Merge pull request #110 from Kloenk/master

Add nix build file

Author: spenserblack

Diff for: .gitignore

@@ -6,4 +6,10 @@
 /parts
 /prime
 .gitignore.swp
-Cargo.lock
+
+
+# needed for nix
+# Cargo.lock
+
+# nix result from nix-build
+result

Diff for: .travis.yml

@@ -7,13 +7,21 @@ os:
   - linux
   - windows
   - osx
-sudo: false
 script:
-  - cargo build --verbose
   - cargo test --verbose
-notifications:
-  email:
-    on_success: never
-branches:
-  only:
-    - master
+  - cargo build --verbose
+jobs:
+  include:
+  - language: nix
+    cache:
+      directories:
+      - $HOME/nix.store
+    script:
+      - nix-build
+    before_install:
+      - sudo mkdir -p /etc/nix
+      - echo "substituters = https://cache.nixos.org/ file://$HOME/nix.store" | sudo tee -a /etc/nix/nix.conf > /dev/null
+      - echo 'require-sigs = false' | sudo tee -a /etc/nix/nix.conf > /dev/null
+    before_cache:
+      - mkdir -p $HOME/nix.store
+      - nix copy --to file://$HOME/nix.store -f default.nix buildInputs