[Feature] emit metafile for ui extensions to allow for bundle analyzation

.changeset/nine-rabbits-win.md

@@ -0,0 +1,5 @@
+---
+'@shopify/app': minor
+---
+
+Emit esbuild metafiles for ui extensions

packages/app/src/cli/services/bundle.test.ts

@@ -1,4 +1,4 @@
-import {writeManifestToBundle, compressBundle} from './bundle.js'
+import {writeManifestToBundle, compressBundle, BUNDLE_EXCLUSION_PATTERNS} from './bundle.js'
 import {AppInterface} from '../models/app/app.js'
 import {describe, test, expect, vi} from 'vitest'
 import {joinPath} from '@shopify/cli-kit/node/path'
@@ -53,7 +53,7 @@ describe('compressBundle', () => {
       expect(zip).toHaveBeenCalledWith({
         inputDirectory: inputDir,
         outputZipPath: outputZip,
-        matchFilePattern: ['**/*', '!**/*.js.map'],
+        matchFilePattern: ['**/*', ...BUNDLE_EXCLUSION_PATTERNS],
       })
       expect(brotliCompress).not.toHaveBeenCalled()
     })
@@ -74,7 +74,7 @@ describe('compressBundle', () => {
       // Then
       expect(zip).toHaveBeenCalledWith(
         expect.objectContaining({
-          matchFilePattern: ['**/*', '!**/*.js.map'],
+          matchFilePattern: ['**/*', ...BUNDLE_EXCLUSION_PATTERNS],
         }),
       )
     })
@@ -95,7 +95,7 @@ describe('compressBundle', () => {
       expect(brotliCompress).toHaveBeenCalledWith({
         inputDirectory: inputDir,
         outputPath: outputBr,
-        matchFilePattern: ['**/*', '!**/*.js.map'],
+        matchFilePattern: ['**/*', ...BUNDLE_EXCLUSION_PATTERNS],
       })
       expect(zip).not.toHaveBeenCalled()
     })
@@ -116,7 +116,48 @@ describe('compressBundle', () => {
       // Then
       expect(brotliCompress).toHaveBeenCalledWith(
         expect.objectContaining({
-          matchFilePattern: ['**/*', '!**/*.js.map'],
+          matchFilePattern: ['**/*', ...BUNDLE_EXCLUSION_PATTERNS],
+        }),
+      )
+    })
+  })
+
+  test('excludes .metafile.json files from the zip', async () => {
+    await inTemporaryDirectory(async (tmpDir) => {
+      // Given
+      const inputDir = joinPath(tmpDir, 'input')
+      const outputZip = joinPath(tmpDir, 'output.zip')
+      await mkdir(inputDir)
+      await writeFile(joinPath(inputDir, 'test.txt'), 'test content')
+      await writeFile(joinPath(inputDir, 'main.metafile.json'), '{"inputs":{},"outputs":{}}')
+
+      // When
+      await compressBundle(inputDir, outputZip)
+
+      // Then
+      expect(zip).toHaveBeenCalledWith(
+        expect.objectContaining({
+          matchFilePattern: ['**/*', ...BUNDLE_EXCLUSION_PATTERNS],
+        }),
+      )
+    })
+  })
+
+  test('uses custom file patterns as-is when provided', async () => {
+    await inTemporaryDirectory(async (tmpDir) => {
+      // Given
+      const inputDir = joinPath(tmpDir, 'input')
+      const outputZip = joinPath(tmpDir, 'output.zip')
+      await mkdir(inputDir)
+      await writeFile(joinPath(inputDir, 'test.txt'), 'test content')
+
+      // When
+      await compressBundle(inputDir, outputZip, ['ext1/**', 'manifest.json'])
+
+      // Then
+      expect(zip).toHaveBeenCalledWith(
+        expect.objectContaining({
+          matchFilePattern: ['ext1/**', 'manifest.json'],
         }),
       )
     })

packages/app/src/cli/services/bundle.ts

@@ -14,8 +14,10 @@ export async function writeManifestToBundle(appManifest: AppManifest, bundlePath
   await writeFile(manifestPath, JSON.stringify(appManifest, null, 2))
 }
 
