[build]: generate build timestamp at the beginning and use it for the… (#2118)

* [build]: generate build timestamp at the beginning and use it for the rest of build

Signed-off-by: Guohan Lu <gulv@microsoft.com>

Makefile.work

@@ -60,6 +60,8 @@ endif
 
 OVERLAY_MODULE_CHECK := lsmod | grep "^overlay " > /dev/null 2>&1 || (echo "ERROR: Module 'overlay' not loaded. Try running 'sudo modprobe overlay'."; exit 1)
 
+BUILD_TIMESTAMP := $(shell date +%Y%m%d\.%H%M%S)
+
 DOCKER_RUN := docker run --rm=true --privileged \
     -v $(PWD):/sonic \
     -w /sonic \
@@ -88,6 +90,7 @@ SONIC_BUILD_INSTRUCTION :=  make \
                            -f slave.mk \
                            PLATFORM=$(PLATFORM) \
                            BUILD_NUMBER=$(BUILD_NUMBER) \
+                           BUILD_TIMESTAMP=$(BUILD_TIMESTAMP) \
                            ENABLE_DHCP_GRAPH_SERVICE=$(ENABLE_DHCP_GRAPH_SERVICE) \
                            SHUTDOWN_BGP_ON_START=$(SHUTDOWN_BGP_ON_START) \
                            SONIC_ENABLE_PFCWD_ON_START=$(ENABLE_PFCWD_ON_START) \

functions.sh

@@ -51,12 +51,11 @@ docker_try_rmi() {
 }
 
 sonic_get_version() {
-    DIRTY_SUFFIX="$(date +%Y%m%d\.%H%M%S)"
     local describe=$(git describe --tags)
     local latest_tag=$(git describe --tags --abbrev=0)
     local branch_name=$(git rev-parse --abbrev-ref HEAD)
     if [ -n "$(git status --untracked-files=no -s --ignore-submodules)" ]; then
-        local dirty="-dirty-$DIRTY_SUFFIX"
+        local dirty="-dirty-$BUILD_TIMESTAMP"
     fi
     BUILD_NUMBER=${BUILD_NUMBER:-0}
     ## Check if we are on tagged commit

slave.mk

@@ -32,6 +32,7 @@ PROJECT_ROOT = $(shell pwd)
 CONFIGURED_PLATFORM := $(shell [ -f .platform ] && cat .platform || echo generic)
 PLATFORM_PATH = platform/$(CONFIGURED_PLATFORM)
 export BUILD_NUMBER
+export BUILD_TIMESTAMP
 export CONFIGURED_PLATFORM
 
 ###############################################################################
@@ -133,6 +134,7 @@ $(info "ENABLE_SYSTEM_TELEMETRY"         : "$(ENABLE_SYSTEM_TELEMETRY)")
 $(info "SONIC_DEBUGGING_ON"              : "$(SONIC_DEBUGGING_ON)")
 $(info "SONIC_PROFILING_ON"              : "$(SONIC_PROFILING_ON)")
 $(info "KERNEL_PROCURE_METHOD"           : "$(KERNEL_PROCURE_METHOD)")
+$(info "BUILD_TIMESTAMP"                 : "$(BUILD_TIMESTAMP)")
 $(info )
 
 ###############################################################################