set up ALSA_CONFIG_PATH. A bit weird...hpdl

src/main.zig

@@ -124,6 +124,18 @@ pub fn main() !void {
     defer _ = gpa.deinit();
     const allocator = gpa.allocator();
 
+    // Check and set ALSA_CONFIG_PATH if not set
+    if (std.posix.getenv("ALSA_CONFIG_PATH") == null) {
+        std.fs.cwd().access("alsa.conf", .{}) catch {
+            _ = std.fs.File.stderr().writeAll("Error: alsa.conf file not found. Please put alsa.conf in the current directory or set ALSA_CONFIG_PATH\n") catch {};
+            std.process.exit(1);
+        };
+        const c = @cImport({
+            @cInclude("stdlib.h");
+        });
+        _ = c.setenv("ALSA_CONFIG_PATH", "alsa.conf", 1);
+    }
+
     // Set up signal handling for Ctrl+C (SIGINT)
     const c = @cImport({
         @cInclude("signal.h");