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Respect input source maps #6

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Respect input source maps #6

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22 changes: 19 additions & 3 deletions src/index.js
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Original file line number Diff line number Diff line change
@@ -1,13 +1,29 @@
const babel = require("@babel/core");

module.exports = {
process(src) {
process(src, filename, transformOptions) {
const options = {
babelrc: false,
compact: false,
plugins: [require.resolve("@babel/plugin-transform-modules-commonjs")]
plugins: [require.resolve("@babel/plugin-transform-modules-commonjs")],
// Ensures that babel respects original source maps. This allows to use
// already transpiled JavaScript source code and enables correct stack
// traces when tests fail.
inputSourceMap: true,

// To make sure filenames are accurate
filename: filename,
cwd: transformOptions.cwd,
};

return babel.transform(src, options).code;
const transformResult = babel.transform(src, options);
if (transformResult) {
const { code, map } = transformResult;
if (typeof code === 'string') {
return { code, map };
}
}

return src;
}
};