Enable community nodes based on npm availability

packages/cli/src/Interfaces.ts

@@ -516,6 +516,7 @@ export interface IN8nUISettings {
 	missingPackages?: boolean;
 	executionMode: 'regular' | 'queue';
 	communityNodesEnabled: boolean;
+	isNpmAvailable: boolean;
 }
 
 export interface IPersonalizationSurveyAnswers {

packages/cli/src/Server.ts

@@ -33,6 +33,7 @@
 import express from 'express';
 import { readFileSync, promises } from 'fs';
 import { readFile } from 'fs/promises';
+import { exec as callbackExec } from 'child_process';
 import _, { cloneDeep } from 'lodash';
 import { dirname as pathDirname, join as pathJoin, resolve as pathResolve } from 'path';
 import {
@@ -86,6 +87,7 @@ import jwks from 'jwks-rsa';
 import timezones from 'google-timezones-json';
 import parseUrl from 'parseurl';
 import promClient, { Registry } from 'prom-client';
+import { promisify } from 'util';
 import * as Queue from './Queue';
 import {
 	ActiveExecutions,
@@ -167,6 +169,8 @@ import { loadPublicApiVersions } from './PublicApi';
 
 require('body-parser-xml')(bodyParser);
 
+const exec = promisify(callbackExec);
+
 export const externalHooks: IExternalHooksClass = ExternalHooks();
 
 class App {
@@ -330,6 +334,7 @@ class App {
 			onboardingCallPromptEnabled: config.getEnv('onboardingCallPrompt.enabled'),
 			executionMode: config.getEnv('executions.mode'),
 			communityNodesEnabled: config.getEnv('nodes.communityPackages.enabled'),
+			isNpmAvailable: false,
 		};
 	}
 
@@ -374,6 +379,10 @@ class App {
 			promClient.collectDefaultMetrics({ register });
 		}
 
+		this.frontendSettings.isNpmAvailable = await exec('npm --version')
+			.then(() => true)
+			.catch(() => false);
+
 		this.versions = await GenericHelpers.getVersions();
 		this.frontendSettings.versionCli = this.versions.cli;
 

packages/editor-ui/src/Interface.ts

@@ -719,6 +719,7 @@ export interface IN8nUISettings {
 	};
 	executionMode: string;
 	communityNodesEnabled: boolean;
+	isNpmAvailable: boolean;
 	publicApi: {
 		enabled: boolean;
 		latestVersion: number;
@@ -881,6 +882,7 @@ export interface IRootState {
 	sidebarMenuItems: IMenuItem[];
 	instanceId: string;
 	nodeMetadata: {[nodeName: string]: INodeMetadata};
+	isNpmAvailable: boolean;
 }
 
 export interface ICommunityPackageMap {

packages/editor-ui/src/constants.ts

@@ -63,6 +63,7 @@ export const NPM_PACKAGE_DOCS_BASE_URL = `https://www.npmjs.com/package/`;
 export const NPM_KEYWORD_SEARCH_URL = `https://www.npmjs.com/search?q=keywords%3An8n-community-node-package`;
 export const N8N_QUEUE_MODE_DOCS_URL = `https://docs.n8n.io/hosting/scaling/queue-mode/`;
 export const COMMUNITY_NODES_INSTALLATION_DOCS_URL = `https://docs.n8n.io/integrations/community-nodes/installation/`;
+export const COMMUNITY_NODES_NPM_INSTALLATION_URL = 'https://docs.npmjs.com/downloading-and-installing-node-js-and-npm';
 export const COMMUNITY_NODES_RISKS_DOCS_URL = `https://docs.n8n.io/integrations/community-nodes/risks/`;
 export const COMMUNITY_NODES_BLOCKLIST_DOCS_URL = `https://docs.n8n.io/integrations/community-nodes/blocklist/`;
 export const CUSTOM_NODES_DOCS_URL = `https://docs.n8n.io/integrations/creating-nodes/code/create-n8n-nodes-module/`;

packages/editor-ui/src/modules/settings.ts

@@ -90,6 +90,9 @@ const module: Module<ISettingsState, IRootState> = {
 		isCommunityNodesFeatureEnabled: (state): boolean => {
 			return state.settings.communityNodesEnabled;
 		},
+		isNpmAvailable: (state): boolean => {
+			return state.settings.isNpmAvailable;
+		},
 		isQueueModeEnabled: (state): boolean => {
 			return state.settings.executionMode === 'queue';
 		},
@@ -138,6 +141,7 @@ const module: Module<ISettingsState, IRootState> = {
 			context.commit('setOauthCallbackUrls', settings.oauthCallbackUrls, {root: true});
 			context.commit('setN8nMetadata', settings.n8nMetadata || {}, {root: true});
 			context.commit('setDefaultLocale', settings.defaultLocale, {root: true});
+			context.commit('setIsNpmAvailable', settings.isNpmAvailable, {root: true});
 			context.commit('versions/setVersionNotificationSettings', settings.versionNotifications, {root: true});
 			context.commit('setCommunityNodesFeatureEnabled', settings.communityNodesEnabled === true);
 		},

