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|
{
lib,
stdenv,
buildPythonPackage,
fetchFromGitHub,
# build-system
poetry-core,
# dependencies
langchain-core,
langgraph-checkpoint,
# tests
langgraph-checkpoint-postgres,
langgraph-checkpoint-sqlite,
postgresql,
postgresqlTestHook,
psycopg,
psycopg-pool,
pytest-asyncio,
pytest-mock,
pytestCheckHook,
xxhash,
# passthru
nix-update-script,
}:
# langgraph-prebuilt isn't meant to be a standalone package but is bundled into langgraph at build time.
# It exists so the langgraph team can iterate on it without having to rebuild langgraph.
buildPythonPackage rec {
pname = "langgraph-prebuilt";
version = "0.1.8";
pyproject = true;
src = fetchFromGitHub {
owner = "langchain-ai";
repo = "langgraph";
tag = "prebuilt==${version}";
hash = "sha256-mYcj7HRbB5H6G0CVLOICKgdtR5Wlv9WeTIBjQJqlhOE=";
};
sourceRoot = "${src.name}/libs/prebuilt";
build-system = [ poetry-core ];
dependencies = [
langchain-core
langgraph-checkpoint
];
skipPythonImportsCheck = true; # This will be packaged with langgraph
# postgresql doesn't play nicely with the darwin sandbox:
# FATAL: could not create shared memory segment: Operation not permitted
doCheck = !stdenv.hostPlatform.isDarwin;
nativeCheckInputs = [
langgraph-checkpoint
langgraph-checkpoint-postgres
langgraph-checkpoint-sqlite
postgresql
postgresqlTestHook
psycopg
psycopg-pool
pytest-asyncio
pytest-mock
pytestCheckHook
xxhash
];
preCheck = ''
export PYTHONPATH=${src}/libs/langgraph:$PYTHONPATH
'';
pytestFlagsArray = [
"-W"
"ignore::pytest.PytestDeprecationWarning"
"-W"
"ignore::DeprecationWarning"
];
disabledTestPaths = [
# psycopg.OperationalError: connection failed: connection to server at "127.0.0.1", port 5442 failed: Connection refused
# Is the server running on that host and accepting TCP/IP connections?
"tests/test_react_agent.py"
];
passthru.updateScript = nix-update-script {
extraArgs = [
"--version-regex"
"prebuilt==(\\d+\\.\\d+\\.\\d+)"
];
};
meta = {
description = "Prebuilt agents add-on for Langgraph. Should always be bundled with langgraph";
homepage = "https://github.com/langchain-ai/langgraph";
changelog = "https://github.com/langchain-ai/langgraph/releases/tag/${version}";
license = lib.licenses.mit;
maintainers = with lib.maintainers; [ sarahec ];
};
}
|
