Add stable and oldstable aliases

.github/workflows/versions.yml

@@ -12,6 +12,38 @@ on:
     - cron: 0 0 * * *
 
 jobs:
+  stable:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup Go and check latest
+        uses: ./
+        with:
+          go-version: stable
+          architecture: x64
+      - name: Verify Go
+        run: go version
+
+  oldstable:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup Go and check latest
+        uses: ./
+        with:
+          go-version: oldstable
+          architecture: x64
+      - name: Verify Go
+        run: go version
+
   local-cache:
     name: Setup local-cache version
     runs-on: ${{ matrix.os }}

.gitignore

@@ -89,3 +89,7 @@ typings/
 
 # DynamoDB Local files
 .dynamodb/
+
+.vscode
+
+release.txt

src/installer.ts

@@ -114,7 +114,7 @@ export async function getGo(
   return downloadPath;
 }
 
-async function resolveVersionFromManifest(
+export async function resolveVersionFromManifest(
   versionSpec: string,
   stable: boolean,
   auth: string | undefined,
@@ -188,7 +188,14 @@ export async function getInfoFromManifest(
     'main'
   );
   core.info(`matching ${versionSpec}...`);
-  const rel = await tc.findFromManifest(versionSpec, stable, releases, arch);
+
+  let rel: tc.IToolRelease | undefined;
+
+  if (versionSpec === 'stable') {
+    rel = releases[0];
+  } else {
+    rel = await tc.findFromManifest(versionSpec, stable, releases, arch);
+  }
 
   if (rel && rel.files.length > 0) {
     info = <IGoVersionInfo>{};

src/main.ts

@@ -15,7 +15,7 @@ export async function run() {
     // 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();
+    let versionSpec = resolveVersionInput();
 
     const cache = core.getBooleanInput('cache');
     core.info(`Setup go version spec ${versionSpec}`);
@@ -31,6 +31,11 @@ export async function run() {
       let auth = !token ? undefined : `token ${token}`;
 
       const checkLatest = core.getBooleanInput('check-latest');
+
+      if (versionSpec === 'stable' || versionSpec === 'oldstable') {
+        versionSpec = await resolveStableVersionInput(versionSpec, auth, arch);
+      }
+
       const installDir = await installer.getGo(
         versionSpec,
         checkLatest,
@@ -143,3 +148,37 @@ function resolveVersionInput(): string {
 
   return version;
 }
+
+async function resolveStableVersionInput(
+  versionSpec: string,
+  auth: string | undefined,
+  arch = os.arch()
+): Promise<string> {
+  let resolvedVersion = await installer.resolveVersionFromManifest(
+    'stable',
+    true,
+    auth,
+    arch
+  );
+
+  core.info(`Stable version resolved as ${resolvedVersion}`);
+
+  if (versionSpec === 'oldstable') {
+    if (resolvedVersion) {
+      const minorVersion = semver.minor(resolvedVersion);
+      const semverExpression = `<${semver.major(
+        resolvedVersion
+      )}.${minorVersion}.0`;
+      resolvedVersion = await installer.resolveVersionFromManifest(
+        semverExpression,
+        true,
+        auth,
+        arch
+      );
+
+      core.info(`Oldstable version resolved as ${resolvedVersion}`);
+    }
+  }
+
+  return resolvedVersion ? resolvedVersion : versionSpec;
+}