From 49d61b2e4bf338042364c85d3c2ead0b33963e65 Mon Sep 17 00:00:00 2001
From: piegames <git@piegames.de>
Date: Sat, 13 Jul 2024 05:24:41 +0200
Subject: libexpr: Introduce Deprecated features

They are like experimental features, but opt-in instead of opt-out. They
will allow us to gracefully remove language features. See #437

Change-Id: I9ca04cc48e6926750c4d622c2b229b25cc142c42
---
 src/nix/main.cc | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/nix/main.cc')

diff --git a/src/nix/main.cc b/src/nix/main.cc
index 9cbe303ac..5356a0d04 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -14,6 +14,7 @@
 #include "loggers.hh"
 #include "markdown.hh"
 #include "experimental-features-json.hh"
+#include "deprecated-features-json.hh"
 
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -422,6 +423,11 @@ void mainWrapped(int argc, char * * argv)
         return;
     }
 
+    if (argc == 2 && std::string(argv[1]) == "__dump-dp-features") {
+        logger->cout(documentDeprecatedFeatures().dump());
+        return;
+    }
+
     Finally printCompletions([&]()
     {
         if (args.completions) {
-- 
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