ci: improvements to teh build process

.gitlab-ci.yml

@@ -6,15 +6,14 @@ stages:
   - build
   - deploy
 
-cache:
-  key: "$CI_JOB_NAME"
-  paths:
-    - target/
-
 # Set any required environment variables here
 variables:
   RUST_BACKTRACE: FULL
 
+.scripts_cache: &scripts_cache
+  - nix --extra-experimental-features 'nix-command flakes'  profile install nixpkgs#attic-client
+  - attic login skynet https://nix-cache.skynet.ie/ $CACHE_KEY
+  - attic use skynet-cache
 
 # clippy and fmt are magic
 # runs on all commits/branches
@@ -30,7 +29,7 @@ lint-clippy:
       when: never
     - changes:
         - src/**/*
-        - cargo.*
+        - Cargo.*
       when: always
 
 lint-fmt:
@@ -45,24 +44,26 @@ lint-fmt:
       when: never
     - changes:
         - src/**/*
-        - cargo.*
+        - Cargo.*
       when: always
 
 
 # has to actually compile
 build:
   stage: build
+  tags:
+    - nix
+  before_script:
+    - *scripts_cache
   script:
-    - rustc --version
-    - cargo version
-    - cargo build --verbose
-    - RUST_BACKTRACE=1 cargo test --verbose
+    - attic watch-store skynet-cache &
+    - nix --extra-experimental-features "nix-command flakes" build --verbose
   rules:
     - if: $CI_COMMIT_TAG
       when: never
     - changes:
         - src/**/*
-        - cargo.*
+        - Cargo.*
       when: on_success
 
 

flake.nix

@@ -7,6 +7,11 @@
     utils.url   = "github:numtide/flake-utils";
   };
   
+  nixConfig = {
+    extra-substituters = "https://nix-cache.skynet.ie/skynet-cache";
+    extra-trusted-public-keys = "skynet-cache:zMFLzcRZPhUpjXUy8SF8Cf7KGAZwo98SKrzeXvdWABo=";
+  };
+
   outputs = { self, nixpkgs, utils, naersk }: utils.lib.eachDefaultSystem (system: 
   let
     pkgs            = nixpkgs.legacyPackages."${system}";