Updates to @actions/artifact (#396)

* Add support for 429s and Exponential backoff

* Refactor status-reporter so it can be used with download and upload

* Extra logs

* Fixes around download & gzip

* Cleanup headers and add extra tests

* Improved Docs

* Spelling bloopers

* Improved error messages

* User http client version 1.0.7

packages/artifact/src/internal/config-variables.ts

@@ -1,19 +1,31 @@
+// The number of concurrent uploads that happens at the same time
 export function getUploadFileConcurrency(): number {
   return 2
 }
 
+// When uploading large files that can't be uploaded with a single http call, this controls
+// the chunk size that is used during upload
 export function getUploadChunkSize(): number {
   return 4 * 1024 * 1024 // 4 MB Chunks
 }
 
-export function getUploadRetryCount(): number {
-  return 3
+// The maximum number of retries that can be attempted before an upload or download fails
+export function getRetryLimit(): number {
+  return 5
 }
 
-export function getRetryWaitTimeInMilliseconds(): number {
-  return 10000
+// With exponential backoff, the larger the retry count, the larger the wait time before another attempt
+// The retry multiplier controls by how much the backOff time increases depending on the number of retries
+export function getRetryMultiplier(): number {
+  return 1.5
 }
 
+// The initial wait time if an upload or download fails and a retry is being attempted for the first time
+export function getInitialRetryIntervalInMilliseconds(): number {
+  return 3000
+}
+
+// The number of concurrent downloads that happens at the same time
 export function getDownloadFileConcurrency(): number {
   return 2
 }