feat: install framework runtime (#4812)

* chore: install runtime

* chore: change featureflag indexing

* chore: address PR concerns

* Update packages/build/src/core/build.ts

Co-authored-by: Eduardo Bouças <mail@eduardoboucas.com>

* chore: use .some to avoid looping twice

Co-authored-by: Eduardo Bouças <mail@eduardoboucas.com>

Author: jobala

packages/build/src/core/build.ts

@@ -1,3 +1,5 @@
+import { supportedRuntimes } from '@netlify/framework-info'
+
 import { getErrorInfo } from '../error/info.js'
 import { startErrorMonitor } from '../error/monitor/start.js'
 import { getBufferLogs, getSystemLogger } from '../log/logger.js'
@@ -77,6 +79,7 @@ const tExecBuild = async function ({
   timeline,
   devCommand,
   quiet,
+  framework,
 }) {
   const configOpts = getConfigOpts({
     config,
@@ -124,6 +127,20 @@ const tExecBuild = async function ({
     timers,
     quiet,
   })
+
+  if (featureFlags.build_automatic_runtime && framework) {
+    const runtime = supportedRuntimes[framework]
+
+    if (runtime !== undefined) {
+      const skip = childEnv[runtime.skipFlag] === 'true'
+      const installed = netlifyConfig.plugins.some((plugin) => plugin.package === runtime.package)
+
+      if (!installed && !skip) {
+        netlifyConfig.plugins.push({ package: runtime.package })
+      }
+    }
+  }
+
   const constants = await getConstants({
     configPath,
     buildDir,

packages/build/src/core/main.ts

@@ -65,6 +65,7 @@ export default async function buildSite(flags: Partial<BuildCLIFlags> = {}): Pro
       debug,
       testOpts,
       errorParams,
+      framework,
     })
     await handleBuildSuccess({
       framework,

packages/framework-info/src/main.js

@@ -126,3 +126,8 @@ export const getFramework = async function (frameworkId, options) {
   const context = await getContext(options)
   return get(frameworkId, context)
 }
+
+export const supportedRuntimes = {
+  next: { package: '@netlify/plugin-nextjs', skipFlag: 'NETLIFY_NEXT_PLUGIN_SKIP' },
+  gatsby: { package: '@netlify/plugin-gatsby', skipFlag: 'NETLIFY_GATSBY_PLUGIN_SKIP' },
+}