1 | let _fs
|
2 | try {
|
3 | _fs = require('graceful-fs')
|
4 | } catch (_) {
|
5 | _fs = require('fs')
|
6 | }
|
7 | const universalify = require('universalify')
|
8 | const { stringify, stripBom } = require('./utils')
|
9 |
|
10 | async function _readFile (file, options = {}) {
|
11 | if (typeof options === 'string') {
|
12 | options = { encoding: options }
|
13 | }
|
14 |
|
15 | const fs = options.fs || _fs
|
16 |
|
17 | const shouldThrow = 'throws' in options ? options.throws : true
|
18 |
|
19 | let data = await universalify.fromCallback(fs.readFile)(file, options)
|
20 |
|
21 | data = stripBom(data)
|
22 |
|
23 | let obj
|
24 | try {
|
25 | obj = JSON.parse(data, options ? options.reviver : null)
|
26 | } catch (err) {
|
27 | if (shouldThrow) {
|
28 | err.message = `${file}: ${err.message}`
|
29 | throw err
|
30 | } else {
|
31 | return null
|
32 | }
|
33 | }
|
34 |
|
35 | return obj
|
36 | }
|
37 |
|
38 | const readFile = universalify.fromPromise(_readFile)
|
39 |
|
40 | function readFileSync (file, options = {}) {
|
41 | if (typeof options === 'string') {
|
42 | options = { encoding: options }
|
43 | }
|
44 |
|
45 | const fs = options.fs || _fs
|
46 |
|
47 | const shouldThrow = 'throws' in options ? options.throws : true
|
48 |
|
49 | try {
|
50 | let content = fs.readFileSync(file, options)
|
51 | content = stripBom(content)
|
52 | return JSON.parse(content, options.reviver)
|
53 | } catch (err) {
|
54 | if (shouldThrow) {
|
55 | err.message = `${file}: ${err.message}`
|
56 | throw err
|
57 | } else {
|
58 | return null
|
59 | }
|
60 | }
|
61 | }
|
62 |
|
63 | async function _writeFile (file, obj, options = {}) {
|
64 | const fs = options.fs || _fs
|
65 |
|
66 | const str = stringify(obj, options)
|
67 |
|
68 | await universalify.fromCallback(fs.writeFile)(file, str, options)
|
69 | }
|
70 |
|
71 | const writeFile = universalify.fromPromise(_writeFile)
|
72 |
|
73 | function writeFileSync (file, obj, options = {}) {
|
74 | const fs = options.fs || _fs
|
75 |
|
76 | const str = stringify(obj, options)
|
77 |
|
78 | return fs.writeFileSync(file, str, options)
|
79 | }
|
80 |
|
81 | const jsonfile = {
|
82 | readFile,
|
83 | readFileSync,
|
84 | writeFile,
|
85 | writeFileSync
|
86 | }
|
87 |
|
88 | module.exports = jsonfile
|