@@ -10,16 +10,21 @@ import { CachingKind, getCachingKind } from "./caching-utils";
1010import { CodeQL } from "./codeql" ;
1111import { shouldPerformDiffInformedAnalysis } from "./diff-informed-analysis-utils" ;
1212import { Feature , FeatureEnablement } from "./feature-flags" ;
13+ import { getGitRoot } from "./git-utils" ;
1314import { Language , parseLanguage } from "./languages" ;
1415import { Logger } from "./logging" ;
15- import { OverlayDatabaseMode } from "./overlay-database-utils" ;
16+ import {
17+ CODEQL_OVERLAY_MINIMUM_VERSION ,
18+ OverlayDatabaseMode ,
19+ } from "./overlay-database-utils" ;
1620import { RepositoryNwo } from "./repository" ;
1721import { downloadTrapCaches } from "./trap-caching" ;
1822import {
1923GitHubVersion ,
2024prettyPrintPack ,
2125ConfigurationError ,
2226BuildMode ,
27+ codeQlVersionAtLeast ,
2328} from "./util" ;
2429
2530// Property names from the user-supplied config file.
@@ -744,6 +749,38 @@ async function getOverlayDatabaseMode(
744749buildMode :BuildMode | undefined ,
745750logger :Logger ,
746751) :Promise < OverlayDatabaseMode > {
752+ const overlayDatabaseMode = process . env . CODEQL_OVERLAY_DATABASE_MODE ;
753+
754+ if (
755+ overlayDatabaseMode === OverlayDatabaseMode . Overlay ||
756+ overlayDatabaseMode === OverlayDatabaseMode . OverlayBase
757+ ) {
758+ if ( buildMode !== BuildMode . None ) {
759+ logger . warning (
760+ `Cannot build an${ overlayDatabaseMode } +
761+ `build-mode is set to "${ buildMode } +
762+ "Falling back to creating a normal full database instead." ,
763+ ) ;
764+ return OverlayDatabaseMode . None ;
765+ }
766+ if ( ! ( await codeQlVersionAtLeast ( codeql , CODEQL_OVERLAY_MINIMUM_VERSION ) ) ) {
767+ logger . warning (
768+ `Cannot build an${ overlayDatabaseMode } +
769+ `the CodeQL CLI is older than${ CODEQL_OVERLAY_MINIMUM_VERSION } +
770+ "Falling back to creating a normal full database instead." ,
771+ ) ;
772+ return OverlayDatabaseMode . None ;
773+ }
774+ if ( ( await getGitRoot ( sourceRoot ) ) === undefined ) {
775+ logger . warning (
776+ `Cannot build an${ overlayDatabaseMode } +
777+ `the source root "${ sourceRoot } +
778+ "Falling back to creating a normal full database instead." ,
779+ ) ;
780+ return OverlayDatabaseMode . None ;
781+ }
782+ return overlayDatabaseMode as OverlayDatabaseMode ;
783+ }
747784return OverlayDatabaseMode . None ;
748785}
749786