Merge pull request #54 from miguelgfierro/logger

Logger in red

Author: miguelgfierro

pretty_logger.sh

@@ -0,0 +1,42 @@
+# Script to display a log file with ERROR lines in red in the linux terminal.
+# It displays the latest 200 lines of the log file.
+# The log file has to exist.
+# It assumes that the errors are logged as for example: 
+# 2025-03-25 15:10:15 ERROR 'int' object has no attribute 'split'
+#
+# Usage:
+# sh pretty_logger.sh
+# sh pretty_logger.sh my_log_file.txt
+
+# Display help
+display_help() {
+  echo "Usage: $(basename "$0") [LOG_FILE] [-h|--help]"
+  echo
+  echo "Display a log file with ERROR lines highlighted in red"
+  echo
+  echo "Options:"
+  echo "  LOG_FILE    Path to log file (default: app.log)"
+  echo "  -h, --help  Display this help message and exit"
+  echo
+  echo "Example:"
+  echo "  $(basename "$0")                # Display app.log"
+  echo "  $(basename "$0") my_logs.log    # Display my_logs.log"
+  exit 0
+}
+
+# Check for help flag
+if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
+  display_help
+fi
+
+# Get the log file from command line argument or use default
+LOG_FILE="${1:-app.log}"
+
+# Check if the log file exists
+if [ ! -f "$LOG_FILE" ]; then
+  echo "\033[31mERROR: Log file '$LOG_FILE' does not exist.\033[0m"
+  echo "Run '$(basename "$0") --help' for usage information."
+  exit 1
+fi
+
+tail -n 200 -f "$LOG_FILE" | awk '/ERROR/{print "\033[31m" $0 "\033[0m"; next} {print $0}'