Check available languages

src/codeql.ts

@@ -77,6 +77,10 @@ export interface CodeQL {
    * Finalize a database using 'codeql database finalize'.
    */
   finalizeDatabase(databasePath: string, threadsFlag: string): Promise<void>;
+  /**
+   * Run 'codeql resolve languages'.
+   */
+  resolveLanguages(): Promise<ResolveLanguagesOutput>;
   /**
    * Run 'codeql resolve queries'.
    */
@@ -99,6 +103,10 @@ export interface CodeQL {
   ): Promise<string>;
 }
 
+export interface ResolveLanguagesOutput {
+  [language: string]: [string];
+}
+
 export interface ResolveQueriesOutput {
   byLanguage: {
     [language: string]: {
@@ -478,6 +486,7 @@ export function setCodeQL(partialCodeql: Partial<CodeQL>): CodeQL {
       "extractScannedLanguage"
     ),
     finalizeDatabase: resolveFunction(partialCodeql, "finalizeDatabase"),
+    resolveLanguages: resolveFunction(partialCodeql, "resolveLanguages"),
     resolveQueries: resolveFunction(partialCodeql, "resolveQueries"),
     databaseAnalyze: resolveFunction(partialCodeql, "databaseAnalyze"),
   };
@@ -654,6 +663,19 @@ function getCodeQLForCmd(cmd: string): CodeQL {
         errorMatchers
       );
     },
+    async resolveLanguages() {
+      const codeqlArgs = ["resolve", "languages", "--format=json"];
+      let output = "";
+      await new toolrunner.ToolRunner(cmd, codeqlArgs, {
+        listeners: {
+          stdout: (data: Buffer) => {
+            output += data.toString();
+          },
+        },
+      }).exec();
+
+      return JSON.parse(output);
+    },
     async resolveQueries(
       queries: string[],
       extraSearchPath: string | undefined

src/config-utils.test.ts

@@ -926,6 +926,11 @@ test("Invalid format of remote config handled correctly", async (t) => {
 test("No detected languages", async (t) => {
   return await util.withTmpDir(async (tmpDir) => {
     mockListLanguages([]);
+    const codeQL = setCodeQL({
+      async resolveLanguages() {
+        return {};
+      },
+    });
 
     try {
       await configUtils.initConfig(
@@ -936,7 +941,7 @@ test("No detected languages", async (t) => {
         { owner: "github", repo: "example " },
         tmpDir,
         tmpDir,
-        getCachedCodeQL(),
+        codeQL,
         tmpDir,
         gitHubVersion,
         sampleApiDetails,

src/config-utils.ts

@@ -653,6 +653,7 @@ async function getLanguagesInRepo(
  * then throw an error.
  */
 async function getLanguages(
+  codeQL: CodeQL,
   languagesInput: string | undefined,
   repository: RepositoryNwo,
   apiDetails: api.GitHubApiDetails,
@@ -668,6 +669,8 @@ async function getLanguages(
   if (languages.length === 0) {
     // Obtain languages as all languages in the repo that can be analysed
     languages = await getLanguagesInRepo(repository, apiDetails, logger);
+    const availableLanguages = await codeQL.resolveLanguages();
+    languages = languages.filter((value) => value in availableLanguages);
     logger.info(
       `Automatically detected languages: ${JSON.stringify(languages)}`
     );
@@ -754,6 +757,7 @@ export async function getDefaultConfig(
   logger: Logger
 ): Promise<Config> {
   const languages = await getLanguages(
+    codeQL,
     languagesInput,
     repository,
     apiDetails,
@@ -833,6 +837,7 @@ async function loadConfig(
   }
 
   const languages = await getLanguages(
+    codeQL,
     languagesInput,
     repository,
     apiDetails,