From 2242f128a9bb8b250bf2f845da614204a145b179 Mon Sep 17 00:00:00 2001
From: Fabrice Bellamy <12b@distrilab.fr>
Date: Thu, 19 Dec 2024 11:07:32 +0100
Subject: [PATCH] pre-fetch nixpkgs revision hash

---
 README.md    |  9 ++++++---
 krops.nix    |  5 +++--
 nixpkgs.json | 12 ++++++++++++
 3 files changed, 21 insertions(+), 5 deletions(-)
 create mode 100644 nixpkgs.json

diff --git a/README.md b/README.md
index d3d78e9..67d815a 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,16 @@
 # Nixin krops POC
 This is a proof of concept of using krops to deploy nixos configuration generated by nixin 
 
-## How to deploy
-To deploy configuration of only one server : 
+## Tips
+Deploy configuration of only one server :  
 nix-build ./krops.nix -A arachnide && ./result
 
-To deploy configration of all servers
+Deploy configration of all servers :  
 nix-build ./krops.nix -A all && ./result
 
+Update th revision of nixpkgs that is used :  
+nix-prefetch-git   --url https://github.com/NixOS/nixpkgs   --rev "refs/heads/nixos-24.11"   > nixpkgs.json
+
 ## References
 - krops : https://github.com/krebs/krops
 
diff --git a/krops.nix b/krops.nix
index cc13975..b81d214 100644
--- a/krops.nix
+++ b/krops.nix
@@ -4,6 +4,7 @@ let
   };
   lib = import "${krops}/lib";
   pkgs = import "${krops}/pkgs" {};
+  importJson = (import <nixpkgs> {}).lib.importJSON;
 
   source = name: lib.evalSource [
     {
@@ -15,8 +16,8 @@ let
         name = "${name}";
       };
       nixpkgs.git = {
-        ref = "nixos-24.11";
-        url = https://github.com/NixOS/nixpkgs-channels;
+        ref = (importJson ./nixpkgs.json).rev;
+        url = https://github.com/NixOS/nixpkgs;
       };
     }
   ];
diff --git a/nixpkgs.json b/nixpkgs.json
new file mode 100644
index 0000000..5242af5
--- /dev/null
+++ b/nixpkgs.json
@@ -0,0 +1,12 @@
+{
+  "url": "https://github.com/NixOS/nixpkgs",
+  "rev": "394571358ce82dff7411395829aa6a3aad45b907",
+  "date": "2024-12-15T20:39:46-08:00",
+  "path": "/nix/store/avy6z2v675lfxax5idvz67hn7yf32cd4-nixpkgs",
+  "sha256": "1cb6dmpfsz4zyk41b6z07nhrf20c8b6ryb103kc6088c2vm63ycv",
+  "hash": "sha256-m/lh6hYMIWDYHCAsn81CDAiXoT3gmxXI9J987W5tZrE=",
+  "fetchLFS": false,
+  "fetchSubmodules": false,
+  "deepClone": false,
+  "leaveDotGit": false
+}