Merge pull request #7761 from loganfsmyth/bad-map-merge
Reimplement input sourcemap merging using range matching instead of closest-position matching
This commit is contained in:
Logan Smyth
GitHub
commit
138d60922c
@ -26,22 +26,124 @@ declare module "lodash/defaults" {
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declare module "lodash/clone" {
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declare export default <T>(obj: T) => T;
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}
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}
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declare module "lodash/merge" {
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declare export default <T: Object>(T, Object) => T;
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}
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declare module "convert-source-map" {
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declare module "source-map" {
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declare export type SourceMap = {
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version: 3,
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file: ?string,
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sourceRoot: ?string,
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sources: [?string],
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sourcesContent: [?string],
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names: [?string],
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mappings: string,
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};
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declare module.exports: {
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SourceMapConsumer: typeof SourceMapConsumer,
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SourceMapGenerator: typeof SourceMapGenerator,
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}
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declare class SourceMapConsumer {
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static GENERATED_ORDER: 1;
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static ORIGINAL_ORDER: 2;
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file: string | null;
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sourceRoot: string | null;
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sources: Array<string>;
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constructor(?SourceMap): this;
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computeColumnSpans(): string;
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originalPositionFor({
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line: number,
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column: number,
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}): {|
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source: string,
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line: number,
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column: number,
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name: string | null
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|} | {|
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source: null,
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line: null,
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column: null,
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name: null
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|};
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generatedPositionFor({
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source: string,
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line: number,
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column: number,
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}): {|
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line: number,
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column: number,
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lastColumn: number | null | void,
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|} | {|
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line: null,
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column: null,
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lastColumn: null | void,
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|};
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allGeneratedPositionsFor({
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source: string,
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line: number,
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column: number,
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}): Array<{|
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line: number,
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column: number,
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lastColumn: number,
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|}>;
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sourceContentFor(string, boolean | void): string | null;
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eachMapping(
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({|
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generatedLine: number,
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generatedColumn: number,
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source: string,
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originalLine: number,
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originalColumn: number,
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name: string | null,
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|} | {|
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generatedLine: number,
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generatedColumn: number,
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source: null,
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originalLine: null,
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originalColumn: null,
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name: null,
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|}) => mixed,
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context: mixed,
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order: ?(1 | 2),
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): void;
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}
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declare class SourceMapGenerator {
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constructor(?{
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file?: string | null,
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sourceRoot?: string | null,
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skipValidation?: boolean | null,
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}): this;
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addMapping({
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generated: {
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line: number,
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column: number,
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}
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}): void;
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setSourceContent(string, string): void;
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toJSON(): SourceMap;
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}
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}
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declare module "convert-source-map" {
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import type { SourceMap } from "source-map";
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declare class Converter {
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toJSON(): string;
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toBase64(): string;
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@ -4,4 +4,4 @@ var foo = function foo() {
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return 4;
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};
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//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIm9yaWdpbmFsLmpzIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiI7O0FBQUEsVUFBVSxlO1MsQUFBTTtBQUFDIiwiZmlsZSI6InNjcmlwdDIuanMiLCJzb3VyY2VzQ29udGVudCI6WyJ2YXIgZm9vID0gKCkgPT4gNDsiXX0=
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//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIm9yaWdpbmFsLmpzIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiI7O0FBQUEsSUFBQSxNQUFVLFNBQVYsR0FBVSxHO1NBQU0sQztBQUFDLENBQWpCIiwiZmlsZSI6InNjcmlwdDIuanMiLCJzb3VyY2VzQ29udGVudCI6WyJ2YXIgZm9vID0gKCkgPT4gNDsiXX0=
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@ -2,10 +2,10 @@
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import type { PluginPasses } from "../../config";
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import convertSourceMap, { type SourceMap } from "convert-source-map";
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import sourceMap from "source-map";
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import generate from "@babel/generator";
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import type File from "./file";
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import mergeSourceMap from "./merge-map";
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export default function generateCode(
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pluginPasses: PluginPasses,
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@ -72,46 +72,3 @@ export default function generateCode(
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return { outputCode, outputMap };
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}
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function mergeSourceMap(inputMap: SourceMap, map: SourceMap): SourceMap {
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const inputMapConsumer = new sourceMap.SourceMapConsumer(inputMap);
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const outputMapConsumer = new sourceMap.SourceMapConsumer(map);
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const mergedGenerator = new sourceMap.SourceMapGenerator({
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file: inputMapConsumer.file,
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sourceRoot: inputMapConsumer.sourceRoot,
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});
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// This assumes the output map always has a single source, since Babel always compiles a
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// single source file to a single output file.
