scratchpads: add the "lazy" option (closes #5)

README.md

@@ -320,12 +320,16 @@ number of pixels for the animation.
 
 #### `unfocus` (optional)
 
-allow to hide the window when the focus is lost when set to "hide"
+when set to `true`, allow to hide the window when the focus is lost when set to "hide"
 
 #### `margin` (optional)
 
 number of pixels separating the scratchpad from the screen border
 
+#### `lazy` (optional)
+
+when set to `true`, prevents the command from being started when pypr starts, it will be started when the scratchpad is first used instead.
+
 # Changelog
 
 - Add `expose` addon

pyprland/plugins/scratchpads.py

@@ -147,7 +147,8 @@ class Extension(Plugin):
 
         # not known yet
         for name in new_scratches:
-            self.start_scratch_command(name)
+            if not self.scratches[name].conf.get("lazy", False):
+                self.start_scratch_command(name)
 
     def start_scratch_command(self, name: str) -> None:
         self._respawned_scratches.add(name)
@@ -290,7 +291,8 @@ class Extension(Plugin):
 
         if not item.isAlive():
             print(f"{uid} is not running, restarting...")
-            self.procs[uid].kill()
+            if uid in self.procs:
+                self.procs[uid].kill()
             if item.pid in self.scratches_by_pid:
                 del self.scratches_by_pid[item.pid]
             if item.address in self.scratches_by_address: