Revert "packages.chn-bsub: use fixed bash"

This reverts commit 9595bed7c0.

packages/chn-bsub/default.nix

@@ -1,10 +1,10 @@
-{ stdenv, cmake, pkg-config, ftxui, biu, bsubConfig ? null, lib, bash }: stdenv.mkDerivation
+{ stdenv, cmake, pkg-config, ftxui, biu, bsubConfig ? null, lib }: stdenv.mkDerivation
 {
   name = "chn-bsub";
   src = ./.;
   buildInputs = [ ftxui biu ];
   nativeBuildInputs = [ cmake pkg-config ];
   postInstall = "ln -s chn-bsub $out/bin/chn_bsub";
-  cmakeFlags = [ "-DBSUB_SH=${bash}/bin/sh" ] ++ lib.optionals (bsubConfig != null) [ "-DBSUB_CONFIG=${bsubConfig}" ];
+  cmakeFlags = lib.optional (bsubConfig != null) [ "-DBSUB_CONFIG=${bsubConfig}" ];
   passthru = { inherit bsubConfig; };
 }

packages/chn-bsub/src/main.cpp

@@ -8,9 +8,6 @@
 # ifndef BSUB_CONFIG
 #   define BSUB_CONFIG "./bsub.yaml"
 # endif
-# ifndef BSUB_SH
-#   define BSUB_SH "/bin/sh"
-# endif
 
 using namespace biu::literals;
 
@@ -169,8 +166,8 @@ int main()
         // 提交任务
         log.debug("submit command: {}"_f(State.SubmitCommand));
         // -c 对 \\n 的处理与通常情况下不同，我们需要用 -s 然后将命令通过标准输入传入
-        biu::exec<{.Stdin = biu::IoType::String}>
-          ({.Program = BSUB_SH, .Args = { "-s"}, .Stdin = State.SubmitCommand});
+        biu::exec<{.SearchPath = true, .Stdin = biu::IoType::String}>
+          ({.Program = "sh", .Args = { "-s"}, .Stdin = State.SubmitCommand});
         break;
       }
       else if (!State.UserCommand) return EXIT_FAILURE;