build-graph tries to look into non-closure code

[foredu]

build-graph uses location provided by symbol's meta information and assumes Clojure source code. In some cases it isn't. E.g. libpython-clj refers to Python source code. Watching a foreign source code location might be still useful for watching file changes.

This:

(ns non-clojure-source
  (:require [libpython-clj2.python :refer [initialize!]]
            [libpython-clj2.require :refer [require-python]]))

(initialize!)
(require-python 'numpy)
(numpy/loadtxt "/dev/null")

fails with Invalid symbol: BagObj:, which is related to a Python class definition in the source file ("numpy/lib/npyio.py").