fix: sourcemap source point to null

packages/vite/src/node/plugins/assetImportMetaUrl.ts

@@ -3,6 +3,7 @@ import MagicString from 'magic-string'
 import { stripLiteral } from 'strip-literal'
 import type { Plugin } from '../plugin'
 import type { ResolvedConfig } from '../config'
+import { transformResult } from '../utils'
 import { fileToUrl } from './asset'
 import { preloadHelperId } from './importAnalysisBuild'
 
@@ -80,10 +81,7 @@ export function assetImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
           )
         }
         if (s) {
-          return {
-            code: s.toString(),
-            map: config.build.sourcemap ? s.generateMap({ hires: true }) : null
-          }
+          return transformResult(s, id, config)
         }
       }
       return null

packages/vite/src/node/plugins/dynamicImportVars.ts

@@ -7,7 +7,12 @@ import { createFilter } from '@rollup/pluginutils'
 import { dynamicImportToGlob } from '@rollup/plugin-dynamic-import-vars'
 import type { Plugin } from '../plugin'
 import type { ResolvedConfig } from '../config'
-import { normalizePath, parseRequest, requestQuerySplitRE } from '../utils'
+import {
+  normalizePath,
+  parseRequest,
+  requestQuerySplitRE,
+  transformResult
+} from '../utils'
 
 export const dynamicImportHelperId = '/@vite/dynamic-import-helper'
 
@@ -204,10 +209,7 @@ export function dynamicImportVarsPlugin(config: ResolvedConfig): Plugin {
             `import __variableDynamicImportRuntimeHelper from "${dynamicImportHelperId}";`
           )
         }
-        return {
-          code: s.toString(),
-          map: config.build.sourcemap ? s.generateMap({ hires: true }) : null
-        }
+        return transformResult(s, importer, config)
       }
     }
   }

packages/vite/src/node/plugins/importAnalysis.ts

@@ -37,6 +37,7 @@ import {
   prettifyUrl,
   removeImportQuery,
   timeFrom,
+  transformResult,
   unwrapId
 } from '../utils'
 import type { ResolvedConfig } from '../config'
@@ -626,10 +627,7 @@ export function importAnalysisPlugin(config: ResolvedConfig): Plugin {
       }
 
       if (s) {
-        return {
-          code: s.toString(),
-          map: config.build.sourcemap ? s.generateMap({ hires: true }) : null
-        }
+        return transformResult(s, importer, config)
       } else {
         return source
       }

packages/vite/src/node/plugins/importMetaGlob.ts

@@ -17,7 +17,7 @@ import type { Plugin } from '../plugin'
 import type { ViteDevServer } from '../server'
 import type { ModuleNode } from '../server/moduleGraph'
 import type { ResolvedConfig } from '../config'
-import { normalizePath, slash } from '../utils'
+import { normalizePath, slash, transformResult } from '../utils'
 
 const { isMatch, scan } = micromatch
 
@@ -72,10 +72,7 @@ export function importGlobPlugin(config: ResolvedConfig): Plugin {
             server!.watcher.add(dirname(file))
           })
         }
-        return {
-          code: result.s.toString(),
-          map: config.build.sourcemap ? result.s.generateMap() : null
-        }
+        return transformResult(result.s, id, config)
       }
     }
   }

packages/vite/src/node/plugins/workerImportMetaUrl.ts

@@ -5,7 +5,13 @@ import type { RollupError } from 'rollup'
 import { stripLiteral } from 'strip-literal'
 import type { ResolvedConfig } from '../config'
 import type { Plugin } from '../plugin'
-import { cleanUrl, injectQuery, normalizePath, parseRequest } from '../utils'
+import {
+  cleanUrl,
+  injectQuery,
+  normalizePath,
+  parseRequest,
+  transformResult
+} from '../utils'
 import type { WorkerType } from './worker'
 import { WORKER_FILE_ID, workerFileToUrl } from './worker'
 import { fileToUrl } from './asset'
@@ -130,10 +136,7 @@ export function workerImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
         }
 
         if (s) {
-          return {
-            code: s.toString(),
-            map: config.build.sourcemap ? s.generateMap({ hires: true }) : null
-          }
+          return transformResult(s, id, config)
         }
 
         return null

packages/vite/src/node/utils.ts

@@ -13,6 +13,9 @@ import type { DecodedSourceMap, RawSourceMap } from '@ampproject/remapping'
 import colors from 'picocolors'
 import debug from 'debug'
 import type { Alias, AliasOptions } from 'types/alias'
+import type MagicString from 'magic-string'
+
+import type { TransformResult } from 'rollup'
 import {
   CLIENT_ENTRY,
   CLIENT_PUBLIC_PATH,
@@ -21,6 +24,7 @@ import {
   FS_PREFIX,
   VALID_ID_PREFIX
 } from './constants'
+import type { ResolvedConfig } from '.'
 
