Manage dependencies

README.md

@@ -84,7 +84,14 @@ To start using `astro`:
 
     Alternatively, you can add `astro-projects` to your `requirements.txt` file.
 
-2. Set the following environment variable so that `astro` can pass table objects between tasks:
+
+2. Installing `astro` with extras(i.e., gcp, snowflake, postgres)
+
+    ```shell script
+    pip install astro-projects[google,snowflake,postgres]
+    ```
+
+3. Set the following environment variable so that `astro` can pass table objects between tasks:
 
     ```shell script
     AIRFLOW__CORE__ENABLE_XCOM_PICKLING=True

pyproject.toml

@@ -16,17 +16,10 @@ license = {file = "LICENSE"}
 requires-python = ">=3.7"
 dependencies = [
     "apache-airflow >=2.0",
-    "apache-airflow-providers-postgres",
-    "apache-airflow-providers-snowflake",
-    "apache-airflow-providers-google",
     "python-frontmatter",
     "pandas >=1.3.4",
-    "s3fs",
-    "snowflake-sqlalchemy ==1.2.0",
-    "snowflake-connector-python[pandas]",
-    "smart-open[all]>=5.2.1",
     "SQLAlchemy==1.3.24",
-    "sqlalchemy-bigquery==1.3.0",
+    "apache-airflow-providers-postgres",
     "markupsafe>=1.1.1,<2.1.0"
 ]
 
@@ -47,6 +40,46 @@ tests = [
     "pytest >=6.0",
     "pytest-dotenv",
     "requests-mock",
+    "apache-airflow-providers-google",
+    "sqlalchemy-bigquery==1.3.0",
+    "smart-open[all]>=5.2.1",
+    "apache-airflow-providers-snowflake",
+    "snowflake-sqlalchemy ==1.2.0",
+    "snowflake-connector-python[pandas]",
+    "apache-airflow-providers-postgres",
+    "s3fs",
+    "smart-open[s3]>=5.2.1",
+]
+google = [
+    "apache-airflow-providers-google",
+    "sqlalchemy-bigquery==1.3.0",
+    "smart-open[gcs]>=5.2.1",
+]
+snowflake = [
+    "apache-airflow-providers-snowflake",
+    "snowflake-sqlalchemy ==1.2.0",
+    "snowflake-connector-python[pandas]",
+]
+postgres = [
+    "apache-airflow-providers-postgres",
+]
+amazon = [
+    "s3fs",
+    "smart-open[s3]>=5.2.1",
+]
+all = [
+    "pytest >=6.0",
+    "pytest-dotenv",
+    "requests-mock",
+    "apache-airflow-providers-google",
+    "sqlalchemy-bigquery==1.3.0",
+    "smart-open[all]>=5.2.1",
+    "apache-airflow-providers-snowflake",
+    "snowflake-sqlalchemy ==1.2.0",
+    "snowflake-connector-python[pandas]",
+    "apache-airflow-providers-postgres",
+    "s3fs",
+    "smart-open[s3]>=5.2.1",
 ]
 
 [project.urls]

src/astro/constants.py

@@ -1 +1,2 @@
 DEFAULT_CHUNK_SIZE = 1000000
+PYPI_PROJECT_NAME = "astro-projects"

src/astro/sql/operators/agnostic_save_file.py

@@ -22,14 +22,12 @@
 import pandas as pd
 from airflow.hooks.base import BaseHook
 from airflow.models import BaseOperator, DagRun, TaskInstance
-from airflow.providers.google.cloud.hooks.bigquery import BigQueryHook
-from airflow.providers.postgres.hooks.postgres import PostgresHook
-from google.cloud.storage import Client
 from smart_open import open
 
 from astro.sql.operators.temp_hooks import TempSnowflakeHook
 from astro.sql.table import Table
 from astro.utils.cloud_storage_creds import gcs_client, s3fs_creds
+from astro.utils.dependencies import BigQueryHook, PostgresHook
 from astro.utils.schema_util import get_table_name
 from astro.utils.task_id_helper import get_task_id
 

src/astro/sql/operators/sql_dataframe.py

@@ -19,11 +19,10 @@
 import pandas as pd
 from airflow.decorators.base import DecoratedOperator
 from airflow.hooks.base import BaseHook
-from airflow.providers.postgres.hooks.postgres import PostgresHook
-from airflow.providers.snowflake.hooks.snowflake import SnowflakeHook
 
 from astro.constants import DEFAULT_CHUNK_SIZE
 from astro.sql.table import Table, TempTable, create_table_name
+from astro.utils.dependencies import PostgresHook, SnowflakeHook
 from astro.utils.load_dataframe import move_dataframe_to_sql
 from astro.utils.schema_util import get_schema
 

