277 lines
9.5 KiB
JavaScript
277 lines
9.5 KiB
JavaScript
const fs = require('fs/promises');
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const path = require('path');
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const { inspect } = require('util');
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const chalk = require('chalk');
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const declarationsPath = path.resolve(__dirname, './isaac-typescript-definitions/typings/');
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const outPath = path.resolve(__dirname, './out/');
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let classes = {};
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let tsToLuaTypes = {
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undefined: 'nil',
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unknown: 'any',
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}
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function transpileType(type) {
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if (!type) return 'what';
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type = type.trim();
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if (type.startsWith('(') && type.endsWith(')')) type = type.slice(1, -1);
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if (tsToLuaTypes[type]) {
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return tsToLuaTypes[type];
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}
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if (type.endsWith('[]')) {
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return transpileType(type.slice(0, -2)) + '[]';
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}
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if (type.includes('|')) {
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return type.split('|').map(t => transpileType(t)).join(' | ');
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}
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if (type.startsWith('"')) {
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return 'string';
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}
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if (type.startsWith('Record<') && type.endsWith('>')) {
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return 'table<' + transpileType(type.split(',')[0].replace('Record<','')) + ', ' + transpileType(type.split(',')[1].replace('>','')) + '>';
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}
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if (type.startsWith('LuaTable<') && type.endsWith('>')) {
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return 'table<' + transpileType(type.split(',')[0].replace('LuaTable<','')) + ', ' + transpileType(type.split(',')[1].replace('>','')) + '>';
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}
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let match;
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if (match = /\((.*?)\) ?=> ?(.*)/.exec(type)) { // functions
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return `fun(${match[1] !== '' ? match[1].split(',').map(c => c.split(':')[0] + ':' + transpileType(c.split(':')[1])).join(',') : ''}): ${transpileType(match[2])}`;
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}
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if (match = /(?:Array)|(?:Map)<(.*?)>/.exec(type)) {
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return transpileType(match[1]) + '[]';
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}
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if (match = /(.*?)<(.*?)>/.exec(type)) { // any other weird type we just discard
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return transpileType(match[2]);
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}
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return type;
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}
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function transpile(parsed, indent, prefix) {
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let global = false;
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indent = indent || 0;
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const type = parsed[0];
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const d = parsed[1];
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let n = '\n' + ' '.repeat(indent); // newline
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switch (type) {
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case 'namespace':
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global = true;
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case 'interface':
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let contents = d.contents;
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if (d.extends) {
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if (classes[d.extends]) {
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contents.push(...classes[d.extends]);
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} else {
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throw new Error(`Class not found in class storage: ${d.extends}`)
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}
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}
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classes[d.name] = contents;
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return `---@class ${d.name}${n}${contents.filter(e => e[0] === 'const').map(c => `---@field public ${c[1].name} ${transpileType(c[1].type)}${n}`).join('')}${global ? '' : '__class_'}${d.name} = {}${n}${contents.filter(e => e[0] !== 'const').map(c => transpile(c, indent, `${global ? '' : '__class_'}${d.name}`)).join(n)}\n`;
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case 'function':
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return `${d.arguments.map(p => `---@param ${p.name.replace('?', '')} ${transpileType(p.type)}${n}`).join('')}---@return ${transpileType(d.returns)}${n}function ${prefix ? prefix + ':' : ''}${d.name}(${d.arguments.map(a => a.name.replace('?', '')).join(', ')}) end`;
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case 'const':
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return `---@type ${transpileType(d.type)}${n}${prefix ? prefix + '.' : ''}${d.name} = nil`;
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case 'enum':
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return `${prefix ? prefix + '.' : ''}${d.name} = {${n} ${d.contents.map(c => `${c.name} = ${c.value}`).join(`,${n} `)}${n}}`;
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}
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return '';
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}
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function removeComments(code) {
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// remove /* */ style comments, for now
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code = code.replace(/\/\*(.*?)\*\//gs, '');
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code = code.split('\n').filter(c => !c.trim().startsWith('//')).join('\n');
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return code;
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}
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let parsedElements = 0;
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/**
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* @param {string} code
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*/
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function parse(code) {
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// console.log(code);
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// we're left with code containing "declare" statements
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// other code will pass stuff in here recursively, but the declare doesnt _really_ matter
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// were gonna end up with an ast of sorts anyways as a result, which we can then use instead of declares
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// sanitize stuff
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code = removeComments(code);
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let match;
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let elements = [];
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// look for interfaces
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let interfaceFreeCode = code;
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const interface = /interface (\w+)(?: extends (\w+))? ?{([^}]*)}/g;
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while ((match = interface.exec(code)) !== null) {
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parsedElements++;
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interfaceFreeCode = interfaceFreeCode.replace(match[0], '');
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elements.push(['interface', {name: match[1], extends: match[2], contents: parse(match[3])}]);
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}
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code = interfaceFreeCode;
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// look for namespaces
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let namespaceFreeCode = code;
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const namespace = /namespace (\w+) ?{([^}]*)}/g;
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while ((match = namespace.exec(code)) !== null) {
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parsedElements++;
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namespaceFreeCode = namespaceFreeCode.replace(match[0], '');
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elements.push(['namespace', {name: match[1], contents: parse(match[2])}]);
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}
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code = namespaceFreeCode;
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// look for functions
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let functionFreeCode = code;
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const functions = /(function)?\s(\w+)\s*\(([^;]*)\)(\s*:\s*([\w\[\]\s|<>,]+))?/g; // wow this sucks
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while ((match = functions.exec(code)) !== null) {
