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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 | 1x 1x 1x 1x 1x 1x 63x 62x 63x 31x 9x 9x 9x 9x 9x 22x 22x 5x 31x 31x 31x 14x 34x 34x 34x 24x 31x 31x 31x 10x 10x 10x 10x 31x 31x 9x 14x 14x 14x 14x 32x 32x 7x 7x 25x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 1x 4x 4x 4x 4x 4x 63x 32x 32x 32x 32x 32x 1x 1x 1x 31x 31x 31x 31x 31x | 'use-strict' const validMagicStrings = [ 'webpackMode', // 'webpackMagicChunkName' gets dealt with current implementation & naming/renaming strategy 'webpackInclude', 'webpackExclude', 'webpackIgnore', 'webpackPreload', 'webpackPrefetch' ] const { addDefault } = require('@babel/helper-module-imports') const path = require('path') const visited = Symbol('visited') const IMPORT_UNIVERSAL_DEFAULT = { id: Symbol('universalImportId'), source: 'babel-plugin-universal-import/universalImport', nameHint: 'universalImport' } const IMPORT_PATH_DEFAULT = { id: Symbol('pathId'), source: 'path', nameHint: 'path' } function getImportArgPath(p) { return p.parentPath.get('arguments')[0] } function trimChunkNameBaseDir(baseDir) { return baseDir.replace(/^[./]+|(\.js$)/g, '') } function getImport(p, { source, nameHint }) { return addDefault(p, source, { nameHint }) } function createTrimmedChunkName(t, importArgNode) { if (importArgNode.quasis) { let quasis = importArgNode.quasis.slice(0) const baseDir = trimChunkNameBaseDir(quasis[0].value.cooked) quasis[0] = Object.assign({}, quasis[0], { value: { raw: baseDir, cooked: baseDir } }) quasis = quasis.map((quasi, i) => (i > 0 ? prepareQuasi(quasi) : quasi)) return Object.assign({}, importArgNode, { quasis }) } const moduleName = trimChunkNameBaseDir(importArgNode.value) return t.stringLiteral(moduleName) } function prepareQuasi(quasi) { return Object.assign({}, quasi, { value: { raw: quasi.value.cooked, cooked: quasi.value.cooked } }) } function getMagicWebpackComments(importArgNode) { const { leadingComments } = importArgNode const results = [] if (leadingComments && leadingComments.length) { leadingComments.forEach(comment => { try { const validMagicString = validMagicStrings.filter(str => new RegExp(`${str}\\w*:`).test(comment.value) ) // keep this comment if we found a match if (validMagicString && validMagicString.length === 1) { results.push(comment) } } catch (e) { // eat the error, but don't give up } }) } return results } function getMagicCommentChunkName(importArgNode) { const { quasis, expressions } = importArgNode if (!quasis) return trimChunkNameBaseDir(importArgNode.value) const baseDir = quasis[0].value.cooked const hasExpressions = expressions.length > 0 const chunkName = baseDir + (hasExpressions ? '[request]' : '') return trimChunkNameBaseDir(chunkName) } function getComponentId(t, importArgNode) { const { quasis, expressions } = importArgNode if (!quasis) return importArgNode.value return quasis.reduce((str, quasi, i) => { const q = quasi.value.cooked const id = expressions[i] && expressions[i].name str += id ? `${q}\${${id}}` : q return str }, '') } function existingMagicCommentChunkName(importArgNode) { const { leadingComments } = importArgNode if ( leadingComments && leadingComments.length && leadingComments[0].value.indexOf('webpackChunkName') !== -1 ) { try { return leadingComments[0].value .split('webpackChunkName:')[1] .replace(/["']/g, '') .trim() } catch (e) { return null } } return null } function idOption(t, importArgNode) { const id = getComponentId(t, importArgNode) return t.objectProperty(t.identifier('id'), t.stringLiteral(id)) } function fileOption(t, p) { return t.objectProperty( t.identifier('file'), t.stringLiteral( path.relative(__dirname, p.hub.file.opts.filename || '') || '' ) ) } function loadOption(t, loadTemplate, p, importArgNode) { const argPath = getImportArgPath(p) const generatedChunkName = getMagicCommentChunkName(importArgNode) const otherValidMagicComments = getMagicWebpackComments(importArgNode) const existingChunkName = t.existingChunkName const chunkName = existingChunkName || generatedChunkName delete argPath.node.leadingComments argPath.addComment('leading', ` webpackChunkName: '${chunkName}' `) otherValidMagicComments.forEach(validLeadingComment => argPath.addComment('leading', validLeadingComment.value) ) const load = loadTemplate({ IMPORT: argPath.parent }).expression return t.objectProperty(t.identifier('load'), load) } function pathOption(t, pathTemplate, p, importArgNode) { const path = pathTemplate({ PATH: getImport(p, IMPORT_PATH_DEFAULT), MODULE: importArgNode }).expression return t.objectProperty(t.identifier('path'), path) } function resolveOption(t, resolveTemplate, importArgNode) { const resolve = resolveTemplate({ MODULE: importArgNode }).expression return t.objectProperty(t.identifier('resolve'), resolve) } function chunkNameOption(t, chunkNameTemplate, importArgNode) { const existingChunkName = t.existingChunkName const generatedChunk = createTrimmedChunkName(t, importArgNode) const trimmedChunkName = existingChunkName ? t.stringLiteral(existingChunkName) : generatedChunk const chunkName = chunkNameTemplate({ MODULE: trimmedChunkName }).expression return t.objectProperty(t.identifier('chunkName'), chunkName) } module.exports = function universalImportPlugin({ types: t, template }) { const chunkNameTemplate = template('() => MODULE') const pathTemplate = template('() => PATH.join(__dirname, MODULE)') const resolveTemplate = template('() => require.resolveWeak(MODULE)') const loadTemplate = template( '() => Promise.all([IMPORT]).then(proms => proms[0])' ) return { name: 'universal-import', visitor: { Import(p) { if (p[visited]) return p[visited] = true const importArgNode = getImportArgPath(p).node t.existingChunkName = existingMagicCommentChunkName(importArgNode) // no existing chunkname, no problem - we will reuse that for fixing nested chunk names const universalImport = getImport(p, IMPORT_UNIVERSAL_DEFAULT) // if being used in an await statement, return load() promise if ( p.parentPath.parentPath.isYieldExpression() || // await transformed already t.isAwaitExpression(p.parentPath.parentPath.node) // await not transformed already ) { const func = t.callExpression(universalImport, [ loadOption(t, loadTemplate, p, importArgNode).value, t.booleanLiteral(false) ]) p.parentPath.replaceWith(func) return } const opts = (this.opts.babelServer ? [ idOption(t, importArgNode), this.opts.includeFileName ? fileOption(t, p) : undefined, pathOption(t, pathTemplate, p, importArgNode), resolveOption(t, resolveTemplate, importArgNode), chunkNameOption(t, chunkNameTemplate, importArgNode) ] : [ idOption(t, importArgNode), this.opts.includeFileName ? fileOption(t, p) : undefined, loadOption(t, loadTemplate, p, importArgNode), // only when not on a babel-server pathOption(t, pathTemplate, p, importArgNode), resolveOption(t, resolveTemplate, importArgNode), chunkNameOption(t, chunkNameTemplate, importArgNode) ] ).filter(Boolean) const options = t.objectExpression(opts) const func = t.callExpression(universalImport, [options]) delete t.existingChunkName p.parentPath.replaceWith(func) } } } } |