src/astro/sql/operators/sql_decorator.py

@@ -21,15 +21,13 @@
 from airflow.decorators.base import DecoratedOperator, task_decorator_factory
 from airflow.hooks.base import BaseHook
 from airflow.models import DagRun, TaskInstance
-from airflow.providers.google.cloud.hooks.bigquery import BigQueryHook
-from airflow.providers.postgres.hooks.postgres import PostgresHook
-from airflow.providers.snowflake.hooks.snowflake import SnowflakeHook
 from airflow.utils.db import provide_session
 from sqlalchemy import text
 from sqlalchemy.sql.functions import Function
 
 from astro.sql.table import Table, create_table_name
 from astro.utils import postgres_transform, snowflake_transform
+from astro.utils.dependencies import BigQueryHook, PostgresHook, SnowflakeHook
 from astro.utils.load_dataframe import move_dataframe_to_sql
 from astro.utils.schema_util import get_schema, set_schema_query
 

src/astro/sql/operators/temp_hooks.py

@@ -15,8 +15,7 @@
 """
 from urllib.parse import quote_plus
 
-from airflow.providers.postgres.hooks.postgres import PostgresHook
-from airflow.providers.snowflake.hooks.snowflake import SnowflakeHook
+from astro.utils.dependencies import SnowflakeHook
 
 
 class TempSnowflakeHook(SnowflakeHook):

src/astro/utils/bigquery_merge_func.py

@@ -13,9 +13,6 @@
 See the License for the specific language governing permissions and
 limitations under the License.
 """
-from airflow.providers.postgres.hooks.postgres import PostgresHook
-from psycopg2 import sql
-
 from astro.sql.table import Table
 
 

src/astro/utils/dependencies.py

@@ -0,0 +1,51 @@
+"""
+Copyright Astronomer, Inc.
+
+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.
+"""
+from astro import constants
+
+
+class MissingPackage(object):
+    def __init__(self, module_name, related_extras):
+        self.module_name = module_name
+        self.related_extras = related_extras
+
+    def __getattr__(self, item):
+        raise RuntimeError(
+            f"Error loading the module {self.module_name},"
+            f" please make sure all the dependencies are installed."
+            f" try - pip install {constants.PYPI_PROJECT_NAME}[{self.related_extras}]"
+        )
+
+
+try:
+    from airflow.providers.google.cloud.hooks.bigquery import BigQueryHook
+except ModuleNotFoundError:
+    BigQueryHook = MissingPackage(
+        "airflow.providers.google.cloud.hooks.bigquery", "google"
+    )
+
+try:
+    from airflow.providers.postgres.hooks.postgres import PostgresHook
+except ModuleNotFoundError:
+    PostgresHook = MissingPackage(
+        "airflow.providers.postgres.hooks.postgres", "postgres"
+    )
+
+try:
+    from airflow.providers.snowflake.hooks.snowflake import SnowflakeHook
+except ModuleNotFoundError:
+    SnowflakeHook = MissingPackage(
+        "airflow.providers.snowflake.hooks.snowflake", "snowflake"
+    )

src/astro/utils/load_dataframe.py

@@ -15,13 +15,12 @@
 """
 from typing import Optional, Union
 
-from airflow.providers.google.cloud.hooks.bigquery import BigQueryHook
-from airflow.providers.postgres.hooks.postgres import PostgresHook
 from pandas import DataFrame
 from pandas.io.sql import SQLDatabase
 from snowflake.connector import pandas_tools
 
 from astro.sql.operators.temp_hooks import TempSnowflakeHook
+from astro.utils.dependencies import BigQueryHook, PostgresHook
 from astro.utils.schema_util import set_schema_query
 
 

src/astro/utils/postgres_merge_func.py

@@ -13,10 +13,10 @@
 See the License for the specific language governing permissions and
 limitations under the License.
 """
-from airflow.providers.postgres.hooks.postgres import PostgresHook
 from psycopg2 import sql
 
 from astro.sql.table import Table
+from astro.utils.dependencies import PostgresHook
 
 
 def postgres_merge_func(

src/astro/utils/postgres_transform.py

@@ -15,8 +15,10 @@
 """
 
 from airflow.providers.postgres.hooks.postgres import PostgresHook
+from psycopg2.extensions import AsIs
 
 from astro.sql.table import Table
+from astro.utils.dependencies import PostgresHook
 
 
 def add_templates_to_context(parameters, context):