[vcpkg] Implement 'repository' tag for NuGet binary caching (#13228)

This tag is required to correctly interface with GitHub Packages, because GHP shares a single remote for the entire organization and uses the repository field to associate a package with a particular repository.

This tag will be automatically generated if the default GitHub Actions environment variables are present (GITHUB_XYZ) or if the user defines VCPKG_NUGET_REPOSITORY.

Co-authored-by: Robert Schumacher <roschuma@microsoft.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/toolsrc/include/vcpkg/binarycaching.private.h b/toolsrc/include/vcpkg/binarycaching.private.h
index 1b5d587de..46d9d6741 100644
--- a/toolsrc/include/vcpkg/binarycaching.private.h
+++ b/toolsrc/include/vcpkg/binarycaching.private.h
@@ -31,9 +31,22 @@ namespace vcpkg
         std::string nupkg_filename() const { return Strings::concat(id, '.', version, ".nupkg"); }
     };
 
+    namespace details
+    {
+        struct NuGetRepoInfo
+        {
+            std::string repo;
+            std::string branch;
+            std::string commit;
+        };
+
+        NuGetRepoInfo get_nuget_repo_info_from_env();
+    }
+
     std::string generate_nuspec(const VcpkgPaths& paths,
                                 const Dependencies::InstallPlanAction& action,
-                                const NugetReference& ref);
+                                const NugetReference& ref,
+                                details::NuGetRepoInfo rinfo = details::get_nuget_repo_info_from_env());
 
     struct XmlSerializer
     {