chore: print the bundle size of ecs tasks (#1439)

This was lost when we moved to a custom bundler.
Manually recreates the output format that esbuild uses.

Previously:
<img width="1668" alt="image"
src="https://github.com/user-attachments/assets/cd65b09f-1252-4f42-b0b7-42c1b952b36a">

Now:
<img width="1664" alt="image"
src="https://github.com/user-attachments/assets/9d722f38-884b-45fd-b0a8-24f4942b024e">

----

*By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license*

Author: mrgrain

.projen/deps.json

@@ -55,6 +55,7 @@ const project = new CdklabsConstructLibrary({
     'aws-xray-sdk-core',
     'case',
     'cdk-dia',
+    'chalk',
     'esbuild',
     'feed',
     'fs-extra',

.projen/tasks.json

@@ -1,5 +1,11 @@
+import { basename, dirname, posix } from 'path';
+import { Instance as Chalk } from 'chalk';
 import * as esbuild from 'esbuild';
 
+const chalk = new Chalk({
+  level: process.env.NO_COLOR ? 0 : 1,
+});
+
 async function main(args: string[]) {
   const [entrypoint, outfile, maybeWatch] = args;
   if (!outfile) {
@@ -53,12 +59,58 @@ async function main(args: string[]) {
           `Bundle built from '${entrypoint}' contains 'aws-cdk-lib' somewhere in its dependency closure. Shake it!`
         );
       }
+
+      if (result.metafile) {
+        console.log('\n' + formatOutputs(result.metafile).join('\n') + '\n');
+      }
     }
   } finally {
     await context.dispose();
   }
 }
 
+function formatOutputs(metafile: esbuild.Metafile): string[] {
+  const files = new Array<[string, number]>();
+  for (const output of Object.entries(metafile.outputs)) {
+    files.push([output[0], output[1].bytes]);
+  }
+
+  // get the length of the longest file
+  const max = files.reduce((a, b) => (a > b[0].length ? a : b[0].length), 0);
+
+  return files
+    .sort((a, b) => a[0].localeCompare(b[0]))
+    .map(
+      ([file, size]) =>
+        ' '.repeat(2) +
+        formatPath(file) +
+        ' '.repeat(2 + (max - file.length)) +
+        formatSize(size)
+    );
+}
+
+function formatPath(path: string): string {
+  return `${dirname(path)}${posix.sep}${chalk.bold(basename(path))}`;
+}
+
+function formatSize(bytes: number, warnLimit = 10_000_000): string {
+  const shouldWarn = bytes >= warnLimit;
+  const paint = shouldWarn ? chalk.yellow : chalk.cyan;
+
+  const result = [paint(formatBytes(bytes))];
+  if (shouldWarn) {
+    result.push(chalk.yellow(`⚠`));
+  }
+  return result.join(' ');
+}
+
+function formatBytes(bytes: number): string {
+  const k = bytes > 0 ? Math.floor(Math.log2(bytes) / 10) : 0;
+  const rank = ['b', 'kb', 'mb', 'gb', 'tb'][k];
+  const value = bytes / Math.pow(1000, k);
+  return value.toFixed(1) + rank;
+}
+
 function ignoreWarnings(
   result: esbuild.BuildResult,
   packagesWithAllowedWarnings: string[]