Struct ProjectEnvironment 

pub struct ProjectEnvironment { /* private fields */ }

Represents a generic Rust/Cargo project’s environment.

Implementations

impl ProjectEnvironment

pub fn new<T, U>(manifest_dir: T, crate_name: U) -> ProjectEnvironment

where T: Into<PathBuf>, U: Into<String>,

Creates a new instance using the given manifest dir and crate name.

pub fn new_from_env() -> Option<ProjectEnvironment>

Creates a new instance using the the CARGO_MANIFEST_DIR and CARGO_CRATE_NAME environment variables.

pub fn determine_ethers_crates( &self, ) -> Option<HashMap<EthersCrate, &'static str>>

Determines the crate paths to use by looking at the metadata of the project.

The names will be:

• ethers::* if ethers is a dependency for all crates;
• for each crate:
  • ethers_<crate> if it is a dependency, otherwise ethers::<crate>.

pub fn is_crate_root(&self) -> bool

Returns whether the crate path identifier refers to the root package.

This is false for integration tests, benches, and examples, as the crate keyword will not refer to the root package.

We can find this using some environment variables set by Cargo during compilation:

• CARGO_TARGET_TMPDIR is only set when building integration test or benchmark code;
• When CARGO_MANIFEST_DIR contains /benches/ or /examples/
• CARGO_CRATE_NAME, see is_crate_name_in_dirs.

pub fn is_crate_name_in_dirs(&self) -> bool

Returns whether crate_name is the name of a file or directory in the first level of manifest_dir/{benches,examples,tests}/.

Example

With this project structure:

.
├── Cargo.lock
├── Cargo.toml
├── src/
│   ...
├── benches/
│   ├── large-input.rs
│   └── multi-file-bench/
│       ├── main.rs
│       └── bench_module.rs
├── examples/
│   ├── simple.rs
│   └── multi-file-example/
│       ├── main.rs
│       └── ex_module.rs
└── tests/
    ├── some-integration-tests.rs
    └── multi-file-test/
        ├── main.rs
        └── test_module.rs

The resulting CARGO_CRATE_NAME values will be:

Path	Value
benches/large-input.rs	large-input
benches/multi-file-bench/**/*.rs	multi-file-bench
examples/simple.rs	simple
examples/multi-file-example/**/*.rs	multi-file-example
tests/some-integration-tests.rs	some-integration-tests
tests/multi-file-test/**/*.rs	multi-file-test

Trait Implementations

impl Clone for ProjectEnvironment

fn clone(&self) -> ProjectEnvironment

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProjectEnvironment

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

Formats the value using the given formatter.

impl PartialEq for ProjectEnvironment

fn eq(&self, other: &ProjectEnvironment) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ProjectEnvironment

impl StructuralPartialEq for ProjectEnvironment