refactor(help): move version to constexpr

3 files changed, 37 insertions, 12 deletions

diff --git a/src/cli.cc b/src/cli.cc
index b1f4eb4..573b9a9 100644
--- a/src/cli.cc
+++ b/src/cli.cc
@@ -72,7 +72,7 @@ auto cli::look() -> int {
     std::cout << cait::help_message() << '\n';
   } break;
   case cait::utility::hash("--version"): {
-    std::cout << VERSION << '\n';
+    std::cout << version::whole() << '\n';
   } break;
   default: {
     std::string cait_file_name = this->option("-f")->value_or("build.cait");
diff --git a/src/help.cc b/src/help.cc
index 18853e1..2271e9f 100644
--- a/src/help.cc
+++ b/src/help.cc
@@ -32,13 +32,29 @@ auto help_message() -> std::string {
          "manual).\n"
          "\n"
          "options:\n"
-         "  --version      print cait version (\"" VERSION "\")\n"
-         "  -v, --verbose  show all command lines while building\n"
-         "\n"
-         "  -C DIR   change to DIR before doing anything else\n"
-         "  -f FILE  specify input build file [default=build.cait]\n"
-         "\n"
-         "  -j N     run N jobs in parallel (0 means infinity) [default="
+         "  --version      print cait version (\"" +
+             version::whole() +
+             "\")\n"
+             "  -v, --verbose  "
+             "show all command "
+             "lines while "
+             "building\n"
+             "\n"
+             "  -C DIR   "
+             "change to DIR "
+             "before doing "
+             "anything else\n"
+             "  -f FILE  "
+             "specify input "
+             "build file "
+             "[default=build."
+             "cait]\n"
+             "\n"
+             "  -j N     run N "
+             "jobs in parallel "
+             "(0 means "
+             "infinity) "
+             "[default="
       << std::thread::hardware_concurrency() + 2
       << " on this system]\n"
          "  -k N     keep going until N jobs fail (0 means infinity) "
diff --git a/src/help.hh b/src/help.hh
index 37afb58..88517da 100644
--- a/src/help.hh
+++ b/src/help.hh
@@ -21,13 +21,22 @@
 
 #include <sstream>
 
-#define VERSION_MAJOR "0"
-#define VERSION_MINOR "1"
-#define VERSION_PATCH "0"
-#define VERSION VERSION_MAJOR "." VERSION_MINOR "." VERSION_PATCH
+#define CAIT_TO_STRING(x) #x
+#define CAIT_STR(x) CAIT_TO_STRING(x)
 
 namespace cait {
 
+namespace version {
+
+constexpr unsigned int major = 0;
+constexpr unsigned int minor = 1;
+constexpr unsigned int patch = 0;
+constexpr auto whole() -> std::string {
+  return CAIT_STR(major) "." CAIT_STR(minor) "." CAIT_STR(patch);
+}
+
+} // namespace version
+
 auto help_message() -> std::string;
 
 } // namespace cait