SETTINGS: Add an autoexec setting (#505)

src/NetscriptWorker.ts

@@ -23,11 +23,13 @@ import { Settings } from "./Settings/Settings";
 import { generate } from "escodegen";
 
 import { dialogBoxCreate } from "./ui/React/DialogBox";
+import { formatRam } from "./ui/formatNumber";
 import { arrayToString } from "./utils/helpers/ArrayHelpers";
 import { roundToTwo } from "./utils/helpers/roundToTwo";
 
 import { parse } from "acorn";
 import { simple as walksimple } from "acorn-walk";
+import { parseCommand } from "./Terminal/Parser";
 import { Terminal } from "./Terminal";
 import { ScriptArg } from "@nsdefs";
 import { handleUnknownError, CompleteRunOptions, getRunningScriptsByArgs } from "./Netscript/NetscriptHelpers";
@@ -284,10 +286,12 @@ function createAndAddWorkerScript(runningScriptObj: RunningScript, server: BaseS
   const ramAvailable = server.maxRam - server.ramUsed;
   // Check failure conditions before generating the workersScript and return false
   if (ramUsage > ramAvailable + 0.001) {
-    dialogBoxCreate(
-      `Not enough RAM to run script ${runningScriptObj.filename} with args ${arrayToString(runningScriptObj.args)}.\n` +
-        `This can occur when you reload the game and the script's RAM usage has increased (either because of an update to the game or ` +
-        `your changes to the script).\nThis can also occur if you have attempted to launch a script from a tail window with insufficient RAM. `,
+    deferredError(
+      `Not enough RAM to run script ${runningScriptObj.filename} with args ${arrayToString(
+        runningScriptObj.args,
+      )}, needed ${formatRam(ramUsage)} but only have ${formatRam(ramAvailable)} free
+If you are seeing this on startup, likely causes are that the autoexec script is too big to fit in RAM, or it took up too much space and other previously running scripts couldn't fit on home.
+Otherwise, this can also occur if you have attempted to launch a script from a tail window with insufficient RAM.`,
     );
     return false;
   }
@@ -295,7 +299,7 @@ function createAndAddWorkerScript(runningScriptObj: RunningScript, server: BaseS
   // Get the pid
   const pid = generateNextPid();
   if (pid === -1) {
-    dialogBoxCreate(
+    deferredError(
       `Failed to start script because could not find available PID. This is most ` +
         `because you have too many scripts running.`,
     );
@@ -340,6 +344,42 @@ export function updateOnlineScriptTimes(numCycles = 1): void {
   }
 }
 
+// Needed for popping dialog boxes in functions that run *before* the UI is
+// created, and thus before AlertManager exists to listen to the alerts we
+// create.
+function deferredError(msg: string) {
+  setTimeout(() => dialogBoxCreate(msg), 0);
+}
+
+function createAutoexec(server: BaseServer): RunningScript | null {
+  const args = parseCommand(Settings.AutoexecScript);
+  if (args.length === 0) return null;
+
+  const cmd = String(args[0]);
+  const scriptPath = resolveScriptFilePath(cmd);
+  if (!scriptPath) {
+    deferredError(`While running autoexec script:
+"${cmd}" is invalid for a script name (maybe missing suffix?)`);
+    return null;
+  }
+  const script = server.scripts.get(scriptPath);
+  if (!script) {
+    deferredError(`While running autoexec script:
+"${cmd}" does not exist!`);
+    return null;
+  }
+  const ramUsage = script.getRamUsage(server.scripts);
+  if (ramUsage === null) {
+    deferredError(`While running autoexec script:
+"${cmd}" has errors!`);
+    return null;
+  }
+  args.shift();
+  const rs = new RunningScript(script, ramUsage, args);
+  rs.temporary = true;
+  return rs;
+}
+
 /**
  * Called when the game is loaded. Loads all running scripts (from all servers)
  * into worker scripts so that they will start running
@@ -360,6 +400,13 @@ export function loadAllRunningScripts(): void {
       // Start game with no scripts
       continue;
     }
+    if (server.hostname === "home") {
+      // Push autoexec script onto the front of the list
+      const runningScript = createAutoexec(server);
+      if (runningScript) {
+        rsList.unshift(runningScript);
+      }
+    }
     for (const runningScript of rsList) {
       startWorkerScript(runningScript, server);
       scriptCalculateOfflineProduction(runningScript);