judge: support HYDRO_TESTCASE

packages/hydrojudge/src/judge/default.ts

@@ -75,7 +75,7 @@ function judgeCase(c: Case, sid: string) {
                     checker_type: ctx.config.checker_type,
                     score: ctxSubtask.subtask.score,
                     detail: ctx.config.detail ?? true,
-                    env: ctx.env,
+                    env: { ...ctx.env, HYDRO_TESTCASE: c.id.toString() },
                 });
             }
         } else if (status === STATUS.STATUS_RUNTIME_ERROR && code) {

packages/hydrojudge/src/judge/interactive.ts

@@ -35,7 +35,7 @@ function judgeCase(c: Case) {
                 time: ctxSubtask.subtask.time * 2 * ctx.executeInteractor.time,
                 memory: ctxSubtask.subtask.memory * 2,
                 copyOut: ['/w/tout?'],
-                env: ctx.env,
+                env: { ...ctx.env, HYDRO_TESTCASE: c.id.toString() },
             },
         );
         // TODO handle tout (maybe pass to checker?)