YT-19210: expose YQL shared library for YT.

After this, a new target libyqlplugin.so appears. in open-source cmake build.
Diff in open-source YDB repo looks like the following: https://paste.yandex-team.ru/f302bdb4-7ef2-4362-91c7-6ca45f329264

1 files changed, 37 insertions, 0 deletions

diff --git a/yt/cpp/mapreduce/common/helpers.h b/yt/cpp/mapreduce/common/helpers.h
new file mode 100644
index 0000000000..2174ba820b
--- /dev/null
+++ b/yt/cpp/mapreduce/common/helpers.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include "fwd.h"
+
+#include <library/cpp/yson/node/node_io.h> // backward compatibility
+
+#include <yt/cpp/mapreduce/interface/node.h>
+#include <yt/cpp/mapreduce/interface/common.h>
+#include <library/cpp/yson/public.h>
+
+namespace NYT {
+
+////////////////////////////////////////////////////////////////////////////////
+
+TString NodeListToYsonString(const TNode::TListType& nodes);
+
+TNode PathToNode(const TRichYPath& path);
+TNode PathToParamNode(const TRichYPath& path);
+
+TString AttributesToYsonString(const TNode& attributes);
+
+TString AttributeFilterToYsonString(const TAttributeFilter& filter);
+
+TNode NodeFromTableSchema(const TTableSchema& schema);
+
+void MergeNodes(TNode& dst, const TNode& src);
+
+TYPath AddPathPrefix(const TYPath& path, const TString& pathPrefix);
+
+TString GetWriteTableCommand(const TString& apiVersion);
+TString GetReadTableCommand(const TString& apiVersion);
+TString GetWriteFileCommand(const TString& apiVersion);
+TString GetReadFileCommand(const TString& apiVersion);
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NYT