24 lines
931 B
Plaintext
24 lines
931 B
Plaintext
import { existsSync, readFileSync } from 'node:fs';
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import path from 'node:path';
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import convertSourceMap from 'convert-source-map';
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// based on vite
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// https://github.com/vitejs/vite/blob/84079a84ad94de4c1ef4f1bdb2ab448ff2c01196/packages/vite/src/node/server/sourcemap.ts#L149
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function extractSourcemapFromFile(code, filePath) {
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const map = (convertSourceMap.fromSource(code) || convertSourceMap.fromMapFileSource(code, createConvertSourceMapReadMap(filePath)))?.toObject();
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return map ? { map } : undefined;
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}
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function createConvertSourceMapReadMap(originalFileName) {
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return (filename) => {
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// convertSourceMap can detect invalid filename from comments.
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// fallback to empty source map to avoid errors.
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const targetPath = path.resolve(path.dirname(originalFileName), filename);
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if (existsSync(targetPath)) {
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return readFileSync(targetPath, "utf-8");
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}
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return "{}";
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};
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}
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export { extractSourcemapFromFile };
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