feat: add integration test for contribution workflow

tests/integration/tests/contribute/default.nix

@@ -0,0 +1,48 @@
+{
+  lib,
+  pkgs,
+  utils,
+  self,
+  ...
+}: let
+  l = lib // builtins;
+in
+  utils.writePureShellScript
+  (with pkgs; [
+    coreutils
+    nix
+  ])
+  ''
+    # create working dirs
+    mkdir $TMPDIR/{dream2nix,test-flake}
+
+    # checkout dream2nix source code
+    cd $TMPDIR/dream2nix
+    cp -r ${self}/* .
+    chmod -R +w .
+
+    # define names for new modules
+    subsystem="my-subsystem"
+    pureTranslator="my-pure-translator"
+    impureTranslator="my-impure-translator"
+    builder="my-builder"
+
+    # initialize pure translator
+    mkdir -p ./src/subsystems/$subsystem/translators/$pureTranslator
+    cp ./src/templates/translators/pure.nix ./src/subsystems/$subsystem/translators/$pureTranslator/default.nix
+
+    # initialize builder
+    mkdir -p ./src/subsystems/$subsystem/builders/$builder
+    cp ./src/templates/builders/default.nix ./src/subsystems/$subsystem/builders/$builder/default.nix
+
+    # initialize flake for building a test package
+    cp ${./my-flake.nix} $TMPDIR/test-flake/flake.nix
+    cd $TMPDIR/test-flake
+    nix flake lock --override-input dream2nix $TMPDIR/dream2nix --show-trace
+
+    # test `nix flake show`
+    nix flake show --show-trace
+
+    # build test package
+    nix build .#default --show-trace
+  ''

tests/integration/tests/contribute/my-flake.nix

@@ -0,0 +1,33 @@
+{
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    src.url = "github:nmattia/niv";
+    src.flake = false;
+  };
+
+  outputs = {
+    self,
+    dream2nix,
+    flake-parts,
+    src,
+    ...
+  }:
+    flake-parts.lib.mkFlake {inherit self;} {
+      systems = ["x86_64-linux"];
+      imports = [dream2nix.flakeModuleBeta];
+
+      perSystem = {config, ...}: {
+        # define an input for dream2nix to generate outputs for
+        dream2nix.inputs."niv" = {
+          source = src;
+          projects.my-project = {
+            name = "my-project";
+            subsytem = "my-subsystem";
+            translator = "my-pure-translator";
+          };
+        };
+      };
+    };
+}