code-server/src/node/settings.ts

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2020-02-05 03:27:46 +08:00
import * as fs from "fs-extra"
import { logger } from "@coder/logger"
import { extend } from "./util"
export type Settings = { [key: string]: Settings | string | boolean | number }
/**
* Provides read and write access to settings.
*/
export class SettingsProvider<T> {
public constructor(private readonly settingsPath: string) {}
/**
* Read settings from the file. On a failure return last known settings and
* log a warning.
*/
public async read(): Promise<T> {
try {
const raw = (await fs.readFile(this.settingsPath, "utf8")).trim()
return raw ? JSON.parse(raw) : {}
} catch (error) {
if (error.code !== "ENOENT") {
logger.warn(error.message)
}
}
return {} as T
}
/**
* Write settings combined with current settings. On failure log a warning.
* Objects will be merged and everything else will be replaced.
*/
public async write(settings: Partial<T>): Promise<void> {
try {
await fs.writeFile(this.settingsPath, JSON.stringify(extend(this.read(), settings)))
} catch (error) {
logger.warn(error.message)
}
}
}