Go Code format checker and formatter (#112)

Also formatted the files which dont adhere to go formats.
Build will fail if there exists any formatting issue

cvl/Makefile

@@ -22,6 +22,7 @@ SRC_FILES=$(shell find . -name '*.go' | grep -v '_test.go' | grep -v '/tests/')
 TEST_FILES=$(wildcard *_test.go)
 TOP_DIR := ..
 BUILD_DIR:=$(TOP_DIR)/build/cvl
+FORMAT_CHECK = $(BUILD_DIR)/.formatcheck
 
 CVL_SCHEMA_DIR = $(BUILD_DIR)/schema
 CVL_SCHEMA     = $(CVL_SCHEMA_DIR)/.done
@@ -36,7 +37,7 @@ CVL_TEST_SCHEMA     = $(CVL_TEST_SCHEMA_DIR)/.done
 CVL_TEST_YANGS      = $(wildcard testdata/schema/*.yang)
 CVL_TEST_YANGS     += $(wildcard $(YANG_SRC_DIR)/sonic/common/*.yang)
 
-DEFAULT_TARGETS = $(CVL_SCHEMA)
+DEFAULT_TARGETS = $(CVL_SCHEMA) $(FORMAT_CHECK)
 ifeq ($(NO_TEST_BINS),)
 DEFAULT_TARGETS += $(CVL_TEST_BIN)
 endif
@@ -79,6 +80,12 @@ gotest: $(CVL_TEST_SCHEMA)
 	CVL_SCHEMA_PATH=$(abspath $(CVL_TEST_SCHEMA_DIR)) \
 	tests/run_test.sh
 
+$(FORMAT_CHECK): $(SRC_FILES) $(TEST_FILES) | $$(@D)/.
+	$(TOP_DIR)/tools/test/format-check.sh \
+		--log=$(@D)/formatcheck.log \
+		$?
+	touch $@
+
 clean:
 	$(RM) -r $(CVL_TEST_DIR) $(BUILD_DIR)
 

cvl/custom_validation/common.go

@@ -81,10 +81,10 @@ const (
 
 // CVLEditConfigData Strcture for key and data in API
 type CVLEditConfigData struct {
-	VType     CVLValidateType   //Validation type
-	VOp       CVLOperation      //Operation type
-	Key       string            //Key format : "PORT|Ethernet4"
-	Data      map[string]string //Value :  {"alias": "40GE0/28", "mtu" : 9100,  "admin_status":  down}
+	VType CVLValidateType   //Validation type
+	VOp   CVLOperation      //Operation type
+	Key   string            //Key format : "PORT|Ethernet4"
+	Data  map[string]string //Value :  {"alias": "40GE0/28", "mtu" : 9100,  "admin_status":  down}
 }
 
 // CVLErrorInfo CVL Error Structure