Add a fix for python 3.12

python-setup/check_python12.ps1

@@ -0,0 +1,19 @@
+
+#! /usr/bin/pwsh
+
+# If we are running greater than or equal to python 3.12, change py to run version 3.11
+Write-Host "Checking python version"
+if ((py -3 -c "import sys; print(0 if sys.version_info >= (3, 12) else 1)") -eq "0") {
+  Write-Host "Python 3.12+ detected, setting PY_PYTHON3=3.11"
+  # First make sure we have python 3.11 installed
+  py -3.11 -c "import imp"
+  if ($LASTEXITCODE -eq 0) {
+    Write-Host "Python 3.11 detected, using this version instead of 3.12+."
+    Write-Output "PY_PYTHON3=3.11" | Out-File -FilePath $Env:GITHUB_ENV -Encoding utf8 -Append
+  } else {
+    Write-Host "FAILURE: Python 3.12+ is not supported. Please install Python 3.11."
+    exit 1
+  }
+} else {
+  Write-Host "Python 3.12+ not detected, not making any changes."
+}

src/init-action.ts

@@ -17,7 +17,13 @@ import { CodeQL } from "./codeql";
 import * as configUtils from "./config-utils";
 import { EnvVar } from "./environment";
 import { Feature, Features } from "./feature-flags";
-import { initCodeQL, initConfig, installPythonDeps, runInit } from "./init";
+import {
+  checkInstallPython311,
+  initCodeQL,
+  initConfig,
+  installPythonDeps,
+  runInit,
+} from "./init";
 import { Language } from "./languages";
 import { getActionsLogger, Logger } from "./logging";
 import { parseRepositoryNwo } from "./repository";
@@ -277,6 +283,8 @@ async function run() {
       logger,
     );
 
+    await checkInstallPython311(config.languages);
+
     if (
       config.languages.includes(Language.python) &&
       getRequiredInput("setup-python-dependencies") === "true"

src/init.ts

@@ -13,6 +13,7 @@ import {
   FeatureEnablement,
   useCodeScanningConfigInCli,
 } from "./feature-flags";
+import { Language } from "./languages";
 import { Logger } from "./logging";
 import { RepositoryNwo } from "./repository";
 import { ToolsSource } from "./setup-codeql";
@@ -181,6 +182,23 @@ function processError(e: any): Error {
   return e;
 }
 
+/**
+ * If we are running python 3.12+ on windows, we need to switch to python 3.11.
+ * This check happens in a powershell script.
+ */
+export async function checkInstallPython311(languages: Language[]) {
+  if (languages.includes(Language.python) && process.platform === "win32") {
+    const script = path.resolve(
+      __dirname,
+      "../python-setup",
+      "check_python12.ps1",
+    );
+    await new toolrunner.ToolRunner(await safeWhich.safeWhich("powershell"), [
+      script,
+    ]).exec();
+  }
+}
+
 export async function installPythonDeps(codeql: CodeQL, logger: Logger) {
   logger.startGroup("Setup Python dependencies");