Parse flag-like inputs as literal names

.local/bin/run0edit

@@ -0,0 +1,81 @@
+#! /usr/bin/bash
+
+set -euo pipefail
+IFS=$'\n\t'
+
+default_editor() {
+    if [ -n "${SUDO_EDITOR+set}" ]; then
+        echo "${SUDO_EDITOR}"
+    elif [ -n "${VISUAL+set}" ]; then
+        echo "${VISUAL}"
+    elif [ -n "${EDITOR+set}" ]; then
+        echo "${EDITOR}"
+    else
+        echo "No editor configured" 1>&2
+        exit 1
+    fi
+}
+
+try_command() {
+    if "$@" 2> /dev/null; then
+        return
+    elif run0 "$@" > /dev/null; then
+        return
+    else
+        exit 2
+    fi
+}
+
+make_editable_copy() {
+    orig_file="$1"
+    tempfile="$2"
+
+    try_command cp -- "${orig_file}" "${tempfile}"
+}
+
+elevate_permissions() {
+    tempfile="$1"
+    orig_file="$2"
+
+    try_command chown --reference "${orig_file}" "${tempfile}"
+    try_command chmod --reference "${orig_file}" "${tempfile}"
+}
+
+update_file() {
+    tempfile="$1"
+    orig_file="$2"
+
+    try_command mv --force -- "${tempfile}" "${orig_file}"
+}
+
+clean_tempfiles() {
+    tempfile="$1"
+
+    rm --force -- "${tempfile}" "${tempfile}.orig"
+}
+
+if [ "$#" -ne "1" ]; then
+    echo "Expected exactly one input file. Usage:" 1>&2
+    echo "   $0 FILE" 1>&2
+    exit 1;
+fi
+
+editor_cmd="$(default_editor)"
+echo "Editing using the command \"${editor_cmd}\""
+
+IFS=' ' read -r -a editor <<< "${editor_cmd}"
+
+orig_file="$1"
+tempfile="$(mktemp)"
+echo "Using temporary file ${tempfile}"
+make_editable_copy "${orig_file}" "${tempfile}"
+cp "${tempfile}" "${tempfile}.orig"
+"${editor[@]}" "${tempfile}"
+if cmp --quiet "${tempfile}" "${tempfile}.orig"; then
+    echo "No change to file"
+else
+    elevate_permissions "${tempfile}" "${orig_file}"
+    update_file "${tempfile}" "${orig_file}"
+fi
+
+clean_tempfiles "${tempfile}"

.local/bin/sudoedit

@@ -0,0 +1 @@
+run0edit