.gitlab-ci.yml: init

.gitlab-ci.yml

+stages:
+- generate
+- packages
+- cache
+
+generate-flake-ci:
+  stage: generate
+  script:
+  - nix run develop/#flake-to-gitlab-ci > flake-ci-x86_64-linux.yml
+  artifacts:
+    paths:
+      - flake-ci-x86_64-linux.yml
+
+x86_64-linux-ci:
+  stage: packages
+  trigger:
+    include:
+      - artifact: flake-ci-x86_64-linux.yml
+        job: generate-flake-ci
+    strategy: depend
+
+cachix:
+  stage: cache
+  only:
+    refs:
+    - master
+    - cachix
+    - lts/*
+  script:
+  - nix run develop/#cachix-push-horizon-devour