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fix: normalize sourcemap sources when generating from file name #10255

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fix: normalize sourcemap sources when generating from file name #10255

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24 changes: 22 additions & 2 deletions packages/babel-generator/src/source-map.js
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Expand Up @@ -7,8 +7,9 @@ import sourceMap from "source-map";
export default class SourceMap {
constructor(opts, code) {
this._cachedMap = null;
this._code = code;
this._opts = opts;
const { _opts, _code } = normalizeSourceFileName(opts, code);
this._code = _code;
this._opts = _opts;
this._rawMappings = [];
}

Expand Down Expand Up @@ -73,6 +74,9 @@ export default class SourceMap {
this._lastGenLine = generatedLine;
this._lastSourceLine = line;
this._lastSourceColumn = column;
if (filename) {
filename = filename.replace(/\\/g, "/");
}

// We are deliberately not using the `source-map` library here to allow
// callers to use these mappings without any overhead
Expand All @@ -94,3 +98,19 @@ export default class SourceMap {
});
}
}

function normalizeSourceFileName(opts, code) {
let _opts = opts;
const _code = code;
if (typeof code === "string") {
_opts = {
...opts,
sourceFileName: _opts.sourceFileName.replace(/\\/g, "/"),
};
} else if (typeof code === "object") {
Object.keys(code).forEach(sourceFileName => {
_code[sourceFileName.replace(/\\/g, "/")] = code[sourceFileName];
});
}
return { _opts, _code };
}