[Typechain] generate types only for contracts and not test files

.changeset/calm-clouds-work.md

@@ -0,0 +1,6 @@
+---
+"@nomicfoundation/hardhat-typechain": patch
+"hardhat": patch
+---
+
+Replaced the hook for emitting compiled artifacts and updated its usage in the `hardhat-typechain` plugin.

v-next/hardhat-typechain/src/internal/hook-handlers/solidity.ts

@@ -1,30 +1,25 @@
 import type { HookContext, SolidityHooks } from "hardhat/types/hooks";
-import type { CompilationJob } from "hardhat/types/solidity";
 
 import { generateTypes } from "../generate-types.js";
 
 export default async (): Promise<Partial<SolidityHooks>> => {
   const handlers: Partial<SolidityHooks> = {
-    async onAllArtifactsEmitted(
+    async onCleanUpArtifacts(
       context: HookContext,
-      artifacts: Map<CompilationJob, ReadonlyMap<string, string[]>>,
+      artifactPaths: string[],
       next: (
         nextContext: HookContext,
-        artifacts: Map<CompilationJob, ReadonlyMap<string, string[]>>,
+        artifactPaths: string[],
       ) => Promise<void>,
     ) {
-      const artifactsPaths = Array.from(artifacts.values()).flatMap(
-        (innerMap) => Array.from(innerMap.values()).flat(),
-      );
-
       await generateTypes(
         context.config.paths.root,
         context.config.typechain,
         context.globalOptions.noTypechain,
-        artifactsPaths,
+        artifactPaths,
       );
 
-      return next(context, artifacts);
+      return next(context, artifactPaths);
     },
   };
 

v-next/hardhat/src/internal/builtin-plugins/solidity/build-system/build-system.ts

@@ -214,13 +214,6 @@ export class SolidityBuildSystemImplementation implements SolidityBuildSystem {
           );
         }),
       );
-
-      await this.#hooks.runHandlerChain(
-        "solidity",
-        "onAllArtifactsEmitted",
-        [contractArtifactsGeneratedByCompilationJob],
-        async () => {},
-      );
     }
 
     const resultsMap: Map<string, FileBuildResult> = new Map();
@@ -651,6 +644,13 @@ export class SolidityBuildSystemImplementation implements SolidityBuildSystem {
       duplicatedContractNamesDeclarationFilePath,
       getDuplicatedContractNamesDeclarationFile(duplicatedNames),
     );
+
+    await this.#hooks.runHandlerChain(
+      "solidity",
+      "onCleanUpArtifacts",
+      [artifactPaths],
+      async () => {},
+    );
   }
 
   public async compileBuildInfo(

v-next/hardhat/src/internal/builtin-plugins/solidity/type-extensions.ts

@@ -1,5 +1,4 @@
 import type { SolidityBuildSystem } from "../../../types/solidity/build-system.js";
-import type { CompilationJob } from "../../../types/solidity.js";
 
 import "../../../types/config.js";
 declare module "../../../types/config.js" {
@@ -99,19 +98,20 @@ declare module "../../../types/hooks.js" {
 
   export interface SolidityHooks {
     /**
-     * Provide a handler for this hook to retrieve all artifacts created by a compilation job.
+     * Hook triggered during the cleanup process of Solidity compilation artifacts.
+     * This hook runs after unused artifacts and build-info files have been removed.
      *
      * @param context The hook context.
-     * @param artifacts A map of the artifacts created by each compilation job.
+     * @param artifactPaths The file paths of artifacts that remain after cleanup.
      * @param next A function to call the next handler for this hook, or the
-     * default implementation if there are no more handlers.
+     * default implementation if no more handlers exist.
      */
-    onAllArtifactsEmitted: (
+    onCleanUpArtifacts: (
       context: HookContext,
-      artifacts: Map<CompilationJob, ReadonlyMap<string, string[]>>,
+      artifactPaths: string[],
       next: (
         nextContext: HookContext,
-        artifacts: Map<CompilationJob, ReadonlyMap<string, string[]>>,
+        artifactPaths: string[],
       ) => Promise<void>,
     ) => Promise<void>;
   }