supports referencing envs in hotkeys (#2420)

* supports referencing envs in hotkeys

* add testcase for hotkeys

* rename attr name to keepHistory

README.md

@@ -525,6 +525,12 @@ In order to surface hotkeys globally please follow these steps:
           shortCut:    Shift-2
           description: Xray Deployments
           command:     xray deploy
+        # Hitting Ctrl-U view the resources in the namespace of your current selection
+        ctrl-u:
+          shortCut:    Ctrl-U
+          description: Namespaced resources
+          command:     "$RESOURCE_NAME $NAMESPACE"
+          keepHistory: true # whether you can return to the previous view
       ```
 
  Not feeling so hot? Your custom hotkeys will be listed in the help view `?`.
@@ -532,6 +538,8 @@ In order to surface hotkeys globally please follow these steps:
 
  You can choose any keyboard shortcuts that make sense to you, provided they are not part of the standard K9s shortcuts list.
 
+ Similarly, referencing environment variables in hotkeys is also supported. The available environment variables can refer to the description in the [Plugins](#plugins) section.
+
 > NOTE: This feature/configuration might change in future releases!
 
 ---

internal/config/hotkey.go

@@ -19,6 +19,7 @@ type HotKey struct {
 	ShortCut    string `yaml:"shortCut"`
 	Description string `yaml:"description"`
 	Command     string `yaml:"command"`
+	KeepHistory bool   `yaml:"keepHistory"`
 }
 
 // NewHotKeys returns a new plugin.

internal/config/hotkey_test.go

@@ -21,4 +21,5 @@ func TestHotKeyLoad(t *testing.T) {
 	assert.Equal(t, "shift-0", k.ShortCut)
 	assert.Equal(t, "Launch pod view", k.Description)
 	assert.Equal(t, "pods", k.Command)
+	assert.Equal(t, true, k.KeepHistory)
 }

internal/config/testdata/hotkeys.yaml

@@ -3,3 +3,4 @@ hotKeys:
     shortCut: shift-0
     description: Launch pod view
     command: pods
+    keepHistory: true

internal/view/actions.go

@@ -74,16 +74,23 @@ func hotKeyActions(r Runner, aa ui.KeyActions) {
 			log.Warn().Err(fmt.Errorf("HOT-KEY Doh! you are trying to override an existing command `%s", k)).Msg("Invalid shortcut")
 			continue
 		}
+
+		command, err := r.EnvFn()().Substitute(hk.Command)
+		if err != nil {
+			log.Warn().Err(err).Msg("Invalid shortcut command")
+			continue
+		}
+
 		aa[key] = ui.NewSharedKeyAction(
 			hk.Description,
-			gotoCmd(r, hk.Command, ""),
+			gotoCmd(r, command, "", !hk.KeepHistory),
 			false)
 	}
 }
 
-func gotoCmd(r Runner, cmd, path string) ui.ActionHandler {
+func gotoCmd(r Runner, cmd, path string, clearStack bool) ui.ActionHandler {
 	return func(evt *tcell.EventKey) *tcell.EventKey {
-		r.App().gotoResource(cmd, path, true)
+		r.App().gotoResource(cmd, path, clearStack)
 		return nil
 	}
 }