feat: add exclude-sourcemap option

cmd/esbuild/main.go

@@ -125,6 +125,8 @@ var helpText = func(colors logger.Colors) string {
   --sourcemap=external      Do not link to the source map with a comment
   --sourcemap=inline        Emit the source map with an inline data URL
   --sources-content=false   Omit "sourcesContent" in generated source maps
+  --exclude-sourcemap=...   Exclude all files matching a regular expression from
+                            getting included in the source map
   --supported:F=...         Consider syntax F to be supported (true | false)
   --tree-shaking=...        Force tree shaking on or off (false | true)
   --tsconfig=...            Use this tsconfig.json file instead of other ones

internal/bundler/bundler.go

@@ -235,12 +235,18 @@ func parseFile(args parseArgs) {
 		source.Contents = ""
 	}
 
+	var omitSourceMap bool = false
+	if args.options.ExcludeSourceMap != nil {
+		omitSourceMap = args.options.ExcludeSourceMap.MatchString(args.prettyPath)
+	}
+
 	result := parseResult{
 		file: scannerFile{
 			inputFile: graph.InputFile{
 				Source:      source,
 				Loader:      loader,
 				SideEffects: args.sideEffects,
+				OmitFromSourceMaps: omitSourceMap,
 			},
 			pluginData: pluginData,
 		},
@@ -593,7 +599,7 @@ func parseFile(args parseArgs) {
 		}
 
 		// Attempt to parse the source map if present
-		if loader.CanHaveSourceMap() && args.options.SourceMap != config.SourceMapNone {
+		if loader.CanHaveSourceMap() && args.options.SourceMap != config.SourceMapNone && !omitSourceMap {
 			var sourceMapComment logger.Span
 			switch repr := result.file.inputFile.Repr.(type) {
 			case *graph.JSRepr:
@@ -1350,7 +1356,8 @@ func ScanBundle(
 					Repr: &graph.JSRepr{
 						AST: ast,
 					},
-					OmitFromSourceMapsAndMetafile: true,
+					OmitFromMetafile: true,
+					OmitFromSourceMaps: true,
 				},
 			},
 			ok: ok,
@@ -2250,7 +2257,8 @@ func (s *scanner) generateResultForGlobResolve(
 				Repr: &graph.JSRepr{
 					AST: ast,
 				},
-				OmitFromSourceMapsAndMetafile: true,
+				OmitFromMetafile: true,
+				OmitFromSourceMaps: true,
 			},
 		},
 		ok: true,
@@ -3156,7 +3164,7 @@ func (b *Bundle) generateMetadataJSON(results []graph.OutputFile, allReachableFi
 	// Write inputs
 	isFirst := true
 	for _, sourceIndex := range allReachableFiles {
-		if b.files[sourceIndex].inputFile.OmitFromSourceMapsAndMetafile {
+		if b.files[sourceIndex].inputFile.OmitFromMetafile {
 			continue
 		}
 		if file := &b.files[sourceIndex]; len(file.jsonMetadataChunk) > 0 {

internal/config/config.go

@@ -503,6 +503,7 @@ type Options struct {
 	NeedsMetafile          bool
 	SourceMap              SourceMap
 	ExcludeSourcesContent  bool
+	ExcludeSourceMap  *regexp.Regexp
 }
 
 type TSImportsNotUsedAsValues uint8

internal/graph/input.go

@@ -31,7 +31,8 @@ type InputFile struct {
 	Source      logger.Source
 	Loader      config.Loader
 
-	OmitFromSourceMapsAndMetafile bool
+	OmitFromMetafile bool
+	OmitFromSourceMaps bool
 }
 
 type OutputFile struct {

internal/linker/linker.go

@@ -5849,7 +5849,7 @@ func (c *linkerContext) generateChunkJS(chunkIndex int, chunkWaitGroup *sync.Wai
 		}
 
 		// Don't include the runtime in source maps
-		if c.graph.Files[compileResult.sourceIndex].InputFile.OmitFromSourceMapsAndMetafile {
+		if c.graph.Files[compileResult.sourceIndex].InputFile.OmitFromSourceMaps {
 			prevOffset.AdvanceString(string(compileResult.JS))
 			j.AddBytes(compileResult.JS)
 		} else {

lib/shared/common.ts

@@ -284,6 +284,7 @@ function flagsForBuildOptions(
   let write = getFlag(options, keys, 'write', mustBeBoolean) ?? writeDefault; // Default to true if not specified
   let allowOverwrite = getFlag(options, keys, 'allowOverwrite', mustBeBoolean)
   let mangleCache = getFlag(options, keys, 'mangleCache', mustBeObject)
+  let excludeSourceMap = getFlag(options, keys, 'excludeSourceMap', mustBeRegExp)
   keys.plugins = true; // "plugins" has already been read earlier
   checkForInvalidFlags(options, keys, `in ${callName}() call`)
 
