Add dummy git test

default.nix

@@ -191,6 +191,7 @@ rec
   inherit niv niv-sdist niv-source niv-devshell niv-cabal-upload;
 
   tests-github = pkgs.callPackage ./tests/github { inherit niv; };
+  tests-git = pkgs.callPackage ./tests/git { inherit niv; };
 
   niv-test = pkgs.runCommand "niv-test" { buildInputs = [ niv ]; }
     "niv-test && touch $out";

tests/git/default.nix

@@ -0,0 +1,31 @@
+{ pkgs, niv }:
+
+# TODO: this doesn' test anything meaningful yet because "niv git PACKAGE"
+# doesn't parse yet
+pkgs.runCommand "foo"
+  { nativeBuildInputs = [ pkgs.git niv ]; }
+  ''
+    gitdir=$(mktemp -d)
+
+    pushd $gitdir
+    git init .
+    echo hello > file
+    git config user.email "niv@foo.bar"
+    git config user.name "Niv Niverson"
+    git add file
+    git commit -m "Initial commit"
+    gitrev=$(git rev-parse HEAD)
+    popd
+
+    nivdir=$(mktemp -d)
+    pushd $nivdir
+    mkdir -p nix
+    echo "{}" > nix/sources.json
+    niv init
+    # niv add git -n my-git-repo file://$gitdir
+    # nix eval --json '(import ./nix/sources.nix).my-git-repo.rev'
+    popd
+
+    touch $out
+  ''
+