From 1bf35a1db7c326ddc661c444a075e0d73a462544 Mon Sep 17 00:00:00 2001
From: Eric Swanson <64809312+ericswanson-dfinity@users.noreply.github.com>
Date: Tue, 26 Sep 2023 15:37:06 -0700
Subject: [PATCH] test: retry mops sources call in playground e2e tests (#3392)

The `mops sources` command in the playground e2e tests fails often.  The retry logic in the JS agent misses some classes of failures (basically, if `fetch` throws).  Pending a fix for that, this change retries the `mops sources` call up to a few times, with simple/naive backoff.

Example test failures:
- https://github.com/dfinity/sdk/actions/runs/6114033428/job/16595080284#step:10:111
- https://github.com/dfinity/sdk/actions/runs/6090058722/job/16524749754#step:10:108
- https://github.com/dfinity/sdk/actions/runs/5929218365/job/16076870508#step:10:109
- https://github.com/dfinity/sdk/actions/runs/5858605218/job/15883717915#step:10:107
- https://github.com/dfinity/sdk/actions/runs/6316833146/job/17152786799?pr=3391
---
 e2e/assets/playground_backend/dfx.json     |  2 +-
 e2e/assets/playground_backend/mops-sources | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100755 e2e/assets/playground_backend/mops-sources

diff --git a/e2e/assets/playground_backend/dfx.json b/e2e/assets/playground_backend/dfx.json
index dbae6de715..afdd89f86b 100644
--- a/e2e/assets/playground_backend/dfx.json
+++ b/e2e/assets/playground_backend/dfx.json
@@ -19,7 +19,7 @@
   "defaults": {
     "build": {
       "output": "build",
-      "packtool": "mops sources"
+      "packtool": "./mops-sources"
     }
   }
 }
\ No newline at end of file
diff --git a/e2e/assets/playground_backend/mops-sources b/e2e/assets/playground_backend/mops-sources
new file mode 100755
index 0000000000..56be5bd50a
--- /dev/null
+++ b/e2e/assets/playground_backend/mops-sources
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -e
+
+for i in 0 2 4 8 16 32; do
+  if [ $i -gt 0 ]; then
+    echo "retrying in $i seconds" 1>&2
+    sleep $i
+  fi
+
+  if output=$(mops sources); then
+    echo "$output"
+    exit 0
+  fi
+  echo "failed with output: $output" 1>&2
+done
+exit 1