Fix nix build

.envrc

@@ -0,0 +1,5 @@
+use nix
+watch_file flake.nix
+watch_file shell.nix
+watch_file flake.lock
+watch_file .envrc

.github/workflows/build_nix.yml

@@ -24,10 +24,10 @@ jobs:
       - name: Install Nix
         uses: cachix/install-nix-action@v26
 
-      # - uses: cachix/cachix-action@v12
-      #   with:
-      #     name: espresso-systems-private
-      #     authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+      - uses: cachix/cachix-action@v12
+        with:
+          name: espresso-systems-private
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
 
       - name: Cache cargo
         uses: actions/cache@v4

.gitignore

@@ -17,3 +17,6 @@ Cargo.lock
 # Added by cargo
 
 /target
+
+# generated by nix-pre-commit-hooks
+/.pre-commit-config.yaml

Cargo.toml

@@ -7,12 +7,11 @@ authors = ["Espresso Systems <[email protected]>"]
 repository = "https://github.com/EspressoSystems/versioned-binary-serialization.git"
 description = "Version-tagged serialization adaptor with compile-time version checking"
 license = "MIT"
-
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 anyhow = "1.0"
-derive_more = "0.99"
 bincode = "1.3"
+derive_more = "0.99"
 serde = { version = "1.0", features = ["derive"] }
 serde_with = "3.4"

flake.nix

@@ -26,17 +26,11 @@
   inputs.pre-commit-hooks.inputs.flake-utils.follows = "flake-utils";
   inputs.pre-commit-hooks.inputs.nixpkgs.follows = "nixpkgs";
 
-  inputs.poetry2nixFlake = {
-    url = "github:nix-community/poetry2nix";
-    inputs.nixpkgs.follows = "nixpkgs";
-  };
-
-  outputs = { self, nixpkgs, flake-utils, rust-overlay, pre-commit-hooks, poetry2nixFlake, ... }:
+  outputs = { self, nixpkgs, flake-utils, rust-overlay, pre-commit-hooks, ... }:
     flake-utils.lib.eachDefaultSystem (system:
       let
         overlays = [ (import rust-overlay) ];
         pkgs = import nixpkgs { inherit system overlays; };
-        poetry2nix = poetry2nixFlake.lib.mkPoetry2Nix { inherit pkgs; };
         rustToolchain = pkgs.rust-bin.stable.latest.minimal.override {
           extensions = [ "rustfmt" "clippy" "llvm-tools-preview" "rust-src" ];
         };
@@ -54,10 +48,6 @@
             cargo-udeps
             cargo-sort
             cmake
-
-            # `postgresql` defaults to an older version (15), so we select the latest version (16)
-            # explicitly.
-            postgresql_16
           ] ++ lib.optionals stdenv.isDarwin [
             darwin.apple_sdk.frameworks.Security
             darwin.apple_sdk.frameworks.CoreFoundation
@@ -96,8 +86,6 @@
             license = with licenses; [ mit asl20 ];
           };
         };
-        pythonEnv = poetry2nix.mkPoetryEnv { projectDir = ./.; };
-        myPython = with pkgs; [ poetry pythonEnv ];
         shellHook  = ''
           # Prevent cargo aliases from using programs in `~/.cargo` to avoid conflicts with rustup
           # installations.
@@ -109,6 +97,8 @@
         RUST_BACKTRACE = 1;
         RUST_LOG = "info";
         RUSTFLAGS="";
+        # Use a distinct target dir for builds from within nix shells.
+        CARGO_TARGET_DIR = "target/nix";
       in {
       	checks = {
           pre-commit-check = pre-commit-hooks.lib.${system}.run {
@@ -132,33 +122,6 @@
                 entry = "cargo clippy --workspace --all-features --all-targets -- -D clippy::dbg-macro";
                 pass_filenames = false;
               };
-              license-header-c-style = {
-                enable = true;
-                description =
-                  "Ensure files with c-style comments have license header";
-                entry = ''
-                  insert_license --license-filepath .license-header.txt  --comment-style "//"'';
-                types_or = [ "rust" ];
-                pass_filenames = true;
-              };
-              license-header-hash = {
-                enable = true;
-                description =
-                  "Ensure files with hash style comments have license header";
-                entry = ''
-                  insert_license --license-filepath .license-header.txt --comment-style "#"'';
-                types_or = [ "bash" "python" "toml" "nix" ];
-                excludes = [ "poetry.lock" ];
-                pass_filenames = true;
-              };
-              license-header-html = {
-                enable = true;
-                description = "Ensure markdown files have license header";
-                entry = ''
-                  insert_license --license-filepath .license-header.txt --comment-style "<!--| ~| -->"'';
-                types_or = [ "markdown" ];
-                pass_filenames = true;
-              };
             };
           };
         };
@@ -172,20 +135,18 @@
               nixWithFlakes
               nixpkgs-fmt
               git
-              mdbook # make-doc, documentation generation
-              protobuf
               rustToolchain
-            ] ++ myPython ++ rustDeps;
+            ] ++ rustDeps;
 
-          inherit RUST_SRC_PATH RUST_BACKTRACE RUST_LOG RUSTFLAGS;
+          inherit RUST_SRC_PATH RUST_BACKTRACE RUST_LOG RUSTFLAGS CARGO_TARGET_DIR;
         };
         devShells = {
           perfShell = pkgs.mkShell {
             shellHook = shellHook;
             buildInputs = with pkgs;
-              [ nixWithFlakes cargo-llvm-cov rustToolchain protobuf ] ++ rustDeps;
+              [ nixWithFlakes cargo-llvm-cov rustToolchain ] ++ rustDeps;
 
-            inherit RUST_SRC_PATH RUST_BACKTRACE RUST_LOG RUSTFLAGS;
+            inherit RUST_SRC_PATH RUST_BACKTRACE RUST_LOG RUSTFLAGS CARGO_TARGET_DIR;
           };
         };
       });

shell.nix

@@ -0,0 +1,13 @@
+(import
+  (
+    let
+      lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+    in
+    fetchTarball {
+      url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+      sha256 = lock.nodes.flake-compat.locked.narHash;
+    }
+  )
+  {
+    src = ./.;
+  }).shellNix