Print on the title screen and in console if there are uncommitted changes

src/Makefile

@@ -195,6 +195,14 @@ passthru_opts:=
 # separate suffix with an underscore
 exesuffix:=$(call _,$(EXESUFFIX))
 
+# If there are uncommitted changes
+# -uno: disregard untracked files
+# Warning: this can only be accurate for comptime.c since
+# that file is always recompiled!
+ifneq ($(shell git status --porcelain -uno),)
+opts+=-DCOMPVERSION_UNCOMMITTED
+endif
+
 include Makefile.d/platform.mk
 include Makefile.d/features.mk
 include Makefile.d/versions.mk

src/comptime.c

@@ -15,6 +15,13 @@ const char *comprevision = SRB2_COMP_REVISION;
 #elif (defined(COMPVERSION))
 #include "comptime.h"
 
+const int compuncommitted =
+#if (defined(COMPVERSION_UNCOMMITTED))
+1;
+#else
+0;
+#endif
+
 #else
 const char *compbranch = "Unknown";
 const char *comprevision = "illegal";

src/d_netcmd.c

@@ -4756,6 +4756,9 @@ static void Command_Version_f(void)
 	CONS_Printf("\x87" "DEVELOP " "\x80");
 #endif
 
+	if (compuncommitted)
+		CONS_Printf("\x85" "! UNCOMMITTED CHANGES ! " "\x80");
+
 	CONS_Printf("\n");
 }
 

src/doomdef.h

@@ -613,6 +613,7 @@ UINT32 quickncasehash (const char *p, size_t n)
 
 // Compile date and time and revision.
 extern const char *compdate, *comptime, *comprevision, *compbranch;
+extern int compuncommitted;
 
 // Disabled code and code under testing
 // None of these that are disabled in the normal build are guaranteed to work perfectly

src/f_finale.c

@@ -2006,6 +2006,8 @@ void F_TitleScreenDrawer(void)
 #else // Regular build
 					addtext(V_ALLOWLOWERCASE|V_TRANSLUCENT, va("%s", VERSIONSTRING));
 #endif
+					if (compuncommitted)
+						addtext(V_REDMAP|V_STRINGDANCE, "! UNCOMMITTED CHANGES !");
 				}
 #undef addtext
 			}