#
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# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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
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# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations
import shlex
from typing import TYPE_CHECKING, Sequence
from google.api_core.exceptions import AlreadyExists
from google.api_core.gapic_v1.method import DEFAULT, _MethodDefault
from google.cloud.orchestration.airflow.service_v1 import ImageVersion
from google.cloud.orchestration.airflow.service_v1.types import Environment, ExecuteAirflowCommandResponse
from airflow.configuration import conf
from airflow.exceptions import AirflowException
from airflow.providers.google.cloud.hooks.cloud_composer import CloudComposerHook
from airflow.providers.google.cloud.links.base import BaseGoogleLink
from airflow.providers.google.cloud.operators.cloud_base import GoogleCloudBaseOperator
from airflow.providers.google.cloud.triggers.cloud_composer import (
CloudComposerAirflowCLICommandTrigger,
CloudComposerExecutionTrigger,
)
from airflow.providers.google.common.consts import GOOGLE_DEFAULT_DEFERRABLE_METHOD_NAME
if TYPE_CHECKING:
from google.api_core.retry import Retry
from google.protobuf.field_mask_pb2 import FieldMask
from airflow.utils.context import Context
[docs]CLOUD_COMPOSER_BASE_LINK = "https://console.cloud.google.com/composer/environments"
[docs]CLOUD_COMPOSER_DETAILS_LINK = (
CLOUD_COMPOSER_BASE_LINK + "/detail/{region}/{environment_id}/monitoring?project={project_id}"
)
[docs]CLOUD_COMPOSER_ENVIRONMENTS_LINK = CLOUD_COMPOSER_BASE_LINK + "?project={project_id}"
[docs]class CloudComposerEnvironmentLink(BaseGoogleLink):
"""Helper class for constructing Cloud Composer Environment Link."""
[docs] name = "Cloud Composer Environment"
@staticmethod
[docs] def persist(
operator_instance: (
CloudComposerCreateEnvironmentOperator
| CloudComposerUpdateEnvironmentOperator
| CloudComposerGetEnvironmentOperator
),
context: Context,
) -> None:
operator_instance.xcom_push(
context,
key=CloudComposerEnvironmentLink.key,
value={
"project_id": operator_instance.project_id,
"region": operator_instance.region,
"environment_id": operator_instance.environment_id,
},
)
[docs]class CloudComposerEnvironmentsLink(BaseGoogleLink):
"""Helper class for constructing Cloud Composer Environment Link."""
[docs] name = "Cloud Composer Environment List"
@staticmethod
[docs] def persist(operator_instance: CloudComposerListEnvironmentsOperator, context: Context) -> None:
operator_instance.xcom_push(
context,
key=CloudComposerEnvironmentsLink.key,
value={
"project_id": operator_instance.project_id,
},
)
[docs]class CloudComposerCreateEnvironmentOperator(GoogleCloudBaseOperator):
"""
Create a new environment.
:param project_id: Required. The ID of the Google Cloud project that the service belongs to.
:param region: Required. The ID of the Google Cloud region that the service belongs to.
:param environment_id: Required. The ID of the Google Cloud environment that the service belongs to.
:param environment: The environment to create.
:param gcp_conn_id:
:param impersonation_chain: Optional service account to impersonate using short-term
credentials, or chained list of accounts required to get the access_token
of the last account in the list, which will be impersonated in the request.
If set as a string, the account must grant the originating account
the Service Account Token Creator IAM role.
If set as a sequence, the identities from the list must grant
Service Account Token Creator IAM role to the directly preceding identity, with first
account from the list granting this role to the originating account (templated).
:param retry: Designation of what errors, if any, should be retried.
:param timeout: The timeout for this request.
:param metadata: Strings which should be sent along with the request as metadata.
:param deferrable: Run operator in the deferrable mode
:param pooling_period_seconds: Optional: Control the rate of the poll for the result of deferrable run.
By default, the trigger will poll every 30 seconds.
