Enable language specific baselines via feature flag

lib/codeql.js

@@ -278,6 +278,12 @@ async function getCodeQLForCmd(cmd, checkVersion) {
                 (await util.codeQlVersionAbove(this, exports.CODEQL_VERSION_INIT_WITH_QLCONFIG))) {
                 extraArgs.push(`--qlconfig-file=${qlconfigFile}`);
             }
+            if (await features.getValue(feature_flags_1.Feature.LanguageBaselineConfigEnabled, this)) {
+                extraArgs.push("--calculate-language-specific-baseline");
+            }
+            else if (await util.codeQlVersionAbove(this, feature_flags_1.CODEQL_VERSION_LANGUAGE_BASELINE_CONFIG)) {
+                extraArgs.push("--no-calculate-language-specific-baseline");
+            }
             await runTool(cmd, [
                 "database",
                 "init",

lib/feature-flags.js

@@ -23,7 +23,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.logCodeScanningConfigInCli = exports.useCodeScanningConfigInCli = exports.Features = exports.FEATURE_FLAGS_FILE_NAME = exports.featureConfig = exports.Feature = exports.CODEQL_VERSION_INTRA_LAYER_PARALLELISM = exports.CODEQL_VERSION_ANALYSIS_SUMMARY_V2 = exports.CODEQL_VERSION_BUNDLE_SEMANTICALLY_VERSIONED = void 0;
+exports.logCodeScanningConfigInCli = exports.useCodeScanningConfigInCli = exports.Features = exports.FEATURE_FLAGS_FILE_NAME = exports.featureConfig = exports.Feature = exports.CODEQL_VERSION_LANGUAGE_BASELINE_CONFIG = exports.CODEQL_VERSION_INTRA_LAYER_PARALLELISM = exports.CODEQL_VERSION_ANALYSIS_SUMMARY_V2 = exports.CODEQL_VERSION_BUNDLE_SEMANTICALLY_VERSIONED = void 0;
 const fs = __importStar(require("fs"));
 const path = __importStar(require("path"));
 const semver = __importStar(require("semver"));
@@ -44,6 +44,10 @@ exports.CODEQL_VERSION_ANALYSIS_SUMMARY_V2 = "2.14.0";
  * Versions 2.14.0+ of the CodeQL CLI support intra-layer parallelism (aka fine-grained parallelism) options.
  */
 exports.CODEQL_VERSION_INTRA_LAYER_PARALLELISM = "2.14.0";
+/**
+ * Versions 2.14.2+ of the CodeQL CLI support language-specific baseline configuration.
+ */
+exports.CODEQL_VERSION_LANGUAGE_BASELINE_CONFIG = "2.14.2";
 /**
  * Feature enablement as returned by the GitHub API endpoint.
  *
@@ -58,6 +62,7 @@ var Feature;
     Feature["DisablePythonDependencyInstallationEnabled"] = "disable_python_dependency_installation_enabled";
     Feature["EvaluatorIntraLayerParallelismEnabled"] = "evaluator_intra_layer_parallelism_enabled";
     Feature["ExportDiagnosticsEnabled"] = "export_diagnostics_enabled";
+    Feature["LanguageBaselineConfigEnabled"] = "language_baseline_config_enabled";
     Feature["MlPoweredQueriesEnabled"] = "ml_powered_queries_enabled";
     Feature["QaTelemetryEnabled"] = "qa_telemetry_enabled";
     Feature["ScalingReservedRamEnabled"] = "scaling_reserved_ram_enabled";
@@ -94,6 +99,11 @@ exports.featureConfig = {
         minimumVersion: "2.12.4",
         defaultValue: true,
     },
+    [Feature.LanguageBaselineConfigEnabled]: {
+        envVar: "CODEQL_ACTION_LANGUAGE_BASELINE_CONFIG",
+        minimumVersion: exports.CODEQL_VERSION_LANGUAGE_BASELINE_CONFIG,
+        defaultValue: false,
+    },
     [Feature.MlPoweredQueriesEnabled]: {
         envVar: "CODEQL_ML_POWERED_QUERIES",
         minimumVersion: undefined,

src/codeql.ts

@@ -16,6 +16,7 @@ import {
   Feature,
   FeatureEnablement,
   useCodeScanningConfigInCli,
+  CODEQL_VERSION_LANGUAGE_BASELINE_CONFIG,
 } from "./feature-flags";
 import { isTracedLanguage, Language } from "./languages";
 import { Logger } from "./logging";
@@ -574,6 +575,20 @@ export async function getCodeQLForCmd(
       ) {
         extraArgs.push(`--qlconfig-file=${qlconfigFile}`);
       }
+
+      if (
+        await features.getValue(Feature.LanguageBaselineConfigEnabled, this)
+      ) {
+        extraArgs.push("--calculate-language-specific-baseline");
+      } else if (
+        await util.codeQlVersionAbove(
+          this,
+          CODEQL_VERSION_LANGUAGE_BASELINE_CONFIG,
+        )
+      ) {
+        extraArgs.push("--no-calculate-language-specific-baseline");
+      }
+
       await runTool(
         cmd,
         [

src/feature-flags.ts

@@ -28,6 +28,11 @@ export const CODEQL_VERSION_ANALYSIS_SUMMARY_V2 = "2.14.0";
  */
 export const CODEQL_VERSION_INTRA_LAYER_PARALLELISM = "2.14.0";
 
+/**
+ * Versions 2.14.2+ of the CodeQL CLI support language-specific baseline configuration.
+ */
+export const CODEQL_VERSION_LANGUAGE_BASELINE_CONFIG = "2.14.2";
+
 export interface CodeQLDefaultVersionInfo {
   cliVersion: string;
   tagName: string;
@@ -55,6 +60,7 @@ export enum Feature {
   DisablePythonDependencyInstallationEnabled = "disable_python_dependency_installation_enabled",
   EvaluatorIntraLayerParallelismEnabled = "evaluator_intra_layer_parallelism_enabled",
   ExportDiagnosticsEnabled = "export_diagnostics_enabled",
+  LanguageBaselineConfigEnabled = "language_baseline_config_enabled",
   MlPoweredQueriesEnabled = "ml_powered_queries_enabled",
   QaTelemetryEnabled = "qa_telemetry_enabled",
   ScalingReservedRamEnabled = "scaling_reserved_ram_enabled",
@@ -95,6 +101,11 @@ export const featureConfig: Record<
     minimumVersion: "2.12.4",
     defaultValue: true,
   },
+  [Feature.LanguageBaselineConfigEnabled]: {
+    envVar: "CODEQL_ACTION_LANGUAGE_BASELINE_CONFIG",
+    minimumVersion: CODEQL_VERSION_LANGUAGE_BASELINE_CONFIG,
+    defaultValue: false,
+  },
   [Feature.MlPoweredQueriesEnabled]: {
     envVar: "CODEQL_ML_POWERED_QUERIES",
     minimumVersion: undefined,