import importlib

import os

import random

import re

import sys

from datetime import timedelta

from importlib.abc import Loader

from pathlib import Path

from typing import List, NamedTuple, Set, Union

import click

from click.exceptions import BadParameter

from feast import Entity, FeatureTable

from feast.feature_view import FeatureView

from feast.inference import (

infer_entity_value_type_from_feature_views,

update_data_sources_with_inferred_event_timestamp_col,

)

from feast.infra.provider import get_provider

from feast.names import adjectives, animals

from feast.registry import Registry

from feast.repo_config import RepoConfig

from feast.usage import log_exceptions_and_usage

def py_path_to_module(path: Path, repo_root: Path) -> str:

return (

str(path.relative_to(repo_root))[: -len(".py")]

.replace("./", "")

.replace("/", ".")

)

class ParsedRepo(NamedTuple):

feature_tables: List[FeatureTable]

feature_views: List[FeatureView]

entities: List[Entity]

def read_feastignore(repo_root: Path) -> List[str]:

"""Read .feastignore in the repo root directory (if exists) and return the list of user-defined ignore paths"""

feast_ignore = repo_root / ".feastignore"

if not feast_ignore.is_file():

return []

lines = feast_ignore.read_text().strip().split("\n")

ignore_paths = []

for line in lines:

# Remove everything after the first occurance of "#" symbol (comments)

if line.find("#") >= 0:

line = line[: line.find("#")]

# Strip leading or ending whitespaces

line = line.strip()

# Add this processed line to ignore_paths if it's not empty

if len(line) > 0:

ignore_paths.append(line)

return ignore_paths

def get_ignore_files(repo_root: Path, ignore_paths: List[str]) -> Set[Path]:

"""Get all ignore files that match any of the user-defined ignore paths"""

ignore_files = set()

for ignore_path in ignore_paths:

# ignore_path may contains matchers (* or **). Use glob() to match user-defined path to actual paths

for matched_path in repo_root.glob(ignore_path):

if matched_path.is_file():

# If the matched path is a file, add that to ignore_files set

ignore_files.add(matched_path.resolve())

else:

# Otherwise, list all Python files in that directory and add all of them to ignore_files set

ignore_files |= {

sub_path.resolve()

for sub_path in matched_path.glob("**/*.py")

if sub_path.is_file()

}

return ignore_files

def get_repo_files(repo_root: Path) -> List[Path]:

"""Get the list of all repo files, ignoring undesired files & directories specified in .feastignore"""

# Read ignore paths from .feastignore and create a set of all files that match any of these paths

ignore_paths = read_feastignore(repo_root)

ignore_files = get_ignore_files(repo_root, ignore_paths)

# List all Python files in the root directory (recursively)

repo_files = {p.resolve() for p in repo_root.glob("**/*.py") if p.is_file()}

# Ignore all files that match any of the ignore paths in .feastignore

repo_files -= ignore_files

# Sort repo_files to read them in the same order every time

return sorted(repo_files)

def parse_repo(repo_root: Path) -> ParsedRepo:

""" Collect feature table definitions from feature repo """

res = ParsedRepo(feature_tables=[], entities=[], feature_views=[])

for repo_file in get_repo_files(repo_root):

module_path = py_path_to_module(repo_file, repo_root)

module = importlib.import_module(module_path)

for attr_name in dir(module):

obj = getattr(module, attr_name)

if isinstance(obj, FeatureTable):

res.feature_tables.append(obj)

if isinstance(obj, FeatureView):

res.feature_views.append(obj)

elif isinstance(obj, Entity):

res.entities.append(obj)

return res

@log_exceptions_and_usage

def apply_total(repo_config: RepoConfig, repo_path: Path):

from colorama import Fore, Style

os.chdir(repo_path)

registry_config = repo_config.get_registry_config()

project = repo_config.project

if not is_valid_name(project):

print(

f"{project} is not valid. Project name should only have "

f"alphanumerical values and underscores but not start with an underscore."

