feat(custom command): support multiple contexts within one command (#3784)

- **PR Description**

For some custom commands, they can be used in multiple contexts. But for
now, if we want to do this, we should copy and paste the same config
times and times with just a different **context**.

Related issue: #3759 

This PR makes it possible to use multiple contexts in the `context` field of 
`customCommand`, separated by comma.

docs/Custom_Command_Keybindings.md

@@ -87,6 +87,11 @@ The permitted contexts are:
 | stash          | The 'Stash' tab                                                                                          |
 | global         | This keybinding will take affect everywhere                                                              |
 
+> **Bonus**
+>
+> You can use a comma-separated string, such as `context: 'commits, subCommits'`, to make it effective in multiple contexts.
+
+
 ## Prompts
 
 ### Common fields

pkg/gui/services/custom_commands/client.go

@@ -39,11 +39,11 @@ func (self *Client) GetCustomCommandKeybindings() ([]*types.Binding, error) {
 	bindings := []*types.Binding{}
 	for _, customCommand := range self.customCommands {
 		handler := self.handlerCreator.call(customCommand)
-		binding, err := self.keybindingCreator.call(customCommand, handler)
+		compoundBindings, err := self.keybindingCreator.call(customCommand, handler)
 		if err != nil {
 			return nil, err
 		}
-		bindings = append(bindings, binding)
+		bindings = append(bindings, compoundBindings...)
 	}
 
 	return bindings, nil

pkg/gui/services/custom_commands/keybinding_creator.go

@@ -24,12 +24,12 @@ func NewKeybindingCreator(c *helpers.HelperCommon) *KeybindingCreator {
 	}
 }
 
-func (self *KeybindingCreator) call(customCommand config.CustomCommand, handler func() error) (*types.Binding, error) {
+func (self *KeybindingCreator) call(customCommand config.CustomCommand, handler func() error) ([]*types.Binding, error) {
 	if customCommand.Context == "" {
 		return nil, formatContextNotProvidedError(customCommand)
 	}
 
-	viewName, err := self.getViewNameAndContexts(customCommand)
+	viewNames, err := self.getViewNamesAndContexts(customCommand)
 	if err != nil {
 		return nil, err
 	}
@@ -39,27 +39,38 @@ func (self *KeybindingCreator) call(customCommand config.CustomCommand, handler
 		description = customCommand.Command
 	}
 
-	return &types.Binding{
-		ViewName:    viewName,
-		Key:         keybindings.GetKey(customCommand.Key),
-		Modifier:    gocui.ModNone,
-		Handler:     handler,
-		Description: description,
-	}, nil
+	return lo.Map(viewNames, func(viewName string, _ int) *types.Binding {
+		return &types.Binding{
+			ViewName:    viewName,
+			Key:         keybindings.GetKey(customCommand.Key),
+			Modifier:    gocui.ModNone,
+			Handler:     handler,
+			Description: description,
+		}
+	}), nil
 }
 
-func (self *KeybindingCreator) getViewNameAndContexts(customCommand config.CustomCommand) (string, error) {
+func (self *KeybindingCreator) getViewNamesAndContexts(customCommand config.CustomCommand) ([]string, error) {
 	if customCommand.Context == "global" {
-		return "", nil
+		return []string{""}, nil
 	}
 
-	ctx, ok := self.contextForContextKey(types.ContextKey(customCommand.Context))
-	if !ok {
-		return "", formatUnknownContextError(customCommand)
+	contexts := strings.Split(customCommand.Context, ",")
+	contexts = lo.Map(contexts, func(context string, _ int) string {
+		return strings.TrimSpace(context)
+	})
+
+	viewNames := []string{}
+	for _, context := range contexts {
+		ctx, ok := self.contextForContextKey(types.ContextKey(context))
+		if !ok {
+			return []string{}, formatUnknownContextError(customCommand)
+		}
+
+		viewNames = append(viewNames, ctx.GetViewName())
 	}
 
-	viewName := ctx.GetViewName()
-	return viewName, nil
+	return viewNames, nil
 }
 
 func (self *KeybindingCreator) contextForContextKey(contextKey types.ContextKey) (types.Context, bool) {

pkg/integration/tests/custom_commands/global_context.go

@@ -0,0 +1,61 @@
+package custom_commands
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var GlobalContext = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Ensure global context works",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupRepo: func(shell *Shell) {
+		shell.EmptyCommit("my change")
+	},
+	SetupConfig: func(cfg *config.AppConfig) {
+		cfg.UserConfig.CustomCommands = []config.CustomCommand{
+			{
+				Key:        "X",
+				Context:    "global",
+				Command:    "touch myfile",
+				ShowOutput: false,
+			},
+		}
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		// commits
+		t.Views().Commits().
+			Focus().
+			Press("X")
+
+		t.Views().Files().
+			Focus().
+			Lines(Contains("myfile"))
+
+		t.Shell().DeleteFile("myfile")
+		t.GlobalPress(keys.Files.RefreshFiles)
+
+		// branches
+		t.Views().Branches().
+			Focus().
+			Press("X")
+
+		t.Views().Files().
+			Focus().
+			Lines(Contains("myfile"))
+
+		t.Shell().DeleteFile("myfile")
+		t.GlobalPress(keys.Files.RefreshFiles)
+
+		// files
+		t.Views().Files().
+			Focus().
+			Press("X")
+
+		t.Views().Files().
+			Focus().
+			Lines(Contains("myfile"))
+
+		t.Shell().DeleteFile("myfile")
+	},
+})

pkg/integration/tests/custom_commands/multiple_contexts.go

@@ -0,0 +1,58 @@
+package custom_commands
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var MultipleContexts = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Test that multiple contexts works",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupRepo: func(shell *Shell) {
+		shell.EmptyCommit("my change")
+	},
+	SetupConfig: func(cfg *config.AppConfig) {
+		cfg.UserConfig.CustomCommands = []config.CustomCommand{
+			{
+				Key:        "X",
+				Context:    "commits, reflogCommits",
+				Command:    "touch myfile",
+				ShowOutput: false,
+			},
+		}
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		// commits
+		t.Views().Commits().
+			Focus().
+			Press("X")
+
+		t.Views().Files().
+			Focus().
+			Lines(Contains("myfile"))
+
+		t.Shell().DeleteFile("myfile")
+		t.GlobalPress(keys.Files.RefreshFiles)
+
+		// branches
+		t.Views().Branches().
+			Focus().
+			Press("X")
+
+		t.Views().Files().
+			Focus().
+			IsEmpty()
+
+		// files
+		t.Views().ReflogCommits().
+			Focus().
+			Press("X")
+
+		t.Views().Files().
+			Focus().
+			Lines(Contains("myfile"))
+
+		t.Shell().DeleteFile("myfile")
+	},
+})

pkg/integration/tests/test_list.go

@@ -122,9 +122,11 @@ var tests = []*components.IntegrationTest{
 	custom_commands.DeleteFromHistory,
 	custom_commands.EditHistory,
 	custom_commands.FormPrompts,
+	custom_commands.GlobalContext,
 	custom_commands.History,
 	custom_commands.MenuFromCommand,
 	custom_commands.MenuFromCommandsOutput,
+	custom_commands.MultipleContexts,
 	custom_commands.MultiplePrompts,
 	custom_commands.OmitFromHistory,
 	custom_commands.ShowOutputInPanel,