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666 lines
19 KiB
666 lines
19 KiB
// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
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// SPDX-License-Identifier: Apache-2.0
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// SPDX-License-Identifier: MIT
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/**
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* Access the system shell.
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* Allows you to spawn child processes and manage files and URLs using their default application.
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*
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* ## Security
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*
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* This API has a scope configuration that forces you to restrict the programs and arguments that can be used.
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*
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* ### Restricting access to the {@link open | `open`} API
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*
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* On the configuration object, `open: true` means that the {@link open} API can be used with any URL,
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* as the argument is validated with the `^((mailto:\w+)|(tel:\w+)|(https?://\w+)).+` regex.
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* You can change that regex by changing the boolean value to a string, e.g. `open: ^https://github.com/`.
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*
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* ### Restricting access to the {@link Command | `Command`} APIs
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*
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* The plugin configuration object has a `scope` field that defines an array of CLIs that can be used.
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* Each CLI is a configuration object `{ name: string, cmd: string, sidecar?: bool, args?: boolean | Arg[] }`.
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*
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* - `name`: the unique identifier of the command, passed to the {@link Command.create | Command.create function}.
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* If it's a sidecar, this must be the value defined on `tauri.conf.json > tauri > bundle > externalBin`.
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* - `cmd`: the program that is executed on this configuration. If it's a sidecar, this value is ignored.
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* - `sidecar`: whether the object configures a sidecar or a system program.
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* - `args`: the arguments that can be passed to the program. By default no arguments are allowed.
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* - `true` means that any argument list is allowed.
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* - `false` means that no arguments are allowed.
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* - otherwise an array can be configured. Each item is either a string representing the fixed argument value
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* or a `{ validator: string }` that defines a regex validating the argument value.
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*
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* #### Example scope configuration
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*
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* CLI: `git commit -m "the commit message"`
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*
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* Configuration:
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* ```json
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* {
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* "plugins": {
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* "shell": {
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* "scope": [
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* {
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* "name": "run-git-commit",
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* "cmd": "git",
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* "args": ["commit", "-m", { "validator": "\\S+" }]
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* }
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* ]
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* }
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* }
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* }
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* ```
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* Usage:
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* ```typescript
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* import { Command } from '@tauri-apps/plugin-shell'
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* Command.create('run-git-commit', ['commit', '-m', 'the commit message'])
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* ```
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*
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* Trying to execute any API with a program not configured on the scope results in a promise rejection due to denied access.
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*
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* @module
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*/
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declare global {
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interface Window {
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__TAURI_INVOKE__: <T>(cmd: string, args?: unknown) => Promise<T>;
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__TAURI__: {
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transformCallback: <T>(cb: (payload: T) => void) => number;
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};
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}
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}
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/**
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* @since 2.0.0
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*/
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interface SpawnOptions {
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/** Current working directory. */
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cwd?: string;
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/** Environment variables. set to `null` to clear the process env. */
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env?: Record<string, string>;
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/**
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* Character encoding for stdout/stderr
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*
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* @since 2.0.0
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* */
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encoding?: string;
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}
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/** @ignore */
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interface InternalSpawnOptions extends SpawnOptions {
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sidecar?: boolean;
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}
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/**
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* @since 2.0.0
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*/
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interface ChildProcess<O extends IOPayload> {
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/** Exit code of the process. `null` if the process was terminated by a signal on Unix. */
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code: number | null;
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/** If the process was terminated by a signal, represents that signal. */
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signal: number | null;
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/** The data that the process wrote to `stdout`. */
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stdout: O;
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/** The data that the process wrote to `stderr`. */
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stderr: O;
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}
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/**
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* Spawns a process.
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*
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* @ignore
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* @param program The name of the scoped command.
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* @param onEvent Event handler.
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* @param args Program arguments.
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* @param options Configuration for the process spawn.
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* @returns A promise resolving to the process id.
