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@ -103,6 +103,8 @@ export function show_output(cwd, options = {}) {
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const svelte_path = fileURLToPath(new URL('..', import.meta.url)).replace(/\\/g, '/');
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const AsyncFunction = /** @type {typeof Function} */ (async function () {}.constructor);
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export function create_loader(compileOptions, cwd) {
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const cache = new Map();
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@ -110,46 +112,100 @@ export function create_loader(compileOptions, cwd) {
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if (cache.has(file)) return cache.get(file);
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if (file.endsWith('.svelte')) {
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const options = {
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...compileOptions,
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filename: file
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};
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const compiled = compile(
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// Windows/Linux newline conversion
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fs.readFileSync(file, 'utf-8').replace(/\r\n/g, '\n'),
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{
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...compileOptions,
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filename: file
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}
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options
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);
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const imports = new Map();
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const __import = (id) => {
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let resolved = id;
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for (const match of compiled.js.code.matchAll(/require\("(.+?)"\)/g)) {
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const source = match[1];
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let resolved = source;
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if (source.startsWith('.')) {
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resolved = path.resolve(path.dirname(file), source);
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if (id.startsWith('.')) {
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resolved = path.resolve(path.dirname(file), id);
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}
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if (source === 'svelte') {
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if (id === 'svelte') {
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resolved = `${svelte_path}src/runtime/index.js`;
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}
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if (source.startsWith('svelte/')) {
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resolved = `${svelte_path}src/runtime/${source.slice(7)}/index.js`;
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if (id.startsWith('svelte/')) {
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resolved = `${svelte_path}src/runtime/${id.slice(7)}/index.js`;
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}
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imports.set(source, await load(resolved));
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}
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function require(id) {
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return imports.get(id);
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return load(resolved);
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};
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const exports = [];
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// We can't use Node's or Vitest's loaders cause we compile with different options.
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// We need to rewrite the imports into function calls that we can intercept to transform
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// any imported Svelte components as well. A few edge cases aren't handled but also
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// currently unused in the tests, for example `export * from`and live bindings.
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let transformed = compiled.js.code
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.replace(
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/^import \* as (\w+) from ['"]([^'"]+)['"];?/gm,
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'const $1 = await __import("$2");'
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)
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.replace(
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/^import (\w+) from ['"]([^'"]+)['"];?/gm,
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'const {default: $1} = await __import("$2");'
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)
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.replace(
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/^import (\w+, )?{([^}]+)} from ['"](.+)['"];?/gm,
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(_, default_, names, source) => {
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const d = default_ ? `default: ${default_}` : '';
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return `const { ${d} ${names.replaceAll(
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' as ',
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': '
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)} } = await __import("${source}");`;
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}
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)
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.replace(/^export default /gm, '__exports.default = ')
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.replace(
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/^export (const|let|var|class|function|async\s+function) (\w+)/gm,
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(_, type, name) => {
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exports.push(name);
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return `${type} ${name}`;
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}
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)
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.replace(/^export \{([^}]+)\}(?: from ['"]([^'"]+)['"];?)?/gm, (_, names, source) => {
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const entries = names.split(',').map((name) => {
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const match = name.trim().match(/^(\w+)( as (\w+))?$/);
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const i = match[1];
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const o = match[3] || i;
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return [o, i];
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});
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return source
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? `{ const __mod = await __import("${source}"); ${entries
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.map(([o, i]) => `__exports.${o} = __mod.${i};`)
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.join('\n')}}`
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: `{ ${entries.map(([o, i]) => `__exports.${o} = ${i};`).join('\n')} }`;
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});
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exports.forEach((name) => {
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transformed += `\n__exports.${name} = ${name};`;
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});
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const __exports = {
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[Symbol.toStringTag]: 'Module'
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};
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try {
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const fn = new AsyncFunction('__import', '__exports', transformed);
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await fn(__import, __exports);
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} catch (err) {
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console.error({ transformed }); // eslint-disable-line no-console
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throw err;
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}
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const fn = new Function('require', 'exports', 'module', compiled.js.code);
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const module = { exports: {} };
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fn(require, module.exports, module);
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cache.set(file, module.exports);
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return module.exports;
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cache.set(file, __exports);
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return __exports;
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} else {
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return import(file);
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}
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gtmnayan
1 year ago
committed by
GitHub