mirror of
https://github.com/tauri-apps/tauri.git
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577 lines
18 KiB
TypeScript
577 lines
18 KiB
TypeScript
// 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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* This package is also accessible with `window.__TAURI__.shell` when [`build.withGlobalTauri`](https://tauri.app/v1/api/config/#buildconfig.withglobaltauri) in `tauri.conf.json` is set to `true`.
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*
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* The APIs must be added to [`tauri.allowlist.shell`](https://tauri.app/v1/api/config/#allowlistconfig.shell) in `tauri.conf.json`:
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* ```json
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* {
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* "tauri": {
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* "allowlist": {
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* "shell": {
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* "all": true, // enable all shell APIs
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* "execute": true, // enable process spawn APIs
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* "sidecar": true, // enable spawning sidecars
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* "open": true // enable opening files/URLs using the default program
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* }
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* }
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* }
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* }
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* ```
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* It is recommended to allowlist only the APIs you use for optimal bundle size and security.
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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 allowlist, `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 `shell` allowlist 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.constructor | Command constructor}.
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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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* "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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* Usage:
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* ```typescript
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* import { Command } from '@tauri-apps/api/shell'
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* new Command('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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import { invokeTauriCommand } from './helpers/tauri'
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import { transformCallback } from './tauri'
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/**
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* @since 1.0.0
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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 1.1.0
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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 1.0.0
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*/
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interface ChildProcess {
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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: string
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/** The data that the process wrote to `stderr`. */
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stderr: string
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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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async function execute(
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onEvent: (event: CommandEvent) => 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 invokeTauriCommand<number>({
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__tauriModule: 'Shell',
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message: {
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cmd: 'execute',
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program,
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args,
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options,
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onEventFn: transformCallback(onEvent)
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}
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})
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}
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/**
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* @since 1.0.0
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*/
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class EventEmitter<E extends string> {
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/** @ignore */
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// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
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private eventListeners: Record<E, Array<(...args: 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 1.1.0
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*/
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addListener(eventName: E, listener: (...args: any[]) => void): 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 1.1.0
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*/
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removeListener(eventName: E, listener: (...args: any[]) => void): 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 1.0.0
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*/
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on(eventName: E, listener: (...args: any[]) => void): 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 1.1.0
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*/
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once(eventName: E, listener: (...args: any[]) => void): this {
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const wrapper = (...args: 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(...args)
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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 1.1.0
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*/
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off(eventName: E, listener: (...args: any[]) => void): 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 1.1.0
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*/
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removeAllListeners(event?: E): 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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emit(eventName: E, ...args: any[]): 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(...args)
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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 1.1.0
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*/
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listenerCount(eventName: E): 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 1.1.0
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*/
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prependListener(eventName: E, listener: (...args: any[]) => void): 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 1.1.0
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*/
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prependOnceListener(eventName: E, listener: (...args: any[]) => void): this {
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const wrapper = (...args: 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(...args)
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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 1.1.0
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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/api/shell';
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* const command = new Command('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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async write(data: string | Uint8Array): Promise<void> {
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return invokeTauriCommand({
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__tauriModule: 'Shell',
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message: {
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cmd: 'stdinWrite',
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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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/**
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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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async kill(): Promise<void> {
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return invokeTauriCommand({
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__tauriModule: 'Shell',
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message: {
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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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}
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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/api/shell';
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* const command = new Command('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 1.1.0
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*
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*/
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class Command extends EventEmitter<'close' | 'error'> {
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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<'data'>()
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/** Event emitter for the `stderr`. Emits the `data` event. */
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readonly stderr = new EventEmitter<'data'>()
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/**
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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 > tauri > allowlist > 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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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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/**
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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/api/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 > tauri > allowlist > shell > scope`.
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*/
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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 {
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const instance = new Command(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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* 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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async spawn(): Promise<Child> {
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return execute(
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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)
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break
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case 'Stdout':
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this.stdout.emit('data', event.payload)
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break
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case 'Stderr':
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this.stderr.emit('data', event.payload)
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break
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}
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},
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this.program,
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this.args,
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this.options
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).then((pid) => new Child(pid))
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}
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/**
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* Executes the command as a child process, waiting for it to finish and collecting all of its output.
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* @example
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* ```typescript
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* import { Command } from '@tauri-apps/api/shell';
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* const output = await new Command('echo', 'message').execute();
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* assert(output.code === 0);
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* assert(output.signal === null);
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* assert(output.stdout === 'message');
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* assert(output.stderr === '');
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* ```
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*
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* @returns A promise resolving to the child process output.
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*/
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async execute(): Promise<ChildProcess> {
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return new Promise((resolve, reject) => {
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this.on('error', reject)
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const stdout: string[] = []
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const stderr: string[] = []
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this.stdout.on('data', (line: string) => {
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stdout.push(line)
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})
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this.stderr.on('data', (line: string) => {
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stderr.push(line)
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})
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this.on('close', (payload: TerminatedPayload) => {
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resolve({
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code: payload.code,
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signal: payload.signal,
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stdout: stdout.join('\n'),
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stderr: stderr.join('\n')
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})
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})
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this.spawn().catch(reject)
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})
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}
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}
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/**
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* Describes the event message received from the command.
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*/
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interface Event<T, V> {
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event: T
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payload: V
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}
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/**
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* Payload for the `Terminated` command event.
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*/
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interface TerminatedPayload {
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|
/** 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
|
|
}
|
|
|
|
/** Events emitted by the child process. */
|
|
type CommandEvent =
|
|
| Event<'Stdout', string>
|
|
| Event<'Stderr', string>
|
|
| 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/api/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 > tauri > allowlist > 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 1.0.0
|
|
*/
|
|
async function open(path: string, openWith?: string): Promise<void> {
|
|
return invokeTauriCommand({
|
|
__tauriModule: 'Shell',
|
|
message: {
|
|
cmd: 'open',
|
|
path,
|
|
with: openWith
|
|
}
|
|
})
|
|
}
|
|
|
|
export { Command, Child, EventEmitter, open }
|
|
export type { ChildProcess, SpawnOptions }
|