
header = lz4f.compressBegin(cCtx, prefs)
with __builtin__.open(outname, 'wb') as out:
out.write(header)
while True:
decompData = buff.read((64*(1 << 10)))
if not decompData:
break
compData = lz4f.compressUpdate(decompData, cCtx)
out.write(compData)
out.write(lz4f.compressEnd(cCtx))
out.flush()
lz4f.freeCompContext(cCtx)
del tarbuff, buff
def compressTarDefault(dirName, overwrite=None, outname=None, prefs=None):
"""
:type string: dirName - the name of the dir to tar
:type bool: overwrite - overwrite destination
Generic compress method for creating .tar.lz4 from a dir.
***WARNING*** Currently uses StringIO object until lz4file supports write.
Avoid using for large directories, it will consume quite a bit of RAM.
"""
if not outname:
outname = '.'.join([dirName.rstrip('/'), 'tar', 'lz4'])
if not os.path.exists(dirName):
print('Unable to locate the directory to compress.')
return
buff = StringIO()
tarbuff = Lz4Tar.open(fileobj=buff, mode='w')
tarbuff.add(dirName)
tarbuff.close()
buff.seek(0)
cCtx = lz4f.createCompContext()
header = lz4f.compressBegin(cCtx, prefs)
with __builtin__.open(outname, 'wb') as out:
out.write(header)
while True:
decompData = buff.read((64*(1<<10)))
if not decompData:
break
compData = lz4f.compressUpdate(decompData, cCtx)
out.write(compData)
out.write(lz4f.compressEnd(cCtx))
out.flush()
lz4f.freeCompContext(cCtx)
del tarbuff, buff
def compressTarDefault(dirName, overwrite=None, outname=None):
"""
:type string: dirName - the name of the dir to tar
:type bool: overwrite - overwrite destination
Generic compress method for creating .tar.lz4 from a dir.
***WARNING*** Currently uses StringIO object until lz4file supports write.
Avoid using for large directories, it will consume quite a bit of RAM.
"""
if not outname:
outname = '.'.join([dirName.rstrip('/'), 'tar', 'lz4'])
if not os.path.exists(dirName):
print('Unable to locate the directory to compress.')
return
buff = StringIO()
tarbuff = Lz4Tar.open(fileobj=buff, mode='w|')
tarbuff.add(dirName)
tarbuff.close()
buff.seek(0)
with __builtin__.open(outname, 'wb') as out:
out.write(lz4f.compressFrame(buff.read()))
out.flush()
out.close()
buff.close()
del tarbuff, buff
def openTar(name=None, fileObj=None):
""" Alias for Lz4Tar.open() """
return Lz4Tar.lz4open(name, 'r', fileObj)
def openTar(name=None, fileObj=None):
""" Alias for Lz4Tar.open() """
return Lz4Tar.lz4open(name, 'r', fileObj)
