浅析webpack源码之Stat.js粗解(十）

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从 compilation 出来接着我们看
const stats = new Stats(compilation);
Stats.js
log 大法，打印一下 stats
let Stats = {
compilation:{
_pluginCompat:
SyncBailHook {
_args: [Array],
taps: [Array],
interceptors: [],
call: [Function: lazyCompileHook],
promise: [Function: lazyCompileHook],
callAsync: [Function: lazyCompileHook],
_x: undefined },
hooks:
{buildModule: [SyncHook],
rebuildModule: [SyncHook],
failedModule: [SyncHook],
succeedModule: [SyncHook],
addEntry: [SyncHook],
failedEntry: [SyncHook],
succeedEntry: [SyncHook],
dependencyReference: [SyncWaterfallHook],
finishModules: [SyncHook],
finishRebuildingModule: [SyncHook],
unseal: [SyncHook],
seal: [SyncHook],
beforeChunks: [SyncHook],
afterChunks: [SyncHook],
optimizeDependenciesBasic: [SyncBailHook],
optimizeDependencies: [SyncBailHook],
optimizeDependenciesAdvanced: [SyncBailHook],
afterOptimizeDependencies: [SyncHook],
optimize: [SyncHook],
optimizeModulesBasic: [SyncBailHook],
optimizeModules: [SyncBailHook],
optimizeModulesAdvanced: [SyncBailHook],
afterOptimizeModules: [SyncHook],
optimizeChunksBasic: [SyncBailHook],
optimizeChunks: [SyncBailHook],
optimizeChunksAdvanced: [SyncBailHook],
afterOptimizeChunks: [SyncHook],
optimizeTree: [AsyncSeriesHook],
afterOptimizeTree: [SyncHook],
optimizeChunkModulesBasic: [SyncBailHook],
optimizeChunkModules: [SyncBailHook],
optimizeChunkModulesAdvanced: [SyncBailHook],
afterOptimizeChunkModules: [SyncHook],
shouldRecord: [SyncBailHook],
reviveModules: [SyncHook],
optimizeModuleOrder: [SyncHook],
advancedOptimizeModuleOrder: [SyncHook],
beforeModuleIds: [SyncHook],
moduleIds: [SyncHook],
optimizeModuleIds: [SyncHook],
afterOptimizeModuleIds: [SyncHook],
reviveChunks: [SyncHook],
optimizeChunkOrder: [SyncHook],
beforeChunkIds: [SyncHook],
optimizeChunkIds: [SyncHook],
afterOptimizeChunkIds: [SyncHook],
recordModules: [SyncHook],
recordChunks: [SyncHook],
beforeHash: [SyncHook],
contentHash: [SyncHook],
afterHash: [SyncHook],
recordHash: [SyncHook],
record: [SyncHook],
beforeModuleAssets: [SyncHook],
shouldGenerateChunkAssets: [SyncBailHook],
beforeChunkAssets: [SyncHook],
additionalChunkAssets: [SyncHook],
additionalAssets: [AsyncSeriesHook],
optimizeChunkAssets: [AsyncSeriesHook],
afterOptimizeChunkAssets: [SyncHook],
optimizeAssets: [AsyncSeriesHook],
afterOptimizeAssets: [SyncHook],
needAdditionalSeal: [SyncBailHook],
afterSeal: [AsyncSeriesHook],
chunkHash: [SyncHook],
moduleAsset: [SyncHook],
chunkAsset: [SyncHook],
assetPath: [SyncWaterfallHook],
needAdditionalPass: [SyncBailHook],
childCompiler: [SyncHook],
normalModuleLoader: [SyncHook],
optimizeExtractedChunksBasic: [SyncBailHook],
optimizeExtractedChunks: [SyncBailHook],
optimizeExtractedChunksAdvanced: [SyncBailHook],
afterOptimizeExtractedChunks: [SyncHook] },
name: undefined,
compiler: {
_pluginCompat: [SyncBailHook],
hooks: [Object],
name: undefined,
parentCompilation: undefined,
outputPath: ‘/Users/orion/Desktop/react-beauty-highcharts/dist’,
outputFileSystem: [NodeOutputFileSystem],
inputFileSystem: [CachedInputFileSystem],
recordsInputPath: undefined,
recordsOutputPath: undefined,
records: [Object],
removedFiles: Set {},
fileTimestamps: Map {},
contextTimestamps: Map {},
resolverFactory: [ResolverFactory],
resolvers: [Object],
options: [Object],
context: ‘/Users/orion/Desktop/react-beauty-highcharts’,
requestShortener: [RequestShortener],
running: true,
watchMode: false,
watchFileSystem: [NodeWatchFileSystem],
dependencies: undefined,