"""
[docs] template_fields = (
"project_id",
"region",
"environment_id",
"environment",
"impersonation_chain",
)
def __init__(
self,
*,
project_id: str,
region: str,
environment_id: str,
environment: Environment | dict,
gcp_conn_id: str = "google_cloud_default",
impersonation_chain: str | Sequence[str] | None = None,
retry: Retry | _MethodDefault = DEFAULT,
timeout: float | None = None,
metadata: Sequence[tuple[str, str]] = (),
deferrable: bool = conf.getboolean("operators", "default_deferrable", fallback=False),
pooling_period_seconds: int = 30,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.project_id = project_id
self.region = region
self.environment_id = environment_id
self.environment = environment
self.retry = retry
self.timeout = timeout
self.metadata = metadata
self.gcp_conn_id = gcp_conn_id
self.impersonation_chain = impersonation_chain
self.deferrable = deferrable
self.pooling_period_seconds = pooling_period_seconds
[docs] def execute(self, context: Context):
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
name = hook.get_environment_name(self.project_id, self.region, self.environment_id)
if isinstance(self.environment, Environment):
self.environment.name = name
else:
self.environment["name"] = name
CloudComposerEnvironmentLink.persist(operator_instance=self, context=context)
try:
result = hook.create_environment(
project_id=self.project_id,
region=self.region,
environment=self.environment,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
context["ti"].xcom_push(key="operation_id", value=result.operation.name)
if not self.deferrable:
environment = hook.wait_for_operation(timeout=self.timeout, operation=result)
return Environment.to_dict(environment)
else:
self.defer(
trigger=CloudComposerExecutionTrigger(
project_id=self.project_id,
region=self.region,
operation_name=result.operation.name,
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
pooling_period_seconds=self.pooling_period_seconds,
),
method_name=GOOGLE_DEFAULT_DEFERRABLE_METHOD_NAME,
)
except AlreadyExists:
environment = hook.get_environment(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
return Environment.to_dict(environment)
[docs] def execute_complete(self, context: Context, event: dict):
if event["operation_done"]:
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
env = hook.get_environment(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
return Environment.to_dict(env)
else:
raise AirflowException(f"Unexpected error in the operation: {event['operation_name']}")
[docs]class CloudComposerDeleteEnvironmentOperator(GoogleCloudBaseOperator):
"""
Delete an environment.
:param project_id: Required. The ID of the Google Cloud project that the service belongs to.
:param region: Required. The ID of the Google Cloud region that the service belongs to.
:param environment_id: Required. The ID of the Google Cloud environment that the service belongs to.
:param retry: Designation of what errors, if any, should be retried.
:param timeout: The timeout for this request.
:param metadata: Strings which should be sent along with the request as metadata.
:param gcp_conn_id:
:param impersonation_chain: Optional service account to impersonate using short-term
credentials, or chained list of accounts required to get the access_token
of the last account in the list, which will be impersonated in the request.
If set as a string, the account must grant the originating account
the Service Account Token Creator IAM role.
If set as a sequence, the identities from the list must grant
Service Account Token Creator IAM role to the directly preceding identity, with first
account from the list granting this role to the originating account (templated).
:param deferrable: Run operator in the deferrable mode
:param pooling_period_seconds: Optional: Control the rate of the poll for the result of deferrable run.
By default, the trigger will poll every 30 seconds.
"""
[docs] template_fields = (
"project_id",
"region",
"environment_id",
"impersonation_chain",
)
def __init__(
self,
*,
project_id: str,
region: str,
environment_id: str,
retry: Retry | _MethodDefault = DEFAULT,
timeout: float | None = None,
metadata: Sequence[tuple[str, str]] = (),
gcp_conn_id: str = "google_cloud_default",
impersonation_chain: str | Sequence[str] | None = None,
deferrable: bool = conf.getboolean("operators", "default_deferrable", fallback=False),
pooling_period_seconds: int = 30,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.project_id = project_id
self.region = region
self.environment_id = environment_id
self.retry = retry
self.timeout = timeout
self.metadata = metadata
self.gcp_conn_id = gcp_conn_id
self.impersonation_chain = impersonation_chain
self.deferrable = deferrable
self.pooling_period_seconds = pooling_period_seconds
[docs] def execute(self, context: Context):
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
result = hook.delete_environment(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
if not self.deferrable:
hook.wait_for_operation(timeout=self.timeout, operation=result)
else:
self.defer(
trigger=CloudComposerExecutionTrigger(
project_id=self.project_id,
region=self.region,
operation_name=result.operation.name,
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
pooling_period_seconds=self.pooling_period_seconds,
),
method_name=GOOGLE_DEFAULT_DEFERRABLE_METHOD_NAME,
)
[docs] def execute_complete(self, context: Context, event: dict):
pass
[docs]class CloudComposerGetEnvironmentOperator(GoogleCloudBaseOperator):
"""
Get an existing environment.
