SourceLink patch debugging

patches/sourcelink/0005-Allow-using-.git-directory-instead-of-gitdir-redirec.patch

@@ -0,0 +1,34 @@
+From 94b74dcdde1787617d8665e231334f089c01ce24 Mon Sep 17 00:00:00 2001
+From: Chris Rummel <crummel@microsoft.com>
+Date: Tue, 4 Aug 2020 20:28:53 -0500
+Subject: [PATCH 5/5] Allow using .git directory instead of gitdir redirect in
+ submodules.
+
+---
+ .../GitDataReader/GitRepository.cs                     | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs b/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs
+index 196c57d..e1ab9c4 100644
+--- a/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs
++++ b/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs
+@@ -209,6 +209,16 @@ private string ReadHeadCommitSha()
+         /// <returns>Null if the HEAD tip reference can't be resolved.</returns>
+         internal string ReadSubmoduleHeadCommitSha(string submoduleWorkingDirectoryFullPath)
+         {
++            // submodules don't usually have their own .git directories but can when Arcade uberclone
++            // was used.  Handle this case first since the other case throws.
++            var dotGitPath = Path.Combine(submoduleWorkingDirectoryFullPath, GitDirName);
++            if (IsGitDirectory(dotGitPath, out var directSubmoduleGitDirectory))
++            {
++                var submoduleGitDirResolver = new GitReferenceResolver(directSubmoduleGitDirectory, submoduleWorkingDirectoryFullPath);
++                return submoduleGitDirResolver.ResolveHeadReference();
++            }
++
++            // normal-looking submodule gitdir redirect, or a repo broken in some other way.
+             var gitDirectory = ReadDotGitFile(Path.Combine(submoduleWorkingDirectoryFullPath, GitDirName));
+             if (!IsGitDirectory(gitDirectory, out var commonDirectory))
+             {
+-- 
+2.18.0
+