Fix repodata track_features parsing

libmamba/src/core/repo.cpp

@@ -30,6 +30,7 @@ extern "C"  // Incomplete header
 #include "mamba/core/prefix_data.hpp"
 #include "mamba/core/repo.hpp"
 #include "mamba/core/util.hpp"
+#include "mamba/util/string.hpp"
 #include "mamba/util/url_manip.hpp"
 #include "solv-cpp/pool.hpp"
 #include "solv-cpp/repo.hpp"
@@ -133,6 +134,13 @@ namespace mamba
             solv.add_self_provide();
         }
 
+        auto lsplit_track_features(std::string_view features)
+        {
+            constexpr auto is_sep = [](char c) -> bool { return (c == ',') || util::is_space(c); };
+            auto [_, tail] = util::lstrip_if_parts(features, is_sep);
+            return util::lstrip_if_parts(tail, [&](char c) { return !is_sep(c); });
+        }
+
         template <typename Json, typename T>
         void deserialize_maybe_missing(Json&& j, std::string_view name, T& t)
         {
@@ -313,6 +321,15 @@ namespace mamba
                         }
                     }
                 }
+                else if (iter->is_string())
+                {
+                    auto splits = lsplit_track_features(iter->get<std::string_view>());
+                    while (!splits[0].empty())
+                    {
+                        solv.add_track_feature(splits[0]);
+                        splits = lsplit_track_features(splits[1]);
+                    }
+                }
             }
 
             solv.add_self_provide();