)

sys.exit(1)

registry = Registry(

registry_path=registry_config.path,

repo_path=repo_path,

cache_ttl=timedelta(seconds=registry_config.cache_ttl_seconds),

)

registry._initialize_registry()

sys.dont_write_bytecode = True

repo = parse_repo(repo_path)

repo = ParsedRepo(

feature_tables=repo.feature_tables,

entities=infer_entity_value_type_from_feature_views(

repo.entities, repo.feature_views

),

feature_views=repo.feature_views,

)

sys.dont_write_bytecode = False

for entity in repo.entities:

registry.apply_entity(entity, project=project)

click.echo(

f"Registered entity {Style.BRIGHT + Fore.GREEN}{entity.name}{Style.RESET_ALL}"

)

repo_table_names = set(t.name for t in repo.feature_tables)

for t in repo.feature_views:

repo_table_names.add(t.name)

data_sources = [t.input for t in repo.feature_views]

# Make sure the data source used by this feature view is supported by Feast

for data_source in data_sources:

data_source.validate()

update_data_sources_with_inferred_event_timestamp_col(data_sources)

for view in repo.feature_views:

view.infer_features_from_input_source()

tables_to_delete = []

for registry_table in registry.list_feature_tables(project=project):

if registry_table.name not in repo_table_names:

tables_to_delete.append(registry_table)

views_to_delete = []

for registry_view in registry.list_feature_views(project=project):

if registry_view.name not in repo_table_names:

views_to_delete.append(registry_view)

# Delete tables that should not exist

for registry_table in tables_to_delete:

registry.delete_feature_table(registry_table.name, project=project)

click.echo(

f"Deleted feature table {Style.BRIGHT + Fore.GREEN}{registry_table.name}{Style.RESET_ALL} from registry"

)

# Create tables that should

for table in repo.feature_tables:

registry.apply_feature_table(table, project)

click.echo(

f"Registered feature table {Style.BRIGHT + Fore.GREEN}{table.name}{Style.RESET_ALL}"

)

# Delete views that should not exist

for registry_view in views_to_delete:

registry.delete_feature_view(registry_view.name, project=project)

click.echo(

f"Deleted feature view {Style.BRIGHT + Fore.GREEN}{registry_view.name}{Style.RESET_ALL} from registry"

)

# Create views that should

for view in repo.feature_views:

registry.apply_feature_view(view, project)

click.echo(

f"Registered feature view {Style.BRIGHT + Fore.GREEN}{view.name}{Style.RESET_ALL}"

)

infra_provider = get_provider(repo_config, repo_path)

all_to_delete: List[Union[FeatureTable, FeatureView]] = []

all_to_delete.extend(tables_to_delete)

all_to_delete.extend(views_to_delete)

all_to_keep: List[Union[FeatureTable, FeatureView]] = []

all_to_keep.extend(repo.feature_tables)

all_to_keep.extend(repo.feature_views)

entities_to_delete: List[Entity] = []

repo_entities_names = set([e.name for e in repo.entities])

for registry_entity in registry.list_entities(project=project):

if registry_entity.name not in repo_entities_names:

entities_to_delete.append(registry_entity)

entities_to_keep: List[Entity] = repo.entities

for name in [view.name for view in repo.feature_tables] + [

table.name for table in repo.feature_views

]:

click.echo(

f"Deploying infrastructure for {Style.BRIGHT + Fore.GREEN}{name}{Style.RESET_ALL}"

)

for name in [view.name for view in views_to_delete] + [

table.name for table in tables_to_delete

]:

click.echo(

f"Removing infrastructure for {Style.BRIGHT + Fore.GREEN}{name}{Style.RESET_ALL}"

)

infra_provider.update_infra(

project,

tables_to_delete=all_to_delete,

tables_to_keep=all_to_keep,

entities_to_delete=entities_to_delete,

entities_to_keep=entities_to_keep,

partial=False,

)

