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circuitpython/lib/memzip/make-memzip.py

79 lines
2.5 KiB

#!/usr/bin/env python
#
# Takes a directory of files and zips them up (as uncompressed files).
# This then gets converted into a C data structure which can be read
# like a filesystem at runtime.
#
# This is somewhat like frozen modules in python, but allows arbitrary files
# to be used.
from __future__ import print_function
import argparse
import os
import subprocess
import sys
import types
def create_zip(zip_filename, zip_dir):
abs_zip_filename = os.path.abspath(zip_filename)
save_cwd = os.getcwd()
os.chdir(zip_dir)
if os.path.exists(abs_zip_filename):
os.remove(abs_zip_filename)
subprocess.check_call(['zip', '-0', '-r', '-D', abs_zip_filename, '.'])
os.chdir(save_cwd)
def create_c_from_file(c_filename, zip_filename):
with open(zip_filename, 'rb') as zip_file:
with open(c_filename, 'wb') as c_file:
print('#include <stdint.h>', file=c_file)
print('', file=c_file)
print('const uint8_t memzip_data[] = {', file=c_file)
while True:
buf = zip_file.read(16)
if not buf:
break
print(' ', end='', file=c_file)
for byte in buf:
if type(byte) is types.StringType:
print(' 0x{:02x},'.format(ord(byte)), end='', file=c_file)
else:
print(' 0x{:02x},'.format(byte), end='', file=c_file)
print('', file=c_file)
print('};', file=c_file)
def main():
parser = argparse.ArgumentParser(
prog='make-memzip.py',
usage='%(prog)s [options] [command]',
description='Generates a C source memzip file.'
)
parser.add_argument(
'-z', '--zip-file',
dest='zip_filename',
help='Specifies the name of the created zip file.',
default='memzip_files.zip'
)
parser.add_argument(
'-c', '--c-file',
dest='c_filename',
help='Specifies the name of the created C source file.',
default='memzip_files.c'
)
parser.add_argument(
dest='source_dir',
default='memzip_files'
)
args = parser.parse_args(sys.argv[1:])
print('args.zip_filename =', args.zip_filename)
print('args.c_filename =', args.c_filename)
print('args.source_dir =', args.source_dir)
create_zip(args.zip_filename, args.source_dir)
create_c_from_file(args.c_filename, args.zip_filename)
if __name__ == "__main__":
main()