feat: add firebase preset (#100)

packages/nitro/src/presets/firebase.ts

@@ -0,0 +1,82 @@
+import { join, relative, resolve } from 'upath'
+import { existsSync, readJSONSync } from 'fs-extra'
+import consola from 'consola'
+import globby from 'globby'
+
+import { writeFile } from '../utils'
+import { NitroPreset, NitroContext } from '../context'
+
+export const firebase: NitroPreset = {
+  inlineChunks: false,
+  entry: '{{ _internal.runtimeDir }}/entries/firebase',
+  hooks: {
+    async 'nitro:compiled' (ctx: NitroContext) {
+      await writeRoutes(ctx)
+    }
+  }
+}
+
+async function writeRoutes ({ output: { publicDir, serverDir }, _nuxt: { rootDir } }: NitroContext) {
+  if (!existsSync(join(rootDir, 'firebase.json'))) {
+    const firebase = {
+      functions: {
+        source: relative(rootDir, serverDir)
+      },
+      hosting: [
+        {
+          site: '<your_project_id>',
+          public: relative(rootDir, publicDir),
+          cleanUrls: true,
+          rewrites: [
+            {
+              source: '**',
+              function: 'server'
+            }
+          ]
+        }
+      ]
+    }
+    await writeFile(resolve(rootDir, 'firebase.json'), JSON.stringify(firebase))
+  }
+
+  const jsons = await globby(`${serverDir}/node_modules/**/package.json`)
+  const prefixLength = `${serverDir}/node_modules/`.length
+  const suffixLength = '/package.json'.length
+  const dependencies = jsons.reduce((obj, packageJson) => {
+    const dirname = packageJson.slice(prefixLength, -suffixLength)
+    if (!dirname.includes('node_modules')) {
+      obj[dirname] = require(packageJson).version
+    }
+    return obj
+  }, {} as Record<string, string>)
+
+  let nodeVersion = '12'
+  try {
+    const currentNodeVersion = readJSONSync(join(rootDir, 'package.json')).engines.node
+    if (['12', '10'].includes(currentNodeVersion)) {
+      nodeVersion = currentNodeVersion
+    }
+  } catch {}
+
+  await writeFile(
+    resolve(serverDir, 'package.json'),
+    JSON.stringify(
+      {
+        private: true,
+        main: './index.js',
+        dependencies,
+        devDependencies: {
+          'firebase-functions-test': 'latest',
+          'firebase-admin': require('firebase-admin/package.json').version,
+          'firebase-functions': require('firebase-functions/package.json')
+            .version
+        },
+        engines: { node: nodeVersion }
+      },
+      null,
+      2
+    )
+  )
+
+  consola.success('Ready to run `firebase deploy`')
+}

packages/nitro/src/presets/index.ts

@@ -2,6 +2,7 @@ export * from './azure_functions'
 export * from './azure'
 export * from './browser'
 export * from './cloudflare'
+export * from './firebase'
 export * from './lambda'
 export * from './netlify'
 export * from './node'

packages/nitro/src/runtime/entries/firebase.ts

@@ -0,0 +1,7 @@
+import '~polyfill'
+
+import { handle } from '../server'
+
+const functions = require('firebase-functions')
+
+export const server = functions.https.onRequest(handle)