From 82962fe60c83a25dbca73a6f905ba46fdd9738a6 Mon Sep 17 00:00:00 2001
From: Austin Wise <AustinWise@gmail.com>
Date: Fri, 25 Oct 2019 03:15:56 -0700
Subject: [PATCH] Normalize git commondir path.

The constructor for GitRepositoryLocation asserts that this path is
normalized. On my machine, a git worktree created by git 2.22.0 does not
result in path that satisfies this assert.
---
 src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs b/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs
index a06a5bcc..0b3677ea 100644
--- a/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs
+++ b/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs
@@ -491,6 +491,8 @@ private static bool IsGitDirectory(string directory, out string commonDirectory)
                 try
                 {
                     commonDirectory = Path.Combine(directory, File.ReadAllText(commonLinkPath).TrimEnd(CharUtils.AsciiWhitespace));
+                    // noralize relative paths
+                    commonDirectory = Path.GetFullPath(commonDirectory);
                 }
                 catch
                 {