feat(kit): support templates with getContents() for nuxt 2 (#587)

packages/kit/package.json

@@ -13,6 +13,7 @@
     "prepack": "unbuild"
   },
   "devDependencies": {
+    "@types/lodash": "^4.14.173",
     "unbuild": "latest"
   },
   "dependencies": {
@@ -24,6 +25,7 @@
     "hash-sum": "^2.0.0",
     "hookable": "^5.0.0",
     "jiti": "^1.12.3",
+    "lodash": "^4.17.21",
     "pathe": "^0.2.0",
     "rc9": "^1.2.0",
     "scule": "^0.2.1",

packages/kit/src/module/define.ts

@@ -1,8 +1,10 @@
+import { promises as fsp } from 'fs'
 import defu from 'defu'
 import { applyDefaults } from 'untyped'
 import { useNuxt, nuxtCtx } from '../nuxt'
-import type { Nuxt } from '../types/nuxt'
+import type { Nuxt, NuxtTemplate } from '../types/nuxt'
 import type { NuxtModule, LegacyNuxtModule, ModuleOptions } from '../types/module'
+import { compileTemplate, isNuxt2, templateUtils } from './utils'
 
 /**
  * Define a Nuxt module, automatically merging defaults with user provided options, installing
@@ -48,6 +50,39 @@ export function defineNuxtModule<OptionsT extends ModuleOptions> (input: NuxtMod
       }
     }
 
+    if (isNuxt2()) {
+      // Support virtual templates with getContents() by writing them to .nuxt directory
+      let virtualTemplates: NuxtTemplate[]
+      nuxt.hook('builder:prepared', (_builder, buildOptions) => {
+        virtualTemplates = []
+        buildOptions.templates.forEach((template, index, arr) => {
+          if (!template.getContents) { return }
+          // Remove template from template array to handle it ourselves
+          arr.splice(index, 1)
+          virtualTemplates.push(template)
+        })
+      })
+      nuxt.hook('build:templates', async (templates) => {
+        const context = {
+          nuxt,
+          utils: templateUtils,
+          app: {
+            dir: nuxt.options.srcDir,
+            extensions: nuxt.options.extensions,
+            plugins: nuxt.options.plugins,
+            templates: [
+              ...templates.templatesFiles,
+              ...virtualTemplates
+            ]
+          }
+        }
+        for await (const template of virtualTemplates) {
+          const contents = await compileTemplate({ ...template, src: '' }, context)
+          await fsp.writeFile(template.dst, contents)
+        }
+      })
+    }
+
     // Call setup
     return mod.setup.call(null, resolvedOptions, nuxt)
   }

packages/kit/src/module/utils.ts

@@ -1,8 +1,10 @@
-import fs from 'fs'
-import { basename, parse, resolve } from 'pathe'
+import { existsSync, promises as fsp } from 'fs'
+import { basename, extname, parse, resolve } from 'pathe'
+import lodashTemplate from 'lodash/template'
 import hash from 'hash-sum'
 import type { WebpackPluginInstance, Configuration as WebpackConfig } from 'webpack'
 import type { Plugin as VitePlugin, UserConfig as ViteConfig } from 'vite'
+import { camelCase } from 'scule'
 import { useNuxt } from '../nuxt'
 import type { NuxtTemplate, NuxtPlugin, NuxtPluginTemplate } from '../types/nuxt'
 
@@ -42,7 +44,7 @@ export function normalizeTemplate (template: NuxtTemplate | string): NuxtTemplat
 
   // Use src if provided
   if (template.src) {
-    if (!fs.existsSync(template.src)) {
+    if (!existsSync(template.src)) {
       throw new Error('Template not found: ' + template.src)
     }
     if (!template.filename) {
@@ -259,3 +261,42 @@ export function addVitePlugin (plugin: VitePlugin, options?: ExtendViteConfigOpt
 export function isNuxt2 (nuxt?: any) {
   return (nuxt || useNuxt()).version?.startsWith('v2')
 }
+
+export async function compileTemplate (template: NuxtTemplate, ctx: any) {
+  const data = { ...ctx, ...template.options }
+  if (template.src) {
+    try {
+      const srcContents = await fsp.readFile(template.src, 'utf-8')
+      return lodashTemplate(srcContents, {})(data)
+    } catch (err) {
+      console.error('Error compiling template: ', template)
+      throw err
+    }
+  }
+  if (template.getContents) {
+    return template.getContents(data)
+  }
+  throw new Error('Invalid template: ' + JSON.stringify(template))
+}
+
+const serialize = data => JSON.stringify(data, null, 2).replace(/"{(.+)}"/g, '$1')
+
+const importName = (src: string) => `${camelCase(basename(src, extname(src))).replace(/[^a-zA-Z?\d\s:]/g, '')}_${hash(src)}`
+
+const importSources = (sources: string | string[], { lazy = false } = {}) => {
+  if (!Array.isArray(sources)) {
+    sources = [sources]
+  }
+  return sources.map((src) => {
+    if (lazy) {
+      return `const ${importName(src)} = () => import('${src}' /* webpackChunkName: '${src}' */)`
+    }
+    return `import ${importName(src)} from '${src}'`
+  }).join('\n')
+}
+
+export const templateUtils = {
+  serialize,
+  importName,
+  importSources
+}

packages/kit/src/types/hooks.ts

@@ -3,6 +3,7 @@ import type { HookCallback } from 'hookable'
 import type { Compiler, Configuration, Stats } from 'webpack'
 import type { NuxtConfig, NuxtOptions } from '..'
 import type { ModuleContainer } from '../module/container'
+import { NuxtTemplate } from '../types/nuxt'
 import { Nuxt, NuxtApp } from './nuxt'
 
 type HookResult = Promise<void> | void
@@ -11,13 +12,6 @@ type Builder = any
 type Generator = any
 type Server = any
 
