New setting to specify number of paths per alert

extensions/ql-vscode/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - Add support for filename pattern in history view. [#930](https://github.com/github/vscode-codeql/pull/930)
 - Add an option _View Results (CSV)_ to view the results of a non-alert query. The existing options for alert queries have been renamed to _View Alerts_ to avoid confusion. [#929](https://github.com/github/vscode-codeql/pull/929)
+- Allow users to specify the number of paths to display for each alert. [#931](https://github.com/github/vscode-codeql/pull/931)
 
 ## 1.5.3 - 18 August 2021
 

extensions/ql-vscode/package.json

@@ -180,6 +180,11 @@
           "default": false,
           "description": "Enable debug logging and tuple counting when running CodeQL queries. This information is useful for debugging query performance."
         },
+        "codeQL.runningQueries.maxPaths": {
+          "type": "integer",
+          "default": 4,
+          "markdownDescription": "Max number of paths to display for each alert found by a path query (`@kind path-problem`)."
+        },
         "codeQL.runningQueries.autoSave": {
           "type": "boolean",
           "default": false,

extensions/ql-vscode/src/cli.ts

@@ -649,6 +649,11 @@ export class CodeQLCliServer implements Disposable {
       this.cliConfig.numberThreads.toString(),
     );
 
+    args.push(
+      '--max-paths',
+      this.cliConfig.maxPaths.toString(),
+    );
+
     args.push(resultsPath);
     await this.runCodeQlCliCommand(['bqrs', 'interpret'], args, 'Interpreting query results');
   }

extensions/ql-vscode/src/config.ts

@@ -79,6 +79,7 @@ const CACHE_SIZE_SETTING = new Setting('cacheSize', RUNNING_QUERIES_SETTING);
 const TIMEOUT_SETTING = new Setting('timeout', RUNNING_QUERIES_SETTING);
 const MEMORY_SETTING = new Setting('memory', RUNNING_QUERIES_SETTING);
 const DEBUG_SETTING = new Setting('debug', RUNNING_QUERIES_SETTING);
+const MAX_PATHS = new Setting('maxPaths', RUNNING_QUERIES_SETTING);
 const RUNNING_TESTS_SETTING = new Setting('runningTests', ROOT_SETTING);
 const RESULTS_DISPLAY_SETTING = new Setting('resultsDisplay', ROOT_SETTING);
 
@@ -112,12 +113,13 @@ export interface QueryHistoryConfig {
   onDidChangeConfiguration: Event<void>;
 }
 
-const CLI_SETTINGS = [ADDITIONAL_TEST_ARGUMENTS_SETTING, NUMBER_OF_TEST_THREADS_SETTING, NUMBER_OF_THREADS_SETTING];
+const CLI_SETTINGS = [ADDITIONAL_TEST_ARGUMENTS_SETTING, NUMBER_OF_TEST_THREADS_SETTING, NUMBER_OF_THREADS_SETTING, MAX_PATHS];
 
 export interface CliConfig {
   additionalTestArguments: string[];
   numberTestThreads: number;
   numberThreads: number;
+  maxPaths: number;
   onDidChangeConfiguration?: Event<void>;
 }
 
@@ -264,6 +266,10 @@ export class CliConfigListener extends ConfigListener implements CliConfig {
     return NUMBER_OF_THREADS_SETTING.getValue<number>();
   }
 
+  public get maxPaths(): number {
+    return MAX_PATHS.getValue<number>();
+  }
+
   protected handleDidChangeConfiguration(e: ConfigurationChangeEvent): void {
     this.handleDidChangeConfigurationForRelevantSettings(CLI_SETTINGS, e);
   }