squash! Configure environment to avoid toolchain installs

Only modify env if `GOTOOLCHAIN` is not set

dist/setup/index.js

@@ -94312,6 +94312,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
+exports.GOTOOLCHAIN_LOCAL_VAL = exports.GOTOOLCHAIN_ENV_VAR = void 0;
 exports.getGo = getGo;
 exports.extractGoArchive = extractGoArchive;
 exports.getManifest = getManifest;
@@ -94330,6 +94331,8 @@ const sys = __importStar(__nccwpck_require__(5632));
 const fs_1 = __importDefault(__nccwpck_require__(7147));
 const os_1 = __importDefault(__nccwpck_require__(2037));
 const utils_1 = __nccwpck_require__(1314);
+exports.GOTOOLCHAIN_ENV_VAR = 'GOTOOLCHAIN';
+exports.GOTOOLCHAIN_LOCAL_VAL = 'local';
 const MANIFEST_REPO_OWNER = 'actions';
 const MANIFEST_REPO_NAME = 'go-versions';
 const MANIFEST_REPO_BRANCH = 'main';
@@ -94783,12 +94786,12 @@ const os_1 = __importDefault(__nccwpck_require__(2037));
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
-            setToolchain();
             //
             // versionSpec is optional.  If supplied, install / use from the tool cache
             // If not supplied then problem matchers will still be setup.  Useful for self-hosted.
             //
             const versionSpec = resolveVersionInput();
+            setGoToolchain();
             const cache = core.getBooleanInput('cache');
             core.info(`Setup go version spec ${versionSpec}`);
             let arch = core.getInput('architecture');
@@ -94897,20 +94900,18 @@ function resolveVersionInput() {
     }
     return version;
 }
-function setToolchain() {
+function setGoToolchain() {
     // docs: https://go.dev/doc/toolchain
     // "local indicates the bundled Go toolchain (the one that shipped with the go command being run)"
     // this is so any 'go' command is run with the selected Go version
     // and doesn't trigger a toolchain download and run commands with that
     // see e.g. issue #424
-    // and a similar discussion: https://github.com/docker-library/golang/issues/472
-    const toolchain = 'local';
-    const toolchainVar = 'GOTOOLCHAIN';
-    // set the value in process env so any `go` commands run as child-process
+    // and a similar discussion: https://github.com/docker-library/golang/issues/472.
+    // Set the value in process env so any `go` commands run as child-process
     // don't cause toolchain downloads
-    process.env[toolchainVar] = toolchain;
+    process.env[installer.GOTOOLCHAIN_ENV_VAR] = installer.GOTOOLCHAIN_LOCAL_VAL;
     // and in the runner env so e.g. a user running `go mod tidy` won't cause it
-    core.exportVariable(toolchainVar, toolchain);
+    core.exportVariable(installer.GOTOOLCHAIN_ENV_VAR, installer.GOTOOLCHAIN_LOCAL_VAL);
 }
 
 

src/installer.ts

@@ -8,6 +8,8 @@ import fs from 'fs';
 import os from 'os';
 import {StableReleaseAlias, isSelfHosted} from './utils';
 
+export const GOTOOLCHAIN_ENV_VAR = 'GOTOOLCHAIN';
+export const GOTOOLCHAIN_LOCAL_VAL = 'local';
 const MANIFEST_REPO_OWNER = 'actions';
 const MANIFEST_REPO_NAME = 'go-versions';
 const MANIFEST_REPO_BRANCH = 'main';

src/main.ts

@@ -11,12 +11,12 @@ import os from 'os';
 
 export async function run() {
   try {
-    setToolchain();
     //
     // versionSpec is optional.  If supplied, install / use from the tool cache
     // If not supplied then problem matchers will still be setup.  Useful for self-hosted.
     //
     const versionSpec = resolveVersionInput();
+    setGoToolchain();
 
     const cache = core.getBooleanInput('cache');
     core.info(`Setup go version spec ${versionSpec}`);
@@ -162,19 +162,19 @@ function resolveVersionInput(): string {
   return version;
 }
 
-function setToolchain() {
+function setGoToolchain() {
   // docs: https://go.dev/doc/toolchain
   // "local indicates the bundled Go toolchain (the one that shipped with the go command being run)"
   // this is so any 'go' command is run with the selected Go version
   // and doesn't trigger a toolchain download and run commands with that
   // see e.g. issue #424
-  // and a similar discussion: https://github.com/docker-library/golang/issues/472
-  const toolchain = 'local';
-  const toolchainVar = 'GOTOOLCHAIN';
-
-  // set the value in process env so any `go` commands run as child-process
+  // and a similar discussion: https://github.com/docker-library/golang/issues/472.
+  // Set the value in process env so any `go` commands run as child-process
   // don't cause toolchain downloads
-  process.env[toolchainVar] = toolchain;
+  process.env[installer.GOTOOLCHAIN_ENV_VAR] = installer.GOTOOLCHAIN_LOCAL_VAL;
   // and in the runner env so e.g. a user running `go mod tidy` won't cause it
-  core.exportVariable(toolchainVar, toolchain);
+  core.exportVariable(
+    installer.GOTOOLCHAIN_ENV_VAR,
+    installer.GOTOOLCHAIN_LOCAL_VAL
+  );
 }