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LeaseGuard

magi::updater

Struct LeaseGuard 

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pub struct LeaseGuard { /* private fields */ }
Expand description

Held by hand_over for as long as it runs; removes the lease on drop.

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impl LeaseGuard

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pub fn enter(home: &Path, parked_run: Option<String>) -> Self

Record that hand_over has been entered.

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pub fn enter_parking(home: &Path) -> (Self, bool)

Enter the handover: write the lease and the parking stage as one step under the progress lock, so a failing upgrade request (fail_progress) or a fresh one (write_progress) cannot land between the two and leave a record that is newer than the lease. None for the stage means upgrade.json was unreadable (the lease is still written).

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pub fn beat(&mut self)

Say it is still alive.

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impl Debug for LeaseGuard

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Drop for LeaseGuard

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fn drop(&mut self)

Executes the destructor for this type. Read more
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fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)
Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> PolicyExt for T
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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Sized + Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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type Error = !

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type Error = <U as TryFrom<T>>::Error

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