Merge pull request #485 from github/linter

Dependency linter

script/fmt

@@ -12,3 +12,10 @@ for i in */ ; do
     $formatter -w -l "$@" "${i%?}"
   fi
 done
+
+msg=`script/lint`
+if [ $? -ne 0 ];
+then
+  echo "$msg"
+  exit 1
+fi

script/lint

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+deps=$(go list -f '{{join .Deps "\n"}}' . | xargs go list -f '{{if not .Standard}}{{.ImportPath}}{{end}}' | grep -v "github.com/github/git-lfs")
+
+# exit 0 means non-vendored deps were found
+if [ $? -eq 0 ];
+then
+  echo "Non vendored dependencies found:"
+  for d in $deps; do echo "\t$d"; done
+  echo
+  echo "These dependencies should be tracked in 'Nut.toml', with an import prefix of:"
+  echo "\tgithub.com/github/git-lfs/vendor/_nuts"
+  exit 1
+else
+  echo "Looks good!"
+fi