mozlz4 python utils

mozlz4-compress.py

#!/usr/bin/env python
import io
import sys

import lz4.block

MAGIC = b'mozLz40\0'

for path in sys.argv[1:]:
    dest_path = f'{path}.lz4'
    print(f'Compressing {path} to {dest_path}')
    with io.open(path,'rb') as fsrc:
        data = fsrc.read()
        with io.open(f'{path}.lz4', 'wb') as fdst:
            fdst.write(MAGIC)
            fdst.write(lz4.block.compress(data))

mozlz4-decompress.py

#!/usr/bin/env python
import io
import sys

import lz4.block

MAGIC = b'mozLz40\0'

for path in sys.argv[1:]:
    with io.open(path, 'rb') as f:
        magic = f.read(len(MAGIC))
        if magic != MAGIC:
            raise Exception('Bad magic number')
        print(lz4.block.decompress(f.read()).decode("utf-8"))