Make use of cachix in order to fetch pre compiled phpcs packages

The phps used via flake for local development of legacy projects
distributed pre build packages via cachix.

Install cachix and add configuration to allow fetching of pre compiled
packages.

home.nix

@@ -61,6 +61,10 @@
     pkgs.yamllint
     pkgs.kcachegrind
 
+    # In order to pull binaries from their.
+    # E.g. phpcs: https://github.com/fossar/nix-phps#how-to-use
+    pkgs.cachix
+
     # Coding / Neovim
     # Does not provide any autocompletion yet, don't know why
     # Use in conjuncion with https://github.com/autozimu/LanguageClient-neovim

home/files/nix.conf

@@ -1 +1,3 @@
 experimental-features = nix-command flakes
+substituters = https://cache.nixos.org https://fossar.cachix.org
+trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= fossar.cachix.org-1:Zv6FuqIboeHPWQS7ysLCJ7UT7xExb4OE8c4LyGb5AsE=

readme.md

@@ -103,7 +103,6 @@ Todos
 
 * Begin migrating local development to execute php. On a per customer project.
 
-  * I make use of https://github.com/fossar/nix-phps
   * `flake.nix` and `flake.lock` need to be checked into a repo … How to handle that if customer doesn't want the file?
     Maybe symlinks will work, so I've a dedicated repo with the project flakes and link them into project repos?