:param project_id: Required. The ID of the Google Cloud project that the service belongs to.
:param region: Required. The ID of the Google Cloud region that the service belongs to.
:param environment_id: Required. The ID of the Google Cloud environment that the service belongs to.
:param retry: Designation of what errors, if any, should be retried.
:param timeout: The timeout for this request.
:param metadata: Strings which should be sent along with the request as metadata.
:param gcp_conn_id:
:param impersonation_chain: Optional service account to impersonate using short-term
credentials, or chained list of accounts required to get the access_token
of the last account in the list, which will be impersonated in the request.
If set as a string, the account must grant the originating account
the Service Account Token Creator IAM role.
If set as a sequence, the identities from the list must grant
Service Account Token Creator IAM role to the directly preceding identity, with first
account from the list granting this role to the originating account (templated).
"""
[docs] template_fields = (
"project_id",
"region",
"environment_id",
"impersonation_chain",
)
def __init__(
self,
*,
project_id: str,
region: str,
environment_id: str,
retry: Retry | _MethodDefault = DEFAULT,
timeout: float | None = None,
metadata: Sequence[tuple[str, str]] = (),
gcp_conn_id: str = "google_cloud_default",
impersonation_chain: str | Sequence[str] | None = None,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.project_id = project_id
self.region = region
self.environment_id = environment_id
self.retry = retry
self.timeout = timeout
self.metadata = metadata
self.gcp_conn_id = gcp_conn_id
self.impersonation_chain = impersonation_chain
[docs] def execute(self, context: Context):
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
result = hook.get_environment(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
CloudComposerEnvironmentLink.persist(operator_instance=self, context=context)
return Environment.to_dict(result)
[docs]class CloudComposerListEnvironmentsOperator(GoogleCloudBaseOperator):
"""
List environments.
:param project_id: Required. The ID of the Google Cloud project that the service belongs to.
:param region: Required. The ID of the Google Cloud region that the service belongs to.
:param page_size: The maximum number of environments to return.
:param page_token: The next_page_token value returned from a previous List
request, if any.
:param retry: Designation of what errors, if any, should be retried.
:param timeout: The timeout for this request.
:param metadata: Strings which should be sent along with the request as metadata.
:param gcp_conn_id:
:param impersonation_chain: Optional service account to impersonate using short-term
credentials, or chained list of accounts required to get the access_token
of the last account in the list, which will be impersonated in the request.
If set as a string, the account must grant the originating account
the Service Account Token Creator IAM role.
If set as a sequence, the identities from the list must grant
Service Account Token Creator IAM role to the directly preceding identity, with first
account from the list granting this role to the originating account (templated).
"""
[docs] template_fields = (
"project_id",
"region",
"impersonation_chain",
)
def __init__(
self,
*,
project_id: str,
region: str,
page_size: int | None = None,
page_token: str | None = None,
retry: Retry | _MethodDefault = DEFAULT,
timeout: float | None = None,
metadata: Sequence[tuple[str, str]] = (),
gcp_conn_id: str = "google_cloud_default",
impersonation_chain: str | Sequence[str] | None = None,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.project_id = project_id
self.region = region
self.page_size = page_size
self.page_token = page_token
self.retry = retry
self.timeout = timeout
self.metadata = metadata
self.gcp_conn_id = gcp_conn_id
self.impersonation_chain = impersonation_chain
[docs] def execute(self, context: Context):
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
CloudComposerEnvironmentsLink.persist(operator_instance=self, context=context)
result = hook.list_environments(
project_id=self.project_id,
region=self.region,
page_size=self.page_size,
page_token=self.page_token,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
return [Environment.to_dict(env) for env in result]
[docs]class CloudComposerUpdateEnvironmentOperator(GoogleCloudBaseOperator):
r"""
Update an environment.
:param project_id: Required. The ID of the Google Cloud project that the service belongs to.
:param region: Required. The ID of the Google Cloud region that the service belongs to.
:param environment_id: Required. The ID of the Google Cloud environment that the service belongs to.
:param environment: A patch environment. Fields specified by the ``updateMask`` will be copied from the
patch environment into the environment under update.
:param update_mask: Required. A comma-separated list of paths, relative to ``Environment``, of fields to
update. If a dict is provided, it must be of the same form as the protobuf message
:class:`~google.protobuf.field_mask_pb2.FieldMask`
:param retry: Designation of what errors, if any, should be retried.
:param timeout: The timeout for this request.
