allow editing scripts

pkg/commands/npm_manager.go

@@ -190,3 +190,19 @@ func (m *NpmManager) EditDepConstraint(dep *Dependency, packageJsonPath string,
 
 	return ioutil.WriteFile(packageJsonPath, updatedConfig, 0644)
 }
+
+func (m *NpmManager) EditScript(scriptName string, packageJsonPath string, newName string, newCommand string) error {
+	config, err := ioutil.ReadFile(packageJsonPath)
+	if err != nil {
+		return err
+	}
+
+	updatedConfig := jsonparser.Delete(config, "scripts", scriptName)
+
+	updatedConfig, err = jsonparser.Set(updatedConfig, []byte(fmt.Sprintf("\"%s\"", newCommand)), "scripts", newName)
+	if err != nil {
+		return err
+	}
+
+	return ioutil.WriteFile(packageJsonPath, updatedConfig, 0644)
+}

pkg/gui/keybindings.go

@@ -433,6 +433,12 @@ func (gui *Gui) GetInitialKeybindings() []*Binding {
 			Handler:     gui.wrappedScriptHandler(gui.handleRemoveScript),
 			Description: "remove script from package.json",
 		},
+		{
+			ViewName:    "scripts",
+			Key:         gui.getKey("universal.edit"),
+			Handler:     gui.wrappedScriptHandler(gui.handleEditScript),
+			Description: "edit script",
+		},
 		{
 			ViewName:    "deps",
 			Key:         gui.getKey("universal.install"),

pkg/gui/scripts_panel.go

@@ -74,3 +74,13 @@ func (gui *Gui) wrappedScriptHandler(f func(*commands.Script) error) func(*gocui
 		return f(pkg)
 	})
 }
+
+func (gui *Gui) handleEditScript(script *commands.Script) error {
+	return gui.createPromptPanel(gui.getScriptsView(), "Script name:", script.Name, func(newName string) error {
+		return gui.createPromptPanel(gui.getScriptsView(), "Script command:", script.Command, func(newCommand string) error {
+			return gui.surfaceError(
+				gui.NpmManager.EditScript(script.Name, gui.currentPackage().ConfigPath(), newName, newCommand),
+			)
+		})
+	})
+}