-type TemplateFile = string | {
-  src?: string
-  dst?: string
-  custom?: boolean
-  options?: any
-}
-
 type WatchEvent = 'add' | 'addDir' | 'change' | 'unlink' | 'unlinkDir'
 interface PreloadFile {
   asType: 'script' | 'style' | 'font'
@@ -49,7 +43,7 @@ export interface NuxtHooks extends Record<string, HookCallback> {
   'builder:extendPlugins': (plugins: NuxtOptions['plugins']) => HookResult
   'build:templates': (templates: {
     templateVars: Record<string, any>,
-    templatesFiles: TemplateFile[],
+    templatesFiles: NuxtTemplate[],
     resolve: (...args: string[]) => string
   }) => HookResult
   'build:extendRoutes': (routes: any[], resolve: (...args: string[]) => string) => HookResult

packages/kit/src/types/nuxt.ts

@@ -23,6 +23,8 @@ export interface Nuxt {
 export interface NuxtTemplate {
   /** @deprecated filename */
   fileName?: string
+  /** @deprecated whether template is custom or a nuxt core template */
+  custom?: boolean
   /** resolved output file path (generated) */
   dst?: string
   /** The target filename once the template is copied into the Nuxt buildDir */

packages/nuxt3/package.json

@@ -33,7 +33,6 @@
     "hash-sum": "^2.0.0",
     "hookable": "^5.0.0",
     "ignore": "^5.1.8",
-    "lodash": "^4.17.21",
     "nuxi": "^0.10.0",
     "ohmyfetch": "^0.3.1",
     "pathe": "^0.2.0",
@@ -47,7 +46,6 @@
   "devDependencies": {
     "@types/fs-extra": "^9.0.13",
     "@types/hash-sum": "^1.0.0",
-    "@types/lodash": "^4.14.173",
     "unbuild": "latest",
     "vue-meta": "next"
   },

packages/nuxt3/src/core/app.ts

@@ -1,11 +1,9 @@
 import { resolve } from 'pathe'
-import lodashTemplate from 'lodash/template'
 import defu from 'defu'
-import { tryResolvePath, resolveFiles, Nuxt, NuxtApp, NuxtTemplate, normalizePlugin, normalizeTemplate } from '@nuxt/kit'
-import { readFile, writeFile } from 'fs-extra'
+import { tryResolvePath, resolveFiles, Nuxt, NuxtApp, normalizePlugin, normalizeTemplate, compileTemplate, templateUtils } from '@nuxt/kit'
+import { writeFile } from 'fs-extra'
 
 import * as defaultTemplates from '../app/templates'
-import * as templateUtils from './template.utils'
 
 export function createApp (nuxt: Nuxt, options: Partial<NuxtApp> = {}): NuxtApp {
   return defu(options, {
@@ -77,20 +75,3 @@ export async function resolveApp (nuxt: Nuxt, app: NuxtApp) {
   // Extend app
   await nuxt.callHook('app:resolve', app)
 }
-
-async function compileTemplate (template: NuxtTemplate, ctx: any) {
-  const data = { ...ctx, ...template.options }
-  if (template.src) {
-    try {
-      const srcContents = await readFile(template.src, 'utf-8')
-      return lodashTemplate(srcContents, {})(data)
-    } catch (err) {
-      console.error('Error compiling template: ', template)
-      throw err
-    }
-  }
-  if (template.getContents) {
-    return template.getContents(data)
-  }
-  throw new Error('Invalid template: ' + JSON.stringify(template))
-}

yarn.lock

@@ -1485,6 +1485,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@nuxt/kit@workspace:packages/kit"
   dependencies:
+    "@types/lodash": ^4.14.173
     consola: ^2.15.3
     create-require: ^1.1.1
     defu: ^5.0.0
@@ -1493,6 +1494,7 @@ __metadata:
     hash-sum: ^2.0.0
     hookable: ^5.0.0
     jiti: ^1.12.3
+    lodash: ^4.17.21
     pathe: ^0.2.0
     rc9: ^1.2.0
     scule: ^0.2.1
@@ -10087,7 +10089,6 @@ fsevents@~2.3.2:
     "@nuxt/webpack-builder": ^0.10.0
     "@types/fs-extra": ^9.0.13
     "@types/hash-sum": ^1.0.0
-    "@types/lodash": ^4.14.173
     "@vue/reactivity": 3.2.16
     "@vue/server-renderer": ^3.2.16
     "@vue/shared": 3.2.16
@@ -10100,7 +10101,6 @@ fsevents@~2.3.2:
     hash-sum: ^2.0.0
     hookable: ^5.0.0
     ignore: ^5.1.8
-    lodash: ^4.17.21
     nuxi: ^0.10.0
     ohmyfetch: ^0.3.1
     pathe: ^0.2.0