@@ -305,6 +306,7 @@ function flagsForBuildOptions(
   if (assetNames) flags.push(`--asset-names=${assetNames}`)
   if (mainFields) flags.push(`--main-fields=${validateAndJoinStringArray(mainFields, 'main field')}`)
   if (conditions) flags.push(`--conditions=${validateAndJoinStringArray(conditions, 'condition')}`)
+  if (excludeSourceMap) flags.push(`--exclude-sourcemap=${jsRegExpToGoRegExp(excludeSourceMap)}`)
   if (external) for (let name of external) flags.push(`--external:${validateStringValue(name, 'external')}`)
   if (alias) {
     for (let old in alias) {

lib/shared/types.ts

@@ -168,6 +168,8 @@ export interface BuildOptions extends CommonOptions {
   absWorkingDir?: string
   /** Documentation: https://esbuild.github.io/api/#node-paths */
   nodePaths?: string[]; // The "NODE_PATH" variable from Node.js
+  /** Documentation: TODO */
+  excludeSourceMap?: RegExp
 }
 
 export interface StdinOptions {

pkg/api/api.go

@@ -277,6 +277,7 @@ type BuildOptions struct {
 	Sourcemap      SourceMap      // Documentation: https://esbuild.github.io/api/#sourcemap
 	SourceRoot     string         // Documentation: https://esbuild.github.io/api/#source-root
 	SourcesContent SourcesContent // Documentation: https://esbuild.github.io/api/#sources-content
+	ExcludeSourceMap string       // Documentation: TODO
 
 	Target    Target          // Documentation: https://esbuild.github.io/api/#target
 	Engines   []Engine        // Documentation: https://esbuild.github.io/api/#target

pkg/api/api_impl.go

@@ -1258,6 +1258,7 @@ func validateBuildOptions(
 		LegalComments:         validateLegalComments(buildOpts.LegalComments, buildOpts.Bundle),
 		SourceRoot:            buildOpts.SourceRoot,
 		ExcludeSourcesContent: buildOpts.SourcesContent == SourcesContentExclude,
+		ExcludeSourceMap:      validateRegex(log, "exclude source map", buildOpts.ExcludeSourceMap),
 		MinifySyntax:          buildOpts.MinifySyntax,
 		MinifyWhitespace:      buildOpts.MinifyWhitespace,
 		MinifyIdentifiers:     buildOpts.MinifyIdentifiers,

pkg/cli/cli_impl.go

@@ -372,6 +372,10 @@ func parseOptionsImpl(
 				}
 			}
 
+		case strings.HasPrefix(arg, "--exclude-sourcemap=") && buildOpts != nil:
+			value := arg[len("--exclude-sourcemap="):]
+			buildOpts.ExcludeSourceMap = value
+
 		case strings.HasPrefix(arg, "--sourcefile="):
 			if buildOpts != nil {
 				if buildOpts.Stdin == nil {
@@ -848,6 +852,7 @@ func parseOptionsImpl(
 				"cors-origin":        true,
 				"drop-labels":        true,
 				"entry-names":        true,
+				"exclude-sourcemap":  true,
 				"footer":             true,
 				"format":             true,
 				"global-name":        true,

scripts/js-api-tests.js

@@ -584,6 +584,33 @@ let buildTests = {
     assert.strictEqual(json.sourcesContent[0], content)
   },
 
+  async sourceMapExcludePaths({ esbuild, testDir }) {
+    const input1 = path.join(testDir, 'in1.js')
+    const input2 = path.join(testDir, 'in2.js')
+    const output = path.join(testDir, 'out.js')
+    const content1 = 'import { foo } from "./in2.js"; export {foo}'
+    const content2 = 'exports.foo = 123'
+    await Promise.all([
+      await writeFileAsync(input1, content1),
+      await writeFileAsync(input2, content2)
+    ])
+    await esbuild.build({
+      entryPoints: [input1],
+      outfile: output,
+      sourcemap: 'inline',
+      excludeSourceMap: /in2.js/,
+    })
+    const result = require(output)
+    assert.strictEqual(result.foo, 123)
+    const outputFile = await readFileAsync(output, 'utf8')
+    const match = /\/\/# sourceMappingURL=data:application\/json;base64,(.*)/.exec(outputFile)
+    const json = JSON.parse(Buffer.from(match[1], 'base64').toString())
+    assert.strictEqual(json.version, 3)
+    assert.strictEqual(json.sources.length, 1)
+    assert.strictEqual(json.sources[0], path.basename(input1))
+    assert.strictEqual(json.sourcesContent[0], content1)
+  },
+
   async resolveExtensionOrder({ esbuild, testDir }) {
     const input = path.join(testDir, 'in.js');
     const inputBare = path.join(testDir, 'module.js')