# Copyright 2025 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0
import argparse
import asyncio
import random
import eval_in_code # noqa: F401
# Import flows so they get registered
import pdf_rag # noqa: F401
import setup # noqa: F401
from genkit_demo import ai
from genkit.core.typing import BaseEvalDataPoint, EvalStatusEnum, Score
# Test evaluator that generates random scores and randomly fails
async def random_eval(datapoint: BaseEvalDataPoint, options: dict | None = None):
score = random.random()
# Throw if score is 0.5x (10% prob.)
if 0.5 <= score < 0.6:
raise ValueError('Simulated error')
# PASS if score > 0.5, else FAIL
status = EvalStatusEnum.FAIL if score < 0.5 else EvalStatusEnum.PASS_
return Score(
score=score,
status=status,
details={'reasoning': 'Randomly failed' if status == EvalStatusEnum.FAIL else 'Randomly passed'},
)
ai.define_evaluator(
name='custom/test_evaluator',
display_name='TEST - Random Eval',
definition='Randomly generates scores, for testing Evals UI only',
fn=random_eval,
)
async def main():
"""Keep alive for Dev UI."""
print('Genkit server running. Press Ctrl+C to stop.')
# Keep the process alive for Dev UI
await asyncio.Event().wait()
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Evaluator Demo')
parser.add_argument('--setup', action='store_true', help='Perform initial setup (indexing docs)')
args = parser.parse_args()
if args.setup:
from setup import setup as run_setup
ai.run_main(run_setup())
else:
ai.run_main(main())
