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#!/usr/bin/env python3
import os
import argparse
import sys
import filecmp
def replace_if_changed(new, old):
'''
Compare contents and only replace if changed to avoid triggering a rebuild.
'''
try:
changed = not filecmp.cmp(new, old, shallow=False)
except FileNotFoundError:
changed = True
if changed:
os.replace(new, old)
else:
os.remove(new)
parser = argparse.ArgumentParser()
parser.add_argument('--array-name', help='The name of the array variable')
parser.add_argument('--output', metavar='STRING', help='Output filename',
default=None)
parser.add_argument('input', metavar='FILE', help='The input file',
type=argparse.FileType('r'))
args = parser.parse_args()
if args.output is None:
output = sys.stdout
else:
output = args.output + '~'
with open(output, 'w') as f:
f.write('static const char {}[] = {{\n'.format(args.array_name))
for line in args.input:
for ch in line:
f.write(' 0x{:02x},\n'.format(ord(ch)))
f.write('};')
if args.output is not None:
replace_if_changed(output, args.output)
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