From 771b5f32c376f921eec8ed2a0dfc4c3f8120a760 Mon Sep 17 00:00:00 2001
From: Wojtek Zieba <wojtek.zieba@automattic.com>
Date: Fri, 2 Aug 2024 13:19:37 +0200
Subject: [PATCH] Introduce `merge_junit` script

To improve performance of Android unit tests collection. Originated it https://github.com/woocommerce/woocommerce-android/pull/12064
---
 bin/merge_junit.sh | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100755 bin/merge_junit.sh

diff --git a/bin/merge_junit.sh b/bin/merge_junit.sh
new file mode 100755
index 00000000..b4935373
--- /dev/null
+++ b/bin/merge_junit.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# Initialize variables
+reports_dir=""
+output_file=""
+
+# Function to show usage
+usage() {
+    echo "Usage: $0 -d <reports_dir> -o <output_file>"
+    exit 1
+}
+
+# Parse command-line options
+while getopts "d:o:" opt; do
+    case $opt in
+        d) reports_dir=$OPTARG ;;
+        o) output_file=$OPTARG ;;
+        ?) usage ;;
+    esac
+done
+
+# Check if both arguments were provided
+if [ -z "$reports_dir" ] || [ -z "$output_file" ]; then
+    usage
+fi
+
+# Write XML header to the output file
+echo '<?xml version="1.0" encoding="UTF-8"?>' > "$output_file"
+echo '<testsuites>' >> "$output_file"
+
+# Merge the content of all input JUnit files in the directory.
+# (Note that in the case of Unit Tests, the JUnit XML files produced by Gradle
+# don't have a parent `<testsuites>` root tag, so there's no need to try and remove it)
+sed '/<\?xml .*\?>/d' "$reports_dir"/*.xml >> "$output_file"
+
+# Close the testsuites tag
+echo '</testsuites>' >> "$output_file"
+
+# Print the result
+echo "Merged XML reports into $output_file"