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79942fea1b
This commit implements a new unstable feature for manifests which allows
renaming a crate when depending on it. For example you can do:
```toml
cargo-features = ["dependencies-as"]
...
[dependencies]
foo = "0.1"
bar = { version = "0.1", registry = "custom", package = "foo" }
baz = { git = "https://github.com/foo/bar", package = "foo" }
```
Here three crates will be imported but they'll be made available to the Rust
source code via the names `foo` (crates.io), `bar` (the custom registry), and
`baz` (the git dependency). The *package* name, however, will be `foo` for all
of them. In other words the git repository here would be searched for a crate
called `foo`. For example:
```rust
extern crate foo; // crates.io
extern crate bar; // registry `custom`
extern crate baz; // git repository
```
The intention here is to enable a few use cases:
* Enable depending on the same named crate from different registries
* Allow depending on multiple versions of a crate from one registry
* Removing the need for `extern crate foo as bar` syntactically in Rust source
Currently I don't think we're ready to stabilize this so it's just a nightly
feature, but I'm hoping we can continue to iterate on it!
121 lines
2.9 KiB
Rust
121 lines
2.9 KiB
Rust
extern crate cargo;
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extern crate cargotest;
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extern crate hamcrest;
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use cargotest::support::{project, execs};
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use cargotest::support::registry::Package;
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use cargotest::ChannelChanger;
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use hamcrest::assert_that;
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#[test]
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fn gated() {
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let p = project("foo")
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.file("Cargo.toml", r#"
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[project]
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name = "foo"
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version = "0.0.1"
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authors = []
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[dependencies]
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bar = { package = "foo", version = "0.1" }
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"#)
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.file("src/lib.rs", "")
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.build();
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assert_that(p.cargo("build").masquerade_as_nightly_cargo(),
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execs().with_status(101)
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.with_stderr("\
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error: failed to parse manifest at `[..]`
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Caused by:
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feature `rename-dependency` is required
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consider adding `cargo-features = [\"rename-dependency\"]` to the manifest
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"));
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let p = project("bar")
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.file("Cargo.toml", r#"
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[project]
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name = "foo"
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version = "0.0.1"
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authors = []
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[dependencies]
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bar = { version = "0.1", package = "baz" }
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"#)
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.file("src/lib.rs", "")
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.build();
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assert_that(p.cargo("build").masquerade_as_nightly_cargo(),
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execs().with_status(101)
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.with_stderr("\
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error: failed to parse manifest at `[..]`
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Caused by:
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feature `rename-dependency` is required
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consider adding `cargo-features = [\"rename-dependency\"]` to the manifest
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"));
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}
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#[test]
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fn rename_dependency() {
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Package::new("bar", "0.1.0").publish();
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Package::new("bar", "0.2.0").publish();
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let p = project("foo")
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.file("Cargo.toml", r#"
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cargo-features = ["rename-dependency"]
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[project]
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name = "foo"
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version = "0.0.1"
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authors = []
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[dependencies]
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bar = { version = "0.1.0" }
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baz = { version = "0.2.0", package = "bar" }
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"#)
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.file("src/lib.rs", "
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extern crate bar;
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extern crate baz;
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")
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.build();
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assert_that(p.cargo("build").masquerade_as_nightly_cargo(),
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execs().with_status(0));
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}
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#[test]
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fn rename_with_different_names() {
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let p = project("foo")
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.file("Cargo.toml", r#"
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cargo-features = ["rename-dependency"]
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[project]
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name = "foo"
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version = "0.0.1"
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authors = []
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[dependencies]
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baz = { path = "bar", package = "bar" }
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"#)
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.file("src/lib.rs", "
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extern crate baz;
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")
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.file("bar/Cargo.toml", r#"
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[project]
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name = "bar"
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version = "0.0.1"
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authors = []
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[lib]
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name = "random_name"
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"#)
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.file("bar/src/lib.rs", "")
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.build();
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assert_that(p.cargo("build").masquerade_as_nightly_cargo(),
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execs().with_status(0));
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}
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