Add log for git revision (#1293)

Will help debugging and identification of specific version

configure.ac

@@ -264,6 +264,14 @@ AC_CHECK_FUNCS(sai_bulk_object_clear_stats sai_bulk_object_get_stats)
 CXXFLAGS="$SAVED_FLAGS"
 ])
 
+AC_DEFINE([SAIREDIS_GIT_REVISION],
+ "[m4_esyscmd([echo -n $(git rev-parse --short HEAD || echo 0000000)])]",
+ [sairedis git revision information])
+
+AC_DEFINE([SAI_GIT_REVISION],
+ "[m4_esyscmd([echo -n $(cd SAI && git rev-parse --short HEAD || echo 0000000)])]",
+ [SAI git revision information])
+
 AC_OUTPUT(Makefile
  meta/Makefile
  lib/Makefile

lib/RedisRemoteSaiInterface.cpp

@@ -14,6 +14,8 @@
 #include "meta/PerformanceIntervalTimer.h"
 #include "meta/Globals.h"
 
+#include "config.h"
+
 #include <inttypes.h>
 
 using namespace sairedis;
@@ -37,6 +39,8 @@ RedisRemoteSaiInterface::RedisRemoteSaiInterface(
 {
  SWSS_LOG_ENTER();
 
+ SWSS_LOG_NOTICE("sairedis git revision %s, SAI git revision: %s", SAIREDIS_GIT_REVISION, SAI_GIT_REVISION);
+
  m_initialized = false;
 
  initialize(0, nullptr);

syncd/Syncd.cpp

@@ -28,6 +28,8 @@
 
 #include "vslib/saivs.h"
 
+#include "config.h"
+
 #include <unistd.h>
 #include <inttypes.h>
 
@@ -63,6 +65,8 @@ Syncd::Syncd(
 {
  SWSS_LOG_ENTER();
 
+ SWSS_LOG_NOTICE("sairedis git revision %s, SAI git revision: %s", SAIREDIS_GIT_REVISION, SAI_GIT_REVISION);
+
  setSaiApiLogLevel();
 
  SWSS_LOG_NOTICE("command line: %s", m_commandLineOptions->getCommandLineString().c_str());