nox: add git as build input

also: add nox as separate target to make build log more quiet

.travis.yml

@@ -11,10 +11,10 @@ matrix:
           dist: trusty
           before_script:
               - sudo mount -o remount,exec,size=2G,mode=755 /run/user
-          script: ./maintainers/scripts/travis-nox-review-pr.sh pr
+          script: ./maintainers/scripts/travis-nox-review-pr.sh nox pr
         - os: osx
           osx_image: xcode7.3
-          script: ./maintainers/scripts/travis-nox-review-pr.sh pr
+          script: ./maintainers/scripts/travis-nox-review-pr.sh nox pr
 git:
     depth: 1
 env:

maintainers/scripts/travis-nox-review-pr.sh

@@ -44,6 +44,13 @@ while test -n "$1"; do
             nix-shell --packages nixpkgs-lint --run "nixpkgs-lint -f $TRAVIS_BUILD_DIR"
             ;;
 
+        nox)
+            echo "=== Fetching Nox from binary cache"
+
+            # build nox silently so it's not in the log
+            nix-build "<nixpkgs>" -A nox
+            ;;
+
         pr)
             if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then
                 echo "=== No pull request found"
@@ -55,7 +62,7 @@ while test -n "$1"; do
                     token="--token $GITHUB_TOKEN"
                 fi
 
-                nix-shell --packages nox git --run "nox-review pr --slug $TRAVIS_REPO_SLUG $token $TRAVIS_PULL_REQUEST"
+                nix-shell --packages nox --run "nox-review pr --slug $TRAVIS_REPO_SLUG $token $TRAVIS_PULL_REQUEST"
             fi
             ;;
 

pkgs/tools/package-management/nox/default.nix

@@ -1,4 +1,4 @@
-{ lib, pythonPackages, fetchurl }:
+{ lib, pythonPackages, fetchurl, git }:
 
 pythonPackages.buildPythonApplication rec {
   name = "nox-${version}";
@@ -10,7 +10,7 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "11f6css8rnh7qz55z7i81cnb5h9ys98fqxq3fps3hsh64zlydj52";
   };
 
-  buildInputs = [ pythonPackages.pbr ];
+  buildInputs = [ pythonPackages.pbr git ];
 
   propagatedBuildInputs = with pythonPackages; [
       dogpile_cache