import os.path
import os
import subprocess

def get_exception_name(output):
    """Reads the stderr output of another Python command and grabs the
    fully qualified exception name"""
    lines = output.split("\n")
    for line in lines[1:]: # skip the "traceback" line
        line = line.rstrip()
        if line[0] == ' ': continue
        if line[-1] == ":":
            return line[:-1]
        else:
            return line

def get_dir_uid(dir):
    """Finds the uid of the person who owns this directory."""
    return os.stat(dir).st_uid

def get_version():
    """Returns the commit ID of the current Wizard install."""
    wizard_git = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), ".git")
    return subprocess.Popen(["git", "--git-dir=" + wizard_git, "rev-parse", "HEAD"]).communicate()[0]