_lastCompilationFileDependencies: [SortableSet],
_lastCompilationContextDependencies: [SortableSet] },
resolverFactory:
ResolverFactory {
_pluginCompat: [SyncBailHook],
hooks: [Object],
cache1: [WeakMap],
cache2: [Map] },
inputFileSystem:
CachedInputFileSystem {
fileSystem: NodeJsInputFileSystem {},
_statStorage: [Storage],
_readdirStorage: [Storage],
_readFileStorage: [Storage],
_readJsonStorage: [Storage],
_readlinkStorage: [Storage],
_stat: [Function: bound bound],
_statSync: [Function: bound bound],
_readdir: [Function: bound readdir],
_readdirSync: [Function: bound readdirSync],
_readFile: [Function: bound bound readFile],
_readFileSync: [Function: bound bound readFileSync],
_readJson: [Function],
_readJsonSync: [Function],
_readlink: [Function: bound bound readlink],
_readlinkSync: [Function: bound bound readlinkSync] },
requestShortener:
RequestShortener {
currentDirectoryRegExp: /(^|!)\/Users\/orion\/Desktop\/react\-beauty\-highcharts/g,
parentDirectoryRegExp: /(^|!)\/Users\/orion\/Desktop/g,
buildinsAsModule: true,
buildinsRegExp:
/(^|!)\/Users\/orion\/Desktop\/react\-beauty\-highcharts\/node_modules\/webpack/g,
cache: [Map] },
options:
{entry: ‘./src/index.js’,
output: [Object],
module: [Object],
devServer: [Object],
externals: [Array],
mode: ‘development’,
plugins: [Array],
devtool: ‘eval-cheap-module-source-map’,
context: ‘/Users/orion/Desktop/react-beauty-highcharts’,
cache: true,
target: ‘web’,
node: [Object],
performance: false,
optimization: [Object],
resolve: [Object],
resolveLoader: [Object] },
outputOptions:
{filename: ‘index.js’,
path: ‘/Users/orion/Desktop/react-beauty-highcharts/dist’,
libraryTarget: ‘commonjs2’,
pathinfo: true,
chunkFilename: ‘[id].index.js’,
webassemblyModuleFilename: ‘[modulehash].module.wasm’,
library: ”,
hotUpdateFunction: ‘webpackHotUpdate’,
jsonpFunction: ‘webpackJsonp’,
chunkCallbackName: ‘webpackChunk’,
globalObject: ‘window’,
devtoolNamespace: ”,
sourceMapFilename: ‘[file].map[query]’,
hotUpdateChunkFilename: ‘[id].[hash].hot-update.js’,
hotUpdateMainFilename: ‘[hash].hot-update.json’,
crossOriginLoading: false,
jsonpScriptType: false,
chunkLoadTimeout: 120000,
hashFunction: ‘md4’,
hashDigest: ‘hex’,
hashDigestLength: 20,
devtoolLineToLine: false,
strictModuleExceptionHandling: false },
bail: undefined,
profile: undefined,
performance: false,
mainTemplate: {
_pluginCompat: [SyncBailHook],
outputOptions: [Object],
hooks: [Object],
requireFn: ‘__webpack_require__’ },
chunkTemplate: {
_pluginCompat: [SyncBailHook],
outputOptions: [Object],
hooks: [Object] },
hotUpdateChunkTemplate:{
_pluginCompat: [SyncBailHook],
outputOptions: [Object],
hooks: [Object] },
runtimeTemplate:{
outputOptions: [Object],
requestShortener: [RequestShortener] },
moduleTemplates:
{javascript: [ModuleTemplate], webassembly: [ModuleTemplate] },
semaphore:{
available: 100,
waiters: [],
_continue: [Function: bound _continue] },
entries: [[NormalModule] ],
_preparedEntrypoints: [[Object] ],
entrypoints: Map {‘main’ => [Entrypoint] },
chunks: [[Chunk] ],
chunkGroups: [[Entrypoint] ],
namedChunkGroups: Map {‘main’ => [Entrypoint] },
namedChunks: Map {‘main’ => [Chunk] },
modules: [[NormalModule] ],
_modules:{
‘/Users/orion/Desktop/react-beauty-highcharts/node_modules/babel-loader/lib/index.js!/Users/orion/Desktop/react-beauty-highcharts/src/index.js’ => [NormalModule] },
cache:
{‘m/Users/orion/Desktop/react-beauty-highcharts/node_modules/babel-loader/lib/index.js!/Users/orion/Desktop/react-beauty-highcharts/src/index.js’: [NormalModule],
chunkmain: [Object] },
