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#!/usr/bin/env python3
"""
Embed multiple Lua files into a C header file for inclusion in the executable.
Usage: python embed_lua.py <output.h> <file1.lua> [file2.lua] [file3.lua] ...
Embeds all specified Lua files into a C header with a virtual filesystem.
The first file is treated as main.lua (entry point).
"""
import sys
import os
def sanitize_name(filename):
"""Convert filename to valid C identifier"""
name = os.path.basename(filename)
name = name.replace('.', '_').replace('-', '_').replace('/', '_').replace('\\', '_')
return name
def embed_files(output_file, input_files):
with open(output_file, 'w') as f:
f.write('#ifndef EMBEDDED_MAIN_H\n')
f.write('#define EMBEDDED_MAIN_H\n\n')
f.write('/* Auto-generated file - do not edit manually */\n\n')
# Embed each file as a separate array
for idx, input_file in enumerate(input_files):
with open(input_file, 'rb') as inf:
data = inf.read()
var_name = sanitize_name(input_file)
# Get relative path for better module loading
# Try to extract path relative to common directories
relative_name = input_file
for prefix in ['build/', 'build\\']:
if prefix in input_file:
parts = input_file.split(prefix, 1)
if len(parts) > 1:
relative_name = parts[1]
break
f.write(f'/* Embedded file: {relative_name} */\n')
f.write(f'static const unsigned char embedded_lua_{idx}_{var_name}[] = {{\n')
for i, byte in enumerate(data):
if i % 12 == 0:
f.write(' ')
f.write(f'0x{byte:02x}')
if i < len(data) - 1:
f.write(',')
if (i + 1) % 12 == 0:
f.write('\n')
else:
f.write(' ')
f.write('\n};\n')
f.write(f'static const unsigned int embedded_lua_{idx}_{var_name}_len = {len(data)};\n\n')
# Create the file table
f.write('/* File table for virtual filesystem */\n')
f.write('typedef struct {\n')
f.write(' const char* name;\n')
f.write(' const unsigned char* data;\n')
f.write(' unsigned int size;\n')
f.write('} EmbeddedLuaFile;\n\n')
f.write('static const EmbeddedLuaFile embedded_lua_files[] = {\n')
for idx, input_file in enumerate(input_files):
var_name = sanitize_name(input_file)
# Store relative path for proper require() support
relative_name = input_file
for prefix in ['build/', 'build\\']:
if prefix in input_file:
parts = input_file.split(prefix, 1)
if len(parts) > 1:
relative_name = parts[1]
break
# Normalize path separators
relative_name = relative_name.replace('\\', '/')
f.write(f' {{ "{relative_name}", embedded_lua_{idx}_{var_name}, embedded_lua_{idx}_{var_name}_len }},\n')
f.write('};\n\n')
f.write(f'static const int embedded_lua_file_count = {len(input_files)};\n\n')
# Main entry point (first file with 'main.lua' in name, or first file)
main_idx = 0
for idx, input_file in enumerate(input_files):
if 'main.lua' in input_file.lower():
main_idx = idx
break
var_name = sanitize_name(input_files[main_idx])
f.write('/* Main entry point */\n')
f.write(f'#define embedded_main_lua embedded_lua_{main_idx}_{var_name}\n')
f.write(f'#define embedded_main_lua_len embedded_lua_{main_idx}_{var_name}_len\n\n')
f.write('#endif /* EMBEDDED_MAIN_H */\n')
if __name__ == '__main__':
if len(sys.argv) < 3:
print('Usage: python embed_lua.py <output.h> <file1.lua> [file2.lua] ...')
print(' The first Lua file is treated as the main entry point.')
sys.exit(1)
output_file = sys.argv[1]
input_files = sys.argv[2:]
# Check all input files exist
for f in input_files:
if not os.path.exists(f):
print(f'Error: File not found: {f}')
sys.exit(1)
embed_files(output_file, input_files)
print(f'Embedded {len(input_files)} file(s) into {output_file}')
for f in input_files:
print(f' - {f}')
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