From 9f37caad9100c927c9179d387c4436bedde90813 Mon Sep 17 00:00:00 2001
From: surtur <a_mirre@utb.cz>
Date: Sat, 21 May 2022 19:41:43 +0200
Subject: [PATCH] flake: add 'upcache' command

easy way to push dev env to cachix
---
 flake.nix | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/flake.nix b/flake.nix
index 696d9c1..215e78d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -127,6 +127,15 @@
             cd $(git rev-parse --show-toplevel)
             go test ./...
           '';
+          upcache = pkgs.writeShellScriptBin "upcache" ''
+            ## refs:
+            ##   https://fzakaria.com/2020/08/11/caching-your-nix-shell.html
+            ##   https://nixos.wiki/wiki/Caching_nix_shell_build_inputs
+            nix-store --query --references $(nix-instantiate shell.nix) | \
+              xargs nix-store --realise | \
+              xargs nix-store --query --requisites | \
+              cachix push go-xkcdreader
+          '';
         in
         {
           default = with pkgs; mkShell
@@ -163,6 +172,7 @@
                 ## ad-hoc cmds
                 gob
                 gota
+                upcache
 
                 gopls
                 gofumpt