new: Add a cleanup method to artifacts.

src/Artifact.ts

@@ -18,7 +18,15 @@ export default abstract class Artifact<T = unknown> {
     this.flags = flags;
   }
 
-  async run(options: PackemonOptions): Promise<void> {
+  cleanup(): Awaitable {}
+
+  preBuild(options: PackemonOptions): Awaitable {}
+
+  build(options: PackemonOptions): Awaitable {}
+
+  postBuild(options: PackemonOptions): Awaitable {}
+
+  async runBuild(options: PackemonOptions): Promise<void> {
     const start = Date.now();
 
     try {
@@ -38,12 +46,6 @@ export default abstract class Artifact<T = unknown> {
     this.result.time = Date.now() - start;
   }
 
-  preBuild(options: PackemonOptions): Awaitable {}
-
-  build(options: PackemonOptions): Awaitable {}
-
-  postBuild(options: PackemonOptions): Awaitable {}
-
   isComplete(): boolean {
     return this.state === 'passed' || this.state === 'failed';
   }

src/Package.ts

@@ -43,6 +43,10 @@ export default class Package {
     return artifact;
   }
 
+  async cleanup(): Promise<void> {
+    await Promise.all(this.artifacts.map((artifact) => artifact.cleanup()));
+  }
+
   getName(): string {
     return this.packageJson.name;
   }
@@ -110,7 +114,7 @@ export default class Package {
     }
 
     // Process artifacts in parallel
-    await Promise.all(this.artifacts.map((artifact) => artifact.run(options)));
+    await Promise.all(this.artifacts.map((artifact) => artifact.runBuild(options)));
 
     // Sync `package.json` in case it was modified
     await this.syncPackageJson();

src/Packemon.ts

@@ -102,6 +102,10 @@ export default class Packemon extends Contract<PackemonOptions> {
 
     const { errors } = await pipeline.run();
 
+    // Always cleanup whether a successful or failed build
+    await Promise.all(this.packages.map((pkg) => pkg.cleanup()));
+
+    // Throw to trigger an error screen in the terminal
     if (errors.length > 0) {
       throw errors[0];
     }

src/TypesArtifact.ts

@@ -16,6 +16,13 @@ const extractorConfig = require(path.join(__dirname, '../api-extractor.json')) a
 };
 
 export default class TypesArtifact extends Artifact {
+  private apiExtractorConfigPaths: string[] = [];
+
+  async cleanup(): Promise<void> {
+    // Absolute paths to each temporary config file
+    await Promise.all(this.apiExtractorConfigPaths.map((cfgPath) => fs.remove(cfgPath)));
+  }
+
   async build(): Promise<void> {
     const tsConfig = this.package.tsconfigJson;
 
@@ -95,8 +102,8 @@ export default class TypesArtifact extends Artifact {
       );
     }
 
-    // Remove the config file
-    await fs.unlink(configPath);
+    // Enqueue to remove the config file
+    this.apiExtractorConfigPaths.push(configPath);
 
     return result;
   }