 export function slash(p: string): string {
   return p.replace(/\\/g, '/')
@@ -971,3 +975,16 @@ function normalizeSingleAlias({
   }
   return alias
 }
+
+export function transformResult(
+  s: MagicString,
+  id: string,
+  config: ResolvedConfig
+): TransformResult {
+  const isBuild = config.command === 'build'
+  const needSourceMap = !isBuild || config.build.sourcemap
+  return {
+    code: s.toString(),
+    map: needSourceMap ? s.generateMap({ hires: true, source: id }) : null
+  }
+}

playground/dynamic-import/vite.config.js

@@ -26,5 +26,8 @@ module.exports = vite.defineConfig({
     alias: {
       '@': path.resolve(__dirname, 'alias')
     }
+  },
+  build: {
+    sourcemap: true
   }
 })

playground/worker/__tests__/sourcemap/__snapshots__/sourcemap-worker.spec.ts.snap

@@ -0,0 +1,14 @@
+// Vitest Snapshot v1
+
+exports[`serve:worker-sourcemap > nested worker 1`] = `
+{
+  "mappings": "AAAA,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,uCAAsB,CAAC;AAClD;AACA,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;AACzB,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;AAC1B,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;AACnC,CAAC,CAAC,CAAC;AACH,CAAC;AACD;AACA,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;AAChB,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;",
+  "sources": [
+    "/root/possible-ts-output-worker.mjs?worker_file",
+  ],
+  "sourcesContent": [
+    null,
+  ],
+  "version": 3,
+}
+`;

playground/worker/__tests__/sourcemap/sourcemap-worker.spec.ts

@@ -1,6 +1,14 @@
+/* eslint-disable node/no-unsupported-features/node-builtins */
 import fs from 'fs'
 import path from 'path'
-import { isBuild, testDir } from '~utils'
+import {
+  extractSourcemap,
+  formatSourcemapForSnapshot,
+  isBuild,
+  isServe,
+  page,
+  testDir
+} from '~utils'
 
 describe.runIf(isBuild)('build', () => {
   // assert correct files
@@ -113,6 +121,16 @@ describe.runIf(isBuild)('build', () => {
   })
 })
 
+describe.runIf(isServe)('serve:worker-sourcemap', () => {
+  test('nested worker', async () => {
+    const res = await page.request.get(
+      new URL('./possible-ts-output-worker.mjs?worker_file', page.url()).href
+    )
+    const map = extractSourcemap(await res.text())
+    expect(formatSourcemapForSnapshot(map)).toMatchSnapshot()
+  })
+})
+
 function getSourceMapUrl(code: string): string {
   const regex = /\/\/[#@]\s(?:source(?:Mapping)?URL)=\s*(\S+)/g
   const results = regex.exec(code)

playground/worker/worker-nested-worker.js

@@ -1,3 +1,4 @@
+import ImportMetaGlobEagerWorker from './importMetaGlobEager.worker?worker'
 import SubWorker from './sub-worker?worker'
 
 const subWorker = new SubWorker()
@@ -27,5 +28,16 @@ classicWorker.addEventListener('message', (ev) => {
   })
 })
 
+const importMetaGlobEagerWorker = new ImportMetaGlobEagerWorker()
+
+importMetaGlobEagerWorker.postMessage('1')
+
+importMetaGlobEagerWorker.addEventListener('message', (ev) => {
+  self.postMessage({
+    type: 'importMetaGlobEager',
+    data: ev.data
+  })
+})
+
 // for sourcemap
 console.log('worker-nested-worker.js')

playground/worker/worker/main-module.js

@@ -3,7 +3,6 @@ import InlineWorker from '../my-worker?worker&inline'
 import mySharedWorker from '../my-shared-worker?sharedworker&name=shared'
 import TSOutputWorker from '../possible-ts-output-worker?worker'
 import NestedWorker from '../worker-nested-worker?worker'
-import ImportMetaGlobEagerWorker from '../importMetaGlobEager.worker?worker'
 import { mode } from '../modules/workerImport'
 
 function text(el, text) {
@@ -63,6 +62,8 @@ nestedWorker.addEventListener('message', (ev) => {
       text('.nested-worker-module', JSON.stringify(ev.data))
     } else if (data.type === 'constructor') {
       text('.nested-worker-constructor', JSON.stringify(ev.data))
+    } else if (data.type === 'importMetaGlobEager') {
+      text('.importMetaGlobEager-worker', JSON.stringify(ev.data))
     }
   }
 })
@@ -91,11 +92,3 @@ w2.port.addEventListener('message', (ev) => {
   text('.shared-worker-import-meta-url', JSON.stringify(ev.data))
 })
 w2.port.start()
-
-const importMetaGlobEagerWorker = new ImportMetaGlobEagerWorker()
-
-importMetaGlobEagerWorker.postMessage('1')
-
-importMetaGlobEagerWorker.addEventListener('message', (e) => {
-  text('.importMetaGlobEager-worker', JSON.stringify(e.data))
-})