flatten-sfz.js - resolve #include paths in .sfz and make sfz files loadable on SFZ tools that do not support ARIA extensions.

flatten-sfz.js

const fs = require('fs');
const path = require('path');

main();

function main() {

	var args = process.argv.slice(2);

	var sfzDirPath = args.length == 0 ? process.cwd() : args[0];

	console.log("Path: " + sfzDirPath);

	var dir = fs.opendirSync(sfzDirPath);

	var ent = null;
	while ((ent = dir.readSync()) != null) {
		console.log(ent);
		if (ent.isFile && ent.name.toLowerCase().endsWith(".sfz") && !ent.name.endsWith(".flatten.sfz")) {
			var fileRooted = path.join(sfzDirPath, ent.name);
			var content = readSfzFlatten(fileRooted);
			fs.writeFileSync(fileRooted.substring(0, fileRooted.length - 4) + ".flatten.sfz", content);
		}
	}
}

function readSfzFlatten(filePath)
{
	var sfz = fs.readFileSync(filePath);

	var result = "";
	var lines = sfz.toString().split('\n');
	for (var line in lines) {
		var s = lines [line];
		var iLen = "#include".length;
		if (s.startsWith("#include")) {
			if (s.length <= iLen || (s[iLen] != ' ' && s[iLen] != '\t')) {
				console.log ("Illegal inclusion specifier at line " + (line + 1));
				continue;
			}
			var includeSpec = s.substring ("#include".length + 1).trim();
			if (includeSpec.length < 2 || includeSpec[0] != '"' || includeSpec[includeSpec.length - 1] != '"') {
				console.log ("Illegal inclusion specifier at line " + (line + 1));
				continue;
			}
			includeSpec = includeSpec.substring(1, includeSpec.length - 1);
			console.log("Include: " + includeSpec);
			var includePath = path.join(path.dirname(filePath), includeSpec);
			result += readSfzFlatten(includePath);
		} else
			result += s;
	}
	return result;
}