Show More
Commit Description:
merge
Commit Description:
merge
References:
File last commit:
Show/Diff file:
Action:
node_modules/merge-source-map/index.js
| 61 lines
| 1.8 KiB
| application/javascript
| JavascriptLexer
|
| r789 | var sourceMap = require('source-map') | |||
| var SourceMapConsumer = sourceMap.SourceMapConsumer | ||||
| var SourceMapGenerator = sourceMap.SourceMapGenerator | ||||
| module.exports = merge | ||||
| /** | ||||
| * Merge old source map and new source map and return merged. | ||||
| * If old or new source map value is falsy, return another one as it is. | ||||
| * | ||||
| * @param {object|string} [oldMap] old source map object | ||||
| * @param {object|string} [newmap] new source map object | ||||
| * @return {object|undefined} merged source map object, or undefined when both old and new source map are undefined | ||||
| */ | ||||
| function merge(oldMap, newMap) { | ||||
| if (!oldMap) | ||||
| return newMap | ||||
| if (!newMap) | ||||
| return oldMap | ||||
| var oldMapConsumer = new SourceMapConsumer(oldMap) | ||||
| var newMapConsumer = new SourceMapConsumer(newMap) | ||||
| var mergedMapGenerator = new SourceMapGenerator() | ||||
| // iterate on new map and overwrite original position of new map with one of old map | ||||
| newMapConsumer.eachMapping(function(m) { | ||||
| // pass when `originalLine` is null. | ||||
| // It occurs in case that the node does not have origin in original code. | ||||
| if (m.originalLine == null) | ||||
| return | ||||
| var origPosInOldMap = oldMapConsumer.originalPositionFor({line: m.originalLine, column: m.originalColumn}) | ||||
| if (origPosInOldMap.source == null) | ||||
| return | ||||
| mergedMapGenerator.addMapping({ | ||||
| original: { | ||||
| line: origPosInOldMap.line, | ||||
| column: origPosInOldMap.column | ||||
| }, | ||||
| generated: { | ||||
| line: m.generatedLine, | ||||
| column: m.generatedColumn | ||||
| }, | ||||
| source: origPosInOldMap.source, | ||||
| name: origPosInOldMap.name | ||||
| }) | ||||
| }) | ||||
| var mergedMap = JSON.parse(mergedMapGenerator.toString()) | ||||
| mergedMap.sourcesContent = mergedMap.sources.map(function (source) { | ||||
| return oldMapConsumer.sourceContentFor(source) | ||||
| }) | ||||
| mergedMap.sourceRoot = oldMap.sourceRoot | ||||
| return mergedMap | ||||
| } | ||||