DE (Linux): uses COSMIC_VERSION if available

https://github.com/pop-os/cosmic-comp/issues/2425#issuecomment-5652401962

src/detection/de/de_linux.c

@@ -184,6 +184,12 @@ static const char* getTrinity(FFstrbuf* result, [[maybe_unused]] FFDEOptions* op
 }
 
 static const char* getCosmic(FFstrbuf* result, [[maybe_unused]] FFDEOptions* options) {
+    const char* env = getenv("COSMIC_VERSION");
+    if (env) {
+        ffStrbufSetS(result, env);
+        return nullptr;
+    }
+
     if (ffProcessAppendStdOut(result, (char* const[]) { "cosmic-comp", "--version", nullptr }) == nullptr) {
         // cosmic-comp 0.1.0 (git commit fa88002ba41d2edec25dd7ffdee9719fbb928fc0)
         ffStrbufSubstrAfterFirstC(result, ' ');
@@ -256,7 +262,7 @@ const char* ffDetectDEVersion(const FFstrbuf* deName, FFstrbuf* result, FFDEOpti
         getUnity(result, options);
     } else if (ffStrbufEqualS(deName, "trinity")) {
         getTrinity(result, options);
-    } else if (ffStrbufEqualS(deName, "COSMIC")) {
+    } else if (ffStrbufEqualS(deName, FF_DE_PRETTY_COSMIC)) {
         getCosmic(result, options);
     } else if (ffStrbufEqualS(deName, FF_DE_PRETTY_ENLIGHTENMENT)) {
         getEnlightenment(result, options);

src/detection/displayserver/displayserver.h

@@ -17,6 +17,7 @@
 #define FF_DE_PRETTY_UKUI "UKUI"
 #define FF_DE_PRETTY_NEBIDE "NebiDE"
 #define FF_DE_PRETTY_ENLIGHTENMENT "Enlightenment"
+#define FF_DE_PRETTY_COSMIC "COSMIC"
 
 #define FF_WM_PRETTY_KWIN "KWin"
 #define FF_WM_PRETTY_MUTTER "Mutter"

src/detection/displayserver/linux/wmde.c

@@ -75,6 +75,10 @@ static const char* parseEnv(void) {
         return "Sway";
     }
 
+    if (getenv("COSMIC_VERSION") != nullptr) {
+        return "COSMIC";
+    }
+
 #if __linux__ && !__ANDROID__
     if (
         getenv("WAYLAND_DISPLAY") != nullptr &&