Update README for semantic versioning

Use golang-dl release data

README.md

@@ -16,7 +16,7 @@ See [action.yml](action.yml)
 Basic:
 ```yaml
 steps:
-- uses: actions/checkout@master
+- uses: actions/checkout@v1
 - uses: actions/setup-go@v1
   with:
     go-version: '1.9.3' # The Go version to download (if necessary) and use.
@@ -33,7 +33,7 @@ jobs:
         go: [ '1.8', '1.9.3', '1.10.x' ]
     name: Go ${{ matrix.go }} sample
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v1
       - name: Setup go
         uses: actions/setup-go@v1
         with:

__tests__/installer.test.ts

@@ -43,9 +43,10 @@ describe('installer tests', () => {
 
   describe('the latest release of a go version', () => {
     beforeEach(() => {
-      nock('https://api.github.com')
-        .get('/repos/golang/go/git/refs/tags')
-        .replyWithFile(200, path.join(dataDir, 'golang-tags.json'));
+      nock('https://golang.org')
+        .get('/dl/')
+        .query({mode: 'json', include: 'all'})
+        .replyWithFile(200, path.join(dataDir, 'golang-dl.json'));
     });
 
     afterEach(() => {
@@ -79,7 +80,7 @@ describe('installer tests', () => {
 
     it('Acquires latest release version of go if using 1.x and no matching version is installed', async () => {
       await installer.getGo('1.x');
-      const goDir = path.join(toolDir, 'go', '1.13.0-beta1', os.arch());
+      const goDir = path.join(toolDir, 'go', '1.13.0', os.arch());
 
       expect(fs.existsSync(`${goDir}.complete`)).toBe(true);
       if (IS_WINDOWS) {

action.yml

@@ -1,5 +1,5 @@
-name: 'Setup Go environment'
-description: 'Setup a Go environment and add it to the PATH, additionally providing proxy support'
+name: 'Setup Go'
+description: 'Set up a specific version of Go and add the command-line tools to the PATH'
 author: 'GitHub'
 inputs: 
   go-version:

lib/installer.js

@@ -186,10 +186,9 @@ function getLatestVersion(version) {
 function getAvailableVersions() {
     return __awaiter(this, void 0, void 0, function* () {
         let rest = new restm.RestClient('setup-go');
-        let tags = (yield rest.get('https://api.github.com/repos/golang/go/git/refs/tags')).result || [];
-        return tags
-            .filter(tag => tag.ref.match(/go\d+\.[\w\.]+/g))
-            .map(tag => tag.ref.replace('refs/tags/go', ''));
+        let tags = (yield rest.get('https://golang.org/dl/?mode=json&include=all'))
+            .result || [];
+        return tags.map(tag => tag.version.replace('go', ''));
     });
 }
 function getPossibleVersions(version) {

src/installer.ts

@@ -187,19 +187,16 @@ async function getLatestVersion(version: string): Promise<string> {
 }
 
 interface IGoRef {
-  ref: string;
+  version: string;
 }
 
 async function getAvailableVersions(): Promise<string[]> {
   let rest: restm.RestClient = new restm.RestClient('setup-go');
   let tags: IGoRef[] =
-    (await rest.get<IGoRef[]>(
-      'https://api.github.com/repos/golang/go/git/refs/tags'
-    )).result || [];
+    (await rest.get<IGoRef[]>('https://golang.org/dl/?mode=json&include=all'))
+      .result || [];
 
-  return tags
-    .filter(tag => tag.ref.match(/go\d+\.[\w\.]+/g))
-    .map(tag => tag.ref.replace('refs/tags/go', ''));
+  return tags.map(tag => tag.version.replace('go', ''));
 }
 
 async function getPossibleVersions(version: string): Promise<string[]> {