test

action.yml

@@ -18,6 +18,10 @@ inputs:
     description: The name of the repository
     default: ${{ github.event.repository.name }}
     required: false
+  codeql:
+    description: Filter the languages to only those that are supported by CodeQL
+    default: 'false'
+    required: false
 
 outputs:
   languages:

src/run.ts

@@ -5,24 +5,43 @@ interface Input {
   token: string;
   owner: string;
   repo: string;
+  codeql: boolean;
 }
 
 export function getInputs(): Input {
   const result = {} as Input;
   result.token = core.getInput('github-token');
   result.owner = core.getInput('owner');
   result.repo = core.getInput('repo');
+  result.codeql = core.getBooleanInput('codeql');
   return result;
 }
 
+const codeqlLanguageMapping = {
+	"csharp": "csharp",
+	"c#": "csharp",
+	"cpp": "cpp",
+	"c": "cpp",
+	"c++": "cpp",
+	"go": "go",
+	"java": "java",
+	"javascript": "javascript",
+	"typescript": "javascript",
+	"python": "python",
+	"ruby": "ruby"
+}
+
 const run = async (): Promise<void> => {
   try {
     const input = getInputs();
     const octokit: ReturnType<typeof github.getOctokit> = github.getOctokit(input.token);
     const langResponse = await octokit.request(`GET /repos/${input.owner}/${input.repo}/languages`);
     core.debug(JSON.stringify({langResponse}))
-    const keys = Object.keys(langResponse.data);
-    core.setOutput('languages', JSON.stringify(keys));
+    let languages = Object.keys(langResponse.data);
+    if (input.codeql) {
+      languages = languages.filter(l => codeqlLanguageMapping[l]);
+    }
+    core.setOutput('languages', JSON.stringify(languages));
   } catch (error) {
     core.startGroup(error instanceof Error ? error.message : JSON.stringify(error));
     core.info(JSON.stringify(error, null, 2));