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src/node/plugin.ts: Implement new plugin API
This commit is contained in:
Anmol Sethi
parent
481df70622
commit
e08a55d44a
@ -1,92 +1,177 @@
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import { field, logger } from "@coder/logger"
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import { Express } from "express"
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import * as fs from "fs"
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import * as path from "path"
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import * as util from "util"
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import { Args } from "./cli"
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import { paths } from "./util"
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import * as util from "./util"
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import * as pluginapi from "../../typings/plugin"
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import * as fs from "fs"
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import * as semver from "semver"
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import { version } from "./constants"
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const fsp = fs.promises
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import { Logger, field } from "@coder/logger"
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import * as express from "express"
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/* eslint-disable @typescript-eslint/no-var-requires */
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// These fields are populated from the plugin's package.json.
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interface Plugin extends pluginapi.Plugin {
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name: string
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version: string
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description: string
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}
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export type Activate = (app: Express, args: Args) => void
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/**
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* Plugins must implement this interface.
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*/
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export interface Plugin {
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activate: Activate
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interface Application extends pluginapi.Application {
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plugin: Plugin
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}
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/**
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* Intercept imports so we can inject code-server when the plugin tries to
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* import it.
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* PluginAPI implements the plugin API described in typings/plugin.d.ts
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* Please see that file for details.
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*/
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const originalLoad = require("module")._load
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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require("module")._load = function (request: string, parent: object, isMain: boolean): any {
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return originalLoad.apply(this, [request.replace(/^code-server/, path.resolve(__dirname, "../..")), parent, isMain])
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}
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export class PluginAPI {
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private readonly plugins = new Array<Plugin>()
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private readonly logger: Logger
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/**
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* Load a plugin and run its activation function.
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*/
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const loadPlugin = async (pluginPath: string, app: Express, args: Args): Promise<void> => {
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try {
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const plugin: Plugin = require(pluginPath)
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plugin.activate(app, args)
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const packageJson = require(path.join(pluginPath, "package.json"))
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logger.debug(
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"Loaded plugin",
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field("name", packageJson.name || path.basename(pluginPath)),
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field("path", pluginPath),
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field("version", packageJson.version || "n/a"),
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)
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} catch (error) {
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logger.error(error.message)
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public constructor(
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logger: Logger,
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/**
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* These correspond to $CS_PLUGIN_PATH and $CS_PLUGIN respectively.
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*/
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private readonly csPlugin = "",
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private readonly csPluginPath = `${path.join(util.paths.data, "plugins")}:/usr/share/code-server/plugins`,
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){
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this.logger = logger.named("pluginapi")
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}
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}
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/**
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* Load all plugins in the specified directory.
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*/
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const _loadPlugins = async (pluginDir: string, app: Express, args: Args): Promise<void> => {
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try {
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const files = await util.promisify(fs.readdir)(pluginDir, {
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withFileTypes: true,
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})
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await Promise.all(files.map((file) => loadPlugin(path.join(pluginDir, file.name), app, args)))
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} catch (error) {
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if (error.code !== "ENOENT") {
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logger.warn(error.message)
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/**
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* applications grabs the full list of applications from
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* all loaded plugins.
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*/
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public async applications(): Promise<Application[]> {
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const apps = new Array<Application>()
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for (let p of this.plugins) {
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const pluginApps = await p.applications()
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// TODO prevent duplicates
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// Add plugin key to each app.
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apps.push(
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...pluginApps.map((app) => {
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return { ...app, plugin: p }
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}),
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)
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}
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return apps
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}
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/**
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* mount mounts all plugin routers onto r.
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*/
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public mount(r: express.Router): void {
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for (let p of this.plugins) {
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r.use(`/${p.name}`, p.router())
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}
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}
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/**
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* loadPlugins loads all plugins based on this.csPluginPath
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* and this.csPlugin.
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*/
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public async loadPlugins(): Promise<void> {
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// Built-in plugins.
