BetterProgramming · December 29, 2020 16:03 · Dec 29, 2020
diff --git a/template.sh b/template.sh
@@ -0,0 +1,102 @@
+#!/usr/bin/env bash
+#: Your comments here.
+set -o errexit
+set -o nounset
+set -o pipefail
+work_dir=$(dirname "$(readlink --canonicalize-existing "${0}" 2> /dev/null)")
+readonly conf_file="${work_dir}/script.conf"
+readonly error_reading_conf_file=80
+readonly error_parsing_options=81
+readonly script_name="${0##*/}"
+a_option_flag=0
+abc_option_flag=0
+flag_option_flag=0
+trap clean_up ERR EXIT SIGINT SIGTERM
+usage() {
+    cat <<USAGE_TEXT
+Usage: ${script_name} [-h | --help] [-a <ARG>] [--abc <ARG>] [-f | --flag]
+DESCRIPTION
+    Your description here.
+OPTIONS:
+-h, --help
+        Print this help and exit.
+-f, --flag
+        Description for flag option.
+-a
+        Description for the -a option.
+--abc
+        Description for the --abc option.
+USAGE_TEXT
+}
+clean_up() {
+    trap - ERR EXIT SIGINT SIGTERM
+    # Remove temporary files/directories, log files or rollback changes.
+}
+die() {
+    local -r msg="${1}"
+    local -r code="${2:-90}"
+    echo "${msg}" >&2
+    exit "${code}"
+}
+if [[ ! -f "${conf_file}" ]]; then
+    die "error reading configuration file: ${conf_file}" "${error_reading_conf_file}"
+fi
+# shellcheck source=script.conf
+. "${conf_file}"
+parse_user_options() {
+    local -r args=("${@}")
+    local opts
+# The following code works perfectly for 
+    opts=$(getopt --options a:,f,h --long abc:,help,flag -- "${args[@]}" 2> /dev/null) || {
+        usage
+        die "error: parsing options" "${error_parsing_options}"
+    }
+eval set -- "${opts}"
+while true; do
+    case "${1}" in
+--abc)
+            abc_option_flag=1
+            readonly abc_arg="${2}"
+            shift
+            shift
+            ;;
+-a)
+            a_option_flag=1
+            readonly a_arg="${2}"
+            shift
+            shift
+            ;;
+--help|-h)
+            usage
+exit 0
+            shift
+            ;;
+--flag|-f)
+            flag_option_flag=1
+shift
+            ;;
+--)
+            shift
+            break
+            ;;
+        *)
+            break
+            ;;
+    esac
+    done
+}
+parse_user_options "${@}"
+if ((flag_option_flag)); then
+    echo "flag option set"
+fi
+if ((abc_option_flag)); then            # Check if the flag options are set or ON:
+    # Logic for when --abc is set.
+    # "${abc_arg}" should also be set.
+    echo "Using --abc option -> arg: [${abc_arg}]"
+fi
+if ((a_option_flag)); then
+    # Logic for when -a is set.
+    # "${a_arg}" should also be set.
+    echo "Using -a option -> arg: [${a_arg}]"
+fi
+exit 0