@log_exceptions_and_usage

def teardown(repo_config: RepoConfig, repo_path: Path):

registry_config = repo_config.get_registry_config()

registry = Registry(

registry_path=registry_config.path,

repo_path=repo_path,

cache_ttl=timedelta(seconds=registry_config.cache_ttl_seconds),

)

project = repo_config.project

registry_tables: List[Union[FeatureTable, FeatureView]] = []

registry_tables.extend(registry.list_feature_tables(project=project))

registry_tables.extend(registry.list_feature_views(project=project))

registry_entities: List[Entity] = registry.list_entities(project=project)

infra_provider = get_provider(repo_config, repo_path)

infra_provider.teardown_infra(

project, tables=registry_tables, entities=registry_entities

)

@log_exceptions_and_usage

def registry_dump(repo_config: RepoConfig, repo_path: Path):

""" For debugging only: output contents of the metadata registry """

registry_config = repo_config.get_registry_config()

project = repo_config.project

registry = Registry(

registry_path=registry_config.path,

repo_path=repo_path,

cache_ttl=timedelta(seconds=registry_config.cache_ttl_seconds),

)

for entity in registry.list_entities(project=project):

print(entity)

for feature_view in registry.list_feature_views(project=project):

print(feature_view)

def cli_check_repo(repo_path: Path):

sys.path.append(str(repo_path))

config_path = repo_path / "feature_store.yaml"

if not config_path.exists():

print(

f"Can't find feature_store.yaml at {repo_path}. Make sure you're running feast from an initialized "

f"feast repository. "

)

sys.exit(1)

@log_exceptions_and_usage

def init_repo(repo_name: str, template: str):

import os

from distutils.dir_util import copy_tree

from pathlib import Path

from colorama import Fore, Style

if not is_valid_name(repo_name):

raise BadParameter(

message="Name should be alphanumeric values and underscores but not start with an underscore",

param_hint="PROJECT_DIRECTORY",

)

repo_path = Path(os.path.join(Path.cwd(), repo_name))

repo_path.mkdir(exist_ok=True)

repo_config_path = repo_path / "feature_store.yaml"

if repo_config_path.exists():

new_directory = os.path.relpath(repo_path, os.getcwd())

print(

f"The directory {Style.BRIGHT + Fore.GREEN}{new_directory}{Style.RESET_ALL} contains an existing feature "

f"store repository that may cause a conflict"

)

print()

sys.exit(1)

# Copy template directory

template_path = str(Path(Path(__file__).parent / "templates" / template).absolute())

if not os.path.exists(template_path):

raise IOError(f"Could not find template {template}")

copy_tree(template_path, str(repo_path))

# Seed the repository

bootstrap_path = repo_path / "bootstrap.py"

if os.path.exists(bootstrap_path):

import importlib.util

spec = importlib.util.spec_from_file_location("bootstrap", str(bootstrap_path))

bootstrap = importlib.util.module_from_spec(spec)

assert isinstance(spec.loader, Loader)

spec.loader.exec_module(bootstrap)

bootstrap.bootstrap() # type: ignore

os.remove(bootstrap_path)

# Template the feature_store.yaml file

feature_store_yaml_path = repo_path / "feature_store.yaml"

replace_str_in_file(

feature_store_yaml_path, "project: my_project", f"project: {repo_name}"

)

# Remove the __pycache__ folder if it exists

import shutil

shutil.rmtree(repo_path / "__pycache__", ignore_errors=True)

import click

click.echo()

click.echo(

f"Creating a new Feast repository in {Style.BRIGHT + Fore.GREEN}{repo_path}{Style.RESET_ALL}."

)

click.echo()

def is_valid_name(name: str) -> bool:

"""A name should be alphanumeric values and underscores but not start with an underscore"""

return not name.startswith("_") and re.compile(r"\W+").search(name) is None

def replace_str_in_file(file_path, match_str, sub_str):

with open(file_path, "r") as f:

contents = f.read()

contents = contents.replace(match_str, sub_str)

with open(file_path, "wt") as f:

f.write(contents)

def generate_project_name() -> str:

"""Generates a unique project name"""

return f"{random.choice(adjectives)}_{random.choice(animals)}"