prevent-sleep: Add desktop file

mason/packages/prevent-sleep.scm

@@ -16,9 +16,23 @@
     (build-system copy-build-system)
     (arguments
      '(#:install-plan
-       '(("prevent-sleep" "bin/"))))
-    (propagated-inputs
-      `(("yad" ,yad)))
+       '(("prevent-sleep" "bin/")
+         ("prevent-sleep.desktop" "share/applications/"))
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'configure
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (substitute* (list "prevent-sleep")
+               (("@YAD_PATH@")
+                (string-append (assoc-ref inputs "yad")
+                               "/bin")))
+             (substitute* (list "prevent-sleep.desktop")
+               (("@EXEC@")
+                (string-append (assoc-ref outputs "out")
+                               "/bin/prevent-sleep")))
+             #t)))))
+    (inputs
+       `(("yad" ,yad)))
     (synopsis "Prevent sleep")
     (description
      "Prevent sleep")

mason/packages/scripts/prevent-sleep/prevent-sleep

@@ -1,9 +1,24 @@
 #!/usr/bin/env bash
 
-gnome-session-inhibit --reason "$(whoami) said so..." \
-    --inhibit suspend \
-    yad --title "Prevent Suspend" \
-        --text "We will NOT sleep, unless you click \"OK\"!" \
-        --button=gtk-ok \
+REASON="$(whoami) said so..."
+TITLE="Prevent Suspend"
+TEXT="We will NOT sleep, unless you click \"OK\"!"
 
-echo "OK! Zzzzzzzz"
+YAD_INPUT="@YAD_PATH@/bin/yad"
+
+if command -v yad &> /dev/null; then
+    COMMAND=(yad --title "$TITLE" \
+            --text "$TEXT" \
+            --button=gtk-ok)
+elif command -v zenity &> /dev/null; then
+    COMMAND=(zenity --info --title "$TITLE" \
+                --text "$TEXT")
+elif [ -x $YAD_INPUT ]; then
+    COMMAND=($YAD_INPUT --title "$TITLE" \
+            --text "$TEXT" \
+            --button=gtk-ok)
+fi
+
+gnome-session-inhibit --reason "$REASON" \
+    --inhibit suspend \
+    "${COMMAND[@]}"

mason/packages/scripts/prevent-sleep/prevent-sleep.desktop

@@ -0,0 +1,6 @@
+[Desktop Entry]
+Type=Application
+Name=Suspend Inhibitor
+Icon=gnome-power-manager
+Exec=@EXEC@
+Terminal=false