WM (Linux): add sway version detection

Author: CarterLi

src/detection/wm/wm_linux.c

@@ -2,33 +2,93 @@
 
 #include "common/processing.h"
 #include "detection/displayserver/displayserver.h"
+#include "util/binary.h"
+#include "util/path.h"
+#include "util/stringUtils.h"
 
 const char* ffDetectWMPlugin(FF_MAYBE_UNUSED FFstrbuf* pluginName)
 {
     return "Not supported on this platform";
 }
 
-static void getHyprland(FFstrbuf* result, FF_MAYBE_UNUSED FFWMOptions* options)
+static bool extractHyprlandVersion(const char* line, FF_MAYBE_UNUSED uint32_t len, void *userdata)
 {
+    if (line[0] != 'v') return true;
+    int count = 0;
+    sscanf(line + 1, "%*d.%*d.%*d%n", &count);
+    if (count == 0) return true;
+
+    ffStrbufSetNS((FFstrbuf*) userdata, len - 1, line + 1);
+    return false;
+}
+
+static const char* getHyprland(FFstrbuf* result, FF_MAYBE_UNUSED FFWMOptions* options)
+{
+    FF_STRBUF_AUTO_DESTROY path = ffStrbufCreate();
+    const char* error = ffFindExecutableInPath("Hyprland", &path);
+    if (error) return "Failed to find Hyprland executable path";
+
+    if (ffBinaryExtractStrings(path.chars, extractHyprlandVersion, result, (uint32_t) strlen("v0.0.0")) == NULL)
+        return NULL;
+
     if (ffProcessAppendStdOut(result, (char* const[]){
-        "Hyprland",
+        path.chars,
         "--version",
         NULL
-    }) == NULL){ // Hyprland 0.46.2 built from branch v0.46.2-b at... long and multi line
+    }) == NULL)
+    { // Hyprland 0.46.2 built from branch v0.46.2-b at... long and multi line
         ffStrbufSubstrAfterFirstC(result, ' ');
         ffStrbufSubstrBeforeFirstC(result, ' ');
+        return NULL;
     }
+
+    return "Failed to run command `Hyprland --version`";
+}
+
+static bool extractSwayVersion(const char* line, FF_MAYBE_UNUSED uint32_t len, void *userdata)
+{
+    if (!ffStrStartsWith(line, "sway version ")) return true;
+
+    ffStrbufSetNS((FFstrbuf*) userdata, len - (uint32_t) strlen("sway version "), line + strlen("sway version "));
+    return false;
+}
+
+static const char* getSway(FFstrbuf* result, FF_MAYBE_UNUSED FFWMOptions* options)
+{
+    FF_STRBUF_AUTO_DESTROY path = ffStrbufCreate();
+    const char* error = ffFindExecutableInPath("sway", &path);
+    if (error) return "Failed to find sway executable path";
+
+    if (ffBinaryExtractStrings(path.chars, extractSwayVersion, result, (uint32_t) strlen("v0.0.0")) == NULL)
+    {
+        ffStrbufTrimRightSpace(result);
+        return NULL;
+    }
+
+    if (ffProcessAppendStdOut(result, (char* const[]){
+        path.chars,
+        "--version",
+        NULL
+    }) == NULL)
+    { // sway version 1.10
+        ffStrbufSubstrAfterLastC(result, ' ');
+        ffStrbufTrimRightSpace(result);
+        return NULL;
+    }
+
+    return "Failed to run command `sway --version`";
 }
 
 const char* ffDetectWMVersion(const FFstrbuf* wmName, FFstrbuf* result, FFWMOptions* options)
 {
     if (!wmName)
         return "No WM detected";
 
-    if (ffStrbufEqualS(wmName, FF_WM_PRETTY_HYPRLAND))
-        getHyprland(result, options);
-    else
-        return "Unsupported WM";
+    if (ffStrbufEqualS(wmName, "Hyprland"))
+        return getHyprland(result, options);
+
+    if (ffStrbufEqualS(wmName, "sway"))
+        return getSway(result, options);
 
-    return NULL;
+    return "Unsupported WM";
 }