Merge pull request 'feat: add nix store volume' (#6) from patrick/nix-caching into master

Reviewed-on: #6

.woodpecker.yml

@@ -1,16 +1,19 @@
 steps:
   build-docker-image:
+    when:
+      event: push
     image: alpine:edge
     commands:
       - apk add --no-cache git nix --repository=https://dl-cdn.alpinelinux.org/alpine/edge/testing
       - echo "system-features = nixos-test benchmark big-parallel uid-range kvm" > /etc/nix/nix.conf
       - nix build --extra-experimental-features nix-command --extra-experimental-features flakes .#docker
       - cp $(nix build --extra-experimental-features nix-command --extra-experimental-features flakes --print-out-paths .#docker) ./memejoin-rs.tar.gz
+    volumes:
+      - ${AGENT_NIX_STORE_PATH}:/nix
 
   publish-image:
     when:
-      - event: tag
-        branch: master
+      event: tag
     image: docker
     secrets: [ forgejo_token ]
     commands:
@@ -20,3 +23,4 @@ steps:
       - 'docker image push git.spacegirl.nl/${CI_REPO}:${CI_COMMIT_TAG}'
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
+      - ${AGENT_NIX_STORE_PATH}:/nix

flake.nix

@@ -8,7 +8,7 @@
   outputs = { self, nixpkgs, rust-overlay, flake-utils, ... }:
     flake-utils.lib.eachDefaultSystem (system:
       let
-        tag = "0.1.4_3-alpha";
+        tag = "v0.1.4_4-alpha";
         overlays = [ (import rust-overlay) ];
         pkgs = import nixpkgs {
           inherit system overlays;