:param metadata: Strings which should be sent along with the request as metadata.
:param gcp_conn_id:
:param impersonation_chain: Optional service account to impersonate using short-term
credentials, or chained list of accounts required to get the access_token
of the last account in the list, which will be impersonated in the request.
If set as a string, the account must grant the originating account
the Service Account Token Creator IAM role.
If set as a sequence, the identities from the list must grant
Service Account Token Creator IAM role to the directly preceding identity, with first
account from the list granting this role to the originating account (templated).
:param deferrable: Run operator in the deferrable mode
:param pooling_period_seconds: Optional: Control the rate of the poll for the result of deferrable run.
By default, the trigger will poll every 30 seconds.
"""
[docs] template_fields = (
"project_id",
"region",
"environment_id",
"impersonation_chain",
)
def __init__(
self,
*,
project_id: str,
region: str,
environment_id: str,
environment: dict | Environment,
update_mask: dict | FieldMask,
retry: Retry | _MethodDefault = DEFAULT,
timeout: float | None = None,
metadata: Sequence[tuple[str, str]] = (),
gcp_conn_id: str = "google_cloud_default",
impersonation_chain: str | Sequence[str] | None = None,
deferrable: bool = conf.getboolean("operators", "default_deferrable", fallback=False),
pooling_period_seconds: int = 30,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.project_id = project_id
self.region = region
self.environment_id = environment_id
self.environment = environment
self.update_mask = update_mask
self.retry = retry
self.timeout = timeout
self.metadata = metadata
self.gcp_conn_id = gcp_conn_id
self.impersonation_chain = impersonation_chain
self.deferrable = deferrable
self.pooling_period_seconds = pooling_period_seconds
[docs] def execute(self, context: Context):
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
result = hook.update_environment(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
environment=self.environment,
update_mask=self.update_mask,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
CloudComposerEnvironmentLink.persist(operator_instance=self, context=context)
if not self.deferrable:
environment = hook.wait_for_operation(timeout=self.timeout, operation=result)
return Environment.to_dict(environment)
else:
self.defer(
trigger=CloudComposerExecutionTrigger(
project_id=self.project_id,
region=self.region,
operation_name=result.operation.name,
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
pooling_period_seconds=self.pooling_period_seconds,
),
method_name=GOOGLE_DEFAULT_DEFERRABLE_METHOD_NAME,
)
[docs] def execute_complete(self, context: Context, event: dict):
if event["operation_done"]:
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
env = hook.get_environment(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
return Environment.to_dict(env)
else:
raise AirflowException(f"Unexpected error in the operation: {event['operation_name']}")
[docs]class CloudComposerListImageVersionsOperator(GoogleCloudBaseOperator):
"""
List ImageVersions for provided location.
:param request: The request object. List ImageVersions in a project and location.
:param retry: Designation of what errors, if any, should be retried.
:param timeout: The timeout for this request.
:param metadata: Strings which should be sent along with the request as metadata.
:param gcp_conn_id:
:param impersonation_chain: Optional service account to impersonate using short-term
credentials, or chained list of accounts required to get the access_token
of the last account in the list, which will be impersonated in the request.
If set as a string, the account must grant the originating account
the Service Account Token Creator IAM role.
If set as a sequence, the identities from the list must grant
Service Account Token Creator IAM role to the directly preceding identity, with first
account from the list granting this role to the originating account (templated).
"""
[docs] template_fields = (
"project_id",
"region",
"impersonation_chain",
)
def __init__(
self,
*,
project_id: str,
region: str,
page_size: int | None = None,
page_token: str | None = None,
include_past_releases: bool = False,
retry: Retry | _MethodDefault = DEFAULT,
timeout: float | None = None,
metadata: Sequence[tuple[str, str]] = (),
gcp_conn_id: str = "google_cloud_default",
impersonation_chain: str | Sequence[str] | None = None,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.project_id = project_id
self.region = region
self.page_size = page_size
self.page_token = page_token
self.include_past_releases = include_past_releases
self.retry = retry
self.timeout = timeout
self.metadata = metadata
self.gcp_conn_id = gcp_conn_id
self.impersonation_chain = impersonation_chain
[docs] def execute(self, context: Context):
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
result = hook.list_image_versions(
project_id=self.project_id,
region=self.region,
page_size=self.page_size,
page_token=self.page_token,
include_past_releases=self.include_past_releases,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
return [ImageVersion.to_dict(image) for image in result]
[docs]class CloudComposerRunAirflowCLICommandOperator(GoogleCloudBaseOperator):
"""
Run Airflow command for provided Composer environment.
