def get_content_hash(self):
        if not self.rexists():
            return SCons.Util.MD5signature('')
        fname = self.rfile().abspath
        try:
            cs = SCons.Util.MD5filesignature(fname,
                chunksize=SCons.Node.FS.File.md5_chunksize*1024)
        except EnvironmentError, e:
            if not e.filename:
                e.filename = fname
            raise
        return cs
Return the command instance registered for the given command name.
dataset/ETHPy150Open kayhayen/Nuitka/nuitka/build/inline_copy/lib/scons-2.3.2/SCons/Node/FS.py/File.get_content_hash--crossover with--dataset/ETHPy150Open cournape/Bento/bento/commands/contexts.py/GlobalContext.retrieve_command