From: Mike Brady <4265913+mikebrady@users.noreply.github.com>
Date: Fri, 14 May 2021 15:47:24 +0000 (+0100)
Subject: If git exists and produces a version with 'git describe --dirty' use it. Otherwise... 
X-Git-Tag: 1.2~130
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8af76ecffaa3451405e7c78f56b7d211435217a6;p=thirdparty%2Fnqptp.git

If git exists and produces a version with 'git describe --dirty' use it. Otherwise use the version from configure.ac
---

diff --git a/.gitignore b/.gitignore
index b67ad45..1603619 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,3 +50,7 @@ Makefile
 
 # Executable
 nqptp
+
+# Version file generated from '$ git describe --dirty'
+gitversion.h
+
diff --git a/Makefile.am b/Makefile.am
index 14696c9..e7dd834 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,6 +3,17 @@ nqptp_SOURCES = nqptp.c nqptp-clock-sources.c nqptp-message-handlers.c nqptp-uti
 
 AM_CFLAGS = -fno-common -Wno-multichar -Wall -Wextra -Wno-clobbered -Wno-psabi -pthread
 
+if USE_GIT
+nqptp.c: gitversion.h
+gitversion.h: FORCE
+	echo "// Do not edit!" > gitversion.h
+	echo "// This file is automatically generated by 'git describe --dirty', if available." >> gitversion.h
+	echo -n "  char git_version_string[] = \"" >> gitversion.h
+	git describe --dirty | tr -d '[[:space:]]' >> gitversion.h
+	echo "\";" >> gitversion.h
+FORCE: ;
+endif
+
 install-exec-hook:
 	-e /lib/systemd/system || mkdir -p /lib/systemd/system
-	-f /lib/systemd/system/nqptp.service || cp nqptp.service /lib/systemd/system
\ No newline at end of file
+	-f /lib/systemd/system/nqptp.service || cp nqptp.service /lib/systemd/system
diff --git a/configure.ac b/configure.ac
index 26fe52d..2efff05 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,6 +4,13 @@
 AC_PREREQ([2.68])
 AC_INIT([nqptp], [1.1-dev], [4265913+mikebrady@users.noreply.github.com])
 AM_INIT_AUTOMAKE
+
+AC_CHECK_PROGS([GIT], [git])
+if test -n "$GIT"; then
+  AC_DEFINE([CONFIG_USE_GIT_VERSION_STRING], 1, [Use the version string produced by running 'git describe --dirty'.])
+fi
+AM_CONDITIONAL([USE_GIT], [test -n "$GIT"])
+
 AC_CONFIG_SRCDIR([nqptp.c])
 AC_CONFIG_HEADERS([config.h])
 
diff --git a/nqptp.c b/nqptp.c
index 63b5592..83cd796 100644
--- a/nqptp.c
+++ b/nqptp.c
@@ -25,6 +25,10 @@
 #include "nqptp-ptp-definitions.h"
 #include "nqptp-utilities.h"
 
+#ifdef CONFIG_USE_GIT_VERSION_STRING
+#include "gitversion.h"
+#endif
+
 #include <arpa/inet.h>
 #include <stdio.h>  //printf
 #include <stdlib.h> //malloc;
@@ -131,6 +135,12 @@ int main(int argc, char **argv) {
   for (i = 1; i < argc; ++i) {
     if (argv[i][0] == '-') {
       if (strcmp(argv[i] + 1, "V") == 0) {
+#ifdef CONFIG_USE_GIT_VERSION_STRING
+        if (git_version_string[0] != '\0') 
+          fprintf(stdout, "Version: %s. Shared Memory Interface Version: %u.\n", git_version_string,
+                NQPTP_SHM_STRUCTURES_VERSION);
+        else
+#endif
         fprintf(stdout, "Version: %s. Shared Memory Interface Version: %u.\n", VERSION,
                 NQPTP_SHM_STRUCTURES_VERSION);
         exit(EXIT_SUCCESS);