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 = f"{json.dumps(new_input)}\n\n"
input_bytes = input_str.encode("utf-8")
(stdoutdata, stderrdata) = sp.communicate(input_bytes)
if sp.returncode != 0:
message = f"Expression engine returned non-zero exit code on evaluation of\n{json.dumps(new_input, indent=4)}{stdoutdata}{stderrdata}"
raise Exception(message)
rval_raw = stdoutdata.decode("utf-8")
return json.loads(rval_raw)