Save repo task object to storage

To create the interpreted and raw results from the SARIF/BQRS files, we
need some information from the repo task object. This will store the
repo task object to the filesystem as JSON so we can read them when
loading results.

Author: koesie10

extensions/ql-vscode/src/remote-queries/variant-analysis-results-manager.ts

@@ -25,6 +25,8 @@ export type ResultDownloadedEvent = {
 }
 
 export class VariantAnalysisResultsManager extends DisposableObject {
+  private static readonly REPO_TASK_FILENAME = 'repo_task.json';
+
   private readonly cachedResults: Map<CacheKey, VariantAnalysisScannedRepositoryResult>;
 
   private readonly _onResultDownloaded = this.push(new EventEmitter<ResultDownloadedEvent>());
@@ -59,6 +61,7 @@ export class VariantAnalysisResultsManager extends DisposableObject {
     );
 
     fs.mkdirSync(resultDirectory, { recursive: true });
+    await fs.outputJson(path.join(resultDirectory, VariantAnalysisResultsManager.REPO_TASK_FILENAME), repoTask);
     await fs.writeFile(path.join(resultDirectory, 'results.zip'), JSON.stringify(result, null, 2), 'utf8');
 
     this._onResultDownloaded.fire({
@@ -94,14 +97,16 @@ export class VariantAnalysisResultsManager extends DisposableObject {
       throw new Error('Variant analysis results not downloaded');
     }
 
+    const storageDirectory = this.getRepoStorageDirectory(variantAnalysisId, repositoryFullName);
+
+    const repoTask: VariantAnalysisRepoTask = await fs.readJson(path.join(storageDirectory, VariantAnalysisResultsManager.REPO_TASK_FILENAME));
+
     if (!repoTask.database_commit_sha || !repoTask.source_location_prefix) {
       throw new Error('Missing database commit SHA');
     }
 
     const fileLinkPrefix = this.createGitHubDotcomFileLinkPrefix(repoTask.repository.full_name, repoTask.database_commit_sha);
 
-    const storageDirectory = this.getRepoStorageDirectory(variantAnalysisId, repositoryFullName);
-
     const sarifPath = path.join(storageDirectory, 'results.sarif');
     const bqrsPath = path.join(storageDirectory, 'results.bqrs');
     if (await fs.pathExists(sarifPath)) {