Diffusion Ant (feature/nursery) Code

ant/src/tools/gen_snapshot.js
ddfe6237cab5feature/nursery

gen_snapshot.js
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			import * as esbuild from 'esbuild';
			import { writeFileSync } from 'node:fs';

			function generateHeader(inputFile, bytes) {
			const lines = [];
			for (let i = 0; i < bytes.length; i += 16) {
			lines.push(' ' + bytes.slice(i, i + 16).join(', '));
			}

			return `/* Auto-generated snapshot from ${inputFile} */
			/* DO NOT EDIT - Generated during build */

			#ifndef ANT_SNAPSHOT_DATA_H
			#define ANT_SNAPSHOT_DATA_H

			#include <stddef.h>
			#include <stdint.h>

			static const uint8_t ant_snapshot_source[] = {
			${lines.join(',\n')}
			};

			/* bundled source size: ${bytes.length} bytes */
			static const size_t ant_snapshot_source_len = ${bytes.length};

			#endif /* ANT_SNAPSHOT_DATA_H */
			`;
			}

			async function main() {
			const args = process.argv.slice(2);

			if (args.length < 2) {
			console.error(`Usage: ${process.argv[1]} <input.js> <output.h> [KEY=value...]`);
			console.error(`Example: ${process.argv[1]} core.js snapshot.h VERSION=1.0.0 GIT_HASH=abc123`);
			process.exit(1);
			}

			const [inputFile, outputFile, ...rawArgs] = args;

			const replacements = rawArgs.reduce((acc, arg) => {
			const pivot = arg.indexOf('=');
			if (pivot === -1) return acc;
			const key = arg.slice(0, pivot);
			let value = arg.slice(pivot + 1);

			if (value === 'true') value = true;
			else if (value === 'false') value = false;

			acc[`import.meta.env.${key}`] = JSON.stringify(value);
			return acc;
			}, {});

			const result = await esbuild.build({
			minify: true,
			bundle: true,
			write: false,
			format: 'esm',
			define: replacements,
			entryPoints: [inputFile]
			});

			const minified = result.outputFiles[0].contents;
			console.log(new TextDecoder().decode(minified));

			const header = generateHeader(inputFile, minified);
			writeFileSync(outputFile, header);

			console.log(`snapshot generated successfully: ${outputFile}`);
			console.log(` bundled size: ${minified.length} bytes`);
			console.log(` replacements: ${Object.keys(replacements).length}`);
			}

			main().catch(err => {
			console.error(err);
			process.exit(1);
			});

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