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{
lib,
stdenv,
buildPythonPackage,
fetchFromGitHub,
# build-system
poetry-core,
# dependencies
langchain-core,
langgraph-checkpoint,
langgraph-sdk,
# tests
aiosqlite,
dataclasses-json,
grandalf,
httpx,
langgraph-checkpoint-postgres,
langgraph-checkpoint-sqlite,
langsmith,
psycopg,
psycopg-pool,
pydantic,
pytest-asyncio,
pytest-mock,
pytest-repeat,
pytest-xdist,
pytestCheckHook,
syrupy,
postgresql,
postgresqlTestHook,
}:
let
# 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.
langgraph-prebuilt = buildPythonPackage rec {
pname = "langgraph-prebuilt";
version = "0.1.1";
pyproject = true;
src = fetchFromGitHub {
owner = "langchain-ai";
repo = "langgraph";
tag = "prebuilt==${version}";
hash = "sha256-Kyyr4BSrUReC6jBp4LItuS/JNSzGK5IUaPl7UaLse78=";
};
sourceRoot = "${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 = [
pytestCheckHook
postgresql
postgresqlTestHook
];
checkInputs = [
langgraph-checkpoint
langgraph-checkpoint-postgres
langgraph-checkpoint-sqlite
psycopg
psycopg-pool
pytest-asyncio
pytest-mock
];
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"
];
};
in
buildPythonPackage rec {
pname = "langgraph";
version = "0.3.2";
pyproject = true;
src = fetchFromGitHub {
owner = "langchain-ai";
repo = "langgraph";
tag = "${version}";
hash = "sha256-EawVIzG+db2k6/tQyUHCF6SzlO77QTXsYRUm3XpLu/c=";
};
postgresqlTestSetupPost = ''
substituteInPlace tests/conftest.py \
--replace-fail "DEFAULT_POSTGRES_URI = \"postgres://postgres:postgres@localhost:5442/\"" "DEFAULT_POSTGRES_URI = \"postgres:///$PGDATABASE\""
'';
sourceRoot = "${src.name}/libs/langgraph";
build-system = [ poetry-core ];
dependencies = [
langchain-core
langgraph-checkpoint
langgraph-prebuilt
langgraph-sdk
];
pythonImportsCheck = [ "langgraph" ];
# postgresql doesn't play nicely with the darwin sandbox:
# FATAL: could not create shared memory segment: Operation not permitted
doCheck = !stdenv.hostPlatform.isDarwin;
nativeCheckInputs = [
pytestCheckHook
postgresql
postgresqlTestHook
];
checkInputs = [
aiosqlite
dataclasses-json
grandalf
httpx
langgraph-checkpoint-postgres
langgraph-checkpoint-sqlite
langsmith
psycopg
psycopg.pool
pydantic
pytest-asyncio
pytest-mock
pytest-repeat
pytest-xdist
syrupy
];
disabledTests = [
# test is flaky due to pydantic error on the exception
"test_doesnt_warn_valid_schema"
"test_tool_node_inject_store"
# Disabling tests that requires to create new random databases
"test_cancel_graph_astream"
"test_cancel_graph_astream_events_v2"
"test_channel_values"
"test_fork_always_re_runs_nodes"
"test_interruption_without_state_updates"
"test_interruption_without_state_updates_async"
"test_invoke_two_processes_in_out_interrupt"
"test_nested_graph_interrupts"
"test_no_modifier_async"
"test_no_modifier"
"test_pending_writes_resume"
"test_remove_message_via_state_update"
];
disabledTestPaths = [
# psycopg.errors.InsufficientPrivilege: permission denied to create database
"tests/test_pregel_async.py"
"tests/test_pregel.py"
"tests/test_large_cases.py"
"tests/test_large_cases_async.py"
];
passthru = {
inherit (langgraph-sdk) updateScript;
skipBulkUpdate = true; # Broken, see https://github.com/NixOS/nixpkgs/issues/379898
};
meta = {
description = "Build resilient language agents as graphs";
homepage = "https://github.com/langchain-ai/langgraph";
changelog = "https://github.com/langchain-ai/langgraph/releases/tag/${version}";
license = lib.licenses.mit;
maintainers = with lib.maintainers; [ sarahec ];
};
}
|
