Update workflow path for default setup

In default setup, the workflow is not checked into the repository.
Instead it exists at a fixed path.

Author: henrymercer

lib/actions-util.js

@@ -16,6 +16,7 @@ import {
   getCodeQLDatabasePath,
   getRequiredEnvParam,
   GITHUB_DOTCOM_URL,
+  isDefaultSetup,
   isHTTPError,
   isInTestMode,
   parseMatrixInput,
@@ -573,8 +574,8 @@ export async function sendStatusReport<S extends StatusReportBase>(
 }
 
 export function workflowEventName() {
-  // If the original event is dynamic CODESCANNING_EVENT_NAME will contain the right info (push/pull_request)
-  if (process.env["GITHUB_EVENT_NAME"] === "dynamic") {
+  // For default setup, `CODESCANNING_EVENT_NAME` will contain the right info (push/pull_request).
+  if (isDefaultSetup()) {
     const value = process.env["CODESCANNING_EVENT_NAME"];
     if (value === undefined || value.length === 0) {
       return process.env["GITHUB_EVENT_NAME"];

lib/actions-util.js.map

@@ -888,3 +888,7 @@ export function fixInvalidNotificationsInFile(
   sarif = fixInvalidNotifications(sarif, logger);
   fs.writeFileSync(outputPath, JSON.stringify(sarif));
 }
+
+export function isDefaultSetup(): boolean {
+  return process.env["GITHUB_EVENT_NAME"] === "dynamic";
+}

lib/util.js

@@ -5,7 +5,7 @@ import * as core from "@actions/core";
 import * as yaml from "js-yaml";
 
 import * as api from "./api-client";
-import { getRequiredEnvParam } from "./util";
+import { getRequiredEnvParam, isDefaultSetup } from "./util";
 
 export interface WorkflowJobStep {
   name?: string;
@@ -276,6 +276,12 @@ export async function getWorkflow(): Promise<Workflow> {
  * Get the path of the currently executing workflow.
  */
 export async function getWorkflowPath(): Promise<string> {
+  if (isDefaultSetup()) {
+    // In default setup, the workflow file is not checked into the repository. Instead it exists at
+    // this fixed path.
+    return "dynamic/github-code-scanning/codeql";
+  }
+
   const repo_nwo = getRequiredEnvParam("GITHUB_REPOSITORY").split("/");
   const owner = repo_nwo[0];
   const repo = repo_nwo[1];