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const source = outputMapConsumer.sources[0];
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inputMapConsumer.eachMapping(function(mapping) {
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const generatedPosition = outputMapConsumer.generatedPositionFor({
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line: mapping.generatedLine,
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column: mapping.generatedColumn,
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source: source,
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});
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if (generatedPosition.column != null) {
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mergedGenerator.addMapping({
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source: mapping.source,
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original:
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mapping.source == null
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? null
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: {
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line: mapping.originalLine,
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column: mapping.originalColumn,
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},
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generated: generatedPosition,
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name: mapping.name,
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});
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}
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});
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const mergedMap = mergedGenerator.toJSON();
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inputMap.mappings = mergedMap.mappings;
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return inputMap;
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}
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319
packages/babel-core/src/transformation/file/merge-map.js
Normal file
319
packages/babel-core/src/transformation/file/merge-map.js
Normal file
@ -0,0 +1,319 @@
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// @flow
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import type { SourceMap } from "convert-source-map";
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import sourceMap from "source-map";
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export default function mergeSourceMap(
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inputMap: SourceMap,
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map: SourceMap,
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): SourceMap {
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const input = buildMappingData(inputMap);
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const output = buildMappingData(map);
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// Babel-generated maps always map to a single input filename.
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if (output.sources.length !== 1) {
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throw new Error("Assertion failure - expected a single output file");
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}
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const defaultSource = output.sources[0];
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const mergedGenerator = new sourceMap.SourceMapGenerator();
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for (const { source } of input.sources) {
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if (typeof source.content === "string") {
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mergedGenerator.setSourceContent(source.path, source.content);
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}
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}
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const insertedMappings = new Map();
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// Process each generated range in the input map, e.g. each range over the
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// code that Babel was originally given.
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eachInputGeneratedRange(input, (generated, original, source) => {
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// Then pick out each range over Babel's _output_ that corresponds with
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// the given range on the code given to Babel.
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eachOverlappingGeneratedOutputRange(defaultSource, generated, item => {
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// It's possible that multiple input ranges will overlap the same
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// generated range. Since sourcemap don't traditionally represent
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// generated locations with multiple original locations, we explicitly
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// skip generated locations once we've seen them the first time.
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const key = makeMappingKey(item);
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if (insertedMappings.has(key)) return;
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insertedMappings.set(key, item);
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mergedGenerator.addMapping({
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source: source.path,
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original: {
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line: original.line,
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column: original.columnStart,
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},
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generated: {
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line: item.line,
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column: item.columnStart,
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},
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name: original.name,
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});
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});
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});
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// Since mappings are manipulated using single locations, but are interpreted
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// as ranges, the insertions above may not actually have their ending
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// locations mapped yet. Here be go through each one and ensure that it has
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// a well-defined ending location, if one wasn't already created by the start
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// of a different range.
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for (const item of insertedMappings.values()) {
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if (item.columnEnd === Infinity) {
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continue;
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}
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const clearItem = {
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line: item.line,
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columnStart: item.columnEnd,
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};
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const key = makeMappingKey(clearItem);
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if (insertedMappings.has(key)) {
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continue;
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}
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// Insert mappings with no original position to terminate any mappings
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// that were found above, so that they don't expand beyond their correct
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// range.
