chore: choose free port for opengb

rivet-toolchain/Cargo.toml

@@ -38,6 +38,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 strum = { version = "0.24", features = ["derive"] }
 sysinfo = "0.30.0"
+portpicker = "0.1"
 tabled = "0.8.0"
 tar = "0.4.40"
 tempfile = "3.2"

rivet-toolchain/src/tasks/backend_choose_local_port.rs

@@ -0,0 +1,28 @@
+use global_error::prelude::*;
+use serde::{Deserialize, Serialize};
+
+use crate::util::task::TaskCtx;
+
+#[derive(Deserialize)]
+pub struct Input {}
+
+#[derive(Serialize)]
+pub struct Output {
+	pub port: u16,
+}
+
+pub struct Task;
+
+impl super::Task for Task {
+	type Input = Input;
+	type Output = Output;
+
+	fn name() -> &'static str {
+		"backend_choose_local_port"
+	}
+
+	async fn run(_task: TaskCtx, _input: Self::Input) -> GlobalResult<Self::Output> {
+		let port = unwrap!(portpicker::pick_unused_port(), "no free ports");
+		Ok(Output { port })
+	}
+}

rivet-toolchain/src/tasks/backend_dev.rs

@@ -5,6 +5,7 @@ use crate::{backend, config, util::task::TaskCtx};
 
 #[derive(Deserialize)]
 pub struct Input {
+	pub port: u16,
 	pub cwd: String,
 }
 
@@ -30,6 +31,7 @@ impl super::Task for Task {
 			Ok(env)
 		})
 		.await?;
+		cmd_env.insert("OPENGB_PORT".into(), input.port.to_string());
 		cmd_env.insert("OPENGB_TERM_COLOR".into(), "never".into());
 		let exit_code = backend::run_opengb_command(
 			task.clone(),

rivet-toolchain/src/tasks/mod.rs

@@ -1,3 +1,4 @@
+pub mod backend_choose_local_port;
 pub mod backend_dev;
 pub mod backend_sdk_gen;
 pub mod check_login_state;
@@ -72,6 +73,7 @@ macro_rules! gen_run_task {
 }
 
 gen_run_task!(
+	backend_choose_local_port::Task,
 	backend_dev::Task,
 	backend_sdk_gen::Task,
 	check_login_state::Task,