records: {modules: [Object], chunks: [Object] },
additionalChunkAssets: [],
assets: {‘index.js’: [CachedSource] },
errors: [],
warnings: [],
children: [],
dependencyFactories:{
[Function] => NullFactory {},
[Function: WebAssemblyImportDependency] => [NormalModuleFactory],
[Function: WebAssemblyExportImportedDependency] => [NormalModuleFactory],
[Function: SingleEntryDependency] => [NormalModuleFactory],
[Function] => NullFactory {},
[Function] => NullFactory {},
[Function] => [NormalModuleFactory],
[Function] => [NormalModuleFactory],
[Function] => NullFactory {},
[Function] => NullFactory {},
[Function] => NullFactory {},
[Function] => [NormalModuleFactory],
[Function] => NullFactory {},
[Function] => [NormalModuleFactory],
[Function] => NullFactory {},
[Function] => [NormalModuleFactory],
[Function] => NullFactory {},
[Function] => [ContextModuleFactory],
[Function] => NullFactory {},
[Function] => NullFactory {},
[Function] => NullFactory {},
[Function] => [NormalModuleFactory],
[Function] => [ContextModuleFactory],
[Function] => [NormalModuleFactory],
[Function] => [ContextModuleFactory],
[Function] => NullFactory {},
[Function] => NullFactory {},
[Function: LoaderDependency] => [NormalModuleFactory],
[Function] => [NormalModuleFactory],
[Function] => [NormalModuleFactory],
[Function] => NullFactory {},
[Function] => [ContextModuleFactory],
[Function: ContextElementDependency] => [NormalModuleFactory],
[Function] => [NormalModuleFactory],
[Function] => [NormalModuleFactory],
[Function] => [NormalModuleFactory],
[Function] => [ContextModuleFactory] },
dependencyTemplates:{
‘hash’ => ”,
[Function] => ConstDependencyTemplate {},
[Function] => HarmonyExportDependencyTemplate {},
[Function] => HarmonyInitDependencyTemplate {},
[Function] => HarmonyImportSideEffectDependencyTemplate {},
[Function] => HarmonyImportSpecifierDependencyTemplate {},
[Function] => HarmonyExportDependencyTemplate {},
[Function] => HarmonyExportDependencyTemplate {},
[Function] => HarmonyExportSpecifierDependencyTemplate {},
[Function] => HarmonyExportImportedSpecifierDependencyTemplate {},
[Function] => HarmonyAcceptDependencyTemplate {},
[Function] => HarmonyAcceptImportDependencyTemplate {},
[Function] => AMDRequireDependencyTemplate {},
[Function] => ModuleDependencyTemplateAsRequireId {},
[Function] => AMDRequireArrayDependencyTemplate {},
[Function] => ContextDependencyTemplateAsRequireCall {},
[Function] => AMDDefineDependencyTemplate {},
[Function] => UnsupportedDependencyTemplate {},
[Function] => LocalModuleDependencyTemplate {},
[Function] => ModuleDependencyTemplateAsId {},
[Function] => ContextDependencyTemplateAsRequireCall {},
[Function] => ModuleDependencyTemplateAsId {},
[Function] => ContextDependencyTemplateAsId {},
[Function] => RequireResolveHeaderDependencyTemplate {},
[Function] => RequireHeaderDependencyTemplate {},
[Function] => RequireIncludeDependencyTemplate {},
[Function] => NullDependencyTemplate {},
[Function] => RequireEnsureDependencyTemplate {},
[Function] => ModuleDependencyTemplateAsRequireId {},
[Function] => ImportDependencyTemplate {},
[Function] => ImportEagerDependencyTemplate {},
[Function] => ImportDependencyTemplate {},
[Function] => ContextDependencyTemplateAsRequireCall {}},
childrenCounters: {},
usedChunkIds: null,
usedModuleIds: null,
fileTimestamps: Map {},
contextTimestamps: Map {},
compilationDependencies: Set {},
_buildingModules: Map {},
_rebuildingModules: Map {},
fullHash: ’41d7d3a4c3eeb4a7fe6a4dcb5b927f6b’,
hash: ’41d7d3a4c3eeb4a7fe6a’,
