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// A basic implementation to allow loaders access to loaderContext.currentTraceSpan
import type { Span } from '../../../trace'
import { getRspackCore } from '../../../shared/lib/get-rspack'
const pluginName = 'RspackProfilingPlugin'
const moduleSpansByCompilation = new WeakMap()
export const compilationSpans: WeakMap<any, Span> = new WeakMap()
export class RspackProfilingPlugin {
runWebpackSpan: Span
constructor({ runWebpackSpan }: { runWebpackSpan: Span }) {
this.runWebpackSpan = runWebpackSpan
}
apply(compiler: any) {
compiler.hooks.thisCompilation.tap(
{ name: pluginName, stage: -Infinity },
(compilation: any) => {
const rspack = getRspackCore()
moduleSpansByCompilation.set(compilation, new WeakMap())
compilationSpans.set(
compilation,
this.runWebpackSpan.traceChild('compilation-' + compilation.name)
)
const compilationSpan = this.runWebpackSpan.traceChild(
`compilation-${compilation.name}`
)
const moduleHooks = rspack.NormalModule.getCompilationHooks(compilation)
moduleHooks.loader.tap(
pluginName,
(loaderContext: any, module: any) => {
const moduleSpan = moduleSpansByCompilation
.get(compilation)
?.get(module)
loaderContext.currentTraceSpan = moduleSpan
}
)
compilation.hooks.buildModule.tap(pluginName, (module: any) => {
const span = compilationSpan.traceChild('build-module')
span.setAttribute('name', module.userRequest)
span.setAttribute('layer', module.layer)
moduleSpansByCompilation?.get(compilation)?.set(module, span)
})
compilation.hooks.succeedModule.tap(pluginName, (module: any) => {
moduleSpansByCompilation?.get(compilation)?.get(module)?.stop()
})
}
)
}
}
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