From f95f3c24f76103c99a21f85fe81b52cf71bc2d15 Mon Sep 17 00:00:00 2001
From: Tim Hockin <thockin@google.com>
Date: Sat, 18 Feb 2023 15:01:21 -0800
Subject: [PATCH] e2e: print failing line

---
 test_e2e.sh | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/test_e2e.sh b/test_e2e.sh
index b59f895..1a72d33 100755
--- a/test_e2e.sh
+++ b/test_e2e.sh
@@ -18,8 +18,25 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
+function caller() {
+  local stack_skip=${1:-0}
+  stack_skip=$((stack_skip + 1))
+  if [[ ${#FUNCNAME[@]} -gt ${stack_skip} ]]; then
+    local i
+    for ((i=1 ; i <= ${#FUNCNAME[@]} - stack_skip ; i++))
+    do
+      local frame_no=$((i - 1 + stack_skip))
+      local source_lineno=${BASH_LINENO[$((frame_no - 1))]}
+      local funcname=${FUNCNAME[${frame_no}]}
+      if [[ "$funcname" =~ 'e2e::' ]]; then
+          echo "${source_lineno}"
+      fi
+    done
+  fi
+}
+
 function fail() {
-    echo "FAIL:" "$@"
+    echo "FAIL: line $(caller):" "$@"
     return 42
 }