refactor: theme_enable and create_desktop_shortcut in steps; make test skips the hardware test

lib/desktop-shortcut.sh

@@ -2,41 +2,46 @@
 # "Return to Gaming Mode" desktop shortcut and the sudoers rule it needs.
 # Sourced by steamify.sh; not meant to be run on its own.
 
-create_desktop_shortcut() {
-    # Determine the home directory of the target user
-    local user_home
+shortcut_desktop_dir() {
+    # The target user's Desktop folder, from their user-dirs.dirs.
+    local user_home desktop_dir
     user_home="$(getent passwd "$TARGET_USER" | cut -d: -f6)"
-
-    # Locate the correct Desktop directory
-    local desktop_dir
     if [[ -f "$user_home/.config/user-dirs.dirs" ]]; then
         desktop_dir=$(grep '^XDG_DESKTOP_DIR=' "$user_home/.config/user-dirs.dirs" | cut -d '"' -f 2)
         desktop_dir="${desktop_dir/\$HOME/$user_home}"
     fi
-    desktop_dir="${desktop_dir:-$user_home/Desktop}"
+    echo "${desktop_dir:-$user_home/Desktop}"
+}
 
+shortcut_install_sudoers() {
+    # plasma-login-manager needs the sync bridge run and a restart, which the
+    # shortcut can't sudo for interactively (Terminal=false), so it gets a
+    # password-less rule scoped to exactly those two commands.
+    local sudoers_tmp
+    sudoers_tmp="$(mktemp)"
+    cat > "$sudoers_tmp" << EOF
+$TARGET_USER ALL=(root) NOPASSWD: /usr/bin/systemctl start sync-steamos-session.service, /usr/bin/systemctl restart plasmalogin
+EOF
+    if sudo visudo -cf "$sudoers_tmp" >/dev/null; then
+        sudo install -m 0440 -o root -g root "$sudoers_tmp" /etc/sudoers.d/gamescope-session-switch
+        ok "Installed /etc/sudoers.d/gamescope-session-switch for the shortcut."
+    else
+        warn "Generated sudoers rule failed validation; the shortcut will not be able to restart plasmalogin."
+    fi
+    rm -f "$sudoers_tmp"
+}
+
+create_desktop_shortcut() {
+    local desktop_dir
+    desktop_dir="$(shortcut_desktop_dir)"
     mkdir -p "$desktop_dir"
 
     # On SDDM, steamos-session-select logging out is enough: Relogin=true
     # logs straight back in to the newly selected session, like SteamOS.
-    # plasma-login-manager needs the sync bridge run and a restart, which
-    # the shortcut can't sudo for interactively (Terminal=false), so it gets
-    # a password-less rule scoped to exactly those two commands.
     local exec_line="steamos-session-select gamescope"
     if [[ "$LOGIN_MANAGER" == "plasmalogin" ]]; then
         exec_line="sh -c 'steamos-session-select gamescope && sudo -n /usr/bin/systemctl start sync-steamos-session.service && sudo -n /usr/bin/systemctl restart plasmalogin'"
-        local sudoers_tmp
-        sudoers_tmp="$(mktemp)"
-        cat > "$sudoers_tmp" << EOF
-$TARGET_USER ALL=(root) NOPASSWD: /usr/bin/systemctl start sync-steamos-session.service, /usr/bin/systemctl restart plasmalogin
-EOF
-        if sudo visudo -cf "$sudoers_tmp" >/dev/null; then
-            sudo install -m 0440 -o root -g root "$sudoers_tmp" /etc/sudoers.d/gamescope-session-switch
-            ok "Installed /etc/sudoers.d/gamescope-session-switch for the shortcut."
-        else
-            warn "Generated sudoers rule failed validation; the shortcut will not be able to restart plasmalogin."
-        fi
-        rm -f "$sudoers_tmp"
+        shortcut_install_sudoers
     else
         sudo rm -f /etc/sudoers.d/gamescope-session-switch
     fi
@@ -49,11 +54,11 @@ EOF
     [[ -f /usr/local/share/icons/hicolor/scalable/actions/gaming-return.svg ]] &&
         shortcut_icon="gaming-return"
 
-    # 2. Generate the .desktop shortcut with instant session switcher strings
     local shortcut_path="$desktop_dir/Return to Gaming Mode.desktop"
     info "Creating 'Return to Gaming Mode' desktop shortcut at: $shortcut_path"
-
-    cat << EOF > "$shortcut_path"
+    # Written with its mode already set: Plasma opens a desktop icon it first
+    # saw non-executable in an editor.
+    install_executable "$shortcut_path" 755 << EOF
 [Desktop Entry]
 Name=Return to Gaming Mode
 Comment=Switch session back to Gamescope
@@ -63,10 +68,6 @@ Terminal=false
 Type=Application
 Categories=System;
 EOF
-
-    # Fix permissions for the target user and KDE Plasma desktop ecosystem
-    chmod +x "$shortcut_path"
-
     ok "Desktop shortcut created successfully."
 }