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 王天杨
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import buildSourceMapTree from './build-source-map-tree';
import { traceMappings } from './source-map-tree';
import SourceMap from './source-map';
import type { SourceMapInput, SourceMapLoader, Options } from './types';
export type {
SourceMapSegment,
EncodedSourceMap,
EncodedSourceMap as RawSourceMap,
DecodedSourceMap,
SourceMapInput,
SourceMapLoader,
LoaderContext,
Options,
} from './types';
export type { SourceMap };
/**
* Traces through all the mappings in the root sourcemap, through the sources
* (and their sourcemaps), all the way back to the original source location.
*
* `loader` will be called every time we encounter a source file. If it returns
* a sourcemap, we will recurse into that sourcemap to continue the trace. If
* it returns a falsey value, that source file is treated as an original,
* unmodified source file.
*
* Pass `excludeContent` to exclude any self-containing source file content
* from the output sourcemap.
*
* Pass `decodedMappings` to receive a SourceMap with decoded (instead of
* VLQ encoded) mappings.
*/
export default function remapping(
input: SourceMapInput | SourceMapInput[],
loader: SourceMapLoader,
options?: boolean | Options,
): SourceMap {
const opts =
typeof options === 'object' ? options : { excludeContent: !!options, decodedMappings: false };
const tree = buildSourceMapTree(input, loader);
return new SourceMap(traceMappings(tree), opts);
}
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