Clarify node function name to GetInternalNodeVersion and use better ENV var name

src/Runner.Common/Constants.cs

@@ -225,8 +225,8 @@ public static class Agent
             {
                 public static readonly string ToolsDirectory = "agent.ToolsDirectory";
 
-                // Set this env var to force a node version for internal functions (e.g hashfiles). This does NOT affect the version of node actions.
-                public static readonly string ForcedNodeVersion = "GITHUB_ACTIONS_RUNNER_FORCED_NODE_VERSION"; 
+                // Set this env var to "node12" to downgrade the node version for internal functions (e.g hashfiles). This does NOT affect the version of node actions.
+                public static readonly string ForcedInternalNodeVersion = "ACTIONS_RUNNER_FORCED_INTERNAL_NODE_VERSION"; 
             }
 
             public static class System

src/Runner.Common/Util/NodeUtil.cs

@@ -7,9 +7,9 @@ public static class NodeUtil
     {
         private const string _defaultNodeVersion = "node16";
         public static readonly ReadOnlyCollection<string> BuiltInNodeVersions = new(new[] {"node12", "node16"});
-        public static string GetNodeVersion()
+        public static string GetInternalNodeVersion()
         {
-            var forcedNodeVersion = Environment.GetEnvironmentVariable(Constants.Variables.Agent.ForcedNodeVersion);
+            var forcedNodeVersion = Environment.GetEnvironmentVariable(Constants.Variables.Agent.ForcedInternalNodeVersion);
             return !string.IsNullOrEmpty(forcedNodeVersion) && BuiltInNodeVersions.Contains(forcedNodeVersion) ? forcedNodeVersion : _defaultNodeVersion;
         }
     }

src/Runner.Listener/Checks/CheckUtil.cs

@@ -315,7 +315,7 @@ public static async Task<CheckResult> DownloadExtraCA(this IHostContext hostCont
                     });
 
                     var downloadCertScript = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Bin), "checkScripts", "downloadCert");
-                    var node = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Externals), NodeUtil.GetNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
+                    var node = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Externals), NodeUtil.GetInternalNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
                     result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Run '{node} \"{downloadCertScript}\"' ");
                     result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {StringUtil.ConvertToJson(env)}");
                     await processInvoker.ExecuteAsync(

src/Runner.Listener/Checks/NodeJsCheck.cs

@@ -145,7 +145,7 @@ private async Task<CheckResult> CheckNodeJs(string url, string pat, bool extraCA
                     });
 
                     var makeWebRequestScript = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Bin), "checkScripts", "makeWebRequest.js");
-                    var node = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), NodeUtil.GetNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
+                    var node = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), NodeUtil.GetInternalNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
                     result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Run '{node} \"{makeWebRequestScript}\"' ");
                     result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {StringUtil.ConvertToJson(env)}");
                     await processInvoker.ExecuteAsync(

src/Runner.Listener/SelfUpdater.cs

@@ -1070,7 +1070,7 @@ private async Task<string> HashFiles(string fileFolder, CancellationToken token)
 
             var stopWatch = Stopwatch.StartNew();
             string binDir = HostContext.GetDirectory(WellKnownDirectory.Bin);
-            string node = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), NodeUtil.GetNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
+            string node = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), NodeUtil.GetInternalNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
             string hashFilesScript = Path.Combine(binDir, "hashFiles");
             var hashResult = string.Empty;
 

src/Runner.Worker/ExecutionContext.cs

@@ -670,7 +670,7 @@ public void InitializeJob(Pipelines.AgentJobRequestMessage message, Cancellation
 
             if (Global.Variables.GetBoolean("DistributedTask.ForceInternalNodeVersionOnRunnerTo12") ?? false)
             {
-                Environment.SetEnvironmentVariable(Constants.Variables.Agent.ForcedNodeVersion, "node12");
+                Environment.SetEnvironmentVariable(Constants.Variables.Agent.ForcedInternalNodeVersion, "node12");
             }
 
             // Environment variables shared across all actions

src/Runner.Worker/Expressions/HashFilesFunction.cs

@@ -63,7 +63,7 @@ protected sealed override Object EvaluateCore(
             string binDir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
             string runnerRoot = new DirectoryInfo(binDir).Parent.FullName;
 
-            string node = Path.Combine(runnerRoot, "externals", NodeUtil.GetNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
+            string node = Path.Combine(runnerRoot, "externals", NodeUtil.GetInternalNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
             string hashFilesScript = Path.Combine(binDir, "hashFiles");
             var hashResult = string.Empty;
             var p = new ProcessInvoker(new HashFilesTrace(context.Trace));

src/Runner.Worker/Handlers/NodeScriptActionHandler.cs

@@ -6,7 +6,6 @@
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
-using Pipelines = GitHub.DistributedTask.Pipelines;
 
 namespace GitHub.Runner.Worker.Handlers
 {

src/Runner.Worker/Handlers/ScriptHandler.cs

@@ -268,7 +268,7 @@ public async Task RunAsync(ActionRunStage stage)
             if (Environment.ContainsKey("DYLD_INSERT_LIBRARIES"))  // We don't check `isContainerStepHost` because we don't support container on macOS
             {
                 // launch `node macOSRunInvoker.js shell args` instead of `shell args` to avoid macOS SIP remove `DYLD_INSERT_LIBRARIES` when launch process
-                string node = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), NodeUtil.GetNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
+                string node = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), NodeUtil.GetInternalNodeVersion(), "bin", $"node{IOUtil.ExeExtension}");
                 string macOSRunInvoker = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Bin), "macos-run-invoker.js");
                 arguments = $"\"{macOSRunInvoker.Replace("\"", "\\\"")}\" \"{fileName.Replace("\"", "\\\"")}\" {arguments}";
                 fileName = node;