Adds support for overriding the concurrency used in the packaging

alexelshamouty · alexelshamouty · commit c189c8f853d0 · 2025-03-30T19:16:46.000+02:00
process
via the SLS_PACKAGE_CONCURRENCY environment variable.

Defaults to os.cpus().length if not set.
Benefits:
- Solve problems running sls in termux and proot environments on
  android. os.cpus() returns an empty list when running in proot and
makes running the framework very difficult for deployments
- Allows better control over system resource usage in constrained environments.
diff --git a/lib/plugins/package/lib/zip-service.js b/lib/plugins/package/lib/zip-service.js
@@ -1,6 +1,6 @@
 import archiver from 'archiver'
 import os from 'os'
-import path from 'path'
+import path, { parse } from 'path'
 import crypto from 'crypto'
 import fs from 'fs'
 import fsp from 'fs/promises'
@@ -102,9 +102,13 @@ export default {
         const normalizedFiles = _.uniq(
           files.map((file) => path.normalize(file)),
         )
+        const concurrency = process.env.SLS_PACKAGE_CONCURRENCY ? parseInt(
+          process.env.SLS_PACKAGE_CONCURRENCY,
+          10,
+        ) : os.cpus().length
 
         return pMap(normalizedFiles, this.getFileContentAndStat.bind(this), {
-          concurrency: os.cpus().length,
+          concurrency,
         })
           .then((contents) => {
             contents
