Prepare macOS package and improve output handling

radioeins-top100.command

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+set -u
+
+SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
+
+pause_on_exit() {
+    printf '\nPress Return to close this window...'
+    read -r _
+}
+trap pause_on_exit EXIT
+
+fail() {
+    printf '\nError: %s\n' "$1" >&2
+    exit 1
+}
+
+cd "$SCRIPT_DIR" || fail "Could not open the project directory."
+
+[ -f ".venv/bin/activate" ] || fail \
+    "The virtual environment is missing. Run install.command first."
+
+# shellcheck disable=SC1091
+. ".venv/bin/activate"
+
+printf 'Enter the radioeins Top-100 overview URL:\n> '
+IFS= read -r OVERVIEW_URL
+[ -n "$OVERVIEW_URL" ] || fail "The URL must not be empty."
+
+OUTPUT_DIR="$(python -c 'import sys; from radioeins_top100 import derive_output_dir; print(derive_output_dir(sys.argv[1]).resolve())' "$OVERVIEW_URL")" || fail \
+    "Could not determine the output directory."
+
+printf '\nStarting evaluation...\n\n'
+python radioeins_top100.py "$OVERVIEW_URL"
+STATUS=$?
+
+printf '\nOutput directory: %s\n' "$OUTPUT_DIR"
+if [ "$STATUS" -eq 0 ]; then
+    printf 'Evaluation completed successfully.\n'
+else
+    printf 'Evaluation finished with errors (exit code %s).\n' "$STATUS" >&2
+fi
+
+exit "$STATUS"