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feat: use webpack esm server build (#474)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| // Based on https://github.com/webpack/webpack/blob/v4.46.0/lib/node/NodeMainTemplatePlugin.js#L81-L191 | ||
|
|
||
| import { Compiler } from 'webpack' | ||
| import Template from 'webpack/lib/Template' | ||
|
|
||
| export default class AsyncLoadingPlugin { | ||
| apply (compiler: Compiler) { | ||
| compiler.hooks.compilation.tap('AsyncLoading', (compilation) => { | ||
| const mainTemplate = compilation.mainTemplate | ||
| mainTemplate.hooks.requireEnsure.tap( | ||
| 'AsyncLoading', | ||
| (_source, chunk, hash) => { | ||
| const chunkFilename = mainTemplate.outputOptions.chunkFilename | ||
| const chunkMaps = chunk.getChunkMaps() | ||
| const insertMoreModules = [ | ||
| 'var moreModules = chunk.modules, chunkIds = chunk.ids;', | ||
| 'for(var moduleId in moreModules) {', | ||
| Template.indent( | ||
| mainTemplate.renderAddModule( | ||
| hash, | ||
| chunk, | ||
| 'moduleId', | ||
| 'moreModules[moduleId]' | ||
| ) | ||
| ), | ||
| '}' | ||
| ] | ||
| return Template.asString([ | ||
| '// Async chunk loading for Nitro', | ||
| '', | ||
| 'var installedChunkData = installedChunks[chunkId];', | ||
| 'if(installedChunkData !== 0) { // 0 means "already installed".', | ||
| Template.indent([ | ||
| '// array of [resolve, reject, promise] means "currently loading"', | ||
| 'if(installedChunkData) {', | ||
| Template.indent(['promises.push(installedChunkData[2]);']), | ||
| '} else {', | ||
| Template.indent([ | ||
| '// load the chunk and return promise to it', | ||
| 'var promise = new Promise(function(resolve, reject) {', | ||
| Template.indent([ | ||
| 'installedChunkData = installedChunks[chunkId] = [resolve, reject];', | ||
| 'import(' + | ||
| mainTemplate.getAssetPath( | ||
| JSON.stringify(`./${chunkFilename}`), | ||
| { | ||
| hash: `" + ${mainTemplate.renderCurrentHashCode( | ||
| hash | ||
| )} + "`, | ||
| hashWithLength: length => | ||
| `" + ${mainTemplate.renderCurrentHashCode( | ||
| hash, | ||
| length | ||
| )} + "`, | ||
| chunk: { | ||
| id: '" + chunkId + "', | ||
| hash: `" + ${JSON.stringify( | ||
| chunkMaps.hash | ||
| )}[chunkId] + "`, | ||
| hashWithLength: (length) => { | ||
| const shortChunkHashMap = {} | ||
| for (const chunkId of Object.keys(chunkMaps.hash)) { | ||
| if (typeof chunkMaps.hash[chunkId] === 'string') { | ||
| shortChunkHashMap[chunkId] = chunkMaps.hash[ | ||
| chunkId | ||
| ].substr(0, length) | ||
| } | ||
| } | ||
| return `" + ${JSON.stringify( | ||
| shortChunkHashMap | ||
| )}[chunkId] + "` | ||
| }, | ||
| contentHash: { | ||
| javascript: `" + ${JSON.stringify( | ||
| chunkMaps.contentHash.javascript | ||
| )}[chunkId] + "` | ||
| }, | ||
| contentHashWithLength: { | ||
| javascript: (length) => { | ||
| const shortContentHashMap = {} | ||
| const contentHash = | ||
| chunkMaps.contentHash.javascript | ||
| for (const chunkId of Object.keys(contentHash)) { | ||
| if (typeof contentHash[chunkId] === 'string') { | ||
| shortContentHashMap[chunkId] = contentHash[ | ||
| chunkId | ||
| ].substr(0, length) | ||
| } | ||
| } | ||
| return `" + ${JSON.stringify( | ||
| shortContentHashMap | ||
| )}[chunkId] + "` | ||
| } | ||
| }, | ||
| name: `" + (${JSON.stringify( | ||
| chunkMaps.name | ||
| )}[chunkId]||chunkId) + "` | ||
| }, | ||
| contentHashType: 'javascript' | ||
| } | ||
| ) + | ||
| ').then(chunk => {', | ||
| Template.indent( | ||
| insertMoreModules | ||
| .concat([ | ||
| 'var callbacks = [];', | ||
| 'for(var i = 0; i < chunkIds.length; i++) {', | ||
| Template.indent([ | ||
| 'if(installedChunks[chunkIds[i]])', | ||
| Template.indent([ | ||
| 'callbacks = callbacks.concat(installedChunks[chunkIds[i]][0]);' | ||
| ]), | ||
| 'installedChunks[chunkIds[i]] = 0;' | ||
| ]), | ||
| '}', | ||
| 'for(i = 0; i < callbacks.length; i++)', | ||
| Template.indent('callbacks[i]();') | ||
| ]) | ||
| ), | ||
| '});' | ||
| ]), | ||
| '});', | ||
| 'promises.push(installedChunkData[2] = promise);' | ||
| ]), | ||
| '}' | ||
| ]), | ||
| '}' | ||
| ]) | ||
| }) | ||
| }) | ||
| } | ||
| } |