Add info about config false leafs to describe

Change-Id: Ie256f11617a48ec6dfa913cae1484550e9ec8664
diff --git a/src/interpreter.cpp b/src/interpreter.cpp
index 22c1824..f3fde9e 100644
--- a/src/interpreter.cpp
+++ b/src/interpreter.cpp
@@ -127,6 +127,11 @@
         ss << "list";
         break;
     }
+
+    if (!m_datastore.schema()->isConfig(path)) {
+        ss << " (ro)";
+    }
+
     return ss.str();
 }
 
diff --git a/src/schema.hpp b/src/schema.hpp
index 8cdffa1..b8baf34 100644
--- a/src/schema.hpp
+++ b/src/schema.hpp
@@ -54,6 +54,7 @@
     virtual bool isModule(const std::string& name) const = 0;
     virtual bool listHasKey(const schemaPath_& location, const ModuleNodePair& node, const std::string& key) const = 0;
     virtual bool leafIsKey(const std::string& leafPath) const = 0;
+    virtual bool isConfig(const std::string& path) const = 0;
     virtual const std::set<std::string> listKeys(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual yang::TypeInfo leafType(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual yang::TypeInfo leafType(const std::string& path) const = 0;
diff --git a/src/static_schema.cpp b/src/static_schema.cpp
index 6815015..50a6370 100644
--- a/src/static_schema.cpp
+++ b/src/static_schema.cpp
@@ -216,3 +216,8 @@
 {
     throw std::runtime_error{"Internal error: StaticSchema::leafTypeName(std::string) not implemented. The tests should not have called this overload."};
 }
+
+bool StaticSchema::isConfig([[maybe_unused]] const std::string& leafPath) const
+{
+    throw std::runtime_error{"Internal error: StaticSchema::isConfigLeaf(std::string) not implemented. The tests should not have called this overload."};
+}
diff --git a/src/static_schema.hpp b/src/static_schema.hpp
index 8b160b0..554d83a 100644
--- a/src/static_schema.hpp
+++ b/src/static_schema.hpp
@@ -50,6 +50,7 @@
     bool isModule(const std::string& name) const override;
     bool listHasKey(const schemaPath_& location, const ModuleNodePair& node, const std::string& key) const override;
     bool leafIsKey(const std::string& leafPath) const override;
+    bool isConfig(const std::string& leafPath) const override;
     const std::set<std::string> listKeys(const schemaPath_& location, const ModuleNodePair& node) const override;
     yang::TypeInfo leafType(const schemaPath_& location, const ModuleNodePair& node) const override;
     yang::TypeInfo leafType(const std::string& path) const override;
diff --git a/src/yang_schema.cpp b/src/yang_schema.cpp
index 2719bc6..046bfcd 100644
--- a/src/yang_schema.cpp
+++ b/src/yang_schema.cpp
@@ -455,3 +455,8 @@
     auto node = getSchemaNode(path.c_str());
     return node->dsc() ? std::optional{node->dsc()} : std::nullopt;
 }
+
+bool YangSchema::isConfig(const std::string& path) const
+{
+    return getSchemaNode(path.c_str())->flags() & LYS_CONFIG_W;
+}
diff --git a/src/yang_schema.hpp b/src/yang_schema.hpp
index a2981ed..a1b7832 100644
--- a/src/yang_schema.hpp
+++ b/src/yang_schema.hpp
@@ -36,6 +36,7 @@
     bool isModule(const std::string& name) const override;
     bool listHasKey(const schemaPath_& location, const ModuleNodePair& node, const std::string& key) const override;
     bool leafIsKey(const std::string& leafPath) const override;
+    bool isConfig(const std::string& path) const override;
     const std::set<std::string> listKeys(const schemaPath_& location, const ModuleNodePair& node) const override;
     yang::TypeInfo leafType(const schemaPath_& location, const ModuleNodePair& node) const override;
     yang::TypeInfo leafType(const std::string& path) const override;
diff --git a/tests/yang.cpp b/tests/yang.cpp
index 941586d..0f8dc8f 100644
--- a/tests/yang.cpp
+++ b/tests/yang.cpp
@@ -354,6 +354,18 @@
         }
     }
 
+    leaf clockSpeed {
+        type int64;
+        config false;
+    }
+
+    container systemStats {
+        config false;
+        leaf upTime {
+            type uint64;
+        }
+    }
+
 })";
 
 namespace std {
@@ -762,7 +774,9 @@
                        "example-schema:portSettings",
                        "example-schema:portMapping",
                        "example-schema:activeMappedPort",
-                       "example-schema:activePort"};
+                       "example-schema:activePort",
+                       "example-schema:clockSpeed",
+                       "example-schema:systemStats"};
             }
 
             SECTION("example-schema:a")
@@ -916,6 +930,14 @@
         {
             REQUIRE(ys.leafrefPath("/example-schema:activeNumber") == "/example-schema:_list/number");
         }
+
+        SECTION("isConfig")
+        {
+            REQUIRE(ys.isConfig("/example-schema:leafInt32"));
+            REQUIRE_FALSE(ys.isConfig("/example-schema:clockSpeed"));
+            REQUIRE_FALSE(ys.isConfig("/example-schema:systemStats"));
+            REQUIRE_FALSE(ys.isConfig("/example-schema:systemStats/upTime"));
+        }
     }
 
     SECTION("negative")