EngineScript
diff --git a/‎CHANGELOG.md‎
Lines changed: 7 additions & 0 deletions b/‎CHANGELOG.md‎
Lines changed: 7 additions & 0 deletions
diff --git a/‎scripts/ci/run-install-step.sh‎
Lines changed: 3 additions & 6 deletions b/‎scripts/ci/run-install-step.sh‎
Lines changed: 3 additions & 6 deletions
@@ -6,6 +6,13 @@ Changes are organized by date, with the most recent changes listed first.
 
 ## 2026-04-10
 
+### 🔧 CI SCRIPT PORTABILITY AND MEMORY IMPROVEMENTS
+
+- Replaced bash 4.0+ `${5,,}` lowercase expansion in `scripts/ci/run-install-step.sh` with `$(printf '%s' "$5" | tr '[:upper:]' '[:lower:]')` for compatibility with older bash versions.
+- Removed intermediate `TAIL_OUTPUT` variable in `scripts/ci/run-install-step.sh`; `tail` output is now piped directly to stdout, avoiding unnecessary memory consumption for large log files.
+
+## 2026-04-10
+
 ### 🔧 VHOST IMPORT CODE QUALITY IMPROVEMENTS
 
 - Added explicit `return` statement at the end of `run_url_search_replace_if_present` in `scripts/functions/vhost/vhost-import.sh` to satisfy shell best-practice linting (SC2151/explicit-return warning).
 
@@ -11,7 +11,7 @@ COMPONENT_NAME="$1"
 TIMEOUT_SECONDS="$2"
 INSTALL_SCRIPT_PATH="$3"
 LOG_PATH="$4"
-EXPECTED_SCRIPT_SHA256="${5,,}"
+EXPECTED_SCRIPT_SHA256="$(printf '%s' "$5" | tr '[:upper:]' '[:lower:]')"
 INTEGER_REGEX='^[0-9]+$'
 SHA256_REGEX='^[a-f0-9]{64}$'
 LOG_TAIL_LINES=50
@@ -153,11 +153,8 @@ if [ "$SCRIPT_EXIT_CODE" -ne 0 ]; then
   fi
   echo "Script end time: $(date)" >> "$LOG_PATH"
   echo "Last ${LOG_TAIL_LINES} lines of output:"
-  TAIL_OUTPUT="$(tail -n "$LOG_TAIL_LINES" "$LOG_PATH" 2>/dev/null)"
-  TAIL_EXIT_CODE=$?
-  if [ "$TAIL_EXIT_CODE" -eq 0 ]; then
-    printf '%s\n' "$TAIL_OUTPUT"
-  else
+  if ! tail -n "$LOG_TAIL_LINES" "$LOG_PATH" 2>/dev/null; then
+    TAIL_EXIT_CODE=$?
     echo "Failed to display log file contents: $LOG_PATH"
     echo "tail failed with exit code: $TAIL_EXIT_CODE"
   fi