typescript-to-lua
Version:
A generic TypeScript to Lua transpiler. Write your code in TypeScript and publish Lua!
208 lines • 9.37 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.stripParenthesisExpressionsTransformer = exports.noImplicitSelfTransformer = void 0;
exports.getTransformers = getTransformers;
const ts = __importStar(require("typescript"));
// TODO: Don't depend on CLI?
const cliDiagnostics = __importStar(require("../cli/diagnostics"));
const diagnosticFactories = __importStar(require("./diagnostics"));
const utils_1 = require("./utils");
function getTransformers(program, diagnostics, customTransformers, onSourceFile) {
var _a, _b, _c, _d, _e, _f;
const luaTransformer = () => sourceFile => {
onSourceFile(sourceFile);
return ts.createSourceFile(sourceFile.fileName, "", ts.ScriptTarget.ESNext);
};
const transformersFromOptions = loadTransformersFromOptions(program, diagnostics);
const afterDeclarations = [
...((_a = transformersFromOptions.afterDeclarations) !== null && _a !== void 0 ? _a : []),
...((_b = customTransformers.afterDeclarations) !== null && _b !== void 0 ? _b : []),
];
const options = program.getCompilerOptions();
if (options.noImplicitSelf) {
afterDeclarations.unshift(exports.noImplicitSelfTransformer);
}
return {
afterDeclarations,
before: [
...((_c = customTransformers.before) !== null && _c !== void 0 ? _c : []),
...((_d = transformersFromOptions.before) !== null && _d !== void 0 ? _d : []),
...((_e = transformersFromOptions.after) !== null && _e !== void 0 ? _e : []),
...((_f = customTransformers.after) !== null && _f !== void 0 ? _f : []),
exports.stripParenthesisExpressionsTransformer,
luaTransformer,
],
};
}
const noImplicitSelfTransformer = () => node => {
const transformSourceFile = node => {
const empty = ts.factory.createNotEmittedStatement(undefined);
ts.addSyntheticLeadingComment(empty, ts.SyntaxKind.MultiLineCommentTrivia, "* @noSelfInFile ", true);
return ts.factory.updateSourceFile(node, [empty, ...node.statements], node.isDeclarationFile);
};
return ts.isBundle(node)
? ts.factory.updateBundle(node, node.sourceFiles.map(transformSourceFile))
: transformSourceFile(node);
};
exports.noImplicitSelfTransformer = noImplicitSelfTransformer;
const stripParenthesisExpressionsTransformer = context => sourceFile => {
// Remove parenthesis expressions before transforming to Lua, so transpiler is not hindered by extra ParenthesizedExpression nodes
function unwrapParentheses(node) {
while (ts.isParenthesizedExpression(node) && !ts.isOptionalChain(node.expression)) {
node = node.expression;
}
return node;
}
function visit(node) {
// For now only call expressions strip their expressions of parentheses, there could be more cases where this is required
if (ts.isCallExpression(node)) {
return ts.factory.updateCallExpression(node, unwrapParentheses(node.expression), node.typeArguments, node.arguments);
}
else if (ts.isVoidExpression(node)) {
return ts.factory.updateVoidExpression(node, unwrapParentheses(node.expression));
}
else if (ts.isDeleteExpression(node)) {
return ts.factory.updateDeleteExpression(node, unwrapParentheses(node.expression));
}
return ts.visitEachChild(node, visit, context);
}
return ts.visitEachChild(sourceFile, visit, context);
};
exports.stripParenthesisExpressionsTransformer = stripParenthesisExpressionsTransformer;
function loadTransformersFromOptions(program, diagnostics) {
const customTransformers = {
before: [],
after: [],
afterDeclarations: [],
};
const options = program.getCompilerOptions();
if (options.plugins) {
for (const [index, transformerImport] of options.plugins.entries()) {
if (!("transform" in transformerImport))
continue;
const optionName = `compilerOptions.plugins[${index}]`;
const { error: resolveError, result: factory } = (0, utils_1.resolvePlugin)("transformer", `${optionName}.transform`, (0, utils_1.getConfigDirectory)(options), transformerImport.transform, transformerImport.import);
if (resolveError)
diagnostics.push(resolveError);
if (factory === undefined)
continue;
const { error: loadError, transformer } = loadTransformer(optionName, program, factory, transformerImport);
if (loadError)
diagnostics.push(loadError);
if (transformer === undefined)
continue;
if (transformer.before) {
customTransformers.before.push(transformer.before);
}
if (transformer.after) {
customTransformers.after.push(transformer.after);
}
if (transformer.afterDeclarations) {
customTransformers.afterDeclarations.push(transformer.afterDeclarations);
}
}
}
if (options.jsx === ts.JsxEmit.React) {
customTransformers.before.push(context => {
// if target < ES2017, typescript generates some unnecessary additional transformations in transformJSX.
// We can't control the target compiler option, so we override here.
const patchedContext = {
...context,
getCompilerOptions: () => ({
...context.getCompilerOptions(),
target: ts.ScriptTarget.ESNext,
}),
};
return ts.transformJsx(patchedContext);
});
}
return customTransformers;
}
function loadTransformer(optionPath, program, factory, { transform, after = false, afterDeclarations = false, type = "program", ...extraOptions }) {
var _a, _b;
let transformer;
switch (type) {
case "program":
transformer = factory(program, extraOptions);
break;
case "config":
transformer = factory(extraOptions);
break;
case "checker":
transformer = factory(program.getTypeChecker(), extraOptions);
break;
case "raw":
transformer = factory;
break;
case "compilerOptions":
transformer = factory(program.getCompilerOptions(), extraOptions);
break;
default: {
const optionName = `--${optionPath}.type`;
return { error: cliDiagnostics.argumentForOptionMustBe(optionName, "program") };
}
}
if (typeof after !== "boolean") {
const optionName = `${optionPath}.after`;
return { error: cliDiagnostics.compilerOptionRequiresAValueOfType(optionName, "boolean") };
}
if (typeof afterDeclarations !== "boolean") {
const optionName = `${optionPath}.afterDeclarations`;
return { error: cliDiagnostics.compilerOptionRequiresAValueOfType(optionName, "boolean") };
}
if (typeof transformer === "function") {
let wrappedTransformer;
if (after) {
wrappedTransformer = { after: transformer };
}
else if (afterDeclarations) {
wrappedTransformer = { afterDeclarations: transformer };
}
else {
wrappedTransformer = { before: transformer };
}
return { transformer: wrappedTransformer };
}
else {
const isValidGroupTransformer = typeof transformer === "object" &&
((_b = (_a = transformer.before) !== null && _a !== void 0 ? _a : transformer.after) !== null && _b !== void 0 ? _b : transformer.afterDeclarations) !== undefined;
if (!isValidGroupTransformer) {
return { error: diagnosticFactories.transformerShouldBeATsTransformerFactory(transform) };
}
}
return { transformer };
}
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