Add Node config for overwriting socket file if it exists

node/README.md

@@ -1,4 +1,4 @@
 ### Listen config
-If `type` is `unix`, `path` is the path where to create the socket.
+If `type` is `unix`, `path` is the path where to create the socket, and `force` is whether to overwrite the socket file if it already exists.
 
 If `type` is `tcp`, `port` and `host` are the host/port where to listen.

node/example-config.json

@@ -1,6 +1,7 @@
 {
 	"listen": {
 		"type": "unix",
-		"path": "/var/run/matrix-appservice-kakaotalk/rpc.sock"
+		"path": "/var/run/matrix-appservice-kakaotalk/rpc.sock",
+        "force": false
 	}
 }

node/src/clientmanager.js

@@ -46,12 +46,17 @@ export default class ClientManager {
 		}
 	}
 
-	async startUnix(socketPath) {
+	async startUnix(socketPath, force) {
 		try {
 			await fs.promises.access(path.dirname(socketPath))
 		} catch (err) {
 			await fs.promises.mkdir(path.dirname(socketPath), 0o700)
 		}
+		if (force) {
+			try {
+				await fs.promises.unlink(socketPath)
+			} catch (err) {}
+		}
 		await promisify(cb => this.server.listen(socketPath, cb))
 		await fs.promises.chmod(socketPath, 0o700)
 		this.log("Now listening at", socketPath)
@@ -66,7 +71,7 @@ export default class ClientManager {
 		this.log("Starting server")
 
 		if (this.listenConfig.type === "unix") {
-			await this.startUnix(this.listenConfig.path)
+			await this.startUnix(this.listenConfig.path, this.listenConfig.force)
 		} else if (this.listenConfig.type === "tcp") {
 			await this.startTCP(this.listenConfig.port, this.listenConfig.host)
 		}