From 79d4f09e9ddd169b32948c6e74c788676d769e4c Mon Sep 17 00:00:00 2001
From: Matthew Stidham <stidmatt@gmail.com>
Date: Thu, 11 Nov 2021 14:12:19 -0800
Subject: [PATCH] Explain logic for parsing output of command

Signed-off-by: Matthew Stidham <stidmatt@gmail.com>
---
 py-scripts/regression_test.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/py-scripts/regression_test.sh b/py-scripts/regression_test.sh
index 2f27f3f7..ffbb2dd5 100755
--- a/py-scripts/regression_test.sh
+++ b/py-scripts/regression_test.sh
@@ -494,6 +494,8 @@ function test() {
   echo_print
   echo "$testcommand"
   start=$(date +%s)
+  # this command saves stdout and stderr to the stdout file, and has a special file for stderr text.
+  # Modified from https://unix.stackexchange.com/a/364176/327076
   { eval "$testcommand" 2>&1 >&3 3>&- | tee "${TEST_DIR}/${NAME}_stderr.txt" 3>&-; } > "${TEST_DIR}/${NAME}.txt" 3>&1
   chmod 664 "${TEST_DIR}/${NAME}.txt"
   FILESIZE=$(stat -c%s "${TEST_DIR}/${NAME}_stderr.txt") || 0