+export const BUNDLE_EXCLUSION_PATTERNS = ['!**/*.js.map', '!**/*.metafile.json']
+
 export async function compressBundle(inputDirectory: string, outputPath: string, customMatchFilePattern?: string[]) {
-  const matchFilePattern = customMatchFilePattern ?? ['**/*', '!**/*.js.map']
+  const matchFilePattern = customMatchFilePattern ?? ['**/*', ...BUNDLE_EXCLUSION_PATTERNS]
   if (outputPath.endsWith('.br')) {
     await brotliCompress({inputDirectory, outputPath, matchFilePattern})
   } else {

packages/app/src/cli/services/dev/processes/dev-session/dev-session.ts

@@ -2,7 +2,13 @@ import {DevSessionLogger} from './dev-session-logger.js'
 import {DevSessionStatusManager} from './dev-session-status-manager.js'
 import {DevSessionProcessOptions} from './dev-session-process.js'
 import {AppEvent, AppEventWatcher, ExtensionEvent} from '../../app-events/app-event-watcher.js'
-import {compressBundle, getUploadURL, uploadToGCS, writeManifestToBundle} from '../../../bundle.js'
+import {
+  BUNDLE_EXCLUSION_PATTERNS,
+  compressBundle,
+  getUploadURL,
+  uploadToGCS,
+  writeManifestToBundle,
+} from '../../../bundle.js'
 import {DevSessionCreateOptions, DevSessionUpdateOptions} from '../../../../utilities/developer-platform-client.js'
 import {AppManifest} from '../../../../models/app/app.js'
 import {getWebSocketUrl} from '../../extension.js'
@@ -376,7 +382,7 @@ export class DevSession {
     )
 
     // Create zip file with everything
-    const filePattern = [...assets.map((ext) => `${ext}/**`), '!**/*.js.map']
+    const filePattern = [...assets.map((ext) => `${ext}/**`), ...BUNDLE_EXCLUSION_PATTERNS]
     if (includeManifest) filePattern.push('manifest.json')
 
     await compressBundle(this.bundlePath, compressedBundlePath, filePattern)

packages/app/src/cli/services/extensions/bundle.test.ts

@@ -4,9 +4,17 @@ import {loadLocalExtensionsSpecifications} from '../../models/extensions/load-sp
 import {ExtensionInstance} from '../../models/extensions/extension-instance.js'
 import {describe, expect, test, vi} from 'vitest'
 import {context as esContext} from 'esbuild'
-import {glob, inTemporaryDirectory, mkdir, touchFileSync} from '@shopify/cli-kit/node/fs'
+import {glob, inTemporaryDirectory, mkdir, touchFileSync, writeFile} from '@shopify/cli-kit/node/fs'
 import {basename, joinPath} from '@shopify/cli-kit/node/path'
 
+vi.mock('@shopify/cli-kit/node/fs', async () => {
+  const actual: any = await vi.importActual('@shopify/cli-kit/node/fs')
+  return {
+    ...actual,
+    writeFile: vi.fn(),
+  }
+})
+
 vi.mock('esbuild', async () => {
   const esbuild: any = await vi.importActual('esbuild')
   return {
@@ -118,6 +126,82 @@ describe('bundleExtension()', () => {
     expect(plugins).toContain('shopify:deduplicate-react')
   })
 
