From 0681a6bff7f9a0a6cc043c5c724f8e8d57728b0e Mon Sep 17 00:00:00 2001
From: Sam Gross <colesbury@gmail.com>
Date: Fri, 14 Feb 2025 17:26:31 +0000
Subject: [PATCH] Improve error message when trying to use free threaded Python
 versions before 3.13

---
 dist/setup/index.js | 12 ++++++++----
 src/find-python.ts  | 24 +++++++++++++++---------
 2 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/dist/setup/index.js b/dist/setup/index.js
index aada8df6..a1b94a31 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -91073,12 +91073,16 @@ function useCpythonVersion(version, architecture, updateEnvironment, checkLatest
         }
         if (!installDir) {
             const osInfo = yield (0, utils_1.getOSInfo)();
-            throw new Error([
+            const msg = [
                 `The version '${version}' with architecture '${architecture}' was not found for ${osInfo
                     ? `${osInfo.osName} ${osInfo.osVersion}`
-                    : 'this operating system'}.`,
-                `The list of all available versions can be found here: ${installer.MANIFEST_URL}`
-            ].join(os.EOL));
+                    : 'this operating system'}.`
+            ];
+            if (freethreaded) {
+                msg.push(`Free threaded versions are only available for Python 3.13.0 and later.`);
+            }
+            msg.push(`The list of all available versions can be found here: ${installer.MANIFEST_URL}`);
+            throw new Error(msg.join(os.EOL));
         }
         const _binDir = binDir(installDir);
         const binaryExtension = utils_1.IS_WINDOWS ? '.exe' : '';
diff --git a/src/find-python.ts b/src/find-python.ts
index e50ded1f..ddb027cb 100644
--- a/src/find-python.ts
+++ b/src/find-python.ts
@@ -102,16 +102,22 @@ export async function useCpythonVersion(
 
   if (!installDir) {
     const osInfo = await getOSInfo();
-    throw new Error(
-      [
-        `The version '${version}' with architecture '${architecture}' was not found for ${
-          osInfo
-            ? `${osInfo.osName} ${osInfo.osVersion}`
-            : 'this operating system'
-        }.`,
-        `The list of all available versions can be found here: ${installer.MANIFEST_URL}`
-      ].join(os.EOL)
+    const msg = [
+      `The version '${version}' with architecture '${architecture}' was not found for ${
+        osInfo
+          ? `${osInfo.osName} ${osInfo.osVersion}`
+          : 'this operating system'
+      }.`
+    ];
+    if (freethreaded) {
+      msg.push(
+        `Free threaded versions are only available for Python 3.13.0 and later.`
+      );
+    }
+    msg.push(
+      `The list of all available versions can be found here: ${installer.MANIFEST_URL}`
     );
+    throw new Error(msg.join(os.EOL));
   }
 
   const _binDir = binDir(installDir);