From 15f7fa59bec1dbb4fa94bc1c2f9018b1f14f0d65 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Na=C3=AFm=20Favier?= <n@monade.li>
Date: Fri, 23 Sep 2022 23:30:29 +0200
Subject: `unsafeDiscardReferences`

Adds a new boolean structured attribute
`outputChecks.<output>.unsafeDiscardReferences` which disables scanning
an output for runtime references.

    __structuredAttrs = true;
    outputChecks.out.unsafeDiscardReferences = true;

This is useful when creating filesystem images containing their own embedded Nix
store: they are self-contained blobs of data with no runtime dependencies.

Setting this attribute requires the experimental feature
`discard-references` to be enabled.
---
 src/libutil/experimental-features.cc | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/libutil/experimental-features.cc')

diff --git a/src/libutil/experimental-features.cc b/src/libutil/experimental-features.cc
index e0902971e..58d762ebb 100644
--- a/src/libutil/experimental-features.cc
+++ b/src/libutil/experimental-features.cc
@@ -16,6 +16,7 @@ std::map<ExperimentalFeature, std::string> stringifiedXpFeatures = {
     { Xp::ReplFlake, "repl-flake" },
     { Xp::AutoAllocateUids, "auto-allocate-uids" },
     { Xp::Cgroups, "cgroups" },
+    { Xp::DiscardReferences, "discard-references" },
 };
 
 const std::optional<ExperimentalFeature> parseExperimentalFeature(const std::string_view & name)
-- 
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