+  test('writes metafile to disk for production builds', async () => {
+    const extension = await testUIExtension()
+    const stdout: any = {
+      write: vi.fn(),
+    }
+    const stderr: any = {
+      write: vi.fn(),
+    }
+    const esbuildRebuild = vi.fn(esbuildResultFixture)
+
+    vi.mocked(esContext).mockResolvedValue({
+      rebuild: esbuildRebuild,
+      watch: vi.fn(),
+      dispose: vi.fn(),
+      cancel: vi.fn(),
+      serve: vi.fn(),
+    })
+
+    await bundleExtension({
+      env: {},
+      outputPath: extension.outputPath,
+      minify: true,
+      environment: 'production',
+      stdin: {
+        contents: 'console.log("mock stdin content")',
+        resolveDir: 'mock/resolve/dir',
+        loader: 'tsx',
+      },
+      stdout,
+      stderr,
+    })
+
+    expect(writeFile).toHaveBeenCalledWith(
+      expect.stringMatching(/\.metafile\.json$/),
+      JSON.stringify({inputs: {}, outputs: {}}),
+    )
+  })
+
+  test('does not write metafile to disk for development builds', async () => {
+    const extension = await testUIExtension()
+    const stdout: any = {
+      write: vi.fn(),
+    }
+    const stderr: any = {
+      write: vi.fn(),
+    }
+    const esbuildRebuild = vi.fn(async () => {
+      const result = await esbuildResultFixture()
+      return {...result, metafile: undefined}
+    })
+
+    vi.mocked(esContext).mockResolvedValue({
+      rebuild: esbuildRebuild,
+      watch: vi.fn(),
+      dispose: vi.fn(),
+      cancel: vi.fn(),
+      serve: vi.fn(),
+    })
+
+    await bundleExtension({
+      env: {},
+      outputPath: extension.outputPath,
+      minify: false,
+      environment: 'development',
+      stdin: {
+        contents: 'console.log("mock stdin content")',
+        resolveDir: 'mock/resolve/dir',
+        loader: 'tsx',
+      },
+      stdout,
+      stderr,
+    })
+
+    expect(writeFile).not.toHaveBeenCalled()
+  })
+
   test('can switch off React deduplication', async () => {
     // Given
     const extension = await testUIExtension()

packages/app/src/cli/services/extensions/bundle.ts

@@ -4,9 +4,9 @@ import {themeExtensionFiles} from '../../utilities/extensions/theme.js'
 import {EsbuildEnvVarRegex, environmentVariableNames} from '../../constants.js'
 import {context as esContext, formatMessagesSync} from 'esbuild'
 import {AbortSignal} from '@shopify/cli-kit/node/abort'
-import {copyFile, glob} from '@shopify/cli-kit/node/fs'
-import {joinPath, relativePath} from '@shopify/cli-kit/node/path'
-import {outputDebug} from '@shopify/cli-kit/node/output'
+import {copyFile, glob, writeFile} from '@shopify/cli-kit/node/fs'
+import {joinPath, parsePath, relativePath} from '@shopify/cli-kit/node/path'
+import {outputDebug, outputWarn} from '@shopify/cli-kit/node/output'
 import {isTruthy} from '@shopify/cli-kit/node/context/utilities'
 import {pickBy} from '@shopify/cli-kit/common/object'
 import graphqlLoaderPlugin from '@luckycatfactory/esbuild-graphql-loader'
@@ -58,6 +58,16 @@ export async function bundleExtension(options: BundleOptions, processEnv = proce
   const context = await esContext(esbuildOptions)
   const result = await context.rebuild()
   onResult(result, options)
+  if (result.metafile) {
+    const {dir, name} = parsePath(options.outputPath)
+    const metafilePath = joinPath(dir, `${name}.metafile.json`)
+    try {
+      await writeFile(metafilePath, JSON.stringify(result.metafile))
+      // eslint-disable-next-line no-catch-all/no-catch-all
+    } catch (error) {
+      outputWarn(`Failed to write metafile to ${metafilePath}: ${error}`)
+    }
+  }
   await context.dispose()
 }
 
@@ -154,6 +164,9 @@ export function getESBuildOptions(options: BundleOptions, processEnv = process.e
     esbuildOptions.sourcemap = true
     esbuildOptions.sourceRoot = `${options.stdin.resolveDir}/src`
   }
+  if (options.environment === 'production') {
+    esbuildOptions.metafile = true
+  }
   return esbuildOptions
 }
 

packages/cli-kit/src/public/node/path.ts

@@ -7,6 +7,7 @@ import {
   resolve,
   basename as basenamePathe,
   extname as extnamePathe,
+  parse,
   isAbsolute,
 } from 'pathe'
 import {fileURLToPath} from 'url'
@@ -95,6 +96,16 @@ export function extname(path: string): string {
   return extnamePathe(path)
 }
 
+/**
+ * Parses a path into its components (root, dir, base, ext, name).
+ *
+ * @param path - Path to parse.
+ * @returns Parsed path object.
+ */
+export function parsePath(path: string): {root: string; dir: string; base: string; ext: string; name: string} {
+  return parse(path)
+}
+
 /**
  * Given an absolute filesystem path, it makes it relative to
  * the current working directory. This is useful when logging paths