Tune upload options

packages/cache/src/options.ts

@@ -88,6 +88,7 @@ export interface DownloadOptions {
  * @param copy the original upload options
  */
 export function getUploadOptions(copy?: UploadOptions): UploadOptions {
+  // Defaults if not overriden
   const result: UploadOptions = {
     useAzureSdk: false,
     uploadConcurrency: 4,
@@ -108,6 +109,25 @@ export function getUploadOptions(copy?: UploadOptions): UploadOptions {
     }
   }
 
+  /**
+   * Add env var overrides
+   */
+  // Cap the uploadConcurrency at 32
+  result.uploadConcurrency = !isNaN(
+    Number(process.env['CACHE_UPLOAD_CONCURRENCY'])
+  )
+    ? Math.min(32, Number(process.env['CACHE_UPLOAD_CONCURRENCY']))
+    : result.uploadConcurrency
+  // Cap the uploadChunkSize at 128MiB
+  result.uploadChunkSize = !isNaN(
+    Number(process.env['CACHE_UPLOAD_CHUNK_SIZE'])
+  )
+    ? Math.min(
+        128 * 1024 * 1024,
+        Number(process.env['CACHE_UPLOAD_CHUNK_SIZE']) * 1024 * 1024
+      )
+    : result.uploadChunkSize
+
   core.debug(`Use Azure SDK: ${result.useAzureSdk}`)
   core.debug(`Upload concurrency: ${result.uploadConcurrency}`)
   core.debug(`Upload chunk size: ${result.uploadChunkSize}`)