Throw a ConfigurationError if setup-codeql has run before init

mbg · Oct 17, 2025 · Oct 12, 2025 · Oct 12, 2025 · Oct 16, 2025 · Oct 16, 2025
commit c0e8887d5a9cec04772d252b454d925dbdc4184f
@@ -47,6 +47,9 @@ export enum EnvVar {
   /** Whether the CodeQL Action has already warned the user about low disk space. */
   HAS_WARNED_ABOUT_DISK_SPACE = "CODEQL_ACTION_HAS_WARNED_ABOUT_DISK_SPACE",
 
+  /** Whether the `setup-codeql` action has been run. */
+  SETUP_CODEQL_ACTION_HAS_RUN = "CODEQL_ACTION_SETUP_CODEQL_HAS_RUN",
+
   /** Whether the init action has been run. */
   INIT_ACTION_HAS_RUN = "CODEQL_ACTION_INIT_HAS_RUN",
 

@@ -201,6 +201,7 @@ async function run() {
     ? await loadPropertiesFromApi(gitHubVersion, logger, repositoryNwo)
     : {};
 
+  // Create a unique identifier for this run.
   const jobRunUuid = uuidV4();
   logger.info(`Job run UUID is ${jobRunUuid}.`);
   core.exportVariable(EnvVar.JOB_RUN_UUID, jobRunUuid);
@@ -229,6 +230,14 @@ async function run() {
     if (statusReportBase !== undefined) {
       await sendStatusReport(statusReportBase);
     }
+
+    // Throw a `ConfigurationError` if the `setup-codeql` action has been run.
+    if (process.env[EnvVar.SETUP_CODEQL_ACTION_HAS_RUN] === "true") {
+      throw new ConfigurationError(
+        `The 'init' action should not be run in the same workflow as 'setup-codeql'.`,
+      );
+    }
+
     const codeQLDefaultVersionInfo = await features.getDefaultCliVersion(
       gitHubVersion.type,
     );

@@ -152,6 +152,8 @@ async function run(): Promise<void> {
 
     core.setOutput("codeql-path", codeql.getPath());
     core.setOutput("codeql-version", (await codeql.getVersion()).version);
+
+    core.exportVariable(EnvVar.SETUP_CODEQL_ACTION_HAS_RUN, "true");
   } catch (unwrappedError) {
     const error = wrapError(unwrappedError);
     core.setFailed(error.message);