1 | var _fs
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2 | try {
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3 | _fs = require('graceful-fs')
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4 | } catch (_) {
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5 | _fs = require('fs')
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6 | }
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7 |
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8 | function readFile (file, options, callback) {
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9 | if (callback == null) {
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10 | callback = options
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11 | options = {}
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12 | }
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13 |
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14 | if (typeof options === 'string') {
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15 | options = {encoding: options}
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16 | }
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17 |
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18 | options = options || {}
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19 | var fs = options.fs || _fs
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20 |
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21 | var shouldThrow = true
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22 |
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23 | if ('passParsingErrors' in options) {
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24 | shouldThrow = options.passParsingErrors
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25 | } else if ('throws' in options) {
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26 | shouldThrow = options.throws
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27 | }
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28 |
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29 | fs.readFile(file, options, function (err, data) {
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30 | if (err) return callback(err)
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31 |
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32 | data = stripBom(data)
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33 |
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34 | var obj
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35 | try {
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36 | obj = JSON.parse(data, options ? options.reviver : null)
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37 | } catch (err2) {
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38 | if (shouldThrow) {
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39 | err2.message = file + ': ' + err2.message
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40 | return callback(err2)
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41 | } else {
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42 | return callback(null, null)
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43 | }
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44 | }
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45 |
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46 | callback(null, obj)
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47 | })
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48 | }
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49 |
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50 | function readFileSync (file, options) {
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51 | options = options || {}
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52 | if (typeof options === 'string') {
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53 | options = {encoding: options}
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54 | }
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55 |
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56 | var fs = options.fs || _fs
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57 |
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58 | var shouldThrow = true
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59 |
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60 | if ('passParsingErrors' in options) {
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61 | shouldThrow = options.passParsingErrors
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62 | } else if ('throws' in options) {
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63 | shouldThrow = options.throws
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64 | }
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65 |
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66 | try {
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67 | var content = fs.readFileSync(file, options)
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68 | content = stripBom(content)
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69 | return JSON.parse(content, options.reviver)
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70 | } catch (err) {
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71 | if (shouldThrow) {
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72 | err.message = file + ': ' + err.message
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73 | throw err
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74 | } else {
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75 | return null
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76 | }
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77 | }
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78 | }
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79 |
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80 | function writeFile (file, obj, options, callback) {
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81 | if (callback == null) {
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82 | callback = options
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83 | options = {}
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84 | }
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85 | options = options || {}
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86 | var fs = options.fs || _fs
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87 |
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88 | var spaces = typeof options === 'object' && options !== null
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89 | ? 'spaces' in options
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90 | ? options.spaces : this.spaces
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91 | : this.spaces
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92 |
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93 | var str = ''
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94 | try {
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95 | str = JSON.stringify(obj, options ? options.replacer : null, spaces) + '\n'
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96 | } catch (err) {
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97 |
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98 | if (callback) callback(err, null)
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99 | return
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100 | }
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101 |
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102 | fs.writeFile(file, str, options, callback)
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103 | }
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104 |
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105 | function writeFileSync (file, obj, options) {
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106 | options = options || {}
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107 | var fs = options.fs || _fs
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108 |
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109 | var spaces = typeof options === 'object' && options !== null
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110 | ? 'spaces' in options
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111 | ? options.spaces : this.spaces
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112 | : this.spaces
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113 |
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114 | var str = JSON.stringify(obj, options.replacer, spaces) + '\n'
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115 |
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116 | return fs.writeFileSync(file, str, options)
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117 | }
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118 |
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119 | function stripBom (content) {
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120 |
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121 | if (Buffer.isBuffer(content)) content = content.toString('utf8')
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122 | content = content.replace(/^\uFEFF/, '')
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123 | return content
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124 | }
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125 |
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126 | var jsonfile = {
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127 | spaces: null,
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128 | readFile: readFile,
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129 | readFileSync: readFileSync,
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130 | writeFile: writeFile,
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131 | writeFileSync: writeFileSync
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132 | }
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133 |
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134 | module.exports = jsonfile
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