mirror of https://github.com/sveltejs/svelte
Rich Harris
2 years ago
parent
6671dd68f0
commit
45f375a5eb
@ -0,0 +1,7 @@
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## unclosed_element
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%element% was left open
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## unclosed_block
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Block was left open
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@ -0,0 +1,215 @@
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// @ts-check
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import fs from 'node:fs';
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import * as acorn from 'acorn';
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import { walk } from 'zimmerframe';
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import * as esrap from 'esrap';
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const messages = {};
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const seen = new Set();
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for (const category of fs.readdirSync('messages')) {
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messages[category] = {};
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for (const file of fs.readdirSync(`messages/${category}`)) {
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if (!file.endsWith('.md')) continue;
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const markdown = fs.readFileSync(`messages/${category}/${file}`, 'utf-8');
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for (const match of markdown.matchAll(/## ([\w]+)\n\n([^]+?)(?=$|\n\n## )/g)) {
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const [_, code, text] = match;
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if (seen.has(code)) {
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throw new Error(`Duplicate message code ${category}/${code}`);
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}
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seen.add(code);
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messages[category][code] = text.trim();
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}
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}
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}
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function transform(name, dest) {
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const source = fs.readFileSync(new URL(`./templates/${name}.js`, import.meta.url), 'utf-8');
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const comments = [];
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const ast = acorn.parse(source, {
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ecmaVersion: 'latest',
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sourceType: 'module',
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onComment: (block, value, start, end) => {
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if (block && /\n/.test(value)) {
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let a = start;
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while (a > 0 && source[a - 1] !== '\n') a -= 1;
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let b = a;
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while (/[ \t]/.test(source[b])) b += 1;
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const indentation = source.slice(a, b);
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value = value.replace(new RegExp(`^${indentation}`, 'gm'), '');
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}
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comments.push({ type: block ? 'Block' : 'Line', value, start, end });
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}
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});
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walk(ast, null, {
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_(node, { next }) {
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let comment;
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while (comments[0] && comments[0].start < node.start) {
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comment = comments.shift();
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// @ts-expect-error
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(node.leadingComments ||= []).push(comment);
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}
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next();
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if (comments[0]) {
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const slice = source.slice(node.end, comments[0].start);
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if (/^[,) \t]*$/.test(slice)) {
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// @ts-expect-error
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node.trailingComments = [comments.shift()];
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}
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}
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}
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});
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const category = messages[name];
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// find the `export function CODE` node
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const index = ast.body.findIndex((node) => {
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if (
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node.type === 'ExportNamedDeclaration' &&
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node.declaration &&
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node.declaration.type === 'FunctionDeclaration'
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) {
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return node.declaration.id.name === 'CODE';
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}
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});
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if (index === -1) throw new Error(`missing export function CODE in ${name}.js`);
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const template_node = ast.body[index];
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ast.body.splice(index, 1);
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for (const code in category) {
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const message = category[code];
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const vars = [];
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for (const match of message.matchAll(/%(\w+)%/g)) {
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const name = match[1];
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if (!vars.includes(name)) {
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vars.push(match[1]);
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}
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}
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const clone = walk(/** @type {import('estree').Node} */ (template_node), null, {
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// @ts-expect-error Block is a block comment, which is not recognised
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Block(node, context) {
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if (!node.value.includes('PARAMETER')) return;
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const value = node.value
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.split('\n')
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.map((line) => {
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if (line.includes('PARAMETER')) {
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return vars.map((name) => ` * @param {string} ${name}`).join('\n');
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}
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return line;
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})
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.join('\n');
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if (value !== node.value) {
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return { ...node, value };
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}
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},
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FunctionDeclaration(node, context) {
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if (node.id.name !== 'CODE') return;
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const params = [];
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for (const param of node.params) {
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if (param.type === 'Identifier' && param.name === 'PARAMETER') {
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params.push(...vars.map((name) => ({ type: 'Identifier', name })));
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} else {
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params.push(param);
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}
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}
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return /** @type {import('estree').FunctionDeclaration} */ ({
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.../** @type {import('estree').FunctionDeclaration} */ (context.next()),
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params,
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id: {
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...node.id,
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name: code
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}
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});
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},
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Literal(node) {
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if (node.value === 'CODE') {
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return {
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type: 'Literal',
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value: code
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};
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}
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},
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Identifier(node) {
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if (node.name !== 'MESSAGE') return;
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if (/%\w+%/.test(message)) {
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const parts = message.split(/(%\w+%)/);
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/** @type {import('estree').Expression[]} */
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const expressions = [];
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/** @type {import('estree').TemplateElement[]} */
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const quasis = [];
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for (let i = 0; i < parts.length; i += 1) {
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const part = parts[i];
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if (i % 2 === 0) {
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quasis.push({
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type: 'TemplateElement',
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value: {
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raw: part,
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cooked: part
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},
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tail: i === parts.length - 1
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});
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} else {
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expressions.push({
