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import logging
from typing import Iterable, List, Optional, Tuple, Type
from uaclient import entitlements, lock, messages, status, util
from uaclient.api import AbstractProgress, ProgressWrapper, exceptions
from uaclient.api.api import APIEndpoint
from uaclient.api.data_types import AdditionalInfo, ErrorWarningObject
from uaclient.api.u.pro.status.enabled_services.v1 import _enabled_services
from uaclient.api.u.pro.status.is_attached.v1 import _is_attached
from uaclient.config import UAConfig
from uaclient.data_types import (
BoolDataValue,
DataObject,
Field,
StringDataValue,
data_list,
)
LOG = logging.getLogger(util.replace_top_level_logger_name(__name__))
class EnableOptions(DataObject):
fields = [
Field("service", StringDataValue, doc="Pro service to be enabled"),
Field(
"variant",
StringDataValue,
False,
doc="Optional variant of the Pro service to be enabled.",
),
Field(
"access_only",
BoolDataValue,
False,
doc=(
"If true and the target service supports it, only enable"
" access to the service (default: false)"
),
),
]
def __init__(
self,
*,
service: str,
variant: Optional[str] = None,
access_only: bool = False
):
self.service = service
self.variant = variant
self.access_only = access_only
class EnableResult(DataObject, AdditionalInfo):
fields = [
Field(
"enabled",
data_list(StringDataValue),
doc="List of services that were enabled.",
),
Field(
"disabled",
data_list(StringDataValue),
doc="List of services that were disabled.",
),
Field(
"reboot_required",
BoolDataValue,
doc=(
"True if one of the services that was enabled requires a"
" reboot."
),
),
Field(
"messages",
data_list(StringDataValue),
doc=(
"List of information message strings about the service that"
" was just enabled. Possibly translated."
),
),
]
def __init__(
self,
*,
enabled: List[str],
disabled: List[str],
reboot_required: bool,
messages: List[str]
):
self.enabled = enabled
self.disabled = disabled
self.reboot_required = reboot_required
self.messages = messages
def _auto_select_variant(
cfg: UAConfig,
progress: ProgressWrapper,
entitlement: entitlements.UAEntitlement,
available_variants: Iterable[Type[entitlements.UAEntitlement]],
access_only: bool,
) -> Tuple[entitlements.UAEntitlement, Optional[ErrorWarningObject]]:
variant = None
for v_cls in available_variants:
v = v_cls(cfg=cfg, access_only=access_only)
if (
v.applicability_status()[0]
== entitlements.ApplicabilityStatus.APPLICABLE
and v.variant_auto_select()
):
variant = v
break
if variant is None and entitlement.default_variant is not None:
variant = entitlement.default_variant(cfg=cfg, access_only=access_only)
if variant is not None:
progress.emit(
"message_operation",
[
(
util.prompt_for_confirmation,
{
"msg": messages.AUTO_SELECTING_VARIANT.format(
variant=messages.TxtColor.BOLD
+ variant.variant_name
+ messages.TxtColor.ENDC
),
},
)
],
)
warning = messages.AUTO_SELECTED_VARIANT_WARNING.format(
variant_name=variant.variant_name
)
return variant, ErrorWarningObject(
title=warning.msg,
code=warning.name,
meta={"variant_name": variant.variant_name},
)
else:
return entitlement, None
def _enabled_services_names(cfg: UAConfig) -> List[str]:
return [s.name for s in _enabled_services(cfg).enabled_services]
def enable(
options: EnableOptions, progress_object: Optional[AbstractProgress] = None
) -> EnableResult:
return _enable(options, UAConfig(), progress_object=progress_object)
def _enable(
options: EnableOptions,
cfg: UAConfig,
progress_object: Optional[AbstractProgress] = None,
) -> EnableResult:
"""
Enable a Pro service. This will automatically disable incompatible services
and enable required services that that target service depends on.
"""
progress = ProgressWrapper(progress_object)
warnings = []
if not util.we_are_currently_root():
raise exceptions.NonRootUserError()
if not _is_attached(cfg).is_attached:
raise exceptions.UnattachedError()
if options.service == "landscape":
raise exceptions.NotSupported()
enabled_services_before = _enabled_services_names(cfg)
already_enabled = next(
(
s
for s in _enabled_services(cfg).enabled_services
if s.name == options.service
and (
not options.variant
or (s.variant_enabled and s.variant_name == options.variant)
)
),
None,
)
if already_enabled:
# nothing to do
return EnableResult(
enabled=[],
disabled=[],
reboot_required=False,
messages=[],
)
entitlement = entitlements.entitlement_factory(
cfg=cfg,
name=options.service,
variant=options.variant or "",
access_only=options.access_only,
)
applicability, _ = entitlement.applicability_status()
available_variants = entitlement.variants
if all(
[
applicability == entitlements.ApplicabilityStatus.APPLICABLE,
not entitlement.is_variant,
available_variants,
]
):
entitlement, auto_select_warning = _auto_select_variant(
cfg=cfg,
progress=progress,
entitlement=entitlement,
available_variants=available_variants.values(),
access_only=options.access_only,
)
if auto_select_warning:
warnings.append(auto_select_warning)
progress.total_steps = entitlement.calculate_total_enable_steps()
success = False
fail_reason = None
try:
with lock.RetryLock(
lock_holder="u.pro.services.enable.v1",
):
success, fail_reason = entitlement.enable(progress)
except Exception as e:
lock.clear_lock_file_if_present()
raise e
if not success:
if fail_reason is not None and fail_reason.message is not None:
reason = fail_reason.message
else:
reason = messages.GENERIC_UNKNOWN_ISSUE
raise exceptions.EntitlementNotEnabledError(
service=options.service, reason=reason
)
enabled_services_after = _enabled_services_names(cfg)
post_enable_messages = [
msg
for msg in (entitlement.messaging.get("post_enable", []) or [])
if isinstance(msg, str)
]
status.status(cfg=cfg) # Update the status cache
progress.finish()
result = EnableResult(
enabled=sorted(
list(
set(enabled_services_after).difference(
set(enabled_services_before)
)
)
),
disabled=sorted(
list(
set(enabled_services_before).difference(
set(enabled_services_after)
)
)
),
reboot_required=entitlement._check_for_reboot(),
messages=post_enable_messages,
)
result.warnings = warnings
return result
endpoint = APIEndpoint(
version="v1",
name="EnableService",
fn=_enable,
options_cls=EnableOptions,
supports_progress=True,
)
_doc = {
"introduced_in": "32",
"requires_network": True,
"example_python": """
from uaclient.api.u.pro.services.enable.v1 import enable, EnableOptions
result = enable(EnableOptions(service="usg"))
""",
"result_class": EnableResult,
"exceptions": [
(exceptions.NonRootUserError, "When called as non-root user"),
(
exceptions.UnattachedError,
(
"When called on a machine that is not attached to a Pro"
" subscription"
),
),
(
exceptions.NotSupported,
(
"When called for a service that doesn't support being enabled"
" via API (currently only Landscape)"
),
),
(
exceptions.EntitlementNotFoundError,
(
"When the service argument is not a valid Pro service name or"
" if the variant is not a valid variant of the target service"
),
),
(
exceptions.LockHeldError,
"When another Ubuntu Pro related operation is in progress",
),
(
exceptions.EntitlementNotEnabledError,
"When the service fails to enable",
),
],
"example_cli": "pro api u.pro.services.enable.v1 --args service=usg",
"example_json": """
{
"disabled": [],
"enabled": [
"usg"
],
"messages": [],
"reboot_required": false
}
""",
}