:param project_id: The ID of the Google Cloud project that the service belongs to.
:param region: The ID of the Google Cloud region that the service belongs to.
:param environment_id: The ID of the Google Cloud environment that the service belongs to.
:param command: Airflow command.
:param retry: Designation of what errors, if any, should be retried.
:param timeout: The timeout for this request.
:param metadata: Strings which should be sent along with the request as metadata.
:param gcp_conn_id: The connection ID used to connect to Google Cloud Platform.
:param impersonation_chain: Optional service account to impersonate using short-term
credentials, or chained list of accounts required to get the access_token
of the last account in the list, which will be impersonated in the request.
If set as a string, the account must grant the originating account
the Service Account Token Creator IAM role.
If set as a sequence, the identities from the list must grant
Service Account Token Creator IAM role to the directly preceding identity, with first
account from the list granting this role to the originating account (templated).
:param deferrable: Run operator in the deferrable mode
:param poll_interval: Optional: Control the rate of the poll for the result of deferrable run.
By default, the trigger will poll every 10 seconds.
"""
[docs] template_fields = (
"project_id",
"region",
"environment_id",
"command",
"impersonation_chain",
)
def __init__(
self,
*,
project_id: str,
region: str,
environment_id: str,
command: str,
retry: Retry | _MethodDefault = DEFAULT,
timeout: float | None = None,
metadata: Sequence[tuple[str, str]] = (),
gcp_conn_id: str = "google_cloud_default",
impersonation_chain: str | Sequence[str] | None = None,
deferrable: bool = conf.getboolean("operators", "default_deferrable", fallback=False),
poll_interval: int = 10,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.project_id = project_id
self.region = region
self.environment_id = environment_id
self.command = command
self.retry = retry
self.timeout = timeout
self.metadata = metadata
self.gcp_conn_id = gcp_conn_id
self.impersonation_chain = impersonation_chain
self.deferrable = deferrable
self.poll_interval = poll_interval
[docs] def execute(self, context: Context):
hook = CloudComposerHook(
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
)
self.log.info("Executing the command: [ airflow %s ]...", self.command)
cmd, subcommand, parameters = self._parse_cmd_to_args(self.command)
execution_cmd_info = hook.execute_airflow_command(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
command=cmd,
subcommand=subcommand,
parameters=parameters,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
)
execution_cmd_info_dict = ExecuteAirflowCommandResponse.to_dict(execution_cmd_info)
self.log.info("Command has been started. execution_id=%s", execution_cmd_info_dict["execution_id"])
if self.deferrable:
self.defer(
trigger=CloudComposerAirflowCLICommandTrigger(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
execution_cmd_info=execution_cmd_info_dict,
gcp_conn_id=self.gcp_conn_id,
impersonation_chain=self.impersonation_chain,
poll_interval=self.poll_interval,
),
method_name=GOOGLE_DEFAULT_DEFERRABLE_METHOD_NAME,
)
return
result = hook.wait_command_execution_result(
project_id=self.project_id,
region=self.region,
environment_id=self.environment_id,
execution_cmd_info=execution_cmd_info_dict,
retry=self.retry,
timeout=self.timeout,
metadata=self.metadata,
poll_interval=self.poll_interval,
)
result_str = self._merge_cmd_output_result(result)
self.log.info("Command execution result:\n%s", result_str)
return result
[docs] def execute_complete(self, context: Context, event: dict) -> dict:
if event and event["status"] == "error":
raise AirflowException(event["message"])
result: dict = event["result"]
result_str = self._merge_cmd_output_result(result)
self.log.info("Command execution result:\n%s", result_str)
return result
def _parse_cmd_to_args(self, cmd: str) -> tuple:
"""Parse user command to command, subcommand and parameters."""
cmd_dict = shlex.split(cmd)
if not cmd_dict:
raise AirflowException("The provided command is empty.")
command = cmd_dict[0] if len(cmd_dict) >= 1 else None
subcommand = cmd_dict[1] if len(cmd_dict) >= 2 else None
parameters = cmd_dict[2:] if len(cmd_dict) >= 3 else None
return command, subcommand, parameters
def _merge_cmd_output_result(self, result) -> str:
"""Merge output to one string."""
result_str = "\n".join(line_dict["content"] for line_dict in result["output"])
return result_str