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*
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* @since 2.0.0
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*/
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async function execute<O extends IOPayload>(
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onEvent: (event: CommandEvent<O>) => void,
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program: string,
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args: string | string[] = [],
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options?: InternalSpawnOptions
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): Promise<number> {
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if (typeof args === "object") {
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Object.freeze(args);
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}
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return window.__TAURI_INVOKE__<number>("plugin:shell|execute", {
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program,
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args,
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options,
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onEventFn: window.__TAURI__.transformCallback(onEvent),
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});
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}
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/**
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* @since 2.0.0
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*/
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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class EventEmitter<E extends Record<string, any>> {
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/** @ignore */
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// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-explicit-any
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private eventListeners: Record<keyof E, Array<(arg: any) => void>> =
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Object.create(null);
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/**
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* Alias for `emitter.on(eventName, listener)`.
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*
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* @since 2.0.0
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*/
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addListener<N extends keyof E>(
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eventName: N,
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listener: (arg: E[typeof eventName]) => void
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): this {
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return this.on(eventName, listener);
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}
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/**
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* Alias for `emitter.off(eventName, listener)`.
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*
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* @since 2.0.0
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*/
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removeListener<N extends keyof E>(
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eventName: N,
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listener: (arg: E[typeof eventName]) => void
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): this {
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return this.off(eventName, listener);
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}
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/**
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* Adds the `listener` function to the end of the listeners array for the
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* event named `eventName`. No checks are made to see if the `listener` has
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* already been added. Multiple calls passing the same combination of `eventName`and `listener` will result in the `listener` being added, and called, multiple
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* times.
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*
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* Returns a reference to the `EventEmitter`, so that calls can be chained.
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*
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* @since 2.0.0
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*/
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on<N extends keyof E>(
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eventName: N,
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listener: (arg: E[typeof eventName]) => void
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): this {
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if (eventName in this.eventListeners) {
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// eslint-disable-next-line security/detect-object-injection
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this.eventListeners[eventName].push(listener);
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} else {
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// eslint-disable-next-line security/detect-object-injection
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this.eventListeners[eventName] = [listener];
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}
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return this;
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}
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/**
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* Adds a **one-time**`listener` function for the event named `eventName`. The
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* next time `eventName` is triggered, this listener is removed and then invoked.
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*
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* Returns a reference to the `EventEmitter`, so that calls can be chained.
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*
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* @since 2.0.0
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*/
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once<N extends keyof E>(
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eventName: N,
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listener: (arg: E[typeof eventName]) => void
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): this {
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const wrapper = (arg: E[typeof eventName]): void => {
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this.removeListener(eventName, wrapper);
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// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
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listener(arg);
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};
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return this.addListener(eventName, wrapper);
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}
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/**
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* Removes the all specified listener from the listener array for the event eventName
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* Returns a reference to the `EventEmitter`, so that calls can be chained.
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*
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* @since 2.0.0
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*/
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off<N extends keyof E>(
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eventName: N,
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listener: (arg: E[typeof eventName]) => void
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): this {
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if (eventName in this.eventListeners) {
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// eslint-disable-next-line security/detect-object-injection
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this.eventListeners[eventName] = this.eventListeners[eventName].filter(
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(l) => l !== listener
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);
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}
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return this;
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}
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/**
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* Removes all listeners, or those of the specified eventName.
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*
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* Returns a reference to the `EventEmitter`, so that calls can be chained.
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*
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* @since 2.0.0
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*/
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removeAllListeners<N extends keyof E>(event?: N): this {
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if (event) {
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// eslint-disable-next-line @typescript-eslint/no-dynamic-delete,security/detect-object-injection
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delete this.eventListeners[event];
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} else {
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// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
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this.eventListeners = Object.create(null);
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}
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return this;
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}
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/**
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* @ignore
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* Synchronously calls each of the listeners registered for the event named`eventName`, in the order they were registered, passing the supplied arguments
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* to each.
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*
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* @returns `true` if the event had listeners, `false` otherwise.
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*
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* @since 2.0.0
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*/
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emit<N extends keyof E>(eventName: N, arg: E[typeof eventName]): boolean {
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if (eventName in this.eventListeners) {
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// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment,security/detect-object-injection
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const listeners = this.eventListeners[eventName];
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// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
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for (const listener of listeners) listener(arg);
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return true;
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}
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return false;
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}
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/**
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* Returns the number of listeners listening to the event named `eventName`.
