snowpack
Version:
The ESM-powered frontend build tool. Fast, lightweight, unbundled.
83 lines (82 loc) • 3.32 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (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 (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.esbuildPlugin = void 0;
const esbuild = __importStar(require("esbuild"));
const colors = __importStar(require("kleur/colors"));
const path_1 = __importDefault(require("path"));
const fs_1 = require("fs");
const logger_1 = require("../logger");
const IS_PREACT = /from\s+['"]preact['"]/;
function checkIsPreact(contents) {
return IS_PREACT.test(contents);
}
function getLoader(filePath) {
const ext = path_1.default.extname(filePath);
const loader = ext === '.mjs' ? 'js' : ext.substr(1);
const isJSX = loader.endsWith('x');
return { loader, isJSX };
}
function esbuildPlugin(config, { input }) {
return {
name: '@snowpack/plugin-esbuild',
resolve: {
input,
output: ['.js'],
},
async load({ filePath }) {
var _a, _b;
let contents = await fs_1.promises.readFile(filePath, 'utf8');
const { loader, isJSX } = getLoader(filePath);
if (isJSX) {
const jsxInject = config.buildOptions.jsxInject ? `${config.buildOptions.jsxInject}\n` : '';
contents = jsxInject + contents;
}
const isPreact = isJSX && checkIsPreact(contents);
let jsxFactory = (_a = config.buildOptions.jsxFactory) !== null && _a !== void 0 ? _a : (isPreact ? 'h' : undefined);
let jsxFragment = (_b = config.buildOptions.jsxFragment) !== null && _b !== void 0 ? _b : (isPreact ? 'Fragment' : undefined);
const { code, map, warnings } = await esbuild.transform(contents, {
loader: loader,
jsxFactory,
jsxFragment,
sourcefile: filePath,
sourcemap: config.buildOptions.sourcemap && 'inline',
charset: 'utf8',
sourcesContent: config.mode !== 'production',
});
for (const warning of warnings) {
logger_1.logger.error(`${colors.bold('!')} ${filePath}
${warning.text}`);
}
return {
'.js': {
code: code || '',
map,
},
};
},
cleanup() { },
};
}
exports.esbuildPlugin = esbuildPlugin;