CI: Use caching for nix

.woodpecker/agent-release.yml

@@ -1,7 +1,7 @@
-depends_on:
-  - build
-  - test
-  - lint
+#depends_on:
+#  - build
+#  - test
+#  - lint
 
 when:
   - event: push
@@ -17,9 +17,15 @@ steps:
   build:
     image: nixos/nix:latest
     commands:
-      - nix --extra-experimental-features "nix-command flakes" build ".#agent.${BUILD_TARGET}"
+      - export AWS_ACCESS_KEY_ID="$${R2_CACHE_ACCESS_KEY}"
+      - export AWS_SECRET_ACCESS_KEY="$${R2_CACHE_SECRET_KEY}"
+      - echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf
+      - echo "substituters = s3://prymn-cache?endpoint=75178f9eca227dea51b3db4db2c15a5a.r2.cloudflarestorage.com&region=auto https://cache.nixos.org/" >> /etc/nix/nix.conf
+      - nix build -L ".#agent.${BUILD_TARGET}"
       - mkdir -p "dist/${BUILD_TARGET}-unknown-linux-musl"
       - cp result/bin/prymn_agent "dist/${BUILD_TARGET}-unknown-linux-musl/"
+      - nix copy --to 's3://prymn-cache?endpoint=75178f9eca227dea51b3db4db2c15a5a.r2.cloudflarestorage.com&region=auto' ".#agent.${BUILD_TARGET}"
+    secrets: [ R2_CACHE_ACCESS_KEY, R2_CACHE_SECRET_KEY ]
 
   release:
     image: woodpeckerci/plugin-s3

nix/rust.nix

@@ -5,8 +5,7 @@
 
 let
   craneLib = (crane.mkLib pkgs).overrideToolchain pkgs.rustToolchain;
-  buildInputs = [ pkgs.protobuf ];
-  doCheck = false;
+  nativeBuildInputs = [ pkgs.protobuf ];
   src = pkgs.lib.cleanSourceWith {
     src = craneLib.path ../.;
     filter = path: type:
@@ -15,8 +14,12 @@ let
   };
 in
 craneLib.buildPackage {
-  inherit src doCheck buildInputs;
+  inherit src nativeBuildInputs;
 
+  pname = "prymn_agent";
+  version = "0.1.0";
+  doCheck = false; # FIXME: Tests need to run on the native architecture
+  strictDeps = true;
   CARGO_BUILD_RUSTFLAGS = "-C target-feature=+crt-static -C linker=rust-lld";
   CARGO_BUILD_TARGET = buildTarget;
 }