move static content step to adapter pattern

Author: mrstork

src/adapter/adapter.ts

@@ -45,6 +45,10 @@ const adapter: NextAdapter = {
       nextAdapterContext,
       frameworksAPIConfig,
     )
+    frameworksAPIConfig = await onBuildCompleteForStaticContent(
+      nextAdapterContext,
+      frameworksAPIConfig,
+    )
     frameworksAPIConfig = onBuildCompleteForHeaders(nextAdapterContext, frameworksAPIConfig)
 
     if (frameworksAPIConfig) {

src/adapter/static-content.ts

@@ -0,0 +1,44 @@
+import { mkdir, readFile, writeFile } from 'node:fs/promises'
+import { join } from 'node:path/posix'
+
+import type { HtmlBlob } from '../shared/blob-types.cjs'
+import { encodeBlobKey } from '../shared/blobkey.js'
+
+import type { FrameworksAPIConfig, OnBuildCompleteContext } from './types.js'
+
+export async function onBuildComplete(
+  ctx: OnBuildCompleteContext,
+  frameworksAPIConfigArg: FrameworksAPIConfig,
+) {
+  const frameworksAPIConfig: FrameworksAPIConfig = frameworksAPIConfigArg ?? {}
+
+  const BLOBS_DIRECTORY = join(ctx.projectDir, '.netlify/deploy/v1/blobs/deploy')
+
+  try {
+    await mkdir(BLOBS_DIRECTORY, { recursive: true })
+
+    for (const appPage of ctx.outputs.appPages) {
+      const html = await readFile(appPage.filePath, 'utf-8')
+
+      await writeFile(
+        join(BLOBS_DIRECTORY, await encodeBlobKey(appPage.pathname)),
+        JSON.stringify({ html, isFullyStaticPage: false } satisfies HtmlBlob),
+        'utf-8',
+      )
+    }
+
+    for (const appRoute of ctx.outputs.appRoutes) {
+      const html = await readFile(appRoute.filePath, 'utf-8')
+
+      await writeFile(
+        join(BLOBS_DIRECTORY, await encodeBlobKey(appRoute.pathname)),
+        JSON.stringify({ html, isFullyStaticPage: false } satisfies HtmlBlob),
+        'utf-8',
+      )
+    }
+  } catch (error) {
+    throw new Error(`Failed assembling static pages for upload`, { cause: error })
+  }
+
+  return frameworksAPIConfig
+}