Avoid vendoring tooling as much as possible

generate-vendor.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+echo "# This was generated by ./generate-vendor.sh" > Gopkg.lock
+echo "# This was generated by ./generate-vendor.sh" > Gopkg.toml
+
+while read -r package; do
+	cat >> Gopkg.lock <<-_EOF
+	[[projects]]
+	  branch = "master"
+	  name = "$package"
+	  revision = "$(< "$GOPATH/src/$package/.git/refs/heads/master")"
+
+	_EOF
+	cat >> Gopkg.toml <<-_EOF
+	[[constraint]]
+	  branch = "master"
+	  name = "$package"
+
+	_EOF
+done < <(sed -n 's/.*"\(golang.org\/x\/[^/]\+\)\/\?.*".*/\1/p' *.go */*.go | sort | uniq)