Enhance build options and refactor memory management for configuration parsing

src/main.zig

@@ -16,7 +16,7 @@ pub fn main(init: std.process.Init) !void
     defer _ = gpa.deinit();
     defer if (debug)
     {
-        if (gpa.detectLeaks()) std.posix.exit(1);
+        if (gpa.detectLeaks() != 0) std.process.exit(1);
     };
 
     const allocator = if (debug) gpa.allocator() else std.heap.c_allocator;
@@ -30,8 +30,6 @@ pub fn main(init: std.process.Init) !void
         .description = "A lightweight Zig WebSocket server and mesh routing daemon.",
     });
 
-    var path: []const u8 = undefined;
-
     try parser.addOption("path", .{
         .short = 'p',
         .help  = "Configuration-File Path (*.toml)",
@@ -39,19 +37,19 @@ pub fn main(init: std.process.Init) !void
 
     var result = try parser.parseProcess(init);
 
-    if (debug)
+    const path = if (debug) path:
     {
         const tmpPath = result.getString("path") orelse "config/config.toml";
-        path = try allocator.dupe(u8, tmpPath);
+        break :path try allocator.dupe(u8, tmpPath);
     }
-    else
+    else path:
     {
         const tmpPath = result.getString("path") orelse blk: {
             const exe = try std.process.executableDirPathAlloc(io, tmpAllocator);
             break :blk  try std.Io.Dir.path.join(tmpAllocator, &.{ exe, "config/config.toml" });
         };
-        path = try allocator.dupe(u8, tmpPath);
-    }
+        break :path try allocator.dupe(u8, tmpPath);
+    };
 
     tmpArena.deinit();
 
@@ -71,6 +69,7 @@ fn run(io: std.Io, allocator: std.mem.Allocator, path: []const u8) !void
         std.process.exit(1);
     };
     defer parsed.deinit();
+    allocator.free(path);
 
     const configuration = parsed.value;