[M7] generated flake.nix moves to build/flake.nix

src/cli/cmd_build.cpp

@@ -109,7 +109,7 @@ namespace {
 
 auto run_nix_cmake(const fs::path& project_root, const std::vector<std::string>& cmake_args,
                    std::string_view phase) -> util::Result<void> {
-    std::vector<std::string> args{"develop", "--command", "cmake"};
+    std::vector<std::string> args{"develop", "path:./build", "--command", "cmake"};
     args.insert(args.end(), cmake_args.begin(), cmake_args.end());
 
     auto r = exec::run("nix", args, exec::ExecOptions{
@@ -233,7 +233,7 @@ auto cmd_build(const fs::path& project_root, bool no_build, bool release,
             project_root / "build"));
     }
 
-    if (auto r = write_text(project_root / "flake.nix", flake_text); !r) {
+    if (auto r = write_text(project_root / "build" / "flake.nix", flake_text); !r) {
         return std::unexpected(r.error());
     }
     if (auto r = write_text(project_root / "build" / "CMakeLists.txt", cmake_text); !r) {

src/cli/cmd_test.cpp

@@ -19,8 +19,8 @@ auto cmd_test(const fs::path& project_root, bool release,
     const auto build_dir = std::format("build/{}", profile);
 
     auto r = exec::run("nix",
-                       {"develop", "--command", "ctest", "--test-dir", build_dir,
-                        "--output-on-failure"},
+                       {"develop", "path:./build", "--command", "ctest",
+                        "--test-dir", build_dir, "--output-on-failure"},
                        exec::ExecOptions{
                            .cwd = project_root,
                            .env_overrides = {},

src/cli/run.cpp

@@ -115,7 +115,7 @@ auto run(int argc, char** argv) -> int {
             return 1;
         }
         if (build_no_build) {
-            std::cout << "    Generated flake.nix, build/CMakeLists.txt, Cargoxx.lock\n";
+            std::cout << "    Generated build/flake.nix, build/CMakeLists.txt, Cargoxx.lock\n";
         } else {
             std::cout << "    Built\n";
         }