include git commit description in fedex_plus version output

CMakeLists.txt

@@ -200,7 +200,19 @@ CHECK_FUNCTION_EXISTS(memmove HAVE_MEMMOVE)
 
 CHECK_TYPE_SIZE("ssize_t" SSIZE_T)
 
-
+#set GIT_COMMIT_ID to the output of `git describe`
+find_package(Git)
+if(GIT_FOUND)
+    execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags RESULT_VARIABLE res_var OUTPUT_VARIABLE GIT_COM_ID )
+    if( NOT ${res_var} EQUAL 0 )
+        set( GIT_COMMIT_ID "unknown (git failed!)")
+        message( WARNING "Git failed (not a repo?). Build will not contain git revision info." )
+    endif()
+    string( REPLACE "\n" "" GIT_COMMIT_ID ${GIT_COM_ID} )
+else()
+    set( GIT_COMMIT_ID "unknown (git not found!)")
+    message( WARNING "Git not found. Build will not contain git revision info." )
+endif()
 
 # Now that all the tests are done, configure the scl_cf.h file:
 configure_file(${SCL_BINARY_DIR}/include/scl_cf.h.in ${SCL_BINARY_DIR}/include/scl_cf.h)

include/scl_cf_cmake.h.in

@@ -8,3 +8,6 @@
 #cmakedefine HAVE_MEMCPY 1
 #cmakedefine HAVE_MEMMOVE 1
 #cmakedefine HAVE_SSIZE_T 1
+
+//cmake updates this at build time
+#define SCL_COMMIT_ID "@GIT_COMMIT_ID@"

src/express/fedex.c

@@ -71,10 +71,7 @@
  *
  */
 
-char * FEDEXversion( void ) {
-    return( "V2.11.4-beta CADDETC preval June 8, 1995" );
-}
-
+#include "scl_cf.h"
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -91,11 +88,17 @@ extern int yydbg_verbose;
 
 extern int skip_exp_pause;
 char EXPRESSgetopt_options[256] = "Bbd:e:i:w:p:u:l:nrvz";
+int no_need_to_work = 0; /* TRUE if we can exit gracefully without doing any work */
 
-static void
-usage() {
+void print_fedex_version( void ) {
+    printf( "%s\nSCL version id (from git): %s\nhttp://github.com/mpictor/StepClassLibrary\n", EXPRESSprogram_name, SCL_COMMIT_ID );
+    no_need_to_work = 1;
+}
+
+static void usage() {
     fprintf( stderr, "usage: %s [-v] [-d # | -d 9 [-l nnn | -u nnn]] [-n] [-p <object_type>] {-w|-i <warning>} express_file\n", EXPRESSprogram_name );
-    fprintf( stderr, "where\t-v produces a version description\n" );
+    fprintf( stderr, "where\t-v produces the following version description:\n" );
+    print_fedex_version();
     fprintf( stderr, "\t-d turns on debugging (\"-d 0\" describes this further\n" );
     fprintf( stderr, "\t-p turns on printing when processing certain objects (see below)\n" );
     fprintf( stderr, "\t-n do not pause for internal errors (useful with delta script)\n" );
@@ -124,8 +127,6 @@ int main( int argc, char ** argv ) {
     char * cp;
     int no_warnings = 1;
     int resolve = 1;
-    int no_need_to_work = 0;/* TRUE if we can exit gracefully without */
-    /* doing any work */
 
     bool buffer_messages = false;
     char * filename = 0;
@@ -231,8 +232,7 @@ int main( int argc, char ** argv ) {
                 }
                 break;
             case 'v':
-                printf( "%s %s\n%s\n", EXPRESSprogram_name, FEDEXversion(), EXPRESSversion() );
-                no_need_to_work = 1;
+                print_fedex_version();
                 break;
             case 'z': /* to allow user to attach debugger and continue */
                 printf( "pid = %d\n", getpid() );

src/fedex_plus/fedex_main.c

@@ -77,14 +77,15 @@
 #include "../express/express.h"
 #include "../express/resolve.h"
 
-static void
-fedex_plus_usage() {
+extern void print_fedex_version( void );
+
+static void fedex_plus_usage() {
     fprintf( stderr, "usage: %s [-s|-S] [-a|-A] [-c|-C] [-L] [-v] [-d # | -d 9 -l nnn -u nnn] [-n] [-p <object_type>] {-w|-i <warning>} express_file\n", EXPRESSprogram_name );
     fprintf( stderr, "where\t-s or -S uses only single inheritance in the generated C++ classes\n" );
     fprintf( stderr, "\t-a or -A generates the early bound access functions for entity classes the old way (without an underscore)\n" );
     fprintf( stderr, "\t-c or -C generates C++ classes for use with CORBA (Orbix)\n" );
     fprintf( stderr, "\t-L prints logging code in the generated C++ classes\n" );
-    fprintf( stderr, "\t-v produces a version description\n" );
+    fprintf( stderr, "\t-v produces the version description below\n" );
     fprintf( stderr, "\t-d turns on debugging (\"-d 0\" describes this further\n" );
     fprintf( stderr, "\t-p turns on printing when processing certain objects (see below)\n" );
     fprintf( stderr, "\t-n do not pause for internal errors (useful with delta script)\n" );
@@ -104,6 +105,7 @@ fedex_plus_usage() {
     fprintf( stderr, "	s	schema or file\n" );
     fprintf( stderr, "	#	pass #\n" );
     fprintf( stderr, "	E	everything (all of the above)\n" );
+    print_fedex_version();
     exit( 2 );
 }
 
@@ -121,8 +123,7 @@ int success( Express model ) {
 
 /* This function is called from main() which is part of the NIST Express
    Toolkit.  It assigns 2 pointers to functions which are called in main() */
-void
-EXPRESSinit_init() {
+void EXPRESSinit_init() {
     EXPRESSbackend = print_file;
     EXPRESSsucceed = success;
     EXPRESSgetopt = Handle_FedPlus_Args;