From 46c665e34e3ec653406570fb77be928a10b01fad Mon Sep 17 00:00:00 2001
From: Eli Kogan-Wang <elikowa@gmail.com>
Date: Sat, 9 Sep 2023 13:49:25 +0200
Subject: [PATCH] nix-env to nix profile: maintain priorities

---
 src/nix/profile.cc | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/nix/profile.cc b/src/nix/profile.cc
index 324fd6330..cb310156f 100644
--- a/src/nix/profile.cc
+++ b/src/nix/profile.cc
@@ -16,6 +16,7 @@
 #include <nlohmann/json.hpp>
 #include <regex>
 #include <iomanip>
+#include <charconv>
 
 #include "strings.hh"
 
@@ -186,6 +187,16 @@ struct ProfileManifest
             for (auto & packageInfo : packageInfos) {
                 ProfileElement element;
                 element.storePaths = {packageInfo.queryOutPath()};
+                Value * priorityV = drvInfo.queryMeta("priority");
+                if (priorityV && priorityV->type() == nString) {
+                    auto result = std::from_chars(
+                        priorityV->str().data(),
+                        priorityV->str().data() + priorityV->str().size(),
+                        element.priority);
+                    if (result.ec != std::errc()) {
+                        throw Error("profile manifest '%s' has invalid priority '%s'", manifestPath, priorityV->str());
+                    }
+                }
                 addElement(std::move(element));
             }
         }