cargo::core::compiler

# Struct BuildScripts

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    pub struct BuildScripts {
        pub to_link: Vec<(PackageId, Metadata)>,
        seen_to_link: HashSet<(PackageId, Metadata)>,
        pub plugins: BTreeSet<(PackageId, Metadata)>,
    }

Expand description

Linking information for a `Unit`.

See `build_map` for more details.

## Fields§

§`to_link: Vec<(PackageId, Metadata)>`

List of build script outputs this Unit needs to include for linking. Each element is an index into `BuildScriptOutputs`.

Cargo will use this `to_link` vector to add `-L` flags to compiles as we propagate them upwards towards the final build. Note, however, that we need to preserve the ordering of `to_link` to be topologically sorted. This will ensure that build scripts which print their paths properly will correctly pick up the files they generated (if there are duplicates elsewhere).

To preserve this ordering, the (id, metadata) is stored in two places, once in the `Vec` and once in `seen_to_link` for a fast lookup. We maintain this as we’re building interactively below to ensure that the memory usage here doesn’t blow up too much.

For more information, see #2354.

§`seen_to_link: HashSet<(PackageId, Metadata)>`

This is only used while constructing `to_link` to avoid duplicates.

§`plugins: BTreeSet<(PackageId, Metadata)>`

Host-only dependencies that have build scripts. Each element is an index into `BuildScriptOutputs`.

This is the set of transitive dependencies that are host-only (proc-macro, plugin, build-dependency) that contain a build script. Any `BuildOutput::library_paths` path relative to `target` will be added to LD_LIBRARY_PATH so that the compiler can find any dynamic libraries a build script may have generated.

## Trait Implementations§

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### impl Default for BuildScripts

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#### fn default() -> BuildScripts

Returns the “default value” for a type. Read more

## Auto Trait Implementations§

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### impl Freeze for BuildScripts

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### impl RefUnwindSafe for BuildScripts

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### impl Send for BuildScripts

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### impl Sync for BuildScripts

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### impl Unpin for BuildScripts

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### impl UnwindSafe for BuildScripts

## Blanket Implementations§

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

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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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

Mutably borrows from an owned value. Read more
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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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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> IntoEither for T

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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> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 96 bytes