public async close()

in src/debugAdapter/goDebug.ts [809:878]
60 lines of code
16 McCabe index (conditional complexity)

	public async close(): Promise<void> {
		const forceCleanup = async () => {
			log(`killing debugee (pid: ${this.debugProcess?.pid})...`);
			if (this.debugProcess) {
				await killProcessTree(this.debugProcess, log);
			}
			if (this.localDebugeePath) {
				await removeFile(this.localDebugeePath);
			}
		};

		if (this.noDebug) {
			// delve isn't running so no need to halt
			await forceCleanup();
			return Promise.resolve();
		}
		const isLocalDebugging: boolean = this.request === 'launch' && !!this.debugProcess;

		return new Promise(async (resolve) => {
			this.delveConnectionClosed = true;

			// For remote debugging, we want to leave the remote dlv server running,
			// so instead of killing it via halt+detach, we just close the network connection.
			// See https://www.github.com/go-delve/delve/issues/1587
			if (this.isRemoteDebugging) {
				log('Remote Debugging: close dlv connection.');
				const rpcConnection = await this.connection;
				// tslint:disable-next-line no-any
				(rpcConnection as any)['conn']['end']();
				return resolve();
			}
			const timeoutToken =
				isLocalDebugging &&
				setTimeout(async () => {
					log('Killing debug process manually as we could not halt delve in time');
					await forceCleanup();
					resolve();
				}, 1000);

			let haltErrMsg: string | undefined;
			try {
				log('HaltRequest');
				await this.callPromise('Command', [{ name: 'halt' }]);
			} catch (err) {
				log('HaltResponse');
				log(`Failed to halt - ${err}`);
			}
			if (timeoutToken) {
				clearTimeout(timeoutToken);
			}

			const targetHasExited = !!haltErrMsg && haltErrMsg.endsWith('has exited with status 0');
			const shouldDetach = !haltErrMsg || targetHasExited;
			let shouldForceClean = !shouldDetach && isLocalDebugging;
			if (shouldDetach) {
				log('DetachRequest');
				try {
					await this.callPromise('Detach', [this.isApiV1 ? true : { Kill: isLocalDebugging }]);
				} catch (err) {
					log('DetachResponse');
					logError(`Failed to detach - ${err}`);
					shouldForceClean = isLocalDebugging;
				}
			}
			if (shouldForceClean) {
				await forceCleanup();
			}
			return resolve();
		});
	}