Game version in the menu: VERSION holds vYYYYMM-NNNNN, shown on the title screen and in the pause menu, tools/bump_version.py raises it with every change

src/menu.rs

@@ -231,6 +231,14 @@ enum Btn {
 pub const REPO_URL: &str = "https://git.familie-zink.org/zink/dungeoncraft";
 pub const CLAUDE_CODE_URL: &str = "https://claude.com/claude-code";
 
+// the game version (file VERSION, "vYYYYMM-NNNNN"): tools/bump_version.py raises it with every
+// change, and the title screen and the pause menu show it
+const VERSION_FILE: &str = include_str!("../VERSION");
+
+pub fn version() -> &'static str {
+    VERSION_FILE.trim()
+}
+
 // the Claude Code mark as pixel art (drawn next to the "made with" note)
 const CLAUDE_MARK: [&str; 5] = [
     "...############...",
@@ -683,6 +691,9 @@ impl Menu {
         self.buttons.push((r, Btn::ClaudeCode));
         let lic = tr("menu.license");
         gfx.text(&lic, grid_center(sw, gfx.measure(&lic, SMALL())), sh - CH() * 2.5, SMALL(), DIM);
+        let ver = tr("menu.version");
+        let line = format!("{} {}", ver, version());
+        gfx.text(&line, grid_center(sw, gfx.measure(&line, SMALL())), sh - CH() * 5.5, SMALL(), DIM);
         let url = REPO_URL.trim_start_matches("https://");
         let w = gfx.measure(url, SMALL());
         let r = Rect::new(grid_center(sw, w), sh - CH() * 1.5, w, GH * SMALL() + 2.0);
@@ -760,6 +771,9 @@ impl Menu {
         gfx.window_titled(x, y, cols, rows, S(), true, FRAME_HI, Color::new(0.05, 0.03, 0.04, 0.97), &tr("menu.paused"), FRAME_HI);
         let w = (cols - 6) as f32 * CW();
         self.column(gfx, x + CW() * 3.0, y + CH() * 2.0, w, &items);
+        let ver = tr("menu.version");
+        let line = format!("{} {}", ver, version());
+        gfx.text(&line, x + (cols as f32 * CW() - gfx.measure(&line, SMALL())) * 0.5, y + (rows as f32 - 1.7) * CH(), SMALL(), DIM);
     }
 
     fn draw_settings(&mut self, gfx: &Gfx, s: &Settings, tab: usize) {
@@ -1241,3 +1255,16 @@ pub fn goal_text(g: Goal) -> String {
         Goal::Freed(n) => trf("goal.freed", &[n.to_string()]),
     }
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn the_version_follows_the_scheme() {
+        let rest = super::version().strip_prefix('v').expect("the version starts with v");
+        let (month, number) = rest.split_once('-').expect("the version is vYYYYMM-NNNNN");
+        assert_eq!(month.len(), 6);
+        assert!(month.chars().all(|c| c.is_ascii_digit()));
+        assert_eq!(number.len(), 5);
+        assert!(number.parse::<u32>().expect("a number") >= 1);
+    }
+}