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*
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* @since 2.0.0
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*/
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listenerCount<N extends keyof E>(eventName: N): number {
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if (eventName in this.eventListeners)
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// eslint-disable-next-line security/detect-object-injection
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return this.eventListeners[eventName].length;
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return 0;
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}
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/**
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* Adds the `listener` function to the _beginning_ of the listeners array for the
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* event named `eventName`. No checks are made to see if the `listener` has
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* already been added. Multiple calls passing the same combination of `eventName`and `listener` will result in the `listener` being added, and called, multiple
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* times.
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*
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* Returns a reference to the `EventEmitter`, so that calls can be chained.
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*
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* @since 2.0.0
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*/
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prependListener<N extends keyof E>(
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eventName: N,
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listener: (arg: E[typeof eventName]) => void
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): this {
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if (eventName in this.eventListeners) {
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// eslint-disable-next-line security/detect-object-injection
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this.eventListeners[eventName].unshift(listener);
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} else {
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// eslint-disable-next-line security/detect-object-injection
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this.eventListeners[eventName] = [listener];
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}
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return this;
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}
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/**
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* Adds a **one-time**`listener` function for the event named `eventName` to the_beginning_ of the listeners array. The next time `eventName` is triggered, this
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* listener is removed, and then invoked.
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*
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* Returns a reference to the `EventEmitter`, so that calls can be chained.
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*
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* @since 2.0.0
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*/
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prependOnceListener<N extends keyof E>(
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eventName: N,
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listener: (arg: E[typeof eventName]) => void
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): this {
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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const wrapper = (arg: any): void => {
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this.removeListener(eventName, wrapper);
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// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
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listener(arg);
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};
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return this.prependListener(eventName, wrapper);
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}
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}
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/**
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* @since 2.0.0
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*/
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class Child {
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/** The child process `pid`. */
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pid: number;
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constructor(pid: number) {
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this.pid = pid;
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}
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/**
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* Writes `data` to the `stdin`.
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*
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* @param data The message to write, either a string or a byte array.
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* @example
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* ```typescript
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* import { Command } from '@tauri-apps/plugin-shell';
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* const command = Command.create('node');
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* const child = await command.spawn();
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* await child.write('message');
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* await child.write([0, 1, 2, 3, 4, 5]);
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* ```
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*
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* @returns A promise indicating the success or failure of the operation.
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*
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* @since 2.0.0
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*/
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async write(data: IOPayload): Promise<void> {
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return window.__TAURI_INVOKE__("plugin:shell|stdin_write", {
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pid: this.pid,
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// correctly serialize Uint8Arrays
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buffer: typeof data === "string" ? data : Array.from(data),
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});
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}
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/**
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* Kills the child process.
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*
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* @returns A promise indicating the success or failure of the operation.
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*
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* @since 2.0.0
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*/
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async kill(): Promise<void> {
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return window.__TAURI_INVOKE__("plugin:shell|kill", {
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cmd: "killChild",
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pid: this.pid,
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});
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}
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}
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interface CommandEvents {
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close: TerminatedPayload;
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error: string;
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}
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interface OutputEvents<O extends IOPayload> {
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data: O;
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}
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/**
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* The entry point for spawning child processes.
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* It emits the `close` and `error` events.
