forked from istanbuljs/nyc
/
source-maps.js
105 lines (92 loc) · 2.99 KB
/
source-maps.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
'use strict'
const convertSourceMap = require('convert-source-map')
const libCoverage = require('istanbul-lib-coverage')
const libSourceMaps = require('istanbul-lib-source-maps')
const fs = require('./fs-promises')
const os = require('os')
const path = require('path')
const pMap = require('p-map')
class SourceMaps {
constructor (opts) {
this.cache = opts.cache
this.cacheDirectory = opts.cacheDirectory
this.loadedMaps = {}
this._sourceMapCache = libSourceMaps.createSourceMapStore()
}
cachedPath (source, hash) {
return path.join(
this.cacheDirectory,
`${path.parse(source).name}-${hash}.map`
)
}
purgeCache () {
this._sourceMapCache = libSourceMaps.createSourceMapStore()
this.loadedMaps = {}
}
extract (code, filename) {
const sourceMap = convertSourceMap.fromSource(code) || convertSourceMap.fromMapFileSource(code, path.dirname(filename))
return sourceMap ? sourceMap.toObject() : undefined
}
registerMap (filename, hash, sourceMap) {
if (!sourceMap) {
return
}
if (this.cache && hash) {
const mapPath = this.cachedPath(filename, hash)
fs.writeFileSync(mapPath, JSON.stringify(sourceMap))
} else {
this._sourceMapCache.registerMap(filename, sourceMap)
}
}
async remapCoverage (obj) {
const transformed = await this._sourceMapCache.transformCoverage(
libCoverage.createCoverageMap(obj)
)
return transformed.data
}
async reloadCachedSourceMaps (report) {
await pMap(
Object.entries(report),
async ([absFile, fileReport]) => {
if (!fileReport || !fileReport.contentHash) {
return
}
const hash = fileReport.contentHash
if (!(hash in this.loadedMaps)) {
try {
const mapPath = this.cachedPath(absFile, hash)
this.loadedMaps[hash] = JSON.parse(await fs.readFile(mapPath, 'utf8'))
} catch (e) {
// set to false to avoid repeatedly trying to load the map
this.loadedMaps[hash] = false
}
}
if (this.loadedMaps[hash]) {
this._sourceMapCache.registerMap(absFile, this.loadedMaps[hash])
}
},
{ concurrency: os.cpus().length }
)
}
/* istanbul ignore next: legacy function for istanbul-lib-processinfo */
reloadCachedSourceMapsSync (report) {
Object.entries(report).forEach(([absFile, fileReport]) => {
if (fileReport && fileReport.contentHash) {
const hash = fileReport.contentHash
if (!(hash in this.loadedMaps)) {
try {
const mapPath = this.cachedPath(absFile, hash)
this.loadedMaps[hash] = JSON.parse(fs.readFileSync(mapPath, 'utf8'))
} catch (e) {
// set to false to avoid repeatedly trying to load the map
this.loadedMaps[hash] = false
}
}
if (this.loadedMaps[hash]) {
this._sourceMapCache.registerMap(absFile, this.loadedMaps[hash])
}
}
})
}
}
module.exports = SourceMaps