[DONT MERGE] test: wrap traffic_server with strace for debugging

examples/trafficserver/devenv.nix

@@ -1,10 +1,24 @@
-{ pkgs, ... }:
+{ lib, pkgs, ... }:
 
 {
   packages = [ pkgs.curl pkgs.jq ];
 
   services.trafficserver = {
     enable = true;
+    package = pkgs.symlinkJoin {
+      inherit (pkgs.trafficserver) name;
+      paths = [ pkgs.trafficserver ];
+      postBuild = ''
+        pushd $out/bin
+        mv traffic_server .traffic_server
+        cat > traffic_server <<EOF
+        #!${pkgs.runtimeShell}
+        exec ${lib.getExe pkgs.strace} $out/bin/.traffic_server "\$@"
+        EOF
+        chmod +x traffic_server
+        popd
+      '';
+    };
     remap = "map / http://127.0.0.1 @plugin=generator.so";
     records.proxy.config = {
       proxy_name = "devenv.test";