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mergedGenerator.addMapping({
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generated: {
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line: clearItem.line,
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column: clearItem.columnStart,
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},
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});
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}
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const result = mergedGenerator.toJSON();
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// addMapping expects a relative path, and setSourceContent expects an
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// absolute path. To avoid this whole confusion, we leave the root out
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// entirely, and add it at the end here.
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if (typeof input.sourceRoot === "string") {
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result.sourceRoot = input.sourceRoot;
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}
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return result;
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}
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function makeMappingKey(item: { line: number, columnStart: number }) {
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return JSON.stringify([item.line, item.columnStart]);
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}
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function eachOverlappingGeneratedOutputRange(
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outputFile: ResolvedFileMappings,
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inputGeneratedRange: ResolvedGeneratedRange,
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callback: ResolvedGeneratedRange => mixed,
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) {
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// Find the Babel-generated mappings that overlap with this range in the
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// input sourcemap. Generated locations within the input sourcemap
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// correspond with the original locations in the map Babel generates.
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const overlappingOriginal = filterApplicableOriginalRanges(
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outputFile,
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inputGeneratedRange,
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);
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for (const { generated } of overlappingOriginal) {
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for (const item of generated) {
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callback(item);
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}
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}
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}
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function filterApplicableOriginalRanges(
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{ mappings }: ResolvedFileMappings,
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{ line, columnStart, columnEnd }: ResolvedGeneratedRange,
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): OriginalMappings {
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// The mapping array is sorted by original location, so we can
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// binary-search it for the overlapping ranges.
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return filterSortedArray(mappings, ({ original: outOriginal }) => {
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if (line > outOriginal.line) return -1;
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if (line < outOriginal.line) return 1;
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if (columnStart >= outOriginal.columnEnd) return -1;
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if (columnEnd <= outOriginal.columnStart) return 1;
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return 0;
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});
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}
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function eachInputGeneratedRange(
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map: ResolvedMappings,
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callback: (
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ResolvedGeneratedRange,
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ResolvedOriginalRange,
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ResolvedSource,
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) => mixed,
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) {
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for (const { source, mappings } of map.sources) {
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for (const { original, generated } of mappings) {
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for (const item of generated) {
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callback(item, original, source);
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}
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}
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}
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}
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type ResolvedMappings = {|
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file: ?string,
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sourceRoot: ?string,
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sources: Array<ResolvedFileMappings>,
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|};
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type ResolvedFileMappings = {|
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source: ResolvedSource,
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mappings: OriginalMappings,
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|};
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type OriginalMappings = Array<{|
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original: ResolvedOriginalRange,
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generated: Array<ResolvedGeneratedRange>,
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|}>;
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type ResolvedSource = {|
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path: string,
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content: string | null,
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|};
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type ResolvedOriginalRange = {|
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line: number,
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columnStart: number,
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columnEnd: number,
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name: string | null,
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|};
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type ResolvedGeneratedRange = {|
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line: number,
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columnStart: number,
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columnEnd: number,
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|};
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function buildMappingData(map: SourceMap): ResolvedMappings {
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const consumer = new sourceMap.SourceMapConsumer({
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...map,
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// This is a bit hack. .addMapping expects source values to be relative,
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// but eachMapping returns mappings with absolute paths. To avoid that
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// incompatibility, we leave the sourceRoot out here and add it to the
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// final map at the end instead.
