Add conda_build_local_paths to Context to set conda-bld paths

libmamba/include/mamba/core/context.hpp

@@ -248,6 +248,9 @@ namespace mamba
         void set_verbosity(int lvl);
         void set_log_level(log_level level);
 
+        std::vector<std::string> conda_build_local_paths;
+        std::vector<std::string> get_conda_build_local_paths() const;
+
     protected:
 
         Context();

libmamba/src/api/configuration.cpp

@@ -1225,6 +1225,16 @@ namespace mamba
                         The list of channel names and/or urls used for the 'defaults'
                         multichannel.)")));
 
+        insert(Configurable("conda_build_local_paths", &ctx.conda_build_local_paths)
+                   .group("Channels")
+                   .description("Locations of conda-bld artifacts")
+                   .long_description(unindent(R"(
+                        The list of locations where conda-bld artifacts may be located.
+                        This list will create a multichannel with the name 'local'.
+                        This is configurable only from the API and is intended to be
+                        used by applications to configure conda-bld paths and not by
+                        users of mamba.)")));
+
         insert(Configurable("custom_channels", &ctx.custom_channels)
                    .group("Channels")
                    .set_rc_configurable()

libmamba/src/core/channel.cpp

@@ -736,12 +736,7 @@ namespace mamba
         m_custom_multichannels.emplace(DEFAULT_CHANNELS_NAME, std::move(default_names));
 
         // Local channels
-        std::vector<std::string> local_channels = {
-            Context::instance().prefix_params.target_prefix.string() + "/conda-bld",
-            Context::instance().prefix_params.root_prefix.string() + "/conda-bld",
-            "~/conda-bld"
-        };
-
+        std::vector<std::string> local_channels = Context::instance().get_conda_build_local_paths();
         std::vector<std::string> local_names;
         local_names.reserve(local_channels.size());
         for (const auto& p : local_channels)

libmamba/src/core/context.cpp

@@ -366,4 +366,18 @@ namespace mamba
         logger->dump_backtrace_no_guards();
     }
 
+    std::vector<std::string> Context::get_conda_build_local_paths() const
+    {
+        if (conda_build_local_paths.empty())
+        {
+            return { prefix_params.target_prefix.string() + "/conda-bld",
+                     prefix_params.root_prefix.string() + "/conda-bld",
+                     "~/conda-bld" };
+        }
+        else
+        {
+            return conda_build_local_paths;
+        }
+    }
+
 }  // namespace mamba

libmambapy/libmambapy/__init__.pyi

@@ -564,6 +564,14 @@ class Context:
     def channels(self, arg0: typing.List[str]) -> None:
         pass
     @property
+    def conda_build_local_paths(self) -> typing.List[str]:
+        """
+        :type: typing.List[str]
+        """
+    @conda_build_local_paths.setter
+    def conda_build_local_paths(self, arg0: typing.List[str]) -> None:
+        pass
+    @property
     def conda_prefix(self) -> Path:
         """
         :type: Path

libmambapy/src/main.cpp

@@ -543,6 +543,7 @@ PYBIND11_MODULE(bindings, m)
         .def_readwrite("custom_channels", &Context::custom_channels)
         .def_readwrite("custom_multichannels", &Context::custom_multichannels)
         .def_readwrite("default_channels", &Context::default_channels)
+        .def_readwrite("conda_build_local_paths", &Context::conda_build_local_paths)
         .def_readwrite("channel_alias", &Context::channel_alias)
         .def_readwrite("use_only_tar_bz2", &Context::use_only_tar_bz2)
         .def_readwrite("channel_priority", &Context::channel_priority)