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await this._loadPlugins(path.join(__dirname, "../../plugins"))
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for (let dir of this.csPluginPath.split(":")) {
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if (!dir) {
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continue
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}
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await this._loadPlugins(dir)
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}
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for (let dir of this.csPlugin.split(":")) {
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if (!dir) {
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continue
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}
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await this.loadPlugin(dir)
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}
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}
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private async _loadPlugins(dir: string): Promise<void> {
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try {
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const entries = await fsp.readdir(dir, { withFileTypes: true })
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for (let ent of entries) {
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if (!ent.isDirectory()) {
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continue
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}
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await this.loadPlugin(path.join(dir, ent.name))
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}
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} catch (err) {
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if (err.code !== "ENOENT") {
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this.logger.warn(`failed to load plugins from ${q(dir)}: ${err.message}`)
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}
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}
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}
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private async loadPlugin(dir: string): Promise<void> {
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try {
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const str = await fsp.readFile(path.join(dir, "package.json"), {
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encoding: "utf8",
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})
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const packageJSON: PackageJSON = JSON.parse(str)
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const p = this._loadPlugin(dir, packageJSON)
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// TODO prevent duplicates
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this.plugins.push(p)
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} catch (err) {
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if (err.code !== "ENOENT") {
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this.logger.warn(`failed to load plugin: ${err.message}`)
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}
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}
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}
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private _loadPlugin(dir: string, packageJSON: PackageJSON): Plugin {
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const logger = this.logger.named(packageJSON.name)
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logger.debug("loading plugin",
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field("plugin_dir", dir),
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field("package_json", packageJSON),
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)
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if (!semver.satisfies(version, packageJSON.engines["code-server"])) {
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throw new Error(`plugin range ${q(packageJSON.engines["code-server"])} incompatible` +
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` with code-server version ${version}`)
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}
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if (!packageJSON.name) {
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throw new Error("plugin missing name")
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}
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if (!packageJSON.version) {
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throw new Error("plugin missing version")
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}
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if (!packageJSON.description) {
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throw new Error("plugin missing description")
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}
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const p = {
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name: packageJSON.name,
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version: packageJSON.version,
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description: packageJSON.description,
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...require(dir),
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} as Plugin
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p.init({
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logger: logger,
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})
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logger.debug("loaded")
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return p
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}
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}
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/**
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* Load all plugins from the `plugins` directory, directories specified by
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* `CS_PLUGIN_PATH` (colon-separated), and individual plugins specified by
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* `CS_PLUGIN` (also colon-separated).
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*/
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export const loadPlugins = async (app: Express, args: Args): Promise<void> => {
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const pluginPath = process.env.CS_PLUGIN_PATH || `${path.join(paths.data, "plugins")}:/usr/share/code-server/plugins`
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const plugin = process.env.CS_PLUGIN || ""
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await Promise.all([
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// Built-in plugins.
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_loadPlugins(path.resolve(__dirname, "../../plugins"), app, args),
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// User-added plugins.
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...pluginPath
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.split(":")
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.filter((p) => !!p)
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.map((dir) => _loadPlugins(path.resolve(dir), app, args)),
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// Individual plugins so you don't have to symlink or move them into a
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// directory specifically for plugins. This lets you load plugins that are
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// on the same level as other directories that are not plugins (if you tried
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// to use CS_PLUGIN_PATH code-server would try to load those other
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// directories as plugins). Intended for development.
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...plugin
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.split(":")
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.filter((p) => !!p)
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.map((dir) => loadPlugin(path.resolve(dir), app, args)),
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])
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interface PackageJSON {
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name: string
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version: string
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description: string
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engines: {
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"code-server": string
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}
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}
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function q(s: string): string {
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if (s === undefined) {
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s = "undefined"
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}
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return JSON.stringify(s)
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}
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@ -12,7 +12,7 @@ import { AuthType, DefaultedArgs } from "../cli"
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import { rootPath } from "../constants"
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import { Heart } from "../heart"
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import { replaceTemplates } from "../http"
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import { loadPlugins } from "../plugin"
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import { PluginAPI } from "../plugin"
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import { getMediaMime, paths } from "../util"
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import { WebsocketRequest } from "../wsRouter"
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import * as domainProxy from "./domainProxy"
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@ -115,7 +115,9 @@ export const register = async (
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app.use("/static", _static.router)
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app.use("/update", update.router)
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await loadPlugins(app, args)
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const papi = new PluginAPI(logger, process.env.CS_PLUGIN, process.env.CS_PLUGIN_PATH)
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await papi.loadPlugins()
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papi.mount(app)
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app.use(() => {
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throw new HttpError("Not Found", HttpCode.NotFound)
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