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sourceRoot: null,
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});
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const sources = new Map();
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const mappings = new Map();
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let last = null;
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consumer.computeColumnSpans();
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consumer.eachMapping(
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m => {
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if (m.originalLine === null) return;
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let source = sources.get(m.source);
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if (!source) {
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source = {
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path: m.source,
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content: consumer.sourceContentFor(m.source, true),
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};
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sources.set(m.source, source);
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}
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let sourceData = mappings.get(source);
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if (!sourceData) {
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sourceData = {
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source,
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mappings: [],
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};
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mappings.set(source, sourceData);
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}
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const obj = {
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line: m.originalLine,
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columnStart: m.originalColumn,
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columnEnd: Infinity,
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name: m.name,
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};
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if (
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last &&
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last.source === source &&
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last.mapping.line === m.originalLine
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) {
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last.mapping.columnEnd = m.originalColumn;
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}
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last = {
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source,
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mapping: obj,
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};
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sourceData.mappings.push({
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original: obj,
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generated: consumer
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.allGeneratedPositionsFor({
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source: m.source,
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line: m.originalLine,
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column: m.originalColumn,
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})
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.map(item => ({
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line: item.line,
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columnStart: item.column,
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// source-map's lastColumn is inclusive, not exclusive, so we need
|
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// to add 1 to it.
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columnEnd: item.lastColumn + 1,
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})),
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});
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},
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null,
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sourceMap.SourceMapConsumer.ORIGINAL_ORDER,
|
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);
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return {
|
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file: map.file,
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sourceRoot: map.sourceRoot,
|
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sources: Array.from(mappings.values()),
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};
|
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}
|
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|
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function findInsertionLocation<T>(
|
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array: Array<T>,
|
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callback: T => number,
|
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): number {
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let left = 0;