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* @example
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* ```typescript
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* import { Command } from '@tauri-apps/plugin-shell';
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* const command = Command.create('node');
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* command.on('close', data => {
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* console.log(`command finished with code ${data.code} and signal ${data.signal}`)
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* });
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* command.on('error', error => console.error(`command error: "${error}"`));
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* command.stdout.on('data', line => console.log(`command stdout: "${line}"`));
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* command.stderr.on('data', line => console.log(`command stderr: "${line}"`));
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*
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* const child = await command.spawn();
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* console.log('pid:', child.pid);
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* ```
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*
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* @since 2.0.0
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*
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*/
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class Command<O extends IOPayload> extends EventEmitter<CommandEvents> {
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/** @ignore Program to execute. */
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private readonly program: string;
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/** @ignore Program arguments */
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private readonly args: string[];
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/** @ignore Spawn options. */
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private readonly options: InternalSpawnOptions;
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/** Event emitter for the `stdout`. Emits the `data` event. */
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readonly stdout = new EventEmitter<OutputEvents<O>>();
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/** Event emitter for the `stderr`. Emits the `data` event. */
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readonly stderr = new EventEmitter<OutputEvents<O>>();
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|
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/**
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* @ignore
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* Creates a new `Command` instance.
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*
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* @param program The program name to execute.
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* It must be configured on `tauri.conf.json > plugins > shell > scope`.
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* @param args Program arguments.
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* @param options Spawn options.
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*/
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private constructor(
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program: string,
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args: string | string[] = [],
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options?: SpawnOptions
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) {
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super();
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this.program = program;
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this.args = typeof args === "string" ? [args] : args;
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this.options = options ?? {};
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}
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static create(program: string, args?: string | string[]): Command<string>;
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static create(
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program: string,
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args?: string | string[],
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options?: SpawnOptions & { encoding: "raw" }
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): Command<Uint8Array>;
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static create(
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program: string,
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args?: string | string[],
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options?: SpawnOptions
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): Command<string>;
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|
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/**
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* Creates a command to execute the given program.
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* @example
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* ```typescript
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* import { Command } from '@tauri-apps/plugin-shell';
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* const command = Command.create('my-app', ['run', 'tauri']);
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* const output = await command.execute();
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* ```
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*
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* @param program The program to execute.
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* It must be configured on `tauri.conf.json > plugins > shell > scope`.
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*/
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static create<O extends IOPayload>(
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program: string,
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args: string | string[] = [],
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options?: SpawnOptions
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): Command<O> {
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return new Command(program, args, options);
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}
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static sidecar(program: string, args?: string | string[]): Command<string>;
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static sidecar(
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program: string,
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args?: string | string[],
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options?: SpawnOptions & { encoding: "raw" }
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): Command<Uint8Array>;
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static sidecar(
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program: string,
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args?: string | string[],
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options?: SpawnOptions
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): Command<string>;
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/**
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* Creates a command to execute the given sidecar program.
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|
* @example
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* ```typescript
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* import { Command } from '@tauri-apps/plugin-shell';
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* const command = Command.sidecar('my-sidecar');
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* const output = await command.execute();
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* ```
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*
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* @param program The program to execute.
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* It must be configured on `tauri.conf.json > plugins > shell > scope`.
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*/
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static sidecar<O extends IOPayload>(
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program: string,
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args: string | string[] = [],
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options?: SpawnOptions
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): Command<O> {
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const instance = new Command<O>(program, args, options);
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instance.options.sidecar = true;
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return instance;
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}
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|
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/**
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* Executes the command as a child process, returning a handle to it.
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*
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* @returns A promise resolving to the child process handle.
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*
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* @since 2.0.0
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*/
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|
async spawn(): Promise<Child> {
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|
return execute<O>(
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(event) => {
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switch (event.event) {
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case "Error":
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this.emit("error", event.payload);
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break;
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case "Terminated":
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|
this.emit("close", event.payload);
|
|
break;
|
|
case "Stdout":
|
|
this.stdout.emit("data", event.payload);
|
|
break;
|
|
case "Stderr":
|
|
this.stderr.emit("data", event.payload);
|
|
break;
|
|
}
|
|
},
|
|
this.program,
|
|
this.args,
|
|
this.options
|
|
).then((pid) => new Child(pid));
|
|
}
|
|
|
|
/**
|
|
* Executes the command as a child process, waiting for it to finish and collecting all of its output.
|
|
* @example
|
|
* ```typescript
|
|
* import { Command } from '@tauri-apps/plugin-shell';
|
|
* const output = await Command.create('echo', 'message').execute();
|
|
* assert(output.code === 0);
|
|
* assert(output.signal === null);
|
|
* assert(output.stdout === 'message');
|
|
* assert(output.stderr === '');
|
|
* ```
|
|
*
|
|
* @returns A promise resolving to the child process output.
