From 80dcb7ccdf33e958fc80b56bab2efeeef1133ddc Mon Sep 17 00:00:00 2001
From: "Michael B. Gale" <mbg@github.com>
Date: Thu, 9 Jul 2026 14:31:08 +0100
Subject: [PATCH] Add `RUNNER_ENVIRONMENT` to `ActionsEnvVars`

---
 lib/entry-points.js | 4 ++--
 src/actions-util.ts | 2 +-
 src/autobuild.ts    | 4 ++--
 src/environment.ts  | 1 +
 src/init.test.ts    | 3 ++-
 5 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/lib/entry-points.js b/lib/entry-points.js
index a84f452be..19e45627c 100644
--- a/lib/entry-points.js
+++ b/lib/entry-points.js
@@ -145330,7 +145330,7 @@ var getFileType = async (filePath) => {
   }
 };
 function isSelfHostedRunner(env = getEnv()) {
-  return env.getOptional("RUNNER_ENVIRONMENT") === "self-hosted";
+  return env.getOptional("RUNNER_ENVIRONMENT" /* RUNNER_ENVIRONMENT */) === "self-hosted";
 }
 function isDynamicWorkflow(env = getEnv()) {
   return getWorkflowEventName(env) === "dynamic";
@@ -151679,7 +151679,7 @@ async function setupCppAutobuild(codeql, logger) {
     logger
   );
   if (await features.getValue("cpp_dependency_installation_enabled" /* CppDependencyInstallation */, codeql)) {
-    if (process.env["RUNNER_ENVIRONMENT"] === "self-hosted" && process.env[envVar] !== "true") {
+    if (process.env["RUNNER_ENVIRONMENT" /* RUNNER_ENVIRONMENT */] === "self-hosted" && process.env[envVar] !== "true") {
       logger.info(
         `Disabling ${featureName} as we are on a self-hosted runner.${getWorkflowEventName() !== "dynamic" ? ` To override this, set the ${envVar} environment variable to 'true' in your workflow. See ${"https://docs.github.com/en/actions/learn-github-actions/variables#defining-environment-variables-for-a-single-workflow" /* DEFINE_ENV_VARIABLES */} for more information.` : ""}`
       );
diff --git a/src/actions-util.ts b/src/actions-util.ts
index 9782bfb5e..12af438fb 100644
--- a/src/actions-util.ts
+++ b/src/actions-util.ts
@@ -275,7 +275,7 @@ export const getFileType = async (filePath: string): Promise<string> => {
 };
 
 export function isSelfHostedRunner(env: Env = getEnv()) {
-  return env.getOptional("RUNNER_ENVIRONMENT") === "self-hosted";
+  return env.getOptional(ActionsEnvVars.RUNNER_ENVIRONMENT) === "self-hosted";
 }
 
 /** Determines whether the workflow trigger is `dynamic`. */
diff --git a/src/autobuild.ts b/src/autobuild.ts
index fc4983f4e..7ec6ba987 100644
--- a/src/autobuild.ts
+++ b/src/autobuild.ts
@@ -5,7 +5,7 @@ import { getGitHubVersion } from "./api-client";
 import { CodeQL, getCodeQL } from "./codeql";
 import * as configUtils from "./config-utils";
 import { DocUrl } from "./doc-url";
-import { EnvVar } from "./environment";
+import { ActionsEnvVars, EnvVar } from "./environment";
 import { Feature, featureConfig, initFeatures } from "./feature-flags";
 import { BuiltInLanguage, Language } from "./languages";
 import { Logger } from "./logging";
@@ -126,7 +126,7 @@ export async function setupCppAutobuild(codeql: CodeQL, logger: Logger) {
   if (await features.getValue(Feature.CppDependencyInstallation, codeql)) {
     // disable autoinstall on self-hosted runners unless explicitly requested
     if (
-      process.env["RUNNER_ENVIRONMENT"] === "self-hosted" &&
+      process.env[ActionsEnvVars.RUNNER_ENVIRONMENT] === "self-hosted" &&
       process.env[envVar] !== "true"
     ) {
       logger.info(
diff --git a/src/environment.ts b/src/environment.ts
index 663a6396d..7b007d652 100644
--- a/src/environment.ts
+++ b/src/environment.ts
@@ -181,6 +181,7 @@ export enum ActionsEnvVars {
   GITHUB_SERVER_URL = "GITHUB_SERVER_URL",
   GITHUB_SHA = "GITHUB_SHA",
   GITHUB_WORKFLOW = "GITHUB_WORKFLOW",
+  RUNNER_ENVIRONMENT = "RUNNER_ENVIRONMENT",
   RUNNER_NAME = "RUNNER_NAME",
   RUNNER_OS = "RUNNER_OS",
   RUNNER_TEMP = "RUNNER_TEMP",
diff --git a/src/init.test.ts b/src/init.test.ts
index 88ad0c9b1..1f0d2c701 100644
--- a/src/init.test.ts
+++ b/src/init.test.ts
@@ -8,6 +8,7 @@ import * as sinon from "sinon";
 
 import * as actionsUtil from "./actions-util";
 import { createStubCodeQL } from "./codeql";
+import { ActionsEnvVars } from "./environment";
 import { Feature } from "./feature-flags";
 import {
   checkPacksForOverlayCompatibility,
@@ -84,7 +85,7 @@ for (const { runnerEnv, ErrorConstructor, message } of [
     `cleanupDatabaseClusterDirectory throws a ${ErrorConstructor.name} when cleanup fails on ${runnerEnv} runner`,
     async (t) => {
       await withTmpDir(async (tmpDir: string) => {
-        process.env["RUNNER_ENVIRONMENT"] = runnerEnv;
+        process.env[ActionsEnvVars.RUNNER_ENVIRONMENT] = runnerEnv;
 
         const dbLocation = path.resolve(tmpDir, "dbs");
         fs.mkdirSync(dbLocation, { recursive: true });