feat: Set experimentalRegion to 'context' in order to enable colocated blobs (#488)

Author: mrstork

src/build/plugin-context.test.ts

@@ -195,3 +195,18 @@ test('nx monorepo with package path and different distDir', () => {
   expect(ctx.relPublishDir).toBe('dist/apps/my-app/.next')
   expect(ctx.publishDir).toBe(join(cwd, 'dist/apps/my-app/.next'))
 })
+
+test('should use deploy configuration blobs directory when @netlify/build version supports regional blob awareness', () => {
+  const { cwd } = mockFileSystem({
+    '.next/required-server-files.json': JSON.stringify({
+      config: { distDir: '.next' },
+      relativeAppDir: '',
+    } as RequiredServerFilesManifest),
+  })
+
+  const ctx = new PluginContext({
+    constants: { NETLIFY_BUILD_VERSION: '29.41.5' },
+  } as NetlifyPluginOptions)
+
+  expect(ctx.blobDir).toBe(join(cwd, '.netlify/deploy/v1/blobs/deploy'))
+})

src/build/plugin-context.ts

@@ -13,6 +13,7 @@ import type {
 import type { PrerenderManifest, RoutesManifest } from 'next/dist/build/index.js'
 import type { MiddlewareManifest } from 'next/dist/build/webpack/plugins/middleware-plugin.js'
 import type { NextConfigComplete } from 'next/dist/server/config-shared.js'
+import { satisfies } from 'semver'
 
 const MODULE_DIR = fileURLToPath(new URL('.', import.meta.url))
 const PLUGIN_DIR = join(MODULE_DIR, '../..')
@@ -151,8 +152,9 @@ export class PluginContext {
   }
 
   get useRegionalBlobs(): boolean {
-    // Disabling regional blobs until feature is ready for production (see FRA-436)
-    return false
+    // Region-aware blobs are only available as of CLI v17.23.5 (i.e. Build v29.41.5)
+    const REQUIRED_BUILD_VERSION = '>=29.41.5'
+    return satisfies(this.buildVersion, REQUIRED_BUILD_VERSION, { includePrerelease: true })
   }
 
   /**

tests/utils/helpers.ts

@@ -74,6 +74,7 @@ export const startMockBlobStore = async (ctx: FixtureTestContext) => {
   ctx.blobStore = getDeployStore({
     apiURL: `http://${ctx.blobStoreHost}`,
     deployID: ctx.deployID,
+    experimentalRegion: 'context',
     siteID: ctx.siteID,
     token: BLOB_TOKEN,
   })
@@ -88,6 +89,7 @@ export const getBlobEntries = async (ctx: FixtureTestContext) => {
     : getDeployStore({
         apiURL: `http://${ctx.blobStoreHost}`,
         deployID: ctx.deployID,
+        experimentalRegion: 'context',
         siteID: ctx.siteID,
         token: BLOB_TOKEN,
       })