Reapply "Custom mix task to retry failed tests once in CI pipeline"

This reverts commit b281ad06de2de331450a5e319e3ba497071d4197.

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/mix/tasks/pleroma/test_runner.ex b/lib/mix/tasks/pleroma/test_runner.ex
new file mode 100644
index 000000000..69fefb001
--- /dev/null
+++ b/lib/mix/tasks/pleroma/test_runner.ex
@@ -0,0 +1,25 @@
+defmodule Mix.Tasks.Pleroma.TestRunner do
+  @shortdoc "Retries tests once if they fail"
+
+  use Mix.Task
+
+  def run(args \\ []) do
+    case System.cmd("mix", ["test"] ++ args, into: IO.stream(:stdio, :line)) do
+      {_, 0} ->
+        :ok
+
+      _ ->
+        retry(args)
+    end
+  end
+
+  def retry(args) do
+    case System.cmd("mix", ["test", "--failed"] ++ args, into: IO.stream(:stdio, :line)) do
+      {_, 0} ->
+        :ok
+
+      _ ->
+        exit(1)
+    end
+  end
+end