declare module 'wasi' {
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interface WASIOptions {
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/**
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* An array of strings that the WebAssembly application will
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* see as command line arguments. The first argument is the virtual path to the
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* WASI command itself.
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*/
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args?: string[];
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/**
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* An object similar to `process.env` that the WebAssembly
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* application will see as its environment.
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*/
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env?: object;
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/**
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* This object represents the WebAssembly application's
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* sandbox directory structure. The string keys of `preopens` are treated as
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* directories within the sandbox. The corresponding values in `preopens` are
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* the real paths to those directories on the host machine.
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*/
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preopens?: NodeJS.Dict<string>;
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/**
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* By default, WASI applications terminate the Node.js
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* process via the `__wasi_proc_exit()` function. Setting this option to `true`
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* causes `wasi.start()` to return the exit code rather than terminate the
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* process.
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* @default false
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*/
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returnOnExit?: boolean;
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}
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class WASI {
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constructor(options?: WASIOptions);
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/**
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*
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* Attempt to begin execution of `instance` by invoking its `_start()` export.
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* If `instance` does not contain a `_start()` export, then `start()` attempts to
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* invoke the `__wasi_unstable_reactor_start()` export. If neither of those exports
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* is present on `instance`, then `start()` does nothing.
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*
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* `start()` requires that `instance` exports a [`WebAssembly.Memory`][] named
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* `memory`. If `instance` does not have a `memory` export an exception is thrown.
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*/
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start(instance: object): void; // TODO: avoid DOM dependency until WASM moved to own lib.
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/**
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* Is an object that implements the WASI system call API. This object
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* should be passed as the `wasi_snapshot_preview1` import during the instantiation of a
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* [`WebAssembly.Instance`][].
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*/
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readonly wasiImport: NodeJS.Dict<any>; // TODO: Narrow to DOM types
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}
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}
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