| import type { Resolver } from 'webpack' | |
| const pluginSymbol = Symbol('OptionalPeerDependencyResolverPlugin') | |
| export class OptionalPeerDependencyResolverPlugin { | |
| apply(resolver: Resolver) { | |
| const target = resolver.ensureHook('raw-module') | |
| target.tapAsync( | |
| 'OptionalPeerDependencyResolverPlugin', | |
| (request, resolveContext, callback) => { | |
| // if we've already recursed into this plugin, we want to skip it | |
| if ((request as any)[pluginSymbol]) { | |
| return callback() | |
| } | |
| // popping the stack to prevent the recursion check | |
| resolveContext.stack?.delete(Array.from(resolveContext.stack).pop()!) | |
| resolver.doResolve( | |
| target, | |
| // when we call doResolve again, we need to make sure we don't | |
| // recurse into this plugin again | |
| { ...request, [pluginSymbol]: true } as any, | |
| null, | |
| resolveContext, | |
| (err, result) => { | |
| if ( | |
| !result && | |
| request?.descriptionFileData?.peerDependenciesMeta && | |
| request.request | |
| ) { | |
| const peerDependenciesMeta = request.descriptionFileData | |
| .peerDependenciesMeta as Record<string, { optional?: boolean }> | |
| const isOptional = | |
| peerDependenciesMeta && | |
| peerDependenciesMeta[request.request] && | |
| peerDependenciesMeta[request.request].optional | |
| if (isOptional) { | |
| return callback(null, { | |
| path: false, | |
| }) | |
| } | |
| } | |
| return callback(err, result) | |
| } | |
| ) | |
| } | |
| ) | |
| } | |
| } | |