feat(cli): speed up dev deploy with temporary automine during deploy

.changeset/real-pianos-yell.md

@@ -0,0 +1,5 @@
+---
+"@latticexyz/cli": patch
+---
+
+Speed up deployment in development by temporarily enabling automine mode for the duration of the deployment.

packages/cli/src/runDeploy.ts

@@ -16,6 +16,7 @@ import { WorldDeploy } from "./deploy/common";
 import { build } from "./build";
 import { kmsKeyToAccount } from "@latticexyz/common/kms";
 import { configToModules } from "./deploy/configToModules";
+import { enableAutomine } from "./utils/enableAutomine";
 
 export const deployOptions = {
   configPath: { type: "string", desc: "Path to the MUD config file" },
@@ -133,6 +134,9 @@ export async function runDeploy(opts: DeployOptions): Promise<WorldDeploy> {
 
   console.log("Deploying from", client.account.address);
 
+  // Attempt to enable automine for the duration of the deploy. Noop if automine is not available.
+  const { reset: resetMiningMode } = await enableAutomine(client);
+
   const startTime = Date.now();
   const worldDeploy = await deploy({
     deployerAddress: opts.deployerAddress as Hex | undefined,
@@ -155,6 +159,10 @@ export async function runDeploy(opts: DeployOptions): Promise<WorldDeploy> {
       opts.kms ? true : false,
     );
   }
+
+  // Reset mining mode after deploy
+  await resetMiningMode();
+
   console.log(chalk.green("Deployment completed in", (Date.now() - startTime) / 1000, "seconds"));
 
   const deploymentInfo = {

packages/cli/src/utils/enableAutomine.ts

@@ -0,0 +1,59 @@
+import { getAutomine, getBlock, setAutomine, setIntervalMining } from "viem/actions";
+import { debug, error } from "../debug";
+import { Client } from "viem";
+import { getAction } from "viem/utils";
+
+type MiningMode =
+  | {
+      type: "automine";
+    }
+  | {
+      type: "interval";
+      blockTime: number;
+    };
+
+export type EnableAutomineResult = { reset: () => Promise<void> };
+
+export async function enableAutomine(client: Client): Promise<EnableAutomineResult> {
+  try {
+    debug("Enabling automine");
+    const prevMiningMode = await getMiningMode(client);
+    await setMiningMode(client, { type: "automine" });
+    return {
+      reset: () => {
+        debug("Disabling automine");
+        return setMiningMode(client, prevMiningMode);
+      },
+    };
+  } catch (e) {
+    debug("Skipping automine");
+    error(e);
+    return { reset: async () => void 0 };
+  }
+}
+
+async function getMiningMode(client: Client): Promise<MiningMode> {
+  const localClient = { mode: "anvil", ...client }; // set default mode to "anvil", potential error is caught by enableAutomine
+  const isAutomine = await getAction(localClient, getAutomine, "getAutomine")({});
+  if (isAutomine) {
+    return { type: "automine" };
+  }
+
+  const blockTime = await getBlockTime(client);
+  return { type: "interval", blockTime };
+}
+
+async function setMiningMode(client: Client, miningMode: MiningMode): Promise<void> {
+  if (miningMode.type === "automine") {
+    await getAction(client, setAutomine, "setAutomine")(true);
+  } else {
+    await getAction(client, setIntervalMining, "setIntervalMining")({ interval: miningMode.blockTime });
+  }
+}
+
+async function getBlockTime(client: Client): Promise<number> {
+  const latestBlock = await getAction(client, getBlock, "getBlock")({ blockTag: "latest" });
+  const previousBlock = await getAction(client, getBlock, "getBlock")({ blockNumber: latestBlock.number - 1n });
+  const blockTime = latestBlock.timestamp - previousBlock.timestamp;
+  return Number(blockTime);
+}