Added option to transform the paths within a sourcemap. (#2430)

Resolves #2168.
rollup · Sep 13, 2018 · b67bf5b · b67bf5b
1 parent 007f42b
commit b67bf5b
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Showing 6 changed files with 32 additions and 3 deletions.
diff --git a/src/Chunk.ts b/src/Chunk.ts
@@ -1137,7 +1137,11 @@ export default class Chunk {
 					map = magicString.generateMap({ file, includeContent: true });
 				}
 
-				map.sources = map.sources.map(normalize);
+				map.sources = map.sources.map(sourcePath =>
+					normalize(
+						options.sourcemapPathTransform ? options.sourcemapPathTransform(sourcePath) : sourcePath
+					)
+				);
 
 				timeEnd('sourcemap', 3);
 			}

diff --git a/src/rollup/types.d.ts b/src/rollup/types.d.ts
@@ -284,6 +284,7 @@ export interface OutputOptions {
 	outro?: string | (() => string | Promise<string>);
 	sourcemap?: boolean | 'inline';
 	sourcemapFile?: string;
+	sourcemapPathTransform?: (sourcePath: string) => string;
 	interop?: boolean;
 	extend?: boolean;
 

diff --git a/src/utils/mergeOptions.ts b/src/utils/mergeOptions.ts
@@ -128,11 +128,14 @@ export default function mergeOptions({
 		'output option'
 	);
 
+	const validCliOutputOptions = validOutputOptions.filter(
+		option => option !== 'sourcemapPathTransform'
+	);
 	addUnknownOptionErrors(
 		unknownOptionErrors,
 		Object.keys(command),
 		validInputOptions.concat(
-			validOutputOptions,
+			validCliOutputOptions,
 			Object.keys(commandAliases),
 			'config',
 			'environment',
@@ -269,6 +272,7 @@ function getOutputOptions(
 		paths: getOption('paths'),
 		sourcemap: getOption('sourcemap'),
 		sourcemapFile: getOption('sourcemapFile'),
+		sourcemapPathTransform: getOption('sourcemapPathTransform'),
 		strict: getOption('strict', true)
 	};
 }

diff --git a/test/misc/optionList.js b/test/misc/optionList.js
diff --git a/test/sourcemaps/samples/transform-source-paths/_config.js b/test/sourcemaps/samples/transform-source-paths/_config.js
@@ -0,0 +1,19 @@
+const path = require('path');
+const assert = require('assert');
+
+module.exports = {
+	description: 'transform sourcemap paths (#2168)',
+	options: {
+		output: {
+			name: 'myModule',
+			file: path.resolve(__dirname, '_actual/bundle.js'),
+			sourcemapPathTransform: sourcePath => sourcePath.replace(
+				`..${path.sep}`,
+				'~/pkg-name/'
+			)
+		}
+	},
+	test(code, map) {
+		assert.deepEqual(map.sources, ['~/pkg-name/main.js']);
+	}
+};
diff --git a/test/sourcemaps/samples/transform-source-paths/main.js b/test/sourcemaps/samples/transform-source-paths/main.js
@@ -0,0 +1 @@
+export default 42;