[lttng-dev] [PATCH] Add a git version information in LTTng versions compiled from git sources

[Raphaël Beamonte]

Signed-off-by: Raphaël Beamonte <raphael.beamonte at gmail.com>
---
 include/Makefile.am              |   20 +++++++++++++++++++-
 include/lttng/version.h          |   25 +++++++++++++++++++++++++
 src/bin/lttng-sessiond/main.c    |    5 +++++
 src/bin/lttng/commands/version.c |    4 ++++
 src/bin/lttng/lttng.c            |    7 ++++++-
 5 files changed, 59 insertions(+), 2 deletions(-)
 create mode 100644 include/lttng/version.h

diff --git a/include/Makefile.am b/include/Makefile.am
index 0bcb6f9..6664813 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -1 +1,19 @@
-lttnginclude_HEADERS = lttng/lttng.h lttng/lttng-error.h
+all-local:
+	(git_version=$$(git describe --long --all 2>/dev/null); \
+	version_h=$(top_builddir)/include/lttng/version.h; \
+	if [ -z "$${git_version}" ]; then \
+		if [ $$(grep -c "^#define GIT_VERSION" "$${version_h}") -gt 0 ]; then \
+			sed -i "/^#define GIT_VERSION/d" "$${version_h}"; \
+		fi; \
+	else \
+		if [ $$(grep -cE "^#define GIT_VERSION \"?$${git_version}\"?$$" "$${version_h}") -eq 0 ]; then \
+			if [ $$(grep -c "^#define GIT_VERSION" "$${version_h}") -gt 0 ]; then \
+				sed -i "s'^#define GIT_VERSION.*$$'#define GIT_VERSION \"$${git_version}\"'" "$${version_h}"; \
+			else \
+				sed -i "s'^\(#define VERSION_H.*\)$$'\1\n\n#define GIT_VERSION \"$${git_version}\"'" "$${version_h}"; \
+			fi; \
+		fi; \
+	fi)
+
+
+lttnginclude_HEADERS = lttng/lttng.h lttng/lttng-error.h lttng/version.h
diff --git a/include/lttng/version.h b/include/lttng/version.h
new file mode 100644
index 0000000..42a509d
--- /dev/null
+++ b/include/lttng/version.h
@@ -0,0 +1,25 @@
+/*
+ * version.h
+ *
+ * Linux Trace Toolkit version header file
+ *
+ * Copyright (C) 2013 - Raphaël Beamonte <raphael.beamonte at gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License, version 2.1 only,
+ * as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef VERSION_H
+#define VERSION_H
+
+#endif /* VERSION_H */
diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index f7bb53e..f0d5895 100644
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -35,6 +35,7 @@
 #include <urcu/uatomic.h>
 #include <unistd.h>
 #include <config.h>
+#include <lttng/version.h>
 
 #include <common/common.h>
 #include <common/compat/socket.h>
@@ -3547,7 +3548,11 @@ static int parse_args(int argc, char **argv)
 			usage();
 			exit(EXIT_FAILURE);
 		case 'V':
+#ifdef GIT_VERSION
+			fprintf(stdout, "%s (Git: %s)\n", VERSION, GIT_VERSION);
+#else /* GIT_VERSION */
 			fprintf(stdout, "%s\n", VERSION);
+#endif /* GIT_VERSION */
 			exit(EXIT_SUCCESS);
 		case 'S':
 			opt_sig_parent = 1;
diff --git a/src/bin/lttng/commands/version.c b/src/bin/lttng/commands/version.c
index 7f69de3..c6e9e10 100644
--- a/src/bin/lttng/commands/version.c
+++ b/src/bin/lttng/commands/version.c
@@ -24,6 +24,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 #include <config.h>
+#include <lttng/version.h>
 
 #include "../command.h"
 
@@ -79,6 +80,9 @@ int cmd_version(int argc, const char **argv)
 	}
 
 	MSG("lttng version " VERSION " - " VERSION_NAME);
+#ifdef GIT_VERSION
+        MSG("Git version: " GIT_VERSION);
+#endif
 	MSG("\n" VERSION_DESCRIPTION "\n");
 	MSG("Web site: http://lttng.org");
 	MSG("\nlttng is free software and under the GPL license and part LGPL");
diff --git a/src/bin/lttng/lttng.c b/src/bin/lttng/lttng.c
index 8562144..e30a7c6 100644
--- a/src/bin/lttng/lttng.c
+++ b/src/bin/lttng/lttng.c
@@ -25,6 +25,7 @@
 #include <sys/wait.h>
 #include <unistd.h>
 #include <config.h>
+#include <lttng/version.h>
 #include <ctype.h>
 
 #include <lttng/lttng.h>
@@ -81,7 +82,11 @@ static struct cmd_struct commands[] =  {
 
 static void usage(FILE *ofp)
 {
-	fprintf(ofp, "LTTng Trace Control " VERSION" - " VERSION_NAME"\n\n");
+	fprintf(ofp, "LTTng Trace Control " VERSION" - " VERSION_NAME"\n");
+#ifdef GIT_VERSION
+		fprintf(ofp, "Git version: " GIT_VERSION"\n");
+#endif
+	fprintf(ofp, "\n");
 	fprintf(ofp, "usage: lttng [OPTIONS] <COMMAND> [<ARGS>]\n");
 	fprintf(ofp, "\n");
 	fprintf(ofp, "Options:\n");
-- 
1.7.10.4