From 7c2bf7263df554e3ebc2ee8ac2d18c8053a80ab4 Mon Sep 17 00:00:00 2001
From: Benoit Daloze <eregontp@gmail.com>
Date: Wed, 18 Nov 2020 21:47:45 +0100
Subject: [PATCH] Ensure an engine-only ruby-version picks the latest stable
 version and not a preview or RC

---
 common.js     | 4 ++++
 dist/index.js | 7 ++++++-
 index.js      | 2 +-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/common.js b/common.js
index 4587abc..f11ba12 100644
--- a/common.js
+++ b/common.js
@@ -28,6 +28,10 @@ export function isHeadVersion(rubyVersion) {
   return rubyVersion === 'head' || rubyVersion === 'debug' || rubyVersion === 'mingw' || rubyVersion === 'mswin'
 }
 
+export function isStableVersion(rubyVersion) {
+  return /^\d+(\.\d+)*$/.test(rubyVersion)
+}
+
 export async function hashFile(file) {
   // See https://github.com/actions/runner/blob/master/src/Misc/expressionFunc/hashFiles/src/hashFiles.ts
   const hash = crypto.createHash('sha256')
diff --git a/dist/index.js b/dist/index.js
index 23dc791..44a4c39 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -32096,6 +32096,7 @@ __webpack_require__.r(__webpack_exports__);
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "drive", function() { return drive; });
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "measure", function() { return measure; });
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "isHeadVersion", function() { return isHeadVersion; });
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "isStableVersion", function() { return isStableVersion; });
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "hashFile", function() { return hashFile; });
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "getVirtualEnvironmentName", function() { return getVirtualEnvironmentName; });
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "shouldExtractInToolCache", function() { return shouldExtractInToolCache; });
@@ -32132,6 +32133,10 @@ function isHeadVersion(rubyVersion) {
   return rubyVersion === 'head' || rubyVersion === 'debug' || rubyVersion === 'mingw' || rubyVersion === 'mswin'
 }
 
+function isStableVersion(rubyVersion) {
+  return /^\d+(\.\d+)*$/.test(rubyVersion)
+}
+
 async function hashFile(file) {
   // See https://github.com/actions/runner/blob/master/src/Misc/expressionFunc/hashFiles/src/hashFiles.ts
   const hash = crypto.createHash('sha256')
@@ -51290,7 +51295,7 @@ function validateRubyEngineAndVersion(platform, engineVersions, engine, parsedVe
   let version = parsedVersion
   if (!engineVersions.includes(parsedVersion)) {
     const latestToFirstVersion = engineVersions.slice().reverse()
-    const found = latestToFirstVersion.find(v => !common.isHeadVersion(v) && v.startsWith(parsedVersion))
+    const found = latestToFirstVersion.find(v => common.isStableVersion(v) && v.startsWith(parsedVersion))
     if (found) {
       version = found
     } else {
diff --git a/index.js b/index.js
index 3e8c940..0b9bbf9 100644
--- a/index.js
+++ b/index.js
@@ -132,7 +132,7 @@ function validateRubyEngineAndVersion(platform, engineVersions, engine, parsedVe
   let version = parsedVersion
   if (!engineVersions.includes(parsedVersion)) {
     const latestToFirstVersion = engineVersions.slice().reverse()
-    const found = latestToFirstVersion.find(v => !common.isHeadVersion(v) && v.startsWith(parsedVersion))
+    const found = latestToFirstVersion.find(v => common.isStableVersion(v) && v.startsWith(parsedVersion))
     if (found) {
       version = found
     } else {