Flake-based build environment for Nix users (#3534)

.envrc

@@ -0,0 +1,16 @@
+NBS_ONLY_LOAD_ENV_VARS=1 source env.sh
+
+if command -v nix > /dev/null
+then
+  export NIMBUS_NIX_ENV=1
+
+  cd installer/nix
+  # watch_file tells direnv that changes to any of the watched files
+  # should trigger a re-evalution of the environment
+  watch_file flake.nix
+  watch_file flake.lock
+  watch_file shell.nix
+
+  mkdir -p .flake-profiles
+  eval "$(nix print-dev-env --profile ".flake-profiles/profile")"
+fi

.gitignore

@@ -22,6 +22,7 @@ build/
 # Each developer can create a personal .env file with
 # local settings overrides (e.g. WEB3_URL)
 .env
+.direnv/
 
 # Ignore dynamic, static libs and libtool archive files
 *.so

env.sh

@@ -7,9 +7,10 @@ ABS_PATH="$(cd ${REL_PATH}; pwd)"
 
 # Activate nvm only when this file is sourced without arguments:
 if [ -z "$*" ]; then
+  if ! command -v ganache-cli > /dev/null; then
     if command -v nvm > /dev/null; then
       nvm use
-    command -v ganache-cli > /dev/null || { npm install -g ganache-cli; }
+      npm install -g ganache-cli
     else
       echo <<EOF
     In order to use Ganache (a development ETH1 chain), please install NVM with:
@@ -20,6 +21,7 @@ if [ -z "$*" ]; then
 EOF
     fi
   fi
+fi
 
 # The user env file allows you to specify personal overrides for some
 # settings such as WEB3_URL, CPU_LIMIT, etc:

installer/nix/.gitignore

@@ -0,0 +1,2 @@
+# Local file unique for each user
+.flake-profiles/

installer/nix/flake.lock

@@ -0,0 +1,43 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1659877975,
+        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1659446231,
+        "narHash": "sha256-hekabNdTdgR/iLsgce5TGWmfIDZ86qjPhxDg/8TlzhE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "eabc38219184cc3e04a974fe31857d8e0eac098d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-21.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

installer/nix/flake.nix

@@ -0,0 +1,15 @@
+{
+  description = "nimbus-eth2";
+
+  inputs = {
+    nixpkgs.url = github:NixOS/nixpkgs/nixos-21.11;
+    flake-utils.url = github:numtide/flake-utils;
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.simpleFlake {
+      inherit self nixpkgs;
+      name = "nimbus-eth2";
+      shell = ./shell.nix;
+    };
+}

installer/nix/shell.nix

@@ -0,0 +1,23 @@
+{ pkgs ? import <nixpkgs> { } }: with pkgs;
+mkShell {
+  buildInputs = [
+    llvmPackages_14.clang-unwrapped
+    figlet
+    git
+    gnumake
+
+    # For installing ganache for local simulations
+    nodePackages.ganache-cli
+  ] ++ lib.optionals (!stdenv.isDarwin) [
+    lsb-release
+  ];
+
+  shellHook = ''
+    # We use clang unwrapped because the compiler wrappers under Nix
+    # ignore -march=native in order to keep the build deterministic
+    export PATH=${llvmPackages_14.clang-unwrapped}/bin:$PATH
+    export CC=clang
+
+    figlet "Welcome to Nimbus-eth2"
+  '';
+}

vendor/nim-nat-traversal

@@ -1 +1 @@
-Subproject commit 11df74552d3a3abe2c722c536c8075ef6814d5fa
+Subproject commit 27d314d65c9078924b3239fe4e2f5af0c512b28c

vendor/nimbus-build-system

@@ -1 +1 @@
-Subproject commit 07e37730c627c19848e8662352976afe7e15bb1f
+Subproject commit dc535cd4627e6c1ec023ee6d6d0c3e5d66d414e5