fileDependencies: {
‘/Users/orion/Desktop/react-beauty-highcharts/.babelrc’,
‘/Users/orion/Desktop/react-beauty-highcharts/src/index.js’,
_sortFn: undefined,
_lastActiveSortFn: undefined,
_cache: undefined,
_cacheOrderIndependent: undefined },
contextDependencies: {
_sortFn: undefined,
_lastActiveSortFn: null,
_cache: undefined,
_cacheOrderIndependent: undefined },
missingDependencies:{
_sortFn: undefined,
_lastActiveSortFn: null,
_cache: undefined,
_cacheOrderIndependent: undefined } },
hash: ’41d7d3a4c3eeb4a7fe6a’,
startTime: undefined,
endTime: undefined }
感觉之前所以的对象都放在了一个合集里，给人而全的感觉
里面主要含有一个对象 inputFileSyste，options，输出的 outputOptions，dependencyFactories 等给每次打包一个 hash 值，代表唯一性
天啊???? 我竟然恍然大悟，发现了惊天大秘密
jsonToString 函数
打印
‘Hash: \u001b[1m41d7d3a4c3eeb4a7fe6a\u001b[39m\u001b[22m\n
Version: webpack \u001b[1m4.28.2\u001b[39m\u001b[22m\n
Time: \u001b[1m500\u001b[39m\u001b[22mms\n
Built at: 2019-01-19 \u001b[1m16:48:03\u001b[39m\u001b[22m\n \u001b[1mAsset\u001b[39m\u001b[22m \u001b[1mSize\u001b[39m\u001b[22m \u001b[1mChunks\u001b[39m\u001b[22m \u001b[1m\u001b[39m\u001b[22m \u001b[1m\u001b[39m\u001b[22m\u001b[1mChunk Names\u001b[39m\u001b[22m\n\u001b[1m\u001b[32mindex.js\u001b[39m\u001b[22m 27.3 KiB \u001b[1mmain\u001b[39m\u001b[22m \u001b[1m\u001b[32m[emitted]\u001b[39m\u001b[22m main\n
Entrypoint \u001b[1mmain\u001b[39m\u001b[22m = \u001b[1m\u001b[32mindex.js\u001b[39m\u001b[22m\n
[\u001b[1m./src/index.js\u001b[39m\u001b[22m] 7.42 KiB {\u001b[1m\u001b[33mmain\u001b[39m\u001b[22m}\u001b[1m\u001b[32m [built]\u001b[39m\u001b[22m’
这不是就是平常我们 npm run build 的输出吗在终端上显示的页面
Hash: 41d7d3a4c3eeb4a7fe6a
Version: webpack 4.28.2
Time: 500ms
Built at: 2019-01-19 16:48:03
Asset Size Chunks Chunk Names
index.js 27.3 KiB main [emitted] main
Entrypoint main = index.js
[./src/index.js] 7.42 KiB {main} [built]
// obj 输出的对象，useColors 颜色配置
static jsonToString(obj, useColors){
// …
}
这个静态方法所做的事情就就是传入 JSON 对象和配置，返回字符串
toJson 函数
/* options = {context: ‘/Users/orion/Desktop/react-beauty-highcharts’,
colors: {level: 3, hasBasic: true, has256: true, has16m: true},
cached: false,
cachedAssets: false,
exclude: [‘node_modules’, ‘bower_components’, ‘components’],
infoVerbosity: ‘info’ }
forToString = true*/
toJson(options, forToString) {
// …

/*{errors: [],
warnings: [],
version: ‘4.28.2’,
hash: ’41d7d3a4c3eeb4a7fe6a’,
time: 623,
builtAt: 1547888599671,
assetsByChunkName: {main: ‘index.js’},
assets:
[{ name: ‘index.js’,
size: 27997,
chunks: [Array],
chunkNames: [Array],
emitted: true,
isOverSizeLimit: undefined } ],
filteredAssets: 0,
entrypoints:
{main:
{chunks: [Array],
assets: [Array],
children: {},
childAssets: {},
isOverSizeLimit: undefined } },
modules:
[{ id: ‘./src/index.js’,
identifier:
‘/Users/orion/Desktop/react-beauty-highcharts/node_modules/babel-loader/lib/index.js!/Users/orion/Desktop/react-beauty-highcharts/src/index.js’,
name: ‘./src/index.js’,
index: 0,
index2: 0,
size: 7597,
cacheable: true,
built: true,
optional: false,
prefetched: false,
chunks: [Array],
issuer: null,
issuerId: null,
issuerName: null,
issuerPath: null,
profile: undefined,
failed: false,
errors: 0,
warnings: 0 } ],
filteredModules: 0,
children: []}*/
retrun obj
}
不言而喻，toJson 函数主要做的是输出一些打包后的文件信息，大小，时间，hash，路径等
//toJson 后返回的对象传给 jsonToString
const obj = this.toJson(options, true);
return Stats.jsonToString(obj, useColors);
Stat.js 模块功能更多是辅助功能，就像它的名字一样，状态展示
选了一个 Baker-Miller pink，用 ps 简单勾画，目前的学习进度基本核心全在 chunk 压缩生成文件处理这里，想要深入，还需细细的研究????

正文完
发表至： javascript
2019-01-19
 0
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