better size analysis

packages/temporal-polyfill/package.json

@@ -34,7 +34,7 @@
     "readme": "cp ../../README.md dist",
     "test": "./scripts/test.js",
     "clean": "./scripts/clean.js --tsc",
-    "size": "gzip-size --include-original --raw dist/global.min.js && pnpm export-size ./dist --output --bundler rollup"
+    "size": "./scripts/size.js"
   },
   "type": "module",
   "buildConfig": {
@@ -88,7 +88,7 @@
     "concurrently": "^8.2.0",
     "eslint": "^7.25.0",
     "export-size": "workspace:*",
-    "gzip-size": "^7.0.0",
+    "gzip-size-cli": "^5.1.0",
     "rollup": "^4.9.6",
     "rollup-plugin-dts": "^6.1.0",
     "rollup-plugin-sourcemaps": "^0.6.3",

packages/temporal-polyfill/scripts/lib/utils.js

@@ -0,0 +1,26 @@
+import { spawn } from 'child_process'
+
+export function execLive(cmdParts, options = {}) {
+  return new Promise((resolve, reject) => {
+    spawn(cmdParts[0], cmdParts.slice(1), {
+      shell: false,
+      stdio: 'inherit',
+      ...options,
+    }).on('close', (status) => {
+      if (status === 0) {
+        resolve()
+      } else {
+        reject(new Error(`Command failed with status code ${status}`))
+      }
+    })
+  })
+}
+
+export function popFlag(argv, arg) {
+  const i = argv.indexOf(arg)
+  if (i !== -1) {
+    argv.splice(i, 1)
+    return true
+  }
+  return false
+}

packages/temporal-polyfill/scripts/size.js

@@ -0,0 +1,56 @@
+#!/usr/bin/env node
+
+import { readFile } from 'fs/promises'
+import { popFlag, execLive } from './lib/utils.js'
+
+const argv = process.argv.slice(2)
+displaySizes(
+  popFlag(argv, '--output'),
+  popFlag(argv, '--raw'),
+  popFlag(argv, '--all'),
+  argv,
+)
+
+/*
+Only works when run from PNPM-run context, for bin paths
+*/
+async function displaySizes(debugOutput, rawSizes, allEntryPoints, entryPoints) {
+  if (allEntryPoints) {
+    const pkgJson = JSON.parse(await readFile('./package.json'))
+    entryPoints = Object.keys(pkgJson.buildConfig.exports)
+  }
+
+  if (!entryPoints.length) {
+    entryPoints = ['.']
+  }
+
+  // normalize, remove leading ./ (except for root, which leaves '.')
+  entryPoints = entryPoints
+    .map((entryPoint) => entryPoint.replace(/^\.\//, ''))
+    .filter((entryPoint) => Boolean(entryPoint))
+
+  if (entryPoints.length > 1 && debugOutput) {
+    throw RangeError('Cannot debug output with multiple entry points')
+  }
+
+  const globalIifePath = './dist/global.min.js'
+  console.log(`Size of ${globalIifePath} ...`)
+  await execLive([
+    'gzip-size',
+    '--include-original',
+    ...(rawSizes ? ['--raw'] : []),
+    globalIifePath,
+  ])
+  console.log()
+
+  for (const entryPoint of entryPoints) {
+    await execLive([
+      'export-size',
+      '--bundler', 'rollup',
+      '--compression', 'gzip',
+      ...(debugOutput ? ['--output'] : []),
+      ...(rawSizes ? ['--raw'] : []),
+      './dist' + (entryPoint === '.' ? '' : `:${entryPoint}`),
+    ])
+  }
+}

packages/temporal-polyfill/scripts/test.js

@@ -3,9 +3,9 @@
 
 import runTest262 from '@js-temporal/temporal-test262-runner'
 import { join as joinPaths } from 'path'
-import { spawn } from 'child_process'
 import yargs from 'yargs'
 import { hideBin } from 'yargs/helpers'
+import { execLive } from './lib/utils.js'
 import { extensions } from './lib/config.js'
 
 const scriptsDir = joinPaths(process.argv[1], '..')
@@ -62,7 +62,7 @@ yargs(hideBin(process.argv))
         options.nodeVersion !== currentNodeVersion &&
         !process.env.NODE_VERSION // not already executing a forced-version call
       ) {
-        return await liveExec([
+        return await execLive([
           'pnpm', 'exec', 'node', ...process.argv.slice(1),
         ], {
           cwd: process.cwd(),
@@ -125,25 +125,6 @@ yargs(hideBin(process.argv))
   .showHelpOnFail(false)
   .parse()
 
-// Utils
-// -------------------------------------------------------------------------------------------------
-
-function liveExec(cmdParts, options = {}) {
-  return new Promise((resolve, reject) => {
-    spawn(cmdParts[0], cmdParts.slice(1), {
-      shell: false,
-      stdio: 'inherit',
-      ...options,
-    }).on('close', (status) => {
-      if (status === 0) {
-        resolve()
-      } else {
-        reject(new Error(`Command failed with status code ${status}`))
-      }
-    })
-  })
-}
-
 // Filter away Node-related environment variables because prevents
 // PNPM's use-node-version from being reset
 function filterEnv(oldEnv) {