From ebb6a303700df09b83ebe49f23b7641c9573377c Mon Sep 17 00:00:00 2001
From: Tim Neutkens <timneutkens@me.com>
Date: Wed, 11 Aug 2021 17:47:16 +0200
Subject: [PATCH] Revert "Add warning during `next build` when sharp is missing
 (#27933)"

This reverts commit 51a2a028ddcc321aac4744b777df2b4e96511b83.
---
 packages/next/build/index.ts                  | 16 ------
 .../image-optimizer/test/index.test.js        | 51 +++++--------------
 2 files changed, 12 insertions(+), 55 deletions(-)

diff --git a/packages/next/build/index.ts b/packages/next/build/index.ts
index cdb0f9d14df61..6621ed8ef2cf5 100644
--- a/packages/next/build/index.ts
+++ b/packages/next/build/index.ts
@@ -930,22 +930,6 @@ export default async function build(
       return returnValue
     })
 
-    if (isNextImageImported) {
-      try {
-        if (process.env.NEXT_SHARP_PATH) {
-          require(process.env.NEXT_SHARP_PATH)
-        } else {
-          require.resolve('sharp', {
-            paths: [path.join(dir, 'node_modules')],
-          })
-        }
-      } catch (e) {
-        Log.warn(
-          'Detected `next/image` usage without `sharp`. https://nextjs.org/docs/messages/sharp-missing-in-production'
-        )
-      }
-    }
-
     if (customAppGetInitialProps) {
       console.warn(
         chalk.bold.yellow(`Warning: `) +
diff --git a/test/integration/image-optimizer/test/index.test.js b/test/integration/image-optimizer/test/index.test.js
index 739501224c7b1..9faab437aa3d7 100644
--- a/test/integration/image-optimizer/test/index.test.js
+++ b/test/integration/image-optimizer/test/index.test.js
@@ -23,11 +23,10 @@ const imagesDir = join(appDir, '.next', 'cache', 'images')
 const nextConfig = new File(join(appDir, 'next.config.js'))
 const largeSize = 1080 // defaults defined in server/config.ts
 let nextOutput
-let buildOutput
 let appPort
 let app
-const sharpRuntimeWarning = `For production Image Optimization with Next.js, the optional 'sharp' package is strongly recommended`
-const sharpBuildWarning = 'Detected `next/image` usage without `sharp`.'
+
+const sharpMissingText = `For production Image Optimization with Next.js, the optional 'sharp' package is strongly recommended`
 
 async function fsToJson(dir, output = {}) {
   const files = await fs.readdir(dir)
@@ -727,29 +726,13 @@ function runTests({ w, isDev, domains = [], ttl, isSharp }) {
     expect(Object.keys(json1).length).toBe(1)
   })
 
-  if (isDev) {
-    it('should not have runtime warning in dev', () => {
-      expect(nextOutput).not.toContain(sharpRuntimeWarning)
-    })
-
-    it('should not have build warning in dev', () => {
-      expect(buildOutput).not.toContain(sharpBuildWarning)
-    })
-  } else if (isSharp) {
-    it('should not have runtime warning when sharp is installed', () => {
-      expect(nextOutput).not.toContain(sharpRuntimeWarning)
-    })
-
-    it('should not have build warning when sharp is installed', () => {
-      expect(buildOutput).not.toContain(sharpBuildWarning)
+  if (isDev || isSharp) {
+    it('should not have sharp missing warning', () => {
+      expect(nextOutput).not.toContain(sharpMissingText)
     })
   } else {
-    it('should have runtime warning when sharp is not installed', () => {
-      expect(nextOutput).toContain(sharpRuntimeWarning)
-    })
-
-    it('should have build warning when sharp is not installed', () => {
-      expect(buildOutput).toContain(sharpBuildWarning)
+    it('should have sharp missing warning', () => {
+      expect(nextOutput).toContain(sharpMissingText)
     })
   }
 }
@@ -927,10 +910,8 @@ describe('Image Optimizer', () => {
         },
       })
       nextOutput = ''
-      buildOutput = ''
       nextConfig.replace('{ /* replaceme */ }', json)
-      const out = await nextBuild(appDir, [], { stderr: true })
-      buildOutput = out.stderr
+      await nextBuild(appDir)
       appPort = await findPort()
       app = await nextStart(appDir, appPort, {
         onStderr(msg) {
@@ -968,8 +949,7 @@ describe('Image Optimizer', () => {
         },
       }`
       )
-      const out = await nextBuild(appDir, [], { stderr: true })
-      buildOutput = out.stderr
+      await nextBuild(appDir)
       appPort = await findPort()
       app = await nextStart(appDir, appPort)
     })
@@ -1045,8 +1025,7 @@ describe('Image Optimizer', () => {
         },
       }`
       nextConfig.replace('{ /* replaceme */ }', newConfig)
-      const out = await nextBuild(appDir, [], { stderr: true })
-      buildOutput = out.stderr
+      await nextBuild(appDir)
       appPort = await findPort()
       app = await nextStart(appDir, appPort)
     })
@@ -1105,7 +1084,6 @@ describe('Image Optimizer', () => {
       const size = 384 // defaults defined in server/config.ts
       beforeAll(async () => {
         nextOutput = ''
-        buildOutput = ''
         appPort = await findPort()
         app = await launchApp(appDir, appPort, {
           onStderr(msg) {
@@ -1133,7 +1111,6 @@ describe('Image Optimizer', () => {
           },
         })
         nextOutput = ''
-        buildOutput = ''
         nextConfig.replace('{ /* replaceme */ }', json)
         appPort = await findPort()
         app = await launchApp(appDir, appPort, {
@@ -1156,9 +1133,7 @@ describe('Image Optimizer', () => {
       const size = 384 // defaults defined in server/config.ts
       beforeAll(async () => {
         nextOutput = ''
-        buildOutput = ''
-        const out = await nextBuild(appDir, [], { stderr: true })
-        buildOutput = out.stderr
+        await nextBuild(appDir)
         appPort = await findPort()
         app = await nextStart(appDir, appPort, {
           onStderr(msg) {
@@ -1192,10 +1167,8 @@ describe('Image Optimizer', () => {
           },
         })
         nextOutput = ''
-        buildOutput = ''
         nextConfig.replace('{ /* replaceme */ }', json)
-        const out = await nextBuild(appDir, [], { stderr: true })
-        buildOutput = out.stderr
+        await nextBuild(appDir)
         appPort = await findPort()
         app = await nextStart(appDir, appPort, {
           onStderr(msg) {