Packages: detect pacman package count inside MSYS2 env (Windows)

Author: CarterLi

CHANGELOG.md

@@ -26,6 +26,7 @@ Features:
 * Add Wifi module support for Linux
 * Detect scaled resolutions (Windows, macOS)
 * Optimise font module printing (Windows)
+* Detect pacman package count inside MSYS2 environment (Windows)
 
 Logos:
 * Raspbian (@IamNoRobot, #373)

src/detection/packages/packages_windows.c

@@ -17,10 +17,10 @@ static uint32_t getNumElements(const char* searchPath /* including `\*` suffix *
                 counter++;
         } while (FindNextFileA(hFind, &wfd));
         FindClose(hFind);
-    }
 
-    if(type == FILE_ATTRIBUTE_DIRECTORY && counter >= 2)
-        counter -= 2; // accounting for . and ..
+        if(type == FILE_ATTRIBUTE_DIRECTORY && counter >= 2)
+            counter -= 2; // accounting for . and ..
+    }
 
     return counter;
 }
@@ -35,10 +35,8 @@ static void detectScoop(const FFinstance* instance, FFPackagesResult* result)
         result->scoop--; // scoop
 }
 
-static void detectChoco(const FFinstance* instance, FFPackagesResult* result)
+static void detectChoco(FF_MAYBE_UNUSED const FFinstance* instance, FFPackagesResult* result)
 {
-    FF_UNUSED(instance);
-
     const char* chocoInstall = getenv("ChocolateyInstall");
     if(!chocoInstall || chocoInstall[0] == '\0')
         return;
@@ -51,8 +49,22 @@ static void detectChoco(const FFinstance* instance, FFPackagesResult* result)
         result->choco--; // choco
 }
 
+static void detectPacman(FF_MAYBE_UNUSED const FFinstance* instance, FFPackagesResult* result)
+{
+    const char* msystemPrefix = getenv("MSYSTEM_PREFIX");
+    if(!msystemPrefix)
+        return;
+
+    // MSYS2
+    char pacmanPath[MAX_PATH + 3];
+    strcpy(pacmanPath, msystemPrefix);
+    strncat(pacmanPath, "/../var/lib/pacman/local/*", sizeof(pacmanPath) - 1 - strlen(pacmanPath));
+    result->pacman = getNumElements(pacmanPath, FILE_ATTRIBUTE_DIRECTORY);
+}
+
 void ffDetectPackagesImpl(const FFinstance* instance, FFPackagesResult* result)
 {
     detectScoop(instance, result);
     detectChoco(instance, result);
+    detectPacman(instance, result);
 }