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
async execute(): Promise<ChildProcess<O>> {
|
|
return new Promise((resolve, reject) => {
|
|
this.on("error", reject);
|
|
|
|
const stdout: O[] = [];
|
|
const stderr: O[] = [];
|
|
this.stdout.on("data", (line: O) => {
|
|
stdout.push(line);
|
|
});
|
|
this.stderr.on("data", (line: O) => {
|
|
stderr.push(line);
|
|
});
|
|
|
|
this.on("close", (payload: TerminatedPayload) => {
|
|
resolve({
|
|
code: payload.code,
|
|
signal: payload.signal,
|
|
stdout: this.collectOutput(stdout) as O,
|
|
stderr: this.collectOutput(stderr) as O,
|
|
});
|
|
});
|
|
|
|
this.spawn().catch(reject);
|
|
});
|
|
}
|
|
|
|
/** @ignore */
|
|
private collectOutput(events: O[]): string | Uint8Array {
|
|
if (this.options.encoding === "raw") {
|
|
return events.reduce<Uint8Array>((p, c) => {
|
|
return new Uint8Array([...p, ...(c as Uint8Array), 10]);
|
|
}, new Uint8Array());
|
|
} else {
|
|
return events.join("\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Describes the event message received from the command.
|
|
*/
|
|
interface Event<T, V> {
|
|
event: T;
|
|
payload: V;
|
|
}
|
|
|
|
/**
|
|
* Payload for the `Terminated` command event.
|
|
*/
|
|
interface TerminatedPayload {
|
|
/** Exit code of the process. `null` if the process was terminated by a signal on Unix. */
|
|
code: number | null;
|
|
/** If the process was terminated by a signal, represents that signal. */
|
|
signal: number | null;
|
|
}
|
|
|
|
/** Event payload type */
|
|
type IOPayload = string | Uint8Array;
|
|
|
|
/** Events emitted by the child process. */
|
|
type CommandEvent<O extends IOPayload> =
|
|
| Event<"Stdout", O>
|
|
| Event<"Stderr", O>
|
|
| Event<"Terminated", TerminatedPayload>
|
|
| Event<"Error", string>;
|
|
|
|
/**
|
|
* Opens a path or URL with the system's default app,
|
|
* or the one specified with `openWith`.
|
|
*
|
|
* The `openWith` value must be one of `firefox`, `google chrome`, `chromium` `safari`,
|
|
* `open`, `start`, `xdg-open`, `gio`, `gnome-open`, `kde-open` or `wslview`.
|
|
*
|
|
* @example
|
|
* ```typescript
|
|
* import { open } from '@tauri-apps/plugin-shell';
|
|
* // opens the given URL on the default browser:
|
|
* await open('https://github.com/tauri-apps/tauri');
|
|
* // opens the given URL using `firefox`:
|
|
* await open('https://github.com/tauri-apps/tauri', 'firefox');
|
|
* // opens a file using the default program:
|
|
* await open('/path/to/file');
|
|
* ```
|
|
*
|
|
* @param path The path or URL to open.
|
|
* This value is matched against the string regex defined on `tauri.conf.json > plugins > shell > open`,
|
|
* which defaults to `^((mailto:\w+)|(tel:\w+)|(https?://\w+)).+`.
|
|
* @param openWith The app to open the file or URL with.
|
|
* Defaults to the system default application for the specified path type.
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
async function open(path: string, openWith?: string): Promise<void> {
|
|
return window.__TAURI_INVOKE__("plugin:shell|open", {
|
|
path,
|
|
with: openWith,
|
|
});
|
|
}
|
|
|
|
export { Command, Child, EventEmitter, open };
|
|
export type {
|
|
IOPayload,
|
|
CommandEvents,
|
|
TerminatedPayload,
|
|
OutputEvents,
|
|
ChildProcess,
|
|
SpawnOptions,
|
|
};
|