--logo-source / --load-config: support path with env variables (Windows)

Author: CarterLi

src/common/io/io.h

@@ -82,6 +82,7 @@ typedef enum FFPathType
 #define FF_PATHTYPE_ANY (FF_PATHTYPE_FILE | FF_PATHTYPE_DIRECTORY)
 
 bool ffPathExists(const char* path, FFPathType pathType);
+bool ffPathExpandEnv(const char* in, FFstrbuf* out);
 
 FF_C_SCANF(2, 3)
 const char* ffGetTerminalResponse(const char* request, const char* format, ...);

src/common/io/io_unix.c

@@ -107,6 +107,11 @@ bool ffPathExists(const char* path, FFPathType type)
     return false;
 }
 
+bool ffPathExpandEnv(const char* in, FFstrbuf* out)
+{
+    return false;
+}
+
 const char* ffGetTerminalResponse(const char* request, const char* format, ...)
 {
     struct termios oldTerm, newTerm;

src/common/io/io_windows.c

@@ -98,6 +98,18 @@ bool ffPathExists(const char* path, FFPathType type)
     return false;
 }
 
+bool ffPathExpandEnv(const char* in, FFstrbuf* out)
+{
+    DWORD length = ExpandEnvironmentStringsA(in, NULL, 0);
+    if (length <= 1) return false;
+
+    ffStrbufClear(out);
+    ffStrbufEnsureFree(out, (uint32_t)length);
+    ExpandEnvironmentStringsA(in, out->chars, length);
+    out->length = (uint32_t)length - 1;
+    return true;
+}
+
 bool ffSuppressIO(bool suppress)
 {
     (void) suppress; //Not implemented.

src/fastfetch.c

@@ -693,9 +693,16 @@ static void optionParseConfigFile(FFdata* data, const char* key, const char* val
     if(isJsonConfig ? parseJsoncFile(value) : parseConfigFile(data, value))
         return;
 
-    //Try to load as a relative path
-
     FF_STRBUF_AUTO_DESTROY absolutePath = ffStrbufCreateA(128);
+    if (ffPathExpandEnv(value, &absolutePath))
+    {
+        bool success = isJsonConfig ? parseJsoncFile(value) : parseConfigFile(data, absolutePath.chars);
+
+        if(success)
+            return;
+    }
+
+    //Try to load as a relative path
 
     FF_LIST_FOR_EACH(FFstrbuf, path, instance.state.platform.dataDirs)
     {

src/logo/logo.c

@@ -332,6 +332,11 @@ static void updateLogoPath(void)
         return;
 
     FF_STRBUF_AUTO_DESTROY fullPath = ffStrbufCreate();
+    if (ffPathExpandEnv(options->source.chars, &fullPath) && ffPathExists(fullPath.chars, FF_PATHTYPE_FILE))
+    {
+        ffStrbufSet(&options->source, &fullPath);
+        return;
+    }
 
     FF_LIST_FOR_EACH(FFstrbuf, dataDir, instance.state.platform.dataDirs)
     {