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let right = array.length;
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while (left < right) {
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const mid = Math.floor((left + right) / 2);
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const item = array[mid];
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const result = callback(item);
|
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if (result === 0) {
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left = mid;
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break;
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}
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if (result >= 0) {
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right = mid;
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} else {
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left = mid + 1;
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}
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}
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// Ensure the value is the start of any set of matches.
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let i = left;
|
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if (i < array.length) {
|
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while (i > 0 && callback(array[i]) >= 0) {
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i--;
|
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}
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return i + 1;
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}
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return i;
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}
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function filterSortedArray<T>(
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array: Array<T>,
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callback: T => number,
|
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): Array<T> {
|
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const start = findInsertionLocation(array, callback);
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|
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const results = [];
|
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for (let i = start; i < array.length && callback(array[i]) === 0; i++) {
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results.push(array[i]);
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}
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return results;
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}
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@ -0,0 +1,12 @@
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{
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"version": 3,
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"sources": [
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"HelloWorld.vue"
|
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],
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"names": [],
|
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"mappings": ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;AAsFA;AACA;AACA;AACA;AACA;AACA;AACA;AACA",
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"sourceRoot": "src/components",
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"sourcesContent": [
|
||||
"<template>\n <div class=\"hello\">\n <h1>{{ msg }}</h1>\n <h2>Essential Links</h2>\n <ul>\n <li>\n <a\n href=\"https://vuejs.org\"\n target=\"_blank\"\n >\n Core Docs\n </a>\n </li>\n <li>\n <a\n href=\"https://forum.vuejs.org\"\n target=\"_blank\"\n >\n Forum\n </a>\n </li>\n <li>\n <a\n href=\"https://chat.vuejs.org\"\n target=\"_blank\"\n >\n Community Chat\n </a>\n </li>\n <li>\n <a\n href=\"https://twitter.com/vuejs\"\n target=\"_blank\"\n >\n Twitter\n </a>\n </li>\n <br>\n <li>\n <a\n href=\"http://vuejs-templates.github.io/webpack/\"\n target=\"_blank\"\n >\n Docs for This Template\n </a>\n </li>\n </ul>\n <h2>Ecosystem</h2>\n <ul>\n <li>\n <a\n href=\"http://router.vuejs.org/\"\n target=\"_blank\"\n >\n vue-router\n </a>\n </li>\n <li>\n <a\n href=\"http://vuex.vuejs.org/\"\n target=\"_blank\"\n >\n vuex\n </a>\n </li>\n <li>\n <a\n href=\"http://vue-loader.vuejs.org/\"\n target=\"_blank\"\n >\n vue-loader\n </a>\n </li>\n <li>\n <a\n href=\"https://github.com/vuejs/awesome-vue\"\n target=\"_blank\"\n >\n awesome-vue\n </a>\n </li>\n </ul>\n </div>\n</template>\n\n<script>\nexport default {\n name: 'HelloWorld',\n data () {\n return {\n msg: 'Welcome to Your Vue.js App'\n }\n }\n}\n</script>\n\n<!-- Add \"scoped\" attribute to limit CSS to this component only -->\n<style scoped>\nh1, h2 {\n font-weight: normal;\n}\nul {\n list-style-type: none;\n padding: 0;\n}\nli {\n display: inline-block;\n margin: 0 10px;\n}\na {\n color: #42b983;\n}\n</style>\n"
|
||||
]
|
||||
}
|
||||
113
packages/babel-core/test/fixtures/transformation/source-maps/input-source-map-complex/input.mjs
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Normal file
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||||
export default {
|
||||
name: 'HelloWorld',
|
||||
