mirror of
https://github.com/gravitational/teleport.git
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50 lines
2.0 KiB
TypeScript
50 lines
2.0 KiB
TypeScript
/**
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* Teleport
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* Copyright (C) 2024 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import type { Plugin } from 'vite';
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/*
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@xterm/addon-image references the bare `WebAssembly` identifier at module scope (via its bundled InWasm helper).
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In environments where WebAssembly is not defined this throws a ReferenceError on import,
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crashing the app. We replace all references with a local shim that either delegates to
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the real WebAssembly or throws a descriptive error, letting us statically import the
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module (no extra chunk) while deferring failure to addon construction time.
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*/
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const shim = `
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const __WASM__ = typeof WebAssembly !== 'undefined' ? WebAssembly : {
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validate: () => false,
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compile() { throw new Error('WebAssembly is not available'); },
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instantiate() { throw new Error('WebAssembly is not available'); },
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Module: class { constructor() { throw new Error('WebAssembly is not available'); } },
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Instance: class { constructor() { throw new Error('WebAssembly is not available'); } },
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Memory: class { constructor() { throw new Error('WebAssembly is not available'); } },
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};
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`;
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export function guardWasmPlugin(): Plugin {
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return {
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name: 'guard-wasm',
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transform(code, id) {
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if (id.includes('@xterm/addon-image')) {
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return shim + '\n' + code.replace(/\bWebAssembly\b/g, '__WASM__');
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}
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},
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};
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}
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