Fix build script errors (#15493)

There is a SES bug that results in errors being printed to the console
as `{}`[1]. The known workaround is to print the error stack rather
than printing the error directly. This affects our build script when it
is run with LavaMoat.

We used this workaround in one place in the build script already, but
not in the handler for task errors. We now use it in both places.

The workaround has been moved to a function that we can use throughout
the build script.

[1]: https://github.com/endojs/endo/issues/944

development/build/scripts.js

@@ -63,6 +63,7 @@ const metamaskrc = {
 const { streamFlatMap } = require('../stream-flat-map');
 const { BuildType } = require('../lib/build-type');
 const { BUILD_TARGETS } = require('./constants');
+const { logError } = require('./utils');
 
 const {
   createTask,
@@ -1053,7 +1054,7 @@ async function createBundle(buildConfiguration, { reloadOnChange }) {
     if (!reloadOnChange) {
       bundleStream.on('error', (error) => {
         console.error('Bundling failed! See details below.');
-        console.error(error.stack || error);
+        logError(error);
         process.exit(1);
       });
     }

development/build/task.js

@@ -15,6 +15,7 @@ module.exports = {
 };
 
 const { setupTaskDisplay } = require('./display');
+const { logError } = require('./utils');
 
 async function runTask(taskName, { skipStats } = {}) {
   if (!(taskName in tasks)) {
@@ -30,7 +31,7 @@ async function runTask(taskName, { skipStats } = {}) {
     console.error(
       `MetaMask build: Encountered an error while running task "${taskName}".`,
     );
-    console.error(err);
+    logError(err);
     process.exit(1);
   }
   taskEvents.emit('complete');

development/build/utils.js

@@ -51,6 +51,21 @@ function getBrowserVersionMap(platforms, version) {
   }, {});
 }
 
+/**
+ * Log an error to the console.
+ *
+ * This function includes a workaround for a SES bug that results in errors
+ * being printed to the console as `{}`. The workaround is to print the stack
+ * instead, which does work correctly.
+ *
+ * @see {@link https://github.com/endojs/endo/issues/944}
+ * @param {Error} error - The error to print
+ */
+function logError(error) {
+  console.error(error.stack || error);
+}
+
 module.exports = {
   getBrowserVersionMap,
+  logError,
 };