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Source code for galaxy.tools.expressions.evaluation

import json
import os
import subprocess

from .util import find_engine

FILE_DIRECTORY = os.path.normpath(os.path.dirname(os.path.join(__file__)))
NODE_ENGINE = os.path.join(FILE_DIRECTORY, "cwlNodeEngine.js")

[docs]def evaluate(config, input): application = find_engine(config) default_context = { "engineConfig": [], "job": {}, "context": None, "outdir": None, "tmpdir": None, } new_input = default_context new_input.update(input) sp = subprocess.Popen([application, NODE_ENGINE], shell=False, close_fds=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE) input_str = json.dumps(new_input) + "\n\n" input_bytes = input_str.encode("utf-8") (stdoutdata, stderrdata) = sp.communicate(input_bytes) if sp.returncode != 0: args = (json.dumps(new_input, indent=4), stdoutdata, stderrdata) message = "Expression engine returned non-zero exit code on evaluation of\n%s%s%s" % args raise Exception(message) return json.loads(stdoutdata.decode("utf-8"))