Makefile: Enable reusing local Go module cache during compile

Makefile

@@ -172,6 +172,13 @@ GOBUILDMAKEPATH_JOBSERVICE=$(GOBUILDMAKEPATH)/photon/jobservice
 GOBUILDMAKEPATH_REGISTRYCTL=$(GOBUILDMAKEPATH)/photon/registryctl
 GOBUILDMAKEPATH_STANDALONE_DB_MIGRATOR=$(GOBUILDMAKEPATH)/photon/standalone-db-migrator
 GOBUILDMAKEPATH_EXPORTER=$(GOBUILDMAKEPATH)/photon/exporter
+GOBUILDMOD_USE_CACHE=false
+ifeq ($(GOBUILDMOD_USE_CACHE),true)
+	GOMODCACHEPATH=$(shell go env GOMODCACHE)
+    GOBUILDMOD_CACHE_VOLUME=-v $(GOMODCACHEPATH):/go/pkg/mod
+else
+    GOBUILDMOD_CACHE_VOLUME=
+endif
 
 # binary
 CORE_BINARYPATH=$(BUILDPATH)/$(GOBUILDMAKEPATH_CORE)
@@ -339,22 +346,22 @@ check_environment:
 compile_core: gen_apis
 	@echo "compiling binary for core (golang image)..."
 	@echo $(GOBUILDPATHINCONTAINER)
-	@$(DOCKERCMD) run --rm -v $(BUILDPATH):$(GOBUILDPATHINCONTAINER) -w $(GOBUILDPATH_CORE) $(GOBUILDIMAGE) $(GOIMAGEBUILD_CORE) -o $(GOBUILDPATHINCONTAINER)/$(GOBUILDMAKEPATH_CORE)/$(CORE_BINARYNAME)
+	@$(DOCKERCMD) run --rm $(GOBUILDMOD_CACHE_VOLUME) -v $(BUILDPATH):$(GOBUILDPATHINCONTAINER) -w $(GOBUILDPATH_CORE) $(GOBUILDIMAGE) $(GOIMAGEBUILD_CORE) -o $(GOBUILDPATHINCONTAINER)/$(GOBUILDMAKEPATH_CORE)/$(CORE_BINARYNAME)
 	@echo "Done."
 
 compile_jobservice:
 	@echo "compiling binary for jobservice (golang image)..."
-	@$(DOCKERCMD) run --rm -v $(BUILDPATH):$(GOBUILDPATHINCONTAINER) -w $(GOBUILDPATH_JOBSERVICE) $(GOBUILDIMAGE) $(GOIMAGEBUILD_COMMON) -o $(GOBUILDPATHINCONTAINER)/$(GOBUILDMAKEPATH_JOBSERVICE)/$(JOBSERVICEBINARYNAME)
+	@$(DOCKERCMD) run --rm $(GOBUILDMOD_CACHE_VOLUME) -v $(BUILDPATH):$(GOBUILDPATHINCONTAINER) -w $(GOBUILDPATH_JOBSERVICE) $(GOBUILDIMAGE) $(GOIMAGEBUILD_COMMON) -o $(GOBUILDPATHINCONTAINER)/$(GOBUILDMAKEPATH_JOBSERVICE)/$(JOBSERVICEBINARYNAME)
 	@echo "Done."
 
 compile_registryctl:
 	@echo "compiling binary for harbor registry controller (golang image)..."
-	@$(DOCKERCMD) run --rm -v $(BUILDPATH):$(GOBUILDPATHINCONTAINER) -w $(GOBUILDPATH_REGISTRYCTL) $(GOBUILDIMAGE) $(GOIMAGEBUILD_COMMON) -o $(GOBUILDPATHINCONTAINER)/$(GOBUILDMAKEPATH_REGISTRYCTL)/$(REGISTRYCTLBINARYNAME)
+	@$(DOCKERCMD) run --rm $(GOBUILDMOD_CACHE_VOLUME) -v $(BUILDPATH):$(GOBUILDPATHINCONTAINER) -w $(GOBUILDPATH_REGISTRYCTL) $(GOBUILDIMAGE) $(GOIMAGEBUILD_COMMON) -o $(GOBUILDPATHINCONTAINER)/$(GOBUILDMAKEPATH_REGISTRYCTL)/$(REGISTRYCTLBINARYNAME)
 	@echo "Done."
 
 compile_standalone_db_migrator:
 	@echo "compiling binary for standalone db migrator (golang image)..."
-	@$(DOCKERCMD) run --rm -v $(BUILDPATH):$(GOBUILDPATHINCONTAINER) -w $(GOBUILDPATH_STANDALONE_DB_MIGRATOR) $(GOBUILDIMAGE) $(GOIMAGEBUILD_COMMON) -o $(GOBUILDPATHINCONTAINER)/$(GOBUILDMAKEPATH_STANDALONE_DB_MIGRATOR)/$(STANDALONE_DB_MIGRATOR_BINARYNAME)
+	@$(DOCKERCMD) run --rm $(GOBUILDMOD_CACHE_VOLUME) -v $(BUILDPATH):$(GOBUILDPATHINCONTAINER) -w $(GOBUILDPATH_STANDALONE_DB_MIGRATOR) $(GOBUILDIMAGE) $(GOIMAGEBUILD_COMMON) -o $(GOBUILDPATHINCONTAINER)/$(GOBUILDMAKEPATH_STANDALONE_DB_MIGRATOR)/$(STANDALONE_DB_MIGRATOR_BINARYNAME)
 	@echo "Done."
 
 compile: check_environment versions_prepare compile_core compile_jobservice compile_registryctl