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parsedElements++;
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functionFreeCode = functionFreeCode.replace(match[0], '');
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let arguments = match[3].split(',').map(s => {
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const split = s.split(':').map(s => s.trim());
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return {type: split[1], name: split[0]}
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}).filter(c => c.type && c.name);
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elements.push(['function', {name: match[2], arguments: arguments, returns: match[5]}]);
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}
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code = functionFreeCode;
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// looks for enums
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let enumFreeCode = code;
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const enums = /enum (\w+) ?{([^}]*)}/g;
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while ((match = enums.exec(code)) !== null) {
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parsedElements++;
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enumFreeCode = enumFreeCode.replace(match[0], '');
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elements.push(['enum', {name: match[1], contents: match[2].split(',').filter(c => c.split('=').length === 2).map(c => {return {name: c.split('=')[0].trim(), value: c.split('=')[1].trim()}})}]);
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}
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code = enumFreeCode;
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// looks for constants / properties
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let constFreeCode = code;
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const consts = /(\w+)\s*:\s*(\w+)/g;
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while ((match = consts.exec(code)) !== null) {
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parsedElements++;
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constFreeCode = constFreeCode.replace(match[0], '');
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elements.push(['const', {name: match[1], type: match[2]}]);
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}
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code = constFreeCode;
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elements = elements.sort((a, b) => b[1].extends ? 1 : 0 - a[1].extends ? 1 : 0).reverse(); // for extending bullshit
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return elements;
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}
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async function recursiveReaddir(rpath, p, fileNames) {
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p = p || '';
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fileNames = (fileNames || []).slice();
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const files = await fs.readdir(rpath);
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for (const f of files) {
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const stat = await fs.lstat(path.join(rpath, f));
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if (stat.isDirectory() || stat.isSymbolicLink()) {
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fileNames.push(...await recursiveReaddir(path.join(rpath, f), p + f + '/', fileNames));
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} else {
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fileNames.push(p + f);
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}
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}
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return fileNames;
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}
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(async () => {
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let timeParsing = 0;
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let timeTotal = 0;
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try {
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const d = await fs.lstat(outPath)
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if (!d.isDirectory()) throw new Error(`${outPath} exists, and isn't a directory!`);
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} catch(err) {
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if (err.code === 'ENOENT') {
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await fs.mkdir(outPath);
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} else {
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console.error(err);
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process.exit();
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}
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}
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let errored = [];
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let errorReason = {};
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const files = await recursiveReaddir(declarationsPath);
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const filesAmt = files.length;
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let i = 0;
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for (const f of files) {
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i++;
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const filePath = path.resolve(declarationsPath, f);
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console.log(` ${chalk.cyanBright(f)}`);
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const file = await fs.readFile(filePath, 'utf8');
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let startParse = Date.now();
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parsedElements = 0;
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const parsed = parse(file);
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console.log(` parsed ${chalk.magentaBright(parsedElements)} objects from ${chalk.cyanBright(f)}`);
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timeParsing += Date.now() - startParse;
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if (parsed.length === 0) {
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console.log(`${chalk.redBright('!')} no elements parsed, ${chalk.gray('not writing anything')}`);
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continue;
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}
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if (parsed.length > 10) {
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console.log(`${chalk.redBright('!')} over 10 top-level objects were parsed - this may be a bad idea`);
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}
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let transpiled;
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try {
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transpiled = parsed.map(p => transpile(p)).join('\n').trim();
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errored = errored.filter(e => e !== f);
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} catch(err) {
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errorReason[f] = err;
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if (errored.length > files.length - i) {
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console.error(`${chalk.redBright('!')} failed resolving extends!`);
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errored = [...new Set(errored)];
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console.error(`${chalk.redBright('!')} abandoned ${chalk.magentaBright(errored.length)} files:`);
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let longest = errored.reduce((a, b) => Math.max(a.length || a || 0, b.length));
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errored.forEach(e => console.error(` - ${chalk.cyanBright(e)}${' '.repeat(longest - e.length + 2)}${chalk.gray(' → ' + errorReason[e].message.replace('Class not found in class storage: ', ''))}`));
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break;
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}
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console.error(`${chalk.yellowBright('!')} ${err}`);
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console.error(`${chalk.yellowBright('!')} pushing to end of queue`);
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files.push(f);
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errored.push(f);
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timeTotal += Date.now() - startParse;
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continue;
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}
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console.log(` transpiled w/ final length of ${chalk.magentaBright(transpiled.length + ' chars')}`);
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timeTotal += Date.now() - startParse;
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if (transpiled.length === 0) {
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console.log(`${chalk.redBright('!')} nothing transpiled, ${chalk.gray('not writing anything')}`);
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continue;
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}
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//console.log(inspect(parsed, false, 10));
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const luaFilename = f.replace('.d.ts', '.lua').split('/').pop();
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await fs.writeFile(path.resolve(outPath, luaFilename), transpiled);
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console.log(` wrote ${chalk.cyanBright(luaFilename)}`);
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}
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console.log(`\nfinished transpiling ${chalk.magentaBright(filesAmt)} ${chalk.gray(`+ ${files.length - filesAmt}`)} files in ${chalk.magentaBright(timeTotal + 'ms')} ${chalk.gray(`(${Math.floor(timeParsing/timeTotal * 1000 + 0.5) / 10}% spent parsing)`)}`);
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console.log(`check ${chalk.cyanBright(outPath)}`);
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})(); |