packages/editor-ui/src/plugins/i18n/locales/en.json

@@ -725,6 +725,7 @@
 	"settings.communityNodes.empty.description.no-packages": "Install node packages contributed by our community. <br /><a href=\"{docURL}\" target=\"_blank\" title=\"Read the n8n docs\">More info</a>",
 	"settings.communityNodes.empty.installPackageLabel": "Install a community node",
 	"settings.communityNodes.queueMode.warning": "You need to install community nodes manually because your instance is running in queue mode. <a href=\"{docURL}\" target=\"_blank\" title=\"Read the n8n docs\">More info</a>",
+	"settings.communityNodes.npmUnavailable.warning": "To use this feature, please <a href=\"{npmUrl}\" target=\"_blank\" title=\"How to install npm\">install npm</a> and restart n8n.",
 	"settings.communityNodes.packageNodes.label": "{count} node | {count} nodes",
 	"settings.communityNodes.updateAvailable.tooltip": "A newer version is available",
 	"settings.communityNodes.viewDocsAction.label": "Documentation",

packages/editor-ui/src/store.ts

@@ -84,6 +84,7 @@ const state: IRootState = {
 	selectedNodes: [],
 	sessionId: Math.random().toString(36).substring(2, 15),
 	urlBaseWebhook: 'http://localhost:5678/',
+	isNpmAvailable: false,
 	workflow: {
 		id: PLACEHOLDER_EMPTY_WORKFLOW_ID,
 		name: '',
@@ -600,6 +601,9 @@ export const store = new Vuex.Store({
 		setDefaultLocale(state, locale: string) {
 			Vue.set(state, 'defaultLocale', locale);
 		},
+		setIsNpmAvailable(state, isNpmAvailable: boolean) {
+			Vue.set(state, 'isNpmAvailable', isNpmAvailable);
+		},
 		setActiveNode(state, nodeName: string) {
 			state.activeNode = nodeName;
 		},

packages/editor-ui/src/views/SettingsCommunityNodesView.vue

@@ -36,7 +36,11 @@
 				<n8n-action-box
 					:heading="$locale.baseText('settings.communityNodes.empty.title')"
 					:description="getEmptyStateDescription"
-					:buttonText="$locale.baseText('settings.communityNodes.empty.installPackageLabel')"
+					:buttonText="
+						isNpmAvailable
+							? $locale.baseText('settings.communityNodes.empty.installPackageLabel')
+							: ''
+					"
 					:calloutText="actionBoxConfig.calloutText"
 					:calloutTheme="actionBoxConfig.calloutTheme"
 					@click="openInstallModal"
@@ -63,7 +67,11 @@ import SettingsView from './SettingsView.vue';
 import CommunityPackageCard from '../components/CommunityPackageCard.vue';
 import { showMessage } from '@/components/mixins/showMessage';
 import mixins from 'vue-typed-mixins';
-import { COMMUNITY_PACKAGE_INSTALL_MODAL_KEY, COMMUNITY_NODES_INSTALLATION_DOCS_URL } from '../constants';
+import {
+	COMMUNITY_PACKAGE_INSTALL_MODAL_KEY,
+	COMMUNITY_NODES_INSTALLATION_DOCS_URL,
+	COMMUNITY_NODES_NPM_INSTALLATION_URL,
+} from '../constants';
 import { PublicInstalledPackage } from 'n8n-workflow';
 
 const PACKAGE_COUNT_THRESHOLD = 31;
@@ -123,7 +131,7 @@ export default mixins(
 		}
 	},
 	computed: {
-		...mapGetters('settings', ['isQueueModeEnabled']),
+		...mapGetters('settings', ['isNpmAvailable', 'isQueueModeEnabled']),
 		...mapGetters('communityNodes', ['getInstalledPackages']),
 		getEmptyStateDescription() {
 			const packageCount = this.$store.getters['communityNodes/availablePackageCount'];
@@ -141,13 +149,29 @@ export default mixins(
 				});
 		},
 		actionBoxConfig() {
-			return this.isQueueModeEnabled ? {
-				calloutText: this.$locale.baseText('settings.communityNodes.queueMode.warning', {
-					interpolate: { docURL: COMMUNITY_NODES_INSTALLATION_DOCS_URL },
-				}),
-				calloutTheme: 'warning',
-				hideButton: true,
-			} : {
+			if (!this.isNpmAvailable) {
+				return {
+					calloutText: this.$locale.baseText(
+						'settings.communityNodes.npmUnavailable.warning',
+						{ interpolate: { npmUrl: COMMUNITY_NODES_NPM_INSTALLATION_URL } },
+					),
+					calloutTheme: 'warning',
+					hideButton: true,
+				};
+			}
+
+			if (this.isQueueModeEnabled) {
+				return {
+					calloutText: this.$locale.baseText(
+						'settings.communityNodes.queueMode.warning',
+						{ interpolate: { docURL: COMMUNITY_NODES_INSTALLATION_DOCS_URL } },
+					),
+					calloutTheme: 'warning',
+					hideButton: true,
+				};
+			}
+
+			return {
 				calloutText: '',
 				calloutTheme: '',
 				hideButton: false,