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{
lib,
buildPythonPackage,
fetchFromGitHub,
stdenvNoCC,
# build system
hatchling,
# dependencies
langgraph-checkpoint,
ormsgpack,
psycopg,
psycopg-pool,
# testing
pgvector,
postgresql,
postgresqlTestHook,
pytestCheckHook,
pytest-asyncio,
# passthru
gitUpdater,
}:
buildPythonPackage rec {
pname = "langgraph-checkpoint-postgres";
version = "3.0.2";
pyproject = true;
src = fetchFromGitHub {
owner = "langchain-ai";
repo = "langgraph";
tag = "checkpointpostgres==${version}";
hash = "sha256-V+S53ZYTCsaV7WMwuEMf+/NFyvy+8M6haO5oMf7o6wk=";
};
postgresqlTestSetupPost = ''
substituteInPlace tests/conftest.py \
--replace-fail "DEFAULT_URI = \"postgres://postgres:postgres@localhost:5441/postgres?sslmode=disable\"" "DEFAULT_URI = \"postgres:///$PGDATABASE\"" \
--replace-fail "DEFAULT_POSTGRES_URI = \"postgres://postgres:postgres@localhost:5441/\"" "DEFAULT_POSTGRES_URI = \"postgres:///\""
'';
sourceRoot = "${src.name}/libs/checkpoint-postgres";
build-system = [ hatchling ];
dependencies = [
langgraph-checkpoint
ormsgpack
psycopg
psycopg-pool
];
pythonRelaxDeps = [
"langgraph-checkpoint"
"psycopg-pool"
];
doCheck = !(stdenvNoCC.hostPlatform.isDarwin);
nativeCheckInputs = [
pytest-asyncio
pytestCheckHook
(postgresql.withPackages (p: [ pgvector ]))
postgresqlTestHook
];
preCheck = ''
export postgresqlTestUserOptions="LOGIN SUPERUSER"
'';
disabledTests = [
# psycopg.errors.FeatureNotSupported: extension "vector" is not available
# /nix/store/...postgresql-and-plugins-16.4/share/postgresql/extension/vector.control": No such file or directory.
"test_embed_with_path"
"test_embed_with_path_sync"
"test_scores"
"test_search_sorting"
"test_vector_store_initialization"
"test_vector_insert_with_auto_embedding"
"test_vector_update_with_embedding"
"test_vector_search_with_filters"
"test_vector_search_pagination"
"test_vector_search_edge_cases"
"test_non_ascii"
# Flaky under a parallel build (database in use)
"test_store_ttl"
];
pythonImportsCheck = [ "langgraph.checkpoint.postgres" ];
passthru = {
# python updater script sets the wrong tag
skipBulkUpdate = true;
updateScript = gitUpdater {
rev-prefix = "checkpointpostgres==";
};
};
meta = {
description = "Library with a Postgres implementation of LangGraph checkpoint saver";
homepage = "https://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint-postgres";
changelog = "https://github.com/langchain-ai/langgraph/releases/tag/${src.tag}";
license = lib.licenses.mit;
maintainers = with lib.maintainers; [
sarahec
];
};
}
|
