Remove temporary dependency directory in analyze post action

Author: mbg

lib/analyze-action-post.js

@@ -3,13 +3,16 @@
  * It will run after the all steps in this job, in reverse order in relation to
  * other `post:` hooks.
  */
+import * as fs from "fs";
+
 import * as core from "@actions/core";
 
 import * as actionsUtil from "./actions-util";
 import { getGitHubVersion } from "./api-client";
 import { getCodeQL } from "./codeql";
 import { getConfig } from "./config-utils";
 import * as debugArtifacts from "./debug-artifacts";
+import { getJavaTempDependencyDir } from "./dependency-caching";
 import { EnvVar } from "./environment";
 import { getActionsLogger } from "./logging";
 import { checkGitHubVersionInRange, getErrorMessage } from "./util";
@@ -38,6 +41,20 @@ async function runWrapper() {
         );
       }
     }
+
+    // If we analysed Java in build-mode: none, we may have downloaded dependencies
+    // to the temp directory. Clean these up so they don't persist unnecessarily
+    // long on self-hosted runners.
+    const javaTempDependencyDir = getJavaTempDependencyDir();
+    if (fs.existsSync(javaTempDependencyDir)) {
+      try {
+        fs.rmSync(javaTempDependencyDir, { recursive: true });
+      } catch (error) {
+        logger.info(
+          `Failed to remove temporary Java dependencies directory: ${getErrorMessage(error)}`,
+        );
+      }
+    }
   } catch (error) {
     core.setFailed(
       `analyze post-action step failed: ${getErrorMessage(error)}`,