145 lines
4.7 KiB
JavaScript
145 lines
4.7 KiB
JavaScript
// src/build-source-map-tree.ts
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import { TraceMap } from "@jridgewell/trace-mapping";
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// src/source-map-tree.ts
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import { GenMapping, maybeAddSegment, setIgnore, setSourceContent } from "@jridgewell/gen-mapping";
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import { traceSegment, decodedMappings } from "@jridgewell/trace-mapping";
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var SOURCELESS_MAPPING = /* @__PURE__ */ SegmentObject("", -1, -1, "", null, false);
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var EMPTY_SOURCES = [];
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function SegmentObject(source, line, column, name, content, ignore) {
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return { source, line, column, name, content, ignore };
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}
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function Source(map, sources, source, content, ignore) {
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return {
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map,
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sources,
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source,
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content,
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ignore
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};
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}
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function MapSource(map, sources) {
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return Source(map, sources, "", null, false);
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}
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function OriginalSource(source, content, ignore) {
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return Source(null, EMPTY_SOURCES, source, content, ignore);
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}
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function traceMappings(tree) {
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const gen = new GenMapping({ file: tree.map.file });
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const { sources: rootSources, map } = tree;
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const rootNames = map.names;
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const rootMappings = decodedMappings(map);
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for (let i = 0; i < rootMappings.length; i++) {
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const segments = rootMappings[i];
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for (let j = 0; j < segments.length; j++) {
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const segment = segments[j];
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const genCol = segment[0];
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let traced = SOURCELESS_MAPPING;
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if (segment.length !== 1) {
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const source2 = rootSources[segment[1]];
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traced = originalPositionFor(
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source2,
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segment[2],
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segment[3],
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segment.length === 5 ? rootNames[segment[4]] : ""
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);
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if (traced == null) continue;
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}
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const { column, line, name, content, source, ignore } = traced;
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maybeAddSegment(gen, i, genCol, source, line, column, name);
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if (source && content != null) setSourceContent(gen, source, content);
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if (ignore) setIgnore(gen, source, true);
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}
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}
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return gen;
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}
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function originalPositionFor(source, line, column, name) {
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if (!source.map) {
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return SegmentObject(source.source, line, column, name, source.content, source.ignore);
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}
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const segment = traceSegment(source.map, line, column);
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if (segment == null) return null;
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if (segment.length === 1) return SOURCELESS_MAPPING;
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return originalPositionFor(
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source.sources[segment[1]],
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segment[2],
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segment[3],
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segment.length === 5 ? source.map.names[segment[4]] : name
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);
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}
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// src/build-source-map-tree.ts
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function asArray(value) {
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if (Array.isArray(value)) return value;
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return [value];
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}
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function buildSourceMapTree(input, loader) {
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const maps = asArray(input).map((m) => new TraceMap(m, ""));
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const map = maps.pop();
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for (let i = 0; i < maps.length; i++) {
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if (maps[i].sources.length > 1) {
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throw new Error(
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`Transformation map ${i} must have exactly one source file.
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Did you specify these with the most recent transformation maps first?`
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);
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}
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}
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let tree = build(map, loader, "", 0);
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for (let i = maps.length - 1; i >= 0; i--) {
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tree = MapSource(maps[i], [tree]);
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}
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return tree;
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}
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function build(map, loader, importer, importerDepth) {
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const { resolvedSources, sourcesContent, ignoreList } = map;
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const depth = importerDepth + 1;
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const children = resolvedSources.map((sourceFile, i) => {
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const ctx = {
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importer,
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depth,
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source: sourceFile || "",
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content: void 0,
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ignore: void 0
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};
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const sourceMap = loader(ctx.source, ctx);
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const { source, content, ignore } = ctx;
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if (sourceMap) return build(new TraceMap(sourceMap, source), loader, source, depth);
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const sourceContent = content !== void 0 ? content : sourcesContent ? sourcesContent[i] : null;
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const ignored = ignore !== void 0 ? ignore : ignoreList ? ignoreList.includes(i) : false;
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return OriginalSource(source, sourceContent, ignored);
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});
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return MapSource(map, children);
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}
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// src/source-map.ts
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import { toDecodedMap, toEncodedMap } from "@jridgewell/gen-mapping";
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var SourceMap = class {
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constructor(map, options) {
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const out = options.decodedMappings ? toDecodedMap(map) : toEncodedMap(map);
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this.version = out.version;
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this.file = out.file;
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this.mappings = out.mappings;
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this.names = out.names;
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this.ignoreList = out.ignoreList;
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this.sourceRoot = out.sourceRoot;
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this.sources = out.sources;
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if (!options.excludeContent) {
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this.sourcesContent = out.sourcesContent;
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}
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}
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toString() {
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return JSON.stringify(this);
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}
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};
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// src/remapping.ts
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function remapping(input, loader, options) {
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const opts = typeof options === "object" ? options : { excludeContent: !!options, decodedMappings: false };
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const tree = buildSourceMapTree(input, loader);
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return new SourceMap(traceMappings(tree), opts);
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}
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export {
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remapping as default
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};
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//# sourceMappingURL=remapping.mjs.map
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