Use SWIGPYTHON to improve SWIG for GO wrapper.

.azure-pipelines/build-template.yml

@@ -138,6 +138,9 @@ jobs:
         pytest --cov=. --cov-report=xml
         mv coverage.xml tests/coverage.xml
         gcovr -r ./ -e ".*/swsscommon_wrap.cpp" --exclude-unreachable-branches --exclude-throw-branches -x --xml-pretty  -o coverage.xml
+        redis-cli FLUSHALL
+        make -C goext
+        make -C goext check
 
         rm -rf $(Build.ArtifactStagingDirectory)/download
       displayName: "Run swss common unit tests"

common/configdb.h

@@ -37,7 +37,7 @@ class ConfigDBConnector_Native : public SonicV2Connector_Native
     std::string m_db_name;
 };
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
 %pythoncode %{
     ## Note: diamond inheritance, reusing functions in both classes
     class ConfigDBConnector(SonicV2Connector, ConfigDBConnector_Native):
@@ -307,7 +307,7 @@ class ConfigDBPipeConnector_Native: public ConfigDBConnector_Native
     int _get_config(DBConnector& client, RedisTransactioner& pipe, std::map<std::string, std::map<std::string, std::map<std::string, std::string>>>& data, int cursor);
 };
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
 %pythoncode %{
     class ConfigDBPipeConnector(ConfigDBConnector, ConfigDBPipeConnector_Native):
 

common/countertable.h

@@ -68,7 +68,7 @@ class KeyCache {
         return m_keyMap.at(name);
     }
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     %pythoncode %{
         def __getitem__(self, name):
             return self.at(name)

common/dbconnector.h

@@ -41,7 +41,7 @@ class SonicDBConfig
     static constexpr const char *DEFAULT_SONIC_DB_CONFIG_FILE = "/var/run/redis/sonic-db/database_config.json";
     static constexpr const char *DEFAULT_SONIC_DB_GLOBAL_CONFIG_FILE = "/var/run/redis/sonic-db/database_global.json";
     static void initialize(const std::string &file = DEFAULT_SONIC_DB_CONFIG_FILE);
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     %pythoncode %{
         ## TODO: the python function and C++ one is not on-par
         @staticmethod
@@ -51,7 +51,7 @@ class SonicDBConfig
 #endif
 
     static void initializeGlobalConfig(const std::string &file = DEFAULT_SONIC_DB_GLOBAL_CONFIG_FILE);
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     %pythoncode %{
         ## TODO: the python function and C++ one is not on-par
         @staticmethod
@@ -70,7 +70,7 @@ class SonicDBConfig
     static std::string getDbHostname(const std::string &dbName, const std::string &netns = EMPTY_NAMESPACE);
     static int getDbPort(const std::string &dbName, const std::string &netns = EMPTY_NAMESPACE);
     static std::vector<std::string> getNamespaces();
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     %pythoncode %{
         ## TODO: the python function and C++ one is not on-par
         @staticmethod
@@ -163,7 +163,7 @@ class DBConnector : public RedisContext
     std::string getDbName() const;
     std::string getNamespace() const;
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     %pythoncode %{
         namespace = property(getNamespace)
     %}
@@ -181,7 +181,7 @@ class DBConnector : public RedisContext
 
     int64_t del(const std::string &key);
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     // SWIG interface file (.i) globally rename map C++ `del` to python `delete`,
     // but applications already followed the old behavior of auto renamed `_del`.
     // So we implemented old behavior for backward compatibility

common/producerstatetable.h

@@ -25,7 +25,7 @@ class ProducerStateTable : public TableBase, public TableName_KeySet
                      const std::string &op = DEL_COMMAND,
                      const std::string &prefix = EMPTY_PREFIX);
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     // SWIG interface file (.i) globally rename map C++ `del` to python `delete`,
     // but applications already followed the old behavior of auto renamed `_del`.
     // So we implemented old behavior for backward compatibility

common/producertable.h

@@ -35,7 +35,7 @@ class ProducerTable : public TableBase, public TableName_KeyValueOpQueues
                      const std::string &op = DEL_COMMAND,
                      const std::string &prefix = EMPTY_PREFIX);
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     // SWIG interface file (.i) globally rename map C++ `del` to python `delete`,
     // but applications already followed the old behavior of auto renamed `_del`.
     // So we implemented old behavior for backward compatibility

common/sonicv2connector.h

@@ -62,7 +62,7 @@ class SonicV2Connector_Native
     std::string m_netns;
 };
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
 %pythoncode %{
     class SonicV2Connector(SonicV2Connector_Native):
 

common/table.h

@@ -146,7 +146,7 @@ class TableEntryPoppable {
     }
 };
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
 %pythoncode %{
     def transpose_pops(m):
         return [tuple(m[j][i] for j in range(len(m))) for i in range(len(m[0]))]
@@ -207,7 +207,7 @@ class Table : public TableBase, public TableEntryEnumerable {
     /* Get the configured ttl value for key */
     bool ttl(const std::string &key, int64_t &reply_value);
 
-#ifdef SWIG
+#if defined(SWIG) && defined(SWIGPYTHON)
     // SWIG interface file (.i) globally rename map C++ `del` to python `delete`,
     // but applications already followed the old behavior of auto renamed `_del`.
     // So we implemented old behavior for backward compatibility

goext/Makefile

@@ -0,0 +1,25 @@
+export CGO_LDFLAGS := -lswsscommon -lhiredis
+export CGO_CXXFLAGS := -I../ -I../common/ -w -Wall -fpermissive
+
+GO ?= /usr/local/go/bin/go
+SWIG ?= /usr/bin/swig
+RM=rm -f
+LN=ln
+
+SWIG_FLAG = -go -cgo -c++ -intgosize 64
+ifeq ($(CONFIGURED_ARCH),arm64)
+SWIG_FLAG += -DSWIGWORDSIZE64
+endif
+
+.PHONY: all check clean
+
+all:
+	-$(LN) -s ../pyext/swsscommon.i swsscommon.i
+	$(SWIG) $(SWIG_FLAG) -I/usr/include/swss/ swsscommon.i
+
+check:
+	sudo CGO_LDFLAGS="$(CGO_LDFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" $(GO) test
+
+clean:
+	$(RM) swsscommon.go *.cxx
+

goext/swsscommon_test.go

@@ -0,0 +1,13 @@
+package swsscommon
+
+import (
+	"testing"
+	"os"
+	"path/filepath"
+)
+
+func TestSonicDBConfig(t *testing.T) {
+	pwd, _ := os.Getwd()
+	SonicDBConfigInitialize(filepath.Dir(pwd) + "/tests/redis_multi_db_ut_config/database_config.json")
+}
+

pyext/swsscommon.i

@@ -49,7 +49,9 @@
 %include <std_vector.i>
 %include <std_pair.i>
 %include <std_map.i>
+#ifdef SWIGPYTHON
 %include <std_shared_ptr.i>
+#endif
 %include <typemaps.i>
 %include <stdint.i>
 %include <exception.i>
@@ -64,6 +66,7 @@
 %template(GetConfigResult) std::map<std::string, std::map<std::string, std::map<std::string, std::string>>>;
 %template(GetInstanceListResult) std::map<std::string, swss::RedisInstInfo>;
 
+#ifdef SWIGPYTHON
 %exception {
     try
     {
@@ -136,6 +139,7 @@
     temp = SWIG_NewPointerObj(*$1, SWIGTYPE_p_swss__Selectable, 0);
     SWIG_Python_AppendOutput($result, temp);
 }
+#endif
 
 %inline %{
 template <typename T>