From 5f9462caad014e4abfc762101c8d2e6b02bb1ae5 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Thu, 19 Dec 2019 12:44:55 -0500
Subject: Print version

---
 CMakeLists.txt | 12 +++++++++++-
 config.h.in    |  1 +
 src/spm.c      |  2 +-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ee2fded..a833b85 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,18 @@
 cmake_minimum_required(VERSION 3.15)
 project(spm C)
 include(CheckSymbolExists)
+find_package(Git)
 set(CMAKE_C_STANDARD 99)
-
+execute_process(
+        COMMAND ${GIT_EXECUTABLE} describe --always --tags --dirty
+        OUTPUT_VARIABLE VERSION
+        ERROR_VARIABLE VERSION_ERROR
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+if(${VERSION_ERROR})
+    message("Git required to build this software")
+    return(1)
+endif(${VERSION_ERROR})
 check_symbol_exists(strsep string.h HAVE_STRSEP)
 configure_file(${CMAKE_SOURCE_DIR}/config.h.in ${CMAKE_BINARY_DIR}/include/config.h)
 
diff --git a/config.h.in b/config.h.in
index cedd8a4..b9fd475 100644
--- a/config.h.in
+++ b/config.h.in
@@ -2,5 +2,6 @@
 #define SPM_CONFIG_IN_H
 
 #cmakedefine HAVE_STRSEP 1
+#define SPM_VERSION "${VERSION}"
 
 #endif //SPM_CONFIG_IN_H
diff --git a/src/spm.c b/src/spm.c
index 60ab3b6..58619fe 100644
--- a/src/spm.c
+++ b/src/spm.c
@@ -57,7 +57,7 @@ int main(int argc, char *argv[]) {
                 exit(0);
             }
             else if (strcmp(arg, "-V") == 0 || strcmp(arg, "--version") == 0) {
-                printf("want version\n");
+                printf("%s\n", SPM_VERSION);
                 exit(0);
             }
             else if (strcmp(arg, "-v") == 0 || strcmp(arg, "--verbose") == 0) {
-- 
cgit