better version handling

meson.build

@@ -24,25 +24,22 @@ srcs = [
 
 cc = meson.get_compiler('c')
 
-git = find_program('git', required : false)
+git = find_program('git')
+git_hash    = run_command(git, 'rev-parse', '--short', 'HEAD', check: false).stdout().strip()
+git_commits = run_command(git, 'rev-list', '--count', 'HEAD', check: false).stdout().strip()
 
-if git.found()
-    git_hash = run_command(git, 'rev-parse', '--short', 'HEAD', check: false).stdout().strip()
-    git_commits = run_command(git, 'rev-list', '--count', 'HEAD', check: false).stdout().strip()
-else
-    git_hash = 'unknown'
-    git_commits = '0'
-endif
-
-add_project_arguments(
-    '-DGIT_HASH="' + git_hash + '"',
-    '-DGIT_COMMITS="' + git_commits + '"',
-    language: 'c'
+version_h = configure_file(
+    input  : 'include/version.h.in',
+    output : 'version.h',
+    configuration : {
+        'GIT_HASH'    : git_hash,
+        'GIT_COMMITS' : git_commits,
+    }
 )
 
 executable(
     'linuxSmartie',
-    srcs,
+    srcs + [version_h],
     include_directories : include_directories('include'),
     dependencies : [
         dependency('libusb-1.0', required : true),