From 81043c5691352d3a0eb291982be3d864f089bd5a Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Wed, 22 Jun 2022 13:03:36 +0200
Subject: [PATCH] Add git version to diagnose command, and warn if <2.24,
 closes #10832

---
 src/Composer/Command/DiagnoseCommand.php | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/Composer/Command/DiagnoseCommand.php b/src/Composer/Command/DiagnoseCommand.php
index ce5488291..97ecf1c6b 100644
--- a/src/Composer/Command/DiagnoseCommand.php
+++ b/src/Composer/Command/DiagnoseCommand.php
@@ -21,6 +21,7 @@ use Composer\Repository\PlatformRepository;
 use Composer\Plugin\CommandEvent;
 use Composer\Plugin\PluginEvents;
 use Composer\Util\ConfigValidator;
+use Composer\Util\Git;
 use Composer\Util\IniHelper;
 use Composer\Util\ProcessExecutor;
 use Composer\Util\HttpDownloader;
@@ -225,10 +226,7 @@ EOT
         return true;
     }
 
-    /**
-     * @return string|true
-     */
-    private function checkGit()
+    private function checkGit(): string
     {
         if (!function_exists('proc_open')) {
             return '<comment>proc_open is not available, git cannot be used</comment>';
@@ -239,7 +237,16 @@ EOT
             return '<comment>Your git color.ui setting is set to always, this is known to create issues. Use "git config --global color.ui true" to set it correctly.</comment>';
         }
 
-        return true;
+        $gitVersion = Git::getVersion($this->process);
+        if (version_compare('2.24.0', $gitVersion, '>')) {
+            return '<warning>Your git version ('.$gitVersion.') is too old and possibly will cause issues. Please upgrade to git 2.24 or above</>';
+        }
+
+        if (null === $gitVersion) {
+            return '<comment>No git process found</>';
+        }
+
+        return '<info>OK</> <comment>git version '.$gitVersion.'</>';
     }
 
     /**