data () {
|
||||
return {
|
||||
msg: 'Welcome to Your Vue.js App'
|
||||
}
|
||||
}
|
||||
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||||
@ -0,0 +1,5 @@
|
||||
{
|
||||
"plugins": [
|
||||
"transform-modules-commonjs"
|
||||
]
|
||||
}
|
||||
120
packages/babel-core/test/fixtures/transformation/source-maps/input-source-map-complex/output.js
vendored
Normal file
120
packages/babel-core/test/fixtures/transformation/source-maps/input-source-map-complex/output.js
vendored
Normal file
@ -0,0 +1,120 @@
|
||||
"use strict";
|
||||
|
||||
Object.defineProperty(exports, "__esModule", {
|
||||
value: true
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
var _default = {
|
||||
name: 'HelloWorld',
|
||||
|
||||
data() {
|
||||
return {
|
||||
msg: 'Welcome to Your Vue.js App'
|
||||
};
|
||||
}
|
||||
|
||||
}; //
|
||||
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|
||||
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||||
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||||
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|
||||
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|
||||
|
||||
exports.default = _default;
|
||||
@ -0,0 +1,12 @@
|
||||
{
|
||||
"version": 3,
|
||||
"sources": [
|
||||
"HelloWorld.vue"
|
||||
],
|
||||
"names": [],
|
||||
"mappings": ";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;eAsFA;AACA,QAAA,YADA;;AAEA,SAAA;AACA,WAAA;AACA,WAAA;AADA,KAAA;AAGA;;AANA,C",
|
||||
"sourceRoot": "src/components",
|
||||
"sourcesContent": [
|
||||
"<template>\n <div class=\"hello\">\n <h1>{{ msg }}</h1>\n <h2>Essential Links</h2>\n <ul>\n <li>\n <a\n href=\"https://vuejs.org\"\n target=\"_blank\"\n >\n Core Docs\n </a>\n </li>\n <li>\n <a\n href=\"https://forum.vuejs.org\"\n target=\"_blank\"\n >\n Forum\n </a>\n </li>\n <li>\n <a\n href=\"https://chat.vuejs.org\"\n target=\"_blank\"\n >\n Community Chat\n </a>\n </li>\n <li>\n <a\n href=\"https://twitter.com/vuejs\"\n target=\"_blank\"\n >\n Twitter\n </a>\n </li>\n <br>\n <li>\n <a\n href=\"http://vuejs-templates.github.io/webpack/\"\n target=\"_blank\"\n >\n Docs for This Template\n </a>\n </li>\n </ul>\n <h2>Ecosystem</h2>\n <ul>\n <li>\n <a\n href=\"http://router.vuejs.org/\"\n target=\"_blank\"\n >\n vue-router\n </a>\n </li>\n <li>\n <a\n href=\"http://vuex.vuejs.org/\"\n target=\"_blank\"\n >\n vuex\n </a>\n </li>\n <li>\n <a\n href=\"http://vue-loader.vuejs.org/\"\n target=\"_blank\"\n >\n vue-loader\n </a>\n </li>\n <li>\n <a\n href=\"https://github.com/vuejs/awesome-vue\"\n target=\"_blank\"\n >\n awesome-vue\n </a>\n </li>\n </ul>\n </div>\n</template>\n\n<script>\nexport default {\n name: 'HelloWorld',\n data () {\n return {\n msg: 'Welcome to Your Vue.js App'\n }\n }\n}\n</script>\n\n<!-- Add \"scoped\" attribute to limit CSS to this component only -->\n<style scoped>\nh1, h2 {\n font-weight: normal;\n}\nul {\n list-style-type: none;\n padding: 0;\n}\nli {\n display: inline-block;\n margin: 0 10px;\n}\na {\n color: #42b983;\n}\n</style>\n"
|
||||
]
|
||||
}
|
||||
@ -0,0 +1,72 @@
|
||||
[
|
||||
{
|
||||
"generated": {
|
||||
"line": 92,
|
||||
"column": 15
|
||||
},
|
||||
"original": {
|
||||
"line": 87,
|
||||
"column": 0
|
||||
}
|
||||
},
|
||||
{
|
||||
"generated": {
|
||||
"line": 93,
|
||||
"column": 0
|
||||
},
|
||||
"original": {
|
||||
"line": 88,
|
||||
"column": 0
|
||||
}
|
||||
},
|
||||
{
|
||||
"generated": {
|
||||
"line": 95,
|
||||
"column": 9
|
||||
},
|
||||
"original": {
|
||||
"line": 89,
|
||||
"column": 0
|
||||
}
|
||||
},
|
||||
{
|
||||
"generated": {
|
||||
"line": 96,
|
||||
"column": 0
|
||||
},
|
||||
"original": {
|
||||
"line": 90,
|
||||
"column": 0
|
||||
}
|
||||
},
|
||||
{
|
||||
"generated": {
|
||||
"line": 97,
|
||||
"column": 0
|
||||
},
|
||||
"original": {
|
||||
"line": 91,
|
||||
"column": 0
|
||||
}
|
||||
},
|
||||
{
|
||||
"generated": {
|
||||
"line": 98,
|
||||
"column": 0
|
||||
},
|
||||
"original": {
|
||||
"line": 90,
|
||||
"column": 0
|
||||
}
|
||||
},
|
||||
{
|
||||
"generated": {
|
||||
"line": 99,
|
||||
"column": 0
|
||||
},
|
||||
"original": {
|
||||
"line": 93,
|
||||
"column": 0
|
||||
}
|
||||
}
|
||||
]
|
||||
@ -1,11 +1,7 @@
|
||||
{
|
||||
"version": 3,
|
||||
"mappings": "AAAA,UAAU,Y;SAAM,A;AAAC",
|
||||
"mappings": "AAAA,IAAA,MAAU,Y;SAAM,C;AAAC,CAAjB",
|
||||
"names": [],
|
||||
"sources": [
|
||||
"original.js"
|
||||
],
|
||||
"sourcesContent": [
|
||||
"var foo = () => 4;"
|
||||
]
|
||||
"sources": ["original.js"],
|
||||
"sourcesContent": ["var foo = () => 4;"],
|
||||
"version": 3
|
||||
}
|
||||
|
||||
@ -196,6 +196,11 @@ export default function get(entryLoc): Array<Suite> {
|
||||
if (fs.existsSync(sourceMapLoc)) {
|
||||
test.sourceMap = JSON.parse(readFile(sourceMapLoc));
|
||||
}
|
||||
|
||||
const inputMapLoc = taskDir + "/input-source-map.json";
|
||||
if (fs.existsSync(inputMapLoc)) {
|
||||
test.inputSourceMap = JSON.parse(readFile(inputMapLoc));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -325,6 +325,7 @@ function run(task) {
|
||||
sourceFileName: self.filename,
|
||||
sourceType: "script",
|
||||
babelrc: false,
|
||||
inputSourceMap: task.inputSourceMap || undefined,
|
||||
},
|
||||
opts,
|
||||
);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user