58 lines
1.9 KiB
JavaScript
58 lines
1.9 KiB
JavaScript
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const convertSourceMap = require('convert-source-map')
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const libCoverage = require('istanbul-lib-coverage')
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const libSourceMaps = require('istanbul-lib-source-maps')
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const fs = require('fs')
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const path = require('path')
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// TODO: write some unit tests for this class.
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function SourceMaps (opts) {
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this.cache = opts.cache
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this.cacheDirectory = opts.cacheDirectory
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this.sourceMapCache = libSourceMaps.createSourceMapStore()
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this.loadedMaps = {}
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}
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SourceMaps.prototype.extractAndRegister = function (code, filename, hash) {
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var sourceMap = convertSourceMap.fromSource(code) || convertSourceMap.fromMapFileSource(code, path.dirname(filename))
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if (sourceMap) {
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if (this.cache && hash) {
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var mapPath = path.join(this.cacheDirectory, hash + '.map')
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fs.writeFileSync(mapPath, sourceMap.toJSON())
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} else {
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this.sourceMapCache.registerMap(filename, sourceMap.sourcemap)
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}
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}
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return sourceMap
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}
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SourceMaps.prototype.remapCoverage = function (obj) {
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var transformed = this.sourceMapCache.transformCoverage(
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libCoverage.createCoverageMap(obj)
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)
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return transformed.map.data
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}
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SourceMaps.prototype.reloadCachedSourceMaps = function (report) {
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var _this = this
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Object.keys(report).forEach(function (absFile) {
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var fileReport = report[absFile]
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if (fileReport && fileReport.contentHash) {
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var hash = fileReport.contentHash
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if (!(hash in _this.loadedMaps)) {
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try {
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var mapPath = path.join(_this.cacheDirectory, hash + '.map')
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_this.loadedMaps[hash] = JSON.parse(fs.readFileSync(mapPath, 'utf8'))
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} catch (e) {
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// set to false to avoid repeatedly trying to load the map
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_this.loadedMaps[hash] = false
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}
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}
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if (_this.loadedMaps[hash]) {
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_this.sourceMapCache.registerMap(absFile, _this.loadedMaps[hash])
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}
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}
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})
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}
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module.exports = SourceMaps
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