Reworked install / uninstall

Hardened scripts a little, made them more distro agnostic

uninstall.sh

@@ -1,11 +1,61 @@
 #!/bin/bash
+set -euo pipefail
 
-readonly INSTALL_PATH="/root/.scripts"
-readonly USER_NAME="$(logname)"
-readonly USER_HOME=$(sudo -u $USER_NAME sh -c 'echo $HOME')
+#
+# This uninstall does NOT remove system packages. It only removes the hooks, aliases and scripts implemented by fix-opera's 'install.sh'.
+#
 
-rm /etc/apt/apt.conf.d/99fix-opera
-rm /usr/share/libalpm/hooks/fix-opera.hook
-rm /etc/dnf/plugins/post-transaction-actions.d/fix-opera.action
-sed -i '/alias fix-opera/d' $USER_HOME/.bashrc
-rm -rf $INSTALL_PATH
+INSTALL_PATH="/root/.scripts"
+
+# --- privilege check ---
+if [[ "$(id -u)" -ne 0 ]]; then
+    echo "Please run this script with sudo or as root"
+    exit 1
+fi
+
+# --- user resolution ---
+USER_NAME="${SUDO_USER:-$(logname)}"
+USER_HOME=$(getent passwd "$USER_NAME" | cut -d: -f6)
+
+# --- package manager detection ---
+detect_pkg_manager() {
+    if command -v apt-get >/dev/null 2>&1; then
+        PKG_MGR="apt"
+    elif command -v dnf >/dev/null 2>&1; then
+        PKG_MGR="dnf"
+    elif command -v pacman >/dev/null 2>&1; then
+        PKG_MGR="pacman"
+    else
+        PKG_MGR="unknown"
+    fi
+}
+
+remove_hook() {
+    case "$PKG_MGR" in
+        apt)
+            rm -f /etc/apt/apt.conf.d/99fix-opera
+            ;;
+        pacman)
+            rm -f /usr/share/libalpm/hooks/fix-opera.hook
+            ;;
+        dnf)
+            rm -f /etc/dnf/plugins/post-transaction-actions.d/fix-opera.action
+            ;;
+        *)
+            echo "No supported package manager hook to remove"
+            ;;
+    esac
+}
+
+detect_pkg_manager
+remove_hook
+
+# --- remove alias ---
+if [[ -f "$USER_HOME/.bashrc" ]]; then
+    sed -i '/alias fix-opera=.*Opera fix HTML5 media/d' "$USER_HOME/.bashrc"
+fi
+
+# --- remove installed files ---
+rm -rf "$INSTALL_PATH"
+
+echo "Opera Widevine fix has been removed."