From c7a7d0adef949234163c08c2040fd92920b309a4 Mon Sep 17 00:00:00 2001
From: phl0 <florian@florian-wolters.de>
Date: Tue, 23 May 2017 10:07:44 +0200
Subject: [PATCH] Add compilation time stamp and GitID to binaries

---
 DMRGateway.cpp     |  4 +++-
 DMRGateway.vcxproj |  8 +++++++-
 Makefile           | 13 +++++++++++--
 prebuild.cmd       | 38 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 59 insertions(+), 4 deletions(-)
 create mode 100644 prebuild.cmd

diff --git a/DMRGateway.cpp b/DMRGateway.cpp
index 50fcdde..63f28d6 100644
--- a/DMRGateway.cpp
+++ b/DMRGateway.cpp
@@ -25,6 +25,7 @@
 #include "Thread.h"
 #include "Voice.h"
 #include "Log.h"
+#include "GitVersion.h"
 
 #include <cstdio>
 #include <vector>
@@ -77,7 +78,7 @@ int main(int argc, char** argv)
 		for (int currentArg = 1; currentArg < argc; ++currentArg) {
 			std::string arg = argv[currentArg];
 			if ((arg == "-v") || (arg == "--version")) {
-				::fprintf(stdout, "DMRGateway version %s\n", VERSION);
+				::fprintf(stdout, "DMRGateway version %s git #%.7s\n", VERSION, gitversion);
 				return 0;
 			} else if (arg.substr(0,1) == "-") {
 				::fprintf(stderr, "Usage: DMRGateway [-v|--version] [filename]\n");
@@ -231,6 +232,7 @@ int CDMRGateway::run()
 	LogInfo(HEADER4);
 
 	LogMessage("DMRGateway-%s is starting", VERSION);
+	LogMessage("Built %s %s (GitID #%.7s)", __TIME__, __DATE__, gitversion);
 
 	ret = createMMDVM();
 	if (!ret)
diff --git a/DMRGateway.vcxproj b/DMRGateway.vcxproj
index 06458c7..1b02149 100644
--- a/DMRGateway.vcxproj
+++ b/DMRGateway.vcxproj
@@ -108,6 +108,12 @@
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <AdditionalDependencies>wsock32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
+    <PreBuildEvent>
+      <Command>"$(ProjectDir)prebuild.cmd" $(ProjectDir)</Command>
+    </PreBuildEvent>
+    <PreBuildEvent>
+      <Message>prebuild.cmd generates GitVersion.h from git refs heads master</Message>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
@@ -217,4 +223,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/Makefile b/Makefile
index f0283c1..35730c2 100644
--- a/Makefile
+++ b/Makefile
@@ -10,11 +10,20 @@ OBJECTS = BPTC19696.o Conf.o CRC.o DMRData.o DMREmbeddedData.o DMREMB.o DMRFullL
 
 all:	DMRGateway
 
-DMRGateway:	$(OBJECTS) 
+DMRGateway:	GitVersion.h $(OBJECTS) 
 		$(CXX) $(OBJECTS) $(CFLAGS) $(LIBS) -o DMRGateway
 
 %.o: %.cpp
 		$(CXX) $(CFLAGS) -c -o $@ $<
 
 clean:
-		$(RM) DMRGateway *.o *.d *.bak *~
+		$(RM) DMRGateway *.o *.d *.bak *~ GitVersion.h
+
+# Export the current git version if the index file exists, else 000...
+GitVersion.h:
+ifneq ("$(wildcard .git/index)","")
+	echo "const char *gitversion = \"$(shell git rev-parse HEAD)\";" > $@
+else
+	echo "const char *gitversion = \"0000000000000000000000000000000000000000\";" > $@
+endif
+
diff --git a/prebuild.cmd b/prebuild.cmd
new file mode 100644
index 0000000..2dc5f9d
--- /dev/null
+++ b/prebuild.cmd
@@ -0,0 +1,38 @@
+@echo off
+REM This pre-build file is for MSVS VC++. It parses the git master hash and
+REM converts it into GitVersion.h for compiling into builds. [George M1GEO]
+
+cd %1
+setlocal enabledelayedexpansion
+set HEADFILE=.git\HEAD
+set HASHFILE=0
+if exist %HEADFILE% (
+	for /F "tokens=4 delims=/:" %%a in ('type %HEADFILE%') do set HEADBRANCH=%%a	
+	set HASHFILE=.git\refs\heads\!HEADBRANCH!
+	echo Found Git HEAD file: %HEADFILE%   
+	echo Git HEAD branch: !HEADBRANCH!
+	echo Git HASH file: !HASHFILE!
+	call :USEHASH
+) else (
+	echo No head file :(
+	call :USENULL
+)
+
+goto :EOF
+
+:USENULL
+set GITHASH=0000000000000000000000000000000000000000
+goto :WRITEGITVERSIONHEADER
+
+:USEHASH
+for /f %%i in ('type !HASHFILE!') do set GITHASH=%%i
+goto :WRITEGITVERSIONHEADER
+
+:WRITEGITVERSIONHEADER
+echo // File contains Git commit ID SHA1 present at buildtime (prebuild.cmd) > GitVersion.h
+echo const char *gitversion = "%GITHASH%"; >> GitVersion.h
+echo Current Git HASH: %GITHASH%
+goto :FINISHED
+
+:FINISHED
+echo GitVersion.h written...