Source code for airflow.providers.microsoft.azure.fs.adls

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from __future__ import annotations

from typing import TYPE_CHECKING, Any

from azure.identity import ClientSecretCredential

from airflow.hooks.base import BaseHook
from airflow.providers.microsoft.azure.utils import get_field, parse_blob_account_url

if TYPE_CHECKING:
    from fsspec import AbstractFileSystem

[docs]schemes = ["abfs", "abfss", "adl"]


[docs]def get_fs(conn_id: str | None, storage_options: dict[str, Any] | None = None) -> AbstractFileSystem:
    from adlfs import AzureBlobFileSystem

    if conn_id is None:
        return AzureBlobFileSystem()

    conn = BaseHook.get_connection(conn_id)
    extras = conn.extra_dejson
    conn_type = conn.conn_type or "azure_data_lake"

    # connection string always overrides everything else
    connection_string = get_field(
        conn_id=conn_id, conn_type=conn_type, extras=extras, field_name="connection_string"
    )

    if connection_string:
        return AzureBlobFileSystem(connection_string=connection_string)

    options: dict[str, Any] = {
        "account_url": parse_blob_account_url(conn.host, conn.login),
    }

    # mirror handling of custom field "client_secret_auth_config" from extras. Ignore if missing as AzureBlobFileSystem can handle.
    tenant_id = get_field(conn_id=conn_id, conn_type=conn_type, extras=extras, field_name="tenant_id")
    login = conn.login or ""
    password = conn.password or ""
    # assumption (from WasbHook) that if tenant_id is set, we want service principal connection
    if tenant_id:
        client_secret_auth_config = get_field(
            conn_id=conn_id, conn_type=conn_type, extras=extras, field_name="client_secret_auth_config"
        )
        if login:
            options["client_id"] = login
        if password:
            options["client_secret"] = password
        if client_secret_auth_config and login and password:
            options["credential"] = ClientSecretCredential(
                tenant_id=tenant_id, client_id=login, client_secret=password, **client_secret_auth_config
            )

    # if not service principal, then password is taken to be account admin key
    if tenant_id is None and password:
        options["account_key"] = password

    # now take any fields from extras and overlay on these
    # add empty field to remove defaults
    fields = [
        "account_name",
        "account_key",
        "sas_token",
        "tenant_id",
        "managed_identity_client_id",
        "workload_identity_client_id",
        "workload_identity_tenant_id",
        "anon",
    ]
    for field in fields:
        value = get_field(conn_id=conn_id, conn_type=conn_type, extras=extras, field_name=field)
        if value is not None:
            if value == "":
                options.pop(field, "")
            else:
                options[field] = value

    options.update(storage_options or {})

    return AzureBlobFileSystem(**options)