1 | "use strict"
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2 | exports.__esModule = true
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3 |
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4 | const fs = require('fs')
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5 | const path = require('path')
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6 |
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7 | const hashObject = require('./hash').hashObject
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8 | , ModuleCache = require('./ModuleCache').default
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9 |
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10 | const CASE_INSENSITIVE = fs.existsSync(path.join(__dirname, 'reSOLVE.js'))
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11 | exports.CASE_INSENSITIVE = CASE_INSENSITIVE
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12 |
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13 | const fileExistsCache = new ModuleCache()
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14 |
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15 |
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16 | function fileExistsWithCaseSync(filepath, cacheSettings) {
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17 | const dir = path.dirname(filepath)
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18 |
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19 | let result = fileExistsCache.get(filepath, cacheSettings)
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20 | if (result != null) return result
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21 |
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22 |
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23 | if (dir === '/' || dir === '.' || /^[A-Z]:\\$/i.test(dir)) {
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24 | result = true
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25 | } else {
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26 | const filenames = fs.readdirSync(dir)
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27 | if (filenames.indexOf(path.basename(filepath)) === -1) {
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28 | result = false
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29 | } else {
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30 | result = fileExistsWithCaseSync(dir, cacheSettings)
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31 | }
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32 | }
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33 | fileExistsCache.set(filepath, result)
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34 | return result
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35 | }
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36 |
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37 | function relative(modulePath, sourceFile, settings) {
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38 |
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39 | const sourceDir = path.dirname(sourceFile)
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40 | , cacheKey = sourceDir + hashObject(settings).digest('hex') + modulePath
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41 |
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42 | const cacheSettings = ModuleCache.getSettings(settings)
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43 |
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44 | const cachedPath = fileExistsCache.get(cacheKey, cacheSettings)
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45 | if (cachedPath !== undefined) return cachedPath
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46 |
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47 | function cache(p) {
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48 | fileExistsCache.set(cacheKey, p)
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49 | return p
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50 | }
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51 |
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52 | function withResolver(resolver, config) {
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53 |
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54 | function v1() {
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55 | try {
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56 | const path = resolver.resolveImport(modulePath, sourceFile, config)
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57 | if (path === undefined) return { found: false }
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58 | return { found: true, path }
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59 | } catch (err) {
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60 | return { found: false }
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61 | }
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62 | }
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63 |
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64 | function v2() {
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65 | return resolver.resolve(modulePath, sourceFile, config)
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66 | }
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67 |
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68 | switch (resolver.interfaceVersion) {
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69 | case 2:
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70 | return v2()
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71 |
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72 | default:
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73 | case 1:
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74 | return v1()
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75 | }
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76 | }
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77 |
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78 | const configResolvers = (settings['import/resolver']
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79 | || { 'node': settings['import/resolve'] })
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80 |
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81 | const resolvers = resolverReducer(configResolvers, new Map())
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82 |
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83 | for (let pair of resolvers) {
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84 | let name = pair[0]
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85 | , config = pair[1]
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86 |
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87 | const resolver = requireResolver(name)
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88 |
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89 | const resolved = withResolver(resolver, config)
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90 | let resolvedPath = resolved.path
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91 |
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92 |
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93 | if (resolved.found && CASE_INSENSITIVE && !fileExistsWithCaseSync(resolvedPath, cacheSettings)) {
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94 |
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95 | resolvedPath = undefined
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96 | }
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97 |
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98 | if (resolved.found) return cache(resolvedPath)
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99 | }
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100 |
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101 | return cache(undefined)
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102 | }
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103 | exports.relative = relative
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104 |
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105 | function resolverReducer(resolvers, map) {
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106 | if (resolvers instanceof Array) {
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107 | resolvers.forEach(r => resolverReducer(r, map))
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108 | return map
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109 | }
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110 |
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111 | if (typeof resolvers === 'string') {
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112 | map.set(resolvers, null)
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113 | return map
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114 | }
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115 |
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116 | if (typeof resolvers === 'object') {
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117 | for (let key in resolvers) {
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118 | map.set(key, resolvers[key])
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119 | }
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120 | return map
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121 | }
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122 |
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123 | throw new Error('invalid resolver config')
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124 | }
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125 |
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126 | function requireResolver(name) {
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127 | try {
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128 | return require(`eslint-import-resolver-${name}`)
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129 | } catch (err) {
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130 | throw new Error(`unable to load resolver "${name}".`)
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131 | }
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132 | }
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133 |
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134 | const erroredContexts = new Set()
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135 |
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136 |
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137 |
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138 |
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139 |
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140 |
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141 |
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142 |
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143 |
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144 | function resolve(p, context) {
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145 | try {
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146 | return relative( p
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147 | , context.getFilename()
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148 | , context.settings
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149 | )
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150 | } catch (err) {
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151 | if (!erroredContexts.has(context)) {
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152 | context.report({
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153 | message: `Resolve error: ${err.message}`,
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154 | loc: { line: 1, col: 0 },
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155 | })
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156 | erroredContexts.add(context)
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157 | }
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158 | }
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159 | }
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160 | resolve.relative = relative
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161 | exports.default = resolve
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