运行时收集并存…

ExternalModule();needsTreeshakingPass

false;phase:

BuildPhase.LOAD_AND_PARSE;readonly

pluginDriver:

是交给用户在插件中可以调用的相关方法、属性可以看到多个插件的上下文共享同一个

pluginCache、graph

SetHookAction();constructor(private

readonly

NormalizedInputOptions,userPlugins:

readonly

[plugin,getPluginContext(plugin,

pluginCache,

NormalizedInputOptions,fileEmitter:

FileEmitter,existingPluginNames:

Setstring

不缓存plugin.name.startsWith(ANONYMOUS_PLUGIN_PREFIX)

||plugin.name.startsWith(ANONYMOUS_OUTPUT_PLUGIN_PREFIX)

||existingPluginNames.has(plugin.name))

{cacheable

{existingPluginNames.add(plugin.name);}}let

cacheInstance:

getCacheForUncacheablePlugin(plugin.name);}//

{addWatchFile(id)

this.error(errorInvalidRollupPhaseForAddWatchFile());}graph.watchFiles[id]

true;},cache:

第二次执行rollup的时候会执行console.log(this.cache.get(cache));}},

replace

pluginDriver.hookReduceArg0(transform,[currentSource,

id],transformReducer,(pluginContext,

plugin):

{transformDependencies.push(id);

this.addWatchFile

idpluginContext.addWatchFile(id);},cache:

pluginContext.cache:

getTrackedPluginCache(pluginContext.cache,

useCustomTransformCache),};});PluginDriver

asyn、first、parallel

sync。

first如果有多个插件实现此钩子则钩子按顺序运行直到钩子返回一个不是

null

的值。

sequential如果有多个插件实现此钩子则所有这些钩子将按指定的插件顺序运行。

如果钩子是

async则此类后续钩子将等待当前钩子解决后再运行。

parallel如果有多个插件实现此钩子则所有这些钩子将按指定的插件顺序运行。

如果钩子是

export

ParametersFunctionPluginHooks[H],replaceContext?:

ReplaceContext):

ReturnTypeFunctionPluginHooks[H]

null

ParametersFunctionPluginHooks[H],replaceContext?:

ReplaceContext):

里this.sortedPlugins,hookName,()

getSortedValidatedPlugins(hookName,

this.plugins,

getSortedValidatedPlugins(hookName:

keyof

遍历所有插件,根据指定hook(options、transform、...)提取插件for

(const

plugin);}normal.push(plugin);}}//

pre、normal、post

ParametersFunctionPluginHooks[H],replaceContext?:

ReplaceContext):

ReturnTypeFunctionPluginHooks[H]

null

this.getSortedPlugins(hookName))

{const

ParametersFunctionPluginHooks[H],replaceContext?:

ReplaceContext):

this.getSortedPlugins(hookName))

getSortedPlugins

Promise.all(parallelPromises);parallelPromises.length

0;await

{parallelPromises.push(this.runHook(hookName,

parameters,

this.pluginContexts.get(plugin)

获取到插件上下文供插件开发者使用

ParametersFunctionPluginHooks[H],plugin:

ReplaceContext):

ReturnTypeFunctionPluginHooks[H]

{const

this.pluginContexts.get(plugin)!;if

(replaceContext)

typescript-eslint/ban-typesreturn

(handler

this.pluginContexts.get(plugin)!;

PluginDriver

存储对应操作this.unfulfilledActions.add(action);return

Promise.resolve(hookResult).***n(result

action

fulfilledthis.unfulfilledActions.delete(action!);

钩子返回

{this.unfulfilledActions.delete(action);}return

plugin.name,