From eadc058ca00ba1593df48ed2fa4e69f60707c9aa Mon Sep 17 00:00:00 2001
From: =?utf8?q?J=C3=A9r=C3=B4me=20Benoit?= <jerome.benoit@sap.com>
Date: Sun, 23 Jul 2023 00:50:51 +0200
Subject: [PATCH] build: improve number of workers computation
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Signed-off-by: Jérôme Benoit <jerome.benoit@sap.com>
---
 rollup.config.mjs | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/rollup.config.mjs b/rollup.config.mjs
index 6ee51a63..63f8acc7 100644
--- a/rollup.config.mjs
+++ b/rollup.config.mjs
@@ -1,5 +1,5 @@
 /* eslint-disable n/no-unpublished-import */
-import { cpus } from 'node:os';
+import * as os from 'node:os';
 
 import json from '@rollup/plugin-json';
 import terser from '@rollup/plugin-terser';
@@ -8,6 +8,20 @@ import { copy } from '@web/rollup-plugin-copy';
 import analyze from 'rollup-plugin-analyzer';
 import del from 'rollup-plugin-delete';
 
+const availableParallelism = () => {
+  // eslint-disable-next-line no-shadow
+  let availableParallelism = 1;
+  try {
+    availableParallelism = os.availableParallelism();
+  } catch {
+    const numberOfCpus = os.cpus();
+    if (Array.isArray(numberOfCpus) && numberOfCpus.length > 0) {
+      availableParallelism = numberOfCpus.length;
+    }
+  }
+  return availableParallelism;
+};
+
 const isDevelopmentBuild = process.env.BUILD === 'development';
 const isAnalyzeBuild = process.env.ANALYZE;
 
@@ -19,7 +33,7 @@ export default {
       dir: 'dist',
       format: 'esm',
       sourcemap: !!isDevelopmentBuild,
-      plugins: [terser({ maxWorkers: Math.floor(cpus().length / 2) })],
+      plugins: [terser({ maxWorkers: Math.floor(availableParallelism() / 2) })],
     },
   ],
   external: [
-- 
2.34.1