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type: 'Identifier',
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name: part.slice(1, -1)
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});
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}
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}
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return {
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type: 'TemplateLiteral',
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expressions,
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quasis
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};
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}
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return {
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type: 'Literal',
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value: message
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};
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}
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});
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// @ts-expect-error
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ast.body.push(clone);
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}
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// @ts-expect-error
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const module = esrap.print(ast);
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fs.writeFileSync(
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dest,
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`/* This file is generated by scripts/process-messages.js. Do not edit! */\n\n` + module.code,
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'utf-8'
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);
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}
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transform('compile-errors', 'src/compiler/errors.js');
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@ -0,0 +1,74 @@
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/** @typedef {{ start?: number, end?: number }} NodeLike */
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// interface is duplicated between here (used internally) and ./interfaces.js
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// (exposed publicly), and I'm not sure how to avoid that
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export class CompileError extends Error {
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name = 'CompileError';
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/** @type {import('#compiler').CompileError['filename']} */
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filename = undefined;
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/** @type {import('#compiler').CompileError['position']} */
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position = undefined;
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/** @type {import('#compiler').CompileError['start']} */
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start = undefined;
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/** @type {import('#compiler').CompileError['end']} */
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end = undefined;
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/**
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*
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* @param {string} code
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* @param {string} message
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* @param {[number, number] | undefined} position
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*/
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constructor(code, message, position) {
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super(message);
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this.code = code;
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this.position = position;
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}
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toString() {
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let out = `${this.name}: ${this.message}`;
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out += `\n(${this.code})`;
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if (this.filename) {
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out += `\n${this.filename}`;
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if (this.start) {
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out += `${this.start.line}:${this.start.column}`;
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}
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}
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return out;
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}
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}
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/**
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*
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* @param {number | NodeLike} node
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* @param {string} code
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* @param {string} message
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* @returns {never}
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*/
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function __error(node, code, message) {
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const start = typeof node === 'number' ? node : node?.start;
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const end = typeof node === 'number' ? node : node?.end;
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throw new CompileError(
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code,
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message,
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start !== undefined && end !== undefined ? [start, end] : undefined
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);
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}
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/**
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* @param {number | NodeLike} node
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* @param {string} PARAMETER
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* @returns {never}
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*/
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export function CODE(node, PARAMETER) {
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__error(node, 'CODE', MESSAGE);
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}
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@ -0,0 +1,76 @@
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/* This file is generated by scripts/process-messages.js. Do not edit! */
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/** @typedef {{ start?: number, end?: number }} NodeLike */
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// interface is duplicated between here (used internally) and ./interfaces.js
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// (exposed publicly), and I'm not sure how to avoid that
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export class CompileError extends Error {
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name = 'CompileError';
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/** @type {import('#compiler').CompileError['filename']} */
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filename = undefined;
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/** @type {import('#compiler').CompileError['position']} */
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position = undefined;
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/** @type {import('#compiler').CompileError['start']} */
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start = undefined;
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/** @type {import('#compiler').CompileError['end']} */
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end = undefined;
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/**
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*
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* @param {string} code
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* @param {string} message
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* @param {[number, number] | undefined} position
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*/
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constructor(code, message, position) {
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super(message);
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this.code = code;
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this.position = position;
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}
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toString() {
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let out = `${this.name}: ${this.message}`;
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out += `\n(${this.code})`;
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if (this.filename) {
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out += `\n${this.filename}`;
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if (this.start) {
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out += `${this.start.line}:${this.start.column}`;
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}
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}
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return out;
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}
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}
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/**
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*
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* @param {number | NodeLike} node
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* @param {string} code
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* @param {string} message
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* @returns {never}
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*/
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function __error(node, code, message) {
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const start = typeof node === 'number' ? node : node?.start;
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const end = typeof node === 'number' ? node : node?.end;
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throw new CompileError(code, message, start !== undefined && end !== undefined ? [start, end] : undefined);
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}
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/**
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* @param {number | NodeLike} node
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* @param {string} element
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* @returns {never}
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*/
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export function unclosed_element(node, element) {
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__error(node, "unclosed_element", `${element} was left open`);
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}
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/**
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* @param {number | NodeLike} node
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* @returns {never}
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*/
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export function unclosed_block(node) {
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__error(node, "unclosed_block", "Block was left open");
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}
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