Add JSON output of go env and some env as strings

Additional outputs are:
- GOPATH as `go-path` string
- GOROOT as `go-root` string
- GOMOD as `go-mod` string
- GOCACHE as `go-cache` string
- GOMODCACHE as `go-mod-cache` string
- `go env` as `go-env` JSON

Author: lucacome

.github/workflows/outputs.yml

@@ -0,0 +1,24 @@
+name: Test outputs
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  setup-go-env:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - id: setup-go
+        uses: ./
+      - run: |
+          echo GOPATH=${{ steps.setup-go.outputs.go-path }}
+          echo GOROOT=${{ steps.setup-go.outputs.go-root }}
+          echo GOMOD=${{ steps.setup-go.outputs.go-mod }}
+          echo GOMODCACHE=${{ steps.setup-go.outputs.go-mod-cache }}
+          echo GOVERSION=${{ steps.setup-go.outputs.go-version }}
+
+          echo Go environment variables json:
+          jq . <<< '${{ steps.setup-go.outputs.go-env }}'

__tests__/setup-go.test.ts

@@ -129,6 +129,29 @@ describe('setup-go', () => {
     expect(main.parseGoVersion(goVersionOutput)).toBe('1.16.6');
   });
 
+  it('can read go env variables', async () => {
+    let goRoot = '/opt/hostedtoolcache/go/1.18.10/x64';
+    let goPath = '/home/runner/go';
+    let goModCache = '/home/runner/go/pkg/mod';
+    let goCache = '/home/runner/.cache/go-build';
+    let goVersion = 'go1.18.10';
+
+    let env = `
+GOROOT="${goRoot}"
+GOPATH="${goPath}"
+GOMODCACHE="${goModCache}"
+GOCACHE="${goCache}"
+GOVERSION="${goVersion}"
+    `;
+    let json = JSON.parse(main.convertEnvStringToJson(env));
+    expect(json).toBeDefined();
+    expect(json['GOROOT']).toBe(goRoot);
+    expect(json['GOPATH']).toBe(goPath);
+    expect(json['GOMODCACHE']).toBe(goModCache);
+    expect(json['GOCACHE']).toBe(goCache);
+    expect(json['GOVERSION']).toBe(goVersion);
+  });
+
   it('can find 1.9.7 from manifest on osx', async () => {
     os.platform = 'darwin';
     os.arch = 'x64';

action.yml

@@ -22,6 +22,16 @@ inputs:
 outputs:
   go-version:
     description: 'The installed Go version. Useful when given a version range as input.'
+  go-path:
+    description: 'The GOPATH environment variable'
+  go-root:
+    description: 'The GOROOT environment variable'
+  go-mod:
+    description: 'The GOMOD environment variable'
+  go-mod-cache:
+    description: 'The GOMODCACHE environment variable'
+  go-env:
+    description: 'The Go environment variables in JSON format'
   cache-hit:
     description: 'A boolean value to indicate if a cache was hit'
 runs:

