fix: use existing executable or unversioned python

README.md

@@ -57,8 +57,8 @@ Below is an example `/slack.json` file that overrides the default `start`:
 ```json
 {
   "hooks": {
-    "get-hooks": "python3 -m slack_cli_hooks.hooks.get_hooks",
-    "start": "python3 app.py"
+    "get-hooks": "python -m slack_cli_hooks.hooks.get_hooks",
+    "start": "python app.py"
   }
 }
 ```

slack_cli_hooks/hooks/get_hooks.py

@@ -7,7 +7,10 @@
 PROTOCOL: Protocol
 
 # Wrap sys.executable in quotes to prevent execution failures if a white space is present in the absolute python path
-EXEC = f"'{sys.executable}'" or "python3"
+if sys.executable:
+    EXEC = f"& '{sys.executable}'" if sys.platform == "win32" else f"'{sys.executable}'"
+else:
+    EXEC = "python"
 
 
 hooks_payload = {

tests/slack_cli_hooks/hooks/test_get_hooks.py

@@ -1,7 +1,27 @@
+import importlib
+import sys
+from unittest.mock import patch
+
+from slack_cli_hooks.hooks import get_hooks
 from slack_cli_hooks.hooks.get_hooks import hooks_payload
 
 
 class TestGetHooks:
+    def test_exec_uses_sys_executable(self):
+        with patch.object(sys, "executable", "/usr/bin/python3"), patch.object(sys, "platform", "linux"):
+            importlib.reload(get_hooks)
+            assert get_hooks.EXEC == "'/usr/bin/python3'"
+
+    def test_exec_uses_call_operator_on_windows(self):
+        with patch.object(sys, "executable", "C:\\Python\\python.exe"), patch.object(sys, "platform", "win32"):
+            importlib.reload(get_hooks)
+            assert get_hooks.EXEC == "& 'C:\\Python\\python.exe'"
+
+    def test_exec_falls_back_to_python_when_sys_executable_is_empty(self):
+        with patch.object(sys, "executable", ""):
+            importlib.reload(get_hooks)
+            assert get_hooks.EXEC == "python"
+
     def test_hooks_payload(self):
         hooks = hooks_payload["hooks"]