cargo_dependencies

Cacheable Cargo dependency set consumed by Rust targets.

Description

Runs cargo metadata --locked against the configured Cargo manifest, lowers resolved registry and git packages into cacheable Once Rust crate actions, and exposes the direct external dependencies Cargo reported for each workspace package.

Cargo.toml and Cargo.lock stay the source of truth. First-party Rust targets depend on this target and identify their Cargo package via CARGO_PKG_NAME or the cargo_package attribute.

Attributes

Attribute	Type	Required	Default	Description
manifest	string	no	Cargo.toml	Workspace-relative Cargo manifest path passed to cargo metadata --manifest-path
lockfile	string	no	Cargo.lock	Workspace-relative Cargo lockfile path included in the dependency action key
vendor_dir	string	no	third_party/rust/vendor	Workspace-relative directory containing vendored crate sources
packages	list<string>	no	[]	Optional package names to expose from this dependency set. Defaults to all resolved external packages
features	list<string>	no	[]	Cargo features passed to cargo metadata --features
all_features	bool	no	false	Pass --all-features to Cargo metadata
no_default_features	bool	no	false	Pass --no-default-features to Cargo metadata
target	string	no	host target	Rust target triple passed to Cargo as --filter-platform
dep_rustc_flags	list<string>	no	[]	Additional rustc flags applied to resolved crate builds. Panic strategy flags are stripped for procedural macro and host-tool crates so they keep the compiler's unwind strategy

Providers

The target emits rust_dependency_set.

Capabilities

Capability	Output groups
build	none

Example

[[target]]
name = "cargo_dependencies"
kind = "cargo_dependencies"
srcs = [
  "Cargo.toml",
  "Cargo.lock",
  "apps/*/Cargo.toml",
]

[target.attrs]
manifest = "Cargo.toml"
lockfile = "Cargo.lock"
vendor_dir = "third_party/rust/vendor"

[[target]]
name = "hello"
kind = "rust_binary"
deps = ["cargo_dependencies"]
srcs = ["src/**/*.rs"]

[target.attrs]
crate_name = "hello"

[target.attrs.rustc_env]
CARGO_MANIFEST_DIR = "apps/hello"
CARGO_PKG_NAME = "hello"
CARGO_PKG_VERSION = "0.0.0"