feat: add process.spawn arg watcher

bin/cli.js

@@ -1,5 +1,9 @@
 #!/usr/bin/env node
 
+if (process.argv.includes("--watchspawn")) {
+	require("../lib/spawnHook").hook();
+}
+
 // Execa hook.
 if (process.argv.includes("--execasync")) {
 	require("../lib/execaHook").hook();

lib/spawnHook.js

@@ -0,0 +1,25 @@
+const childProcess = require("child_process");
+const oldSpawn = childProcess.spawn;
+
+const watchSpawn = (...args) => {
+	console.log("spawn called");
+	console.log(...args);
+
+	return oldSpawn.apply(this, ...args);
+};
+const hook = () => {
+	if (childProcess.spawn === oldSpawn) {
+		childProcess.spawn = watchSpawn;
+	}
+};
+
+const unhook = () => {
+	if (childProcess.spawn === watchSpawn) {
+		childProcess.spawn = oldSpawn;
+	}
+};
+
+module.exports = {
+	hook,
+	unhook
+};