Ask for confirmation before allowing flake Nix configuration settings

1 files changed, 11 insertions, 0 deletions

diff --git a/src/libmain/progress-bar.cc b/src/libmain/progress-bar.cc
index 07b45b3b5..0e5432fca 100644
--- a/src/libmain/progress-bar.cc
+++ b/src/libmain/progress-bar.cc
@@ -466,6 +466,17 @@ public:
             Logger::writeToStdout(s);
         }
     }
+
+    std::optional<char> ask(std::string_view msg) override
+    {
+        auto state(state_.lock());
+        if (!state->active || !isatty(STDIN_FILENO)) return {};
+        std::cerr << fmt("\r\e[K%s ", msg);
+        auto s = trim(readLine(STDIN_FILENO));
+        if (s.size() != 1) return {};
+        draw(*state);
+        return s[0];
+    }
 };
 
 Logger * makeProgressBar(bool printBuildLogs)