dist/setup/index.js

@@ -63559,7 +63559,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.parseGoVersion = exports.addBinToPath = exports.run = void 0;
+exports.convertEnvStringToJson = exports.parseGoVersion = exports.addBinToPath = exports.run = void 0;
 const core = __importStar(__nccwpck_require__(2186));
 const io = __importStar(__nccwpck_require__(7436));
 const installer = __importStar(__nccwpck_require__(2574));
@@ -63603,20 +63603,30 @@ function run() {
                 core.info(`Successfully set up Go version ${versionSpec}`);
             }
             let goPath = yield io.which('go');
+            let goEnv = (child_process_1.default.execSync(`${goPath} env`) || '').toString();
+            let goEnvJson = JSON.parse(convertEnvStringToJson(goEnv));
             let goVersion = (child_process_1.default.execSync(`${goPath} version`) || '').toString();
+            let parsedGoVersion = parseGoVersion(goVersion);
+            // Go versions less that 1.16 do not have the GOVERSION environment variable
+            if (semver.lt(parsedGoVersion, '1.16.0')) {
+                goEnvJson['GOVERSION'] = 'go' + parsedGoVersion;
+            }
+            core.info(goVersion);
             if (cache && cache_utils_1.isCacheFeatureAvailable()) {
                 const packageManager = 'default';
                 const cacheDependencyPath = core.getInput('cache-dependency-path');
-                yield cache_restore_1.restoreCache(parseGoVersion(goVersion), packageManager, cacheDependencyPath);
+                yield cache_restore_1.restoreCache(parsedGoVersion, packageManager, cacheDependencyPath);
             }
             // add problem matchers
             const matchersPath = path_1.default.join(__dirname, '../..', 'matchers.json');
             core.info(`##[add-matcher]${matchersPath}`);
-            // output the version actually being used
-            core.info(goVersion);
-            core.setOutput('go-version', parseGoVersion(goVersion));
+            core.setOutput('go-version', parsedGoVersion);
+            core.setOutput('go-path', goEnvJson['GOPATH']);
+            core.setOutput('go-root', goEnvJson['GOROOT']);
+            core.setOutput('go-cache', goEnvJson['GOCACHE']);
+            core.setOutput('go-mod-cache', goEnvJson['GOMODCACHE']);
+            core.setOutput('go-env', goEnvJson);
             core.startGroup('go env');
-            let goEnv = (child_process_1.default.execSync(`${goPath} env`) || '').toString();
             core.info(goEnv);
             core.endGroup();
         }
@@ -63664,6 +63674,16 @@ function parseGoVersion(versionString) {
     return versionString.split(' ')[2].slice('go'.length);
 }
 exports.parseGoVersion = parseGoVersion;
+function convertEnvStringToJson(envString) {
+    const envArray = envString.split('\n');
+    const envObject = {};
+    envArray.forEach(envVar => {
+        const [key, value] = envVar.split(/=(?=")/);
+        envObject[key] = value === null || value === void 0 ? void 0 : value.replace(/"/g, '');
+    });
+    return JSON.stringify(envObject);
+}
+exports.convertEnvStringToJson = convertEnvStringToJson;
 function resolveVersionInput() {
     let version = core.getInput('go-version');
     const versionFilePath = core.getInput('go-version-file');

src/main.ts

@@ -57,29 +57,36 @@ export async function run() {
     }
 
     let goPath = await io.which('go');
+    let goEnv = (cp.execSync(`${goPath} env`) || '').toString();
+    let goEnvJson = JSON.parse(convertEnvStringToJson(goEnv));
     let goVersion = (cp.execSync(`${goPath} version`) || '').toString();
+    let parsedGoVersion = parseGoVersion(goVersion);
+
+    // Go versions less that 1.16 do not have the GOVERSION environment variable
+    if (semver.lt(parsedGoVersion, '1.16.0')) {
+      goEnvJson['GOVERSION'] = 'go' + parsedGoVersion;
+    }
+
+    core.info(goVersion);
 
     if (cache && isCacheFeatureAvailable()) {
       const packageManager = 'default';
       const cacheDependencyPath = core.getInput('cache-dependency-path');
-      await restoreCache(
-        parseGoVersion(goVersion),
-        packageManager,
-        cacheDependencyPath
-      );
+      await restoreCache(parsedGoVersion, packageManager, cacheDependencyPath);
     }
 
     // add problem matchers
     const matchersPath = path.join(__dirname, '../..', 'matchers.json');
     core.info(`##[add-matcher]${matchersPath}`);
 
-    // output the version actually being used
-    core.info(goVersion);
-
-    core.setOutput('go-version', parseGoVersion(goVersion));
+    core.setOutput('go-version', parsedGoVersion);
+    core.setOutput('go-path', goEnvJson['GOPATH']);
+    core.setOutput('go-root', goEnvJson['GOROOT']);
+    core.setOutput('go-cache', goEnvJson['GOCACHE']);
+    core.setOutput('go-mod-cache', goEnvJson['GOMODCACHE']);
+    core.setOutput('go-env', goEnvJson);
 
     core.startGroup('go env');
-    let goEnv = (cp.execSync(`${goPath} env`) || '').toString();
     core.info(goEnv);
     core.endGroup();
   } catch (error) {
@@ -126,6 +133,18 @@ export function parseGoVersion(versionString: string): string {
   return versionString.split(' ')[2].slice('go'.length);
 }
 
+export function convertEnvStringToJson(envString: string): string {
+  const envArray = envString.split('\n');
+  const envObject: {[key: string]: string} = {};
+
+  envArray.forEach(envVar => {
+    const [key, value] = envVar.split(/=(?=")/);
+    envObject[key] = value?.replace(/"/g, '');
+  });
+
+  return JSON.stringify(envObject);
+}
+
 function resolveVersionInput(): string {
   let version = core.getInput